Sealing suction nozzle, liquid injection system and formation system

Abstract

The utility model belongs to the field of lithium battery production, and particularly provides a sealing suction nozzle, a liquid injection system and a formation system, when the sealing suction nozzle works, an auxiliary channel and a main channel are both communicated with an external pipeline, the main channel is communicated with a liquid injection port, and the auxiliary channel abuts against a limiting step above the liquid injection port through an isolation groove; as the auxiliary channel and the main channel are both communicated with the external pipeline, the external pipeline provides positive pressure or negative pressure, the pressure between the main channel and the auxiliary channel is kept consistent at the moment, no pressure difference exists, and leakage caused by the pressure is completely eradicated. Meanwhile, although pressure difference exists between the isolation groove and the outside, the amount of the electrolyte leaked to the outside through the isolation groove is extremely small due to the fact that part of the electrolyte is isolated through the isolation groove, and therefore the sealing performance is improved.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery production, in particular to a sealed suction nozzle, a liquid injection system and a formation system. Background Art

[0002] In the production of lithium-ion square aluminum shell power batteries, liquid injection and formation are two indispensable processes.

[0003] In the liquid injection and formation processes in the related art, due to the poor sealing performance of the liquid injection nozzle or the negative pressure suction nozzle, serious electrolyte leakage and contamination of the battery cell surface will occur after repeated use, resulting in a decrease in the battery cell yield and reduced production efficiency.

[0004] The related art adopts the method of applying positive pressure to the liquid injection nozzle or frequently replacing the negative pressure suction nozzle to improve the sealing. Applying positive pressure will cause excessive stress on the liquid injection nozzle, which will easily damage the liquid injection nozzle, thereby destroying the sealing of the liquid injection nozzle. Frequent replacement of negative pressure suction nozzles will lead to excessively high costs and reduce production efficiency.

[0005] How to improve the sealing performance of the suction nozzle and reduce the replacement frequency of the sealing suction nozzle is currently an urgent problem to be solved. Utility Model Content

[0006] The utility model aims to provide a sealed suction nozzle, a liquid injection system and a chemical formation system.

[0007] In order to solve the above technical problems, the utility model provides a sealing nozzle, comprising:

[0008] Nozzle body;

[0009] The nozzle body is provided with a main channel and an auxiliary channel;

[0010] The main channel and the auxiliary channel both pass through the nozzle body;

[0011] An isolation groove is provided at the bottom of the nozzle body;

[0012] The auxiliary channel is communicated with the isolation trench.

[0013] Further, the main channel includes a first cavity and a second cavity;

[0014] The diameter of the first cavity is smaller than that of the second cavity;

[0015] The first cavity is communicated with the second cavity and is arranged above the second cavity.

[0016] Furthermore, the diameter of the first cavity is greater than the diameter of the auxiliary channel.

[0017] Furthermore, the number of the auxiliary channels is greater than or equal to one.

[0018] Furthermore, the nozzle body is cylindrical.

[0019] Furthermore, a first sealing ring is formed between the outer wall of the isolation groove and the outer wall of the nozzle body;

[0020] A second sealing ring is formed between the inner wall of the isolation groove and the inner wall of the main channel.

[0021] The utility model also provides a liquid injection system, including a liquid injection device, a liquid injection pipe and the sealing suction nozzle as described above;

[0022] The liquid outlet of the liquid injection device is connected to the sealing nozzle through a liquid injection tube;

[0023] The sealing nozzle is inserted into the liquid injection port of the lithium battery to be injected.

[0024] Furthermore, the injection tube is connected to both the main channel and the auxiliary channel.

[0025] The utility model also provides a formation system, a negative pressure formation device, a formation tube and a sealing nozzle as described above;

[0026] The negative pressure port of the formation equipment is connected to the sealing nozzle through a formation tube;

[0027] The sealed suction nozzle is inserted into the liquid injection port of the lithium battery to be formed.

[0028] Furthermore, the formation tube is connected to both the main channel and the auxiliary channel.

[0029] The beneficial effect of the utility model is that the utility model provides a sealed suction nozzle, a liquid injection system and a formation system, wherein the sealed suction nozzle comprises: a suction nozzle body; the suction nozzle body is provided with a main channel and an auxiliary channel; the main channel and the auxiliary channel both penetrate the suction nozzle body; an isolation groove is provided at the bottom of the suction nozzle body; the auxiliary channel is connected to the isolation groove. When the sealed suction nozzle is working, the auxiliary channel and the main channel are both connected to the external pipeline, the main channel is connected to the liquid injection port, and the auxiliary channel is abutted against the limiting step above the liquid injection port through the isolation groove. Since the auxiliary channel and the main channel are both connected to the external pipeline, the external pipeline provides positive pressure or negative pressure. At this time, the pressure between the main channel and the auxiliary channel remains consistent, there is no pressure difference, and leakage caused by pressure is eliminated. At the same time, although there is a pressure difference between the isolation groove and the outside world, since part of the electrolyte is isolated by the isolation groove, the amount of electrolyte leaking to the outside through the isolation groove is extremely small, thereby improving the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0031] Figure 1 It is a schematic diagram of the structure of the sealing nozzle provided by the embodiment of the utility model.

[0032] Figure 2 It is a bottom view of the sealing nozzle provided by the embodiment of the utility model.

[0033] Figure 3 It is a cross-sectional view of the sealing nozzle provided in the embodiment of the utility model.

[0034] Figure 4 It is a cross-sectional view of the sealing suction nozzle provided by the embodiment of the utility model after being inserted into the liquid injection port.

[0035] In the figure: 100, nozzle body; 110, main channel; 111, first cavity; 112, second cavity; 120, auxiliary channel; 130, isolation groove; 140, first sealing ring; 150, second sealing ring; 200, liquid injection port; 210, limiting step. DETAILED DESCRIPTION

[0036] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0037] For examples, see Figure 1-Figure 4 At least one embodiment further provides a sealed suction nozzle, comprising: a suction nozzle body 100; the suction nozzle body 100 is provided with a main channel 110 and an auxiliary channel 120; the main channel 110 and the auxiliary channel 120 both penetrate the suction nozzle body 100; the bottom of the suction nozzle body 100 is provided with an isolation groove 130; the auxiliary channel 120 is connected with the isolation groove 130. When the sealed suction nozzle is working, the auxiliary channel 120 and the main channel 110 are both connected with the external pipeline, the main channel 110 is connected with the injection port 200, and the auxiliary channel 120 is abutted against the limiting step 210 above the injection port 200 through the isolation groove 130. Since the auxiliary channel 120 and the main channel 110 are both connected with the external pipeline, the external pipeline provides positive pressure or negative pressure. At this time, the pressure between the main channel 110 and the auxiliary channel 120 is kept consistent, there is no pressure difference, and leakage caused by pressure is eliminated. At the same time, although there is a pressure difference between the isolation groove 130 and the outside, since part of the electrolyte is isolated by the isolation groove 130, the amount of electrolyte leaking to the outside through the isolation groove 130 is extremely small, thereby improving the sealing performance.

[0038] It should be noted that a first sealing ring 140 is formed between the outer wall of the isolation groove 130 and the outer wall of the nozzle body 100, and a second sealing ring 150 is formed between the inner wall of the isolation groove 130 and the inner wall of the main channel 110. The sealing performance of the sealed nozzle is improved by providing two layers of sealing rings.

[0039] The main channel 110 includes a first cavity 111 and a second cavity 112 ; the diameter of the first cavity 111 is smaller than that of the second cavity 112 ; the first cavity 111 is connected to the second cavity 112 and is disposed above the second cavity 112 .

[0040] It should be noted that the diameter of the first cavity 111 is larger than the diameter of the auxiliary channel 120. Since the diameter of the first cavity 111 is larger than the diameter of the auxiliary channel 120, when the external pipeline provides negative pressure or positive pressure, most of the fluid will enter the main channel 110 and enter the injection port 200 of the lithium battery to complete injection or formation. A small part of the fluid enters the auxiliary channel 120 and enters the isolation groove 130 to balance the pressure between the auxiliary channel 120 and the main channel 110, and reduce the leakage of the electrolyte into the isolation groove 130.

[0041] Wherein, the number of the auxiliary channels 120 is greater than or equal to one.

[0042] In this embodiment, the nozzle body 100 is cylindrical. It should be noted that the size and shape of the nozzle body 100 are adapted to the liquid injection port 200 of the lithium battery and the limiting step 210 above the liquid injection port 200.

[0043] At least one embodiment also provides a liquid injection system, including a liquid injection device, a liquid injection tube and a sealed suction nozzle as described above; the liquid outlet of the liquid injection device is connected to the sealed suction nozzle through the liquid injection tube; the sealed suction nozzle is inserted into the liquid injection port 200 of the lithium battery to be injected.

[0044] The injection pipe is connected to both the main channel 110 and the auxiliary channel 120 .

[0045] At least one embodiment further provides a formation system, a negative pressure formation device, a formation tube and a sealed suction nozzle as described above; the negative pressure port of the formation device is connected to the sealed suction nozzle through the formation tube; the sealed suction nozzle is inserted into the liquid injection port 200 of the lithium battery to be formed.

[0046] The formation tube is connected to both the main channel 110 and the auxiliary channel 120 .

[0047] In summary, the utility model provides a sealed suction nozzle, a liquid injection system and a chemical formation system, wherein the sealed suction nozzle comprises: a suction nozzle body 100; the suction nozzle body 100 is provided with a main channel 110 and an auxiliary channel 120; the main channel 110 and the auxiliary channel 120 both penetrate the suction nozzle body 100; the bottom of the suction nozzle body 100 is provided with an isolation groove 130; the auxiliary channel 120 is connected with the isolation groove 130. When the sealed suction nozzle is working, the auxiliary channel 120 and the main channel 110 are both connected with the external pipeline, the main channel 110 is connected with the liquid injection port 200, and the auxiliary channel 120 is abutted against the limiting step 210 above the liquid injection port 200 through the isolation groove 130. Since the auxiliary channel 120 and the main channel 110 are both connected with the external pipeline, the external pipeline provides positive pressure or negative pressure. At this time, the pressure between the main channel 110 and the auxiliary channel 120 is kept consistent, there is no pressure difference, and leakage caused by pressure is eliminated. At the same time, although there is a pressure difference between the isolation groove 130 and the outside, since part of the electrolyte is isolated by the isolation groove 130, the amount of electrolyte leaking to the outside through the isolation groove 130 is extremely small, thereby improving the sealing performance.

[0048] All devices (parts without specific structure) selected in this application are universal standard parts or parts known to those skilled in the art, and their structures and principles can be known by those skilled in the art through technical manuals or conventional experimental methods. In addition, the software programs involved in this application are all prior art, and this application does not involve any improvement to the software programs.

[0049] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0051] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A sealed suction nozzle, characterized in that: include: Nozzle body; The nozzle body is provided with a main channel and an auxiliary channel; The main channel and the auxiliary channel both pass through the nozzle body; An isolation groove is provided at the bottom of the nozzle body; The auxiliary channel is communicated with the isolation trench.

2. The sealing nozzle according to claim 1, characterized in that: The main channel includes a first cavity and a second cavity; The diameter of the first cavity is smaller than that of the second cavity; The first cavity is communicated with the second cavity and is arranged above the second cavity.

3. The sealing nozzle according to claim 2, characterized in that: The diameter of the first cavity is greater than the diameter of the auxiliary channel.

4. The sealing nozzle according to claim 1, characterized in that: The number of the auxiliary channels is greater than or equal to 1.

5. The sealing nozzle according to claim 1, characterized in that: The nozzle body is cylindrical.

6. The sealing nozzle according to claim 1, characterized in that: A first sealing ring is formed between the outer wall of the isolation groove and the outer wall of the nozzle body; A second sealing ring is formed between the inner wall of the isolation groove and the inner wall of the main channel.

7. A liquid injection system, characterized in that: It comprises a liquid injection device, a liquid injection pipe and a sealing nozzle as claimed in any one of claims 1 to 6; The liquid outlet of the liquid injection device is connected to the sealing nozzle through a liquid injection tube; The sealing nozzle is inserted into the liquid injection port of the lithium battery to be injected.

8. The liquid injection system according to claim 7, characterized in that: The injection pipe is communicated with both the main channel and the auxiliary channel.

9. A chemical formation system, characterized in that: Negative pressure forming equipment, forming tube and sealed nozzle as claimed in any one of claims 1 to 6; The negative pressure port of the formation equipment is connected to the sealing nozzle through a formation tube; The sealed suction nozzle is inserted into the liquid injection port of the lithium battery to be formed.

10. The chemical formation system according to claim 9, characterized in that: The formation tube is communicated with both the main channel and the auxiliary channel.

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