Anti-dripping liquid injection nozzle structure

Abstract

The utility model discloses an anti-dripping liquid injection nozzle structure, relates to the technical field of liquid injection equipment for lithium battery production, and solves the problems that the middle of a traditional liquid injection nozzle is relatively open, part of electrolyte is remained on the inner wall of the liquid injection nozzle when liquid injection is finished, and the residual electrolyte drips, so that liquid injection equipment is in the liquid injection process. Comprising a liquid injection nozzle body, the tail end of the liquid injection nozzle body is detachably connected with a liquid injection assembly, the liquid injection assembly comprises a middle abutting channel, the abutting channel comprises a middle sharp mouth part and a peripheral abutting part, the abutting part abuts against the outside of a battery, the sharp mouth part extends into a liquid injection opening of the battery, a gap is formed between the sharp mouth part and the inner circumference of the liquid injection opening, and a plurality of diaphragms are arranged in the sharp mouth part. The diaphragms are spliced into a round bowl shape with a downward radian in a natural state and are opened downwards under the action of liquid injection pressure. The problem that residual liquid drips after liquid injection of the liquid injection nozzle is finished is solved, and the effect of reducing pollution to the liquid injection opening of the battery is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery production liquid injection equipment technical field especially relates to a kind of liquid injection nozzle structure of preventing liquid drop. BACKGROUND

[0002] Lithium ion battery is a kind of chemical energy storage device with high energy density, generally, after the process of electrolyte filling, electrolyte needs to be injected into lithium ion battery by liquid injection pump through liquid injection nozzle, then the sealing of aluminum plastic film opening position is completed;

[0003] However, the middle of traditional liquid injection nozzle is relatively spacious, and some electrolyte will remain on the inner wall of the liquid injection nozzle at the end of liquid injection. These residual liquid will drop, causing the electrolyte to drop on the surface of the battery during the liquid injection process. The dropped electrolyte is easy to contaminate the battery injection port, affecting the subsequent battery process, reducing the process yield, and causing cell defects (for example, when injecting electrolyte into the battery, after the liquid injection is completed, there are still electrolyte droplets on the liquid injection nozzle. When the residual electrolyte droplets drop to other positions except the electrolyte injection hole, it causes welding defects when welding the electrolyte injection hole subsequently). It also causes waste of electrolyte, increasing the production material cost. SUMMARY

[0004] The utility model aims to provide a kind of liquid injection nozzle structure of preventing liquid drop, reduce the problem that residual liquid drops after liquid injection of liquid injection nozzle, reduce the occurrence of the situation that the battery injection port is contaminated.

[0005] The above technical purpose of the utility model is realized by the following technical scheme:

[0006] A kind of liquid injection nozzle structure of preventing liquid drop is connected to liquid injection nozzle main body, including liquid injection component, liquid injection component is detachably connected to the end of liquid injection nozzle main body, liquid injection component includes the sharp nozzle part of middle part and the abutment portion of outer periphery, the abutment portion is abutted to battery, the sharp nozzle part is inserted into battery injection port and there is gap between the inner periphery of injection port, the sharp nozzle part is provided with a plurality of diaphragms, diaphragm is mutually spliced as a circular bowl shape with one radian downward in natural state, and opens downward under the action of liquid injection pressure.

[0007] By adopting the above technical scheme, the sharp nozzle part is inserted into the battery injection port and there is gap between the inner periphery of the injection port, avoiding the contact of the liquid drop with the injection port. The sharp nozzle part is provided with a plurality of diaphragms, which are mutually spliced as a circular bowl shape with one radian downward in natural state, and open downward under the action of liquid injection pressure. The diaphragm has a radian, which can catch the residual liquid inside the liquid injection nozzle and prevent it from dropping.

[0008] Further, the abutment portion inner periphery is provided with a separate relief ring from the sharp nozzle part.

[0009] By adopting the above technical scheme, the contact between the droplet and the liquid injection port is further reduced.

[0010] Further, the sharp nozzle part is connected to the liquid injection assembly in an extendable and retractable manner.

[0011] By adopting the above technical scheme, the contact between the droplet and the liquid injection port is further reduced, and the liquid injection height can be adjusted according to the height of the liquid injection port and the needs, so that the electrolyte can be more stably injected into the battery, reducing problems such as sputtering.

[0012] Further, the upper end of the sharp nozzle part is connected to the driving air cylinder, and the driving air cylinder drives the sharp nozzle part to extend and retract in the liquid injection assembly. The abutting part is also connected to a limiting assembly, which limits the extension and retraction of the sharp nozzle part.

[0013] By adopting the above technical scheme, the extension and retraction of the sharp nozzle part are realized.

[0014] Further, the limiting assembly limits the position of the sharp nozzle part extending out of the abutting part and completely retracting into the abutting part.

[0015] By adopting the above technical scheme, the limiting assembly limits the position of the sharp nozzle part extending out of the abutting part and completely retracting into the abutting part.

[0016] Further, the limiting assembly includes a limiting screw, which is threadedly connected to the liquid injection assembly. An axial limiting groove is formed in the outer periphery of the sharp nozzle part, and the end of the limiting screw abuts in the limiting groove. When the limiting screw moves to the positions abutting at both ends of the limiting groove, the positions correspond to the position of the sharp nozzle part extending out of the abutting part and the position of the sharp nozzle part completely retracting into the abutting part, respectively.

[0017] By adopting the above technical scheme, the end of the limiting screw abuts in the limiting groove, and the positions correspond to the position of the sharp nozzle part extending out of the abutting part and the position of the sharp nozzle part completely retracting into the abutting part, respectively.

[0018] Further, the upper end of the sharp nozzle part is connected to the driving air cylinder, and the middle part is connected to the liquid injection pipeline. A pipe groove is formed in the outer periphery of the liquid injection assembly, for the liquid injection pipeline to move up and down with the sharp nozzle part.

[0019] By adopting the above technical scheme, the liquid injection, extension and retraction of the sharp nozzle part are realized, and the simplicity of the device structure is improved.

[0020] Further, the output end of the driving air cylinder is provided with a horizontal T-shaped block, a horizontal T-shaped groove is formed in the top of the sharp nozzle part, an opening is formed in one side of the liquid injection assembly, the sharp nozzle part enters the liquid injection assembly from the opening, and is inserted into the output end of the driving air cylinder through the T-shaped groove. The abutting part is threadedly connected to the lower end of the liquid injection assembly and is sleeved on the outside of the sharp nozzle part.

[0021] By adopting the technical scheme, the pointed nozzle part enters the liquid injection assembly through the opening position of the liquid injection assembly, is inserted with the output end of the driving cylinder through the T-shaped groove, finally, is sleeved outside the pointed nozzle part through the abutting part, and guides the up-down sliding of the pointed nozzle part, so that the pointed nozzle part is conveniently disassembled and assembled with the driving cylinder and the liquid injection assembly.

[0022] In summary, the utility model has the following beneficial effects:

[0023] The prior art is prone to welding defects when welding the electrolyte injection hole after the liquid injection is completed because of the residual electrolyte droplets on the liquid injection nozzle; the pointed nozzle part of the present application extends into the battery liquid injection port and has a gap between the inner periphery of the liquid injection port, thereby avoiding contact between the droplets and the liquid injection port, and a plurality of diaphragms are arranged in the pointed nozzle part and are combined into a circular bowl shape with a downward arc, which is opened downward under the action of the liquid injection pressure, can catch the residual liquid inside the liquid injection nozzle after the liquid injection is completed to prevent the liquid from dripping, and the telescopic liquid injection nozzle part is arranged, thereby facilitating the adaptation to different battery liquid injection nozzle sizes and liquid injection height requirements. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the drawings without creative labor.

[0025] Figure 1 It is the overall structure schematic view of the liquid injection nozzle structure of the utility model for preventing liquid dripping;

[0026] Figure 2 It is the structure schematic view of the diaphragm part in the liquid injection nozzle structure of the utility model for preventing liquid dripping;

[0027] Figure 3 It is the connection schematic view between the driving cylinder and the pointed nozzle part in the liquid injection nozzle structure of the utility model for preventing liquid dripping.

[0028] In the drawing, 1, liquid injection assembly;2, pointed nozzle part;21, limiting groove;22, liquid injection pipeline;23, T-shaped groove;3, abutting part;31, avoiding ring;4, diaphragm;5, driving cylinder;51, T-shaped block;6, limiting screw. DETAILED DESCRIPTION

[0029] The specific embodiments of the utility model will be further described in combination with the drawings, and the embodiments do not constitute a limitation on the utility model. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present application.

[0030] A kind of anti-dripping liquid nozzle structure, connect in liquid injection nozzle body, as shown in Figure 1 It includes liquid injection assembly 1, and liquid injection assembly 1 is detachably connected to the end of liquid injection nozzle body by screw etc., liquid injection assembly 1 includes the tip nozzle part 2 of middle part and the abutment part 3 of outer periphery, and the abutment part 3 is abutted to battery outside, and the tip nozzle part 2 is inserted into battery liquid injection port and there is gap between the inner periphery of liquid injection port;Liquid injection assembly 1 can also be provided with multiple, and simultaneously liquid injection is carried out to multiple batteries.

[0031] As shown in Figure 1 And Figure 2 The tip nozzle part 2 is tubular, and several diaphragms 4 are fixed in it, the diaphragms 4 are mutually spliced into a circular bowl shape with a downward arc in natural state, and open downward under the action of liquid injection pressure;Increase the anti-dripping diaphragm 4 in the middle of liquid injection nozzle, and the diaphragm 4 has an arc, which can catch residual liquid inside the liquid injection nozzle to prevent it from dripping.

[0032] As shown in Figure 1 The lower end inner periphery of abutment part 3 is provided with a separate avoidance ring 31 from tip nozzle part 2;The tip nozzle part 2 is connected to extend and retract in liquid injection assembly 1;Specifically, the upper end of tip nozzle part 2 is connected to drive cylinder 5, which drives it to extend and retract in liquid injection assembly 1, and a limiting assembly is also connected in abutment part 3, which limits the extension and retraction displacement of tip nozzle part 2;

[0033] The limiting assembly limits the position of tip nozzle part 2 extending outside abutment part 3 and completely retracting into abutment part 3;In this embodiment, the limiting assembly includes limiting screw 6, which is threadedly connected in liquid injection assembly 1, and the outer periphery of tip nozzle part 2 is provided with axial limiting groove 21, the end of limiting screw 6 abuts in limiting groove 21, and tip nozzle part 2 moves to the position where the two ends of limiting screw 6 and limiting groove 21 abut, corresponding to the position of tip nozzle part 2 extending outside abutment part 3 and completely retracting into abutment part 3 respectively;

[0034] The upper end of tip nozzle part 2 is connected to drive cylinder 5, which can be a cylinder connected to a lifting plate, and then connected to multiple output rods, so that one cylinder drives the lifting of multiple tip nozzle parts 2 (multiple liquid injection nozzle structures work together), the middle part is connected to liquid injection pipeline 22, which can be detachably connected to tip nozzle part 2 by thread etc., to facilitate the replacement of tip nozzle part 2 (because the diaphragm structure is provided, the tip nozzle needs to be replaced regularly), and the outer periphery of liquid injection assembly 1 is provided with pipe groove for the up-and-down movement of liquid injection pipeline 22 with tip nozzle part 2.

[0035] As shown in Figure 1 And Figure 3As shown, in order to further facilitate the replacement of the pointed nozzle part, in the embodiment, the output end of the driving cylinder 5 is fixed with a horizontal T-shaped block 51, a corresponding horizontal T-shaped groove 23 is opened at the top of the pointed nozzle part 2, the liquid injection assembly 1 is opened at one side, the pointed nozzle part 2 enters the liquid injection assembly 1 from the opening, and is inserted with the output end of the driving cylinder 5 through the T-shaped groove 23, the abutting part 3 is threadedly connected to the lower end of the liquid injection assembly 1 and is sleeved on the outside of the pointed nozzle part 2, and the guiding pointed nozzle part 2 slides up and down, so that the pointed nozzle part 2 is convenient to replace, and in other embodiments, the abutting part 3 can also be replaced by a cylindrical structure or the like, so as to reduce the interference.

[0036] The above is only a preferred embodiment of the present application, and is not used to limit the present application. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and the modification or equivalent replacement should also be regarded as falling within the protection scope of the technical scheme of the present application.

Claims

1. A drip-proof liquid injection nozzle structure connected to a liquid injection nozzle body, characterized in that: The invention comprises a liquid injection assembly (1), wherein the liquid injection assembly (1) is detachably connected to the end of the liquid injection nozzle body, the liquid injection assembly (1) comprises a pointed mouth portion (2) in the middle and an abutting portion (3) on the outer periphery, the abutting portion (3) abuts against the outside of the battery, the pointed mouth portion (2) extends into the liquid injection port of the battery and has a gap with the inner periphery of the liquid injection port, a plurality of diaphragms (4) are arranged in the pointed mouth portion (2), and the diaphragms (4) are spliced ​​together to form a circular bowl shape with an arc downward in a natural state, and open downward under the action of the liquid injection pressure.

2. The anti-drip liquid injection nozzle structure according to claim 1, characterized in that: An escape circle (31) separated from the pointed mouth (2) is provided on the inner periphery of the lower end of the abutting portion (3).

3. The anti-drip liquid injection nozzle structure according to claim 1 or 2, characterized in that: The pointed mouth portion (2) is telescopically connected to the liquid injection component (1).

4. The anti-drip liquid injection nozzle structure according to claim 3, characterized in that: The upper end of the pointed mouth portion (2) is connected to a driving cylinder (5) to drive it to expand and contract in the liquid injection assembly (1); a limiting assembly is also connected to the abutting portion (3), and the limiting assembly limits the expansion and contraction displacement of the pointed mouth portion (2).

5. The anti-drip liquid injection nozzle structure according to claim 4, characterized in that: The limiting assembly limits the pointed mouth portion (2) to a position extending outside the abutment portion (3) and completely retracting into the abutment portion (3).

6. The anti-drip liquid injection nozzle structure according to claim 5, characterized in that: The limiting assembly comprises a limiting screw (6), which is threadedly connected to the injection assembly (1), and an axial limiting groove (21) is provided on the outer periphery of the pointed mouth portion (2), and the end of the limiting screw (6) abuts against the limiting groove (21). The position where the limiting screw (6) moves to abut against the two ends of the limiting groove (21) corresponds to the position where the pointed mouth portion (2) extends outside the abutting portion (3) and the position where the pointed mouth portion (2) is completely retracted into the abutting portion (3).

7. The anti-drip liquid injection nozzle structure according to claim 4, characterized in that: The upper end of the pointed mouth portion (2) is connected to the driving cylinder (5), and the middle portion is connected to the liquid injection pipeline (22). A pipe groove is provided on the outer periphery of the liquid injection component (1) for the liquid injection pipeline (22) to move up and down with the pointed mouth portion (2).

8. The anti-drip liquid injection nozzle structure according to claim 4, characterized in that: The output end of the driving cylinder (5) is provided with a horizontal T-shaped block (51), the top of the pointed mouth portion (2) is provided with a horizontal T-shaped slot (23), one side of the liquid injection component (1) is open, the pointed mouth portion (2) enters the liquid injection component (1) from the opening, and is plugged into the output end of the driving cylinder (5) through the T-shaped slot (23), and the abutting portion (3) is threadedly connected to the lower end of the liquid injection component (1) and is sleeved outside the pointed mouth portion (2).

Images