Novel electrolyte filling head and electrolyte filling equipment

Abstract

The utility model discloses a novel electrolyte filling head and electrolyte filling equipment, the filling head comprises a filling head main body, the upper surface of the filling head main body is provided with an air outlet pipe joint and a liquid inlet pipe joint, and the lower surface of the filling head main body is provided with a liquid filling pipe and an air suction pipe; the liquid injection pipe is arranged in the air suction pipe to form a sleeve structure, the liquid injection pipe is connected with the liquid inlet pipe connector through the liquid inlet pipe, and the air suction pipe is communicated with the air outlet pipe connector through a sleeve and the air outlet pipe. According to the utility model, the air suction pipe and the liquid injection pipe form a sleeve structure, so that the air suction pipe and the liquid injection pipe can be respectively connected with corresponding pipelines, the end part of the sleeve is blocked by the sealing ring, the air outlet pipe is communicated with the air suction pipe, and the electrolyte filling process and the vacuumizing process are not influenced mutually; and repeated vacuumizing, vacuum breaking and balancing are not needed, liquid injection can be completed at a time, and the electrolyte injection efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and specifically relates to a novel electrolyte filling head and electrolyte filling equipment. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] With the rapid development of new energy, the application of power or energy storage batteries is becoming more and more extensive. As an important process in the production process of power batteries, the electrolyte filling process of power batteries is one of the most common process routes. At present, when the power battery is filled with electrolyte, a bell-shaped self-locking fully sealed high-pressure isobaric box and a battery filling system are used to continuously vacuumize, break the air and balance, and complete the filling several times. This seriously affects the production capacity. In the process of filling, it is inevitable that the electrolyte will overflow, which will have a certain impact on the equipment and product quality in the later stage, and also have a certain impact on the yield rate of lithium power battery production.

[0004] In the prior art, announcement number CN216850260U discloses an electrolyte production injection device, which connects the infusion pipe, gas pipe and injection pipe through a three-way valve, and realizes the connection between the infusion pipe and the injection pipe, or the connection between the gas pipe and the injection pipe by switching the three-way valve, and realizes the injection of battery electrolyte through gas discharge and infusion loading. This electrolyte injection device has the following problems: both gas and infusion are realized by injection pipe, and the two cannot be carried out at the same time. There is still a need to constantly evacuate, break air and balance during the electrolyte injection process, resulting in low electrolyte injection efficiency. Utility Model Content

[0005] The utility model aims to provide a novel electrolyte filling head, which can realize that the liquid filling process and the vacuuming process do not affect each other, thereby improving the electrolyte injection efficiency.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] In the first aspect, an embodiment of the utility model provides a new type of electrolyte filling head, including a filling head body, an air outlet pipe joint and a liquid inlet pipe joint are arranged on the upper surface of the filling head body, an injection pipe and an air intake pipe are arranged on the lower surface of the filling head body, the injection pipe is arranged inside the air intake pipe to form a sleeve structure, the injection pipe is connected to the liquid inlet pipe joint through the liquid inlet pipe, and the air intake pipe is connected to the air outlet pipe joint through the sleeve and the air outlet pipe.

[0008] As a further technical solution, the filling head body is a rectangular box structure, and the liquid inlet pipe, sleeve and air outlet pipe are arranged inside the filling head body.

[0009] As a further technical solution, one end of the sleeve is butt-connected to the air intake pipe, and the other end is sealed by a sealing ring.

[0010] As a further technical solution, the air outlet pipe joint is connected to the side wall surface of the sleeve through the air outlet pipe.

[0011] As a further technical solution, the liquid injection port of the liquid injection pipe is 4-8 mm lower than the air intake port of the air intake pipe.

[0012] As a further technical solution, the gas outlet pipe joint is connected to the high vacuum pipeline, the nitrogen pipeline, the low vacuum pipeline and the normal pressure air pipeline respectively through a gas splitter.

[0013] As a further technical solution, the liquid inlet pipe joint is connected to a liquid adding pump through a pipeline, and the liquid adding pump and the pipeline are connected to the electrolyte storage tank.

[0014] As a further technical solution, a mounting plate is provided on the side wall surface of the filling head body, and the filling head body is fixed on the filling platform through the mounting plate.

[0015] In a second aspect, an embodiment of the utility model provides an electrolyte filling device, including a novel electrolyte filling head according to the first aspect, wherein a plurality of electrolyte filling heads are provided, and the plurality of electrolyte filling heads are arranged and distributed on a filling platform.

[0016] As a further technical solution, the upper surface of the filling platform is connected to a lifting cylinder.

[0017] The beneficial effects of the above-mentioned embodiments of the utility model are as follows:

[0018] The novel electrolyte filling head provided by the utility model forms a sleeve structure with an air intake pipe and an injection pipe, thereby enabling the air intake pipe and the injection pipe to be respectively connected to their corresponding pipes, and the end of the sleeve is sealed by a provided sealing ring, and the air outlet pipe is connected to the air intake pipe. The electrolyte filling and vacuuming processes do not affect each other. Compared with the existing injection structure, there is no need to repeatedly perform vacuuming, breaking air and balancing, and the injection can be completed at one time, thereby improving the electrolyte injection efficiency.

[0019] The novel electrolyte filling head provided by the utility model arranges the connecting pipelines between the air intake pipe and the liquid injection pipe and the air outlet pipe joint and the liquid inlet pipe structure in the filling head body of the box structure, which can protect the connecting pipelines.

[0020] The electrolyte filling equipment provided by the utility model has multiple filling heads arranged on a filling platform, and the filling platform is driven by a lifting cylinder to perform a filling action, so that multiple batteries can be filled at the same time, thereby improving the filling efficiency of the electrolyte. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] Figure 1 It is a structural schematic diagram of a novel electrolyte filling head in Example 1 of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure inside the filling head body in Example 1 of the utility model;

[0024] Figure 3 It is a structural schematic diagram of the electrolyte filling equipment in Example 2 of the utility model.

[0025] The schematic diagram is for illustrative purposes only;

[0026] Among them, 1. Filling head body; 2. Liquid inlet pipe joint; 3. Air outlet pipe joint; 4. Air suction pipe; 5. Air suction port; 6. Liquid injection pipe; 7. Liquid injection port; 8. Mounting plate; 9. Liquid inlet pipe; 10. Casing; 11. Sealing ring; 12. Air outlet pipe; 13. Filling platform; 14. Lifting cylinder. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0028] Example 1

[0029] In a typical implementation of the present invention, Figure 1 As shown, a novel electrolyte filling head is provided, including a filling head body 1, an air outlet pipe joint 3 and a liquid inlet pipe joint 2 are arranged on the upper surface of the filling head body 1, and a liquid injection pipe 6 and an air suction pipe 4 are arranged on the lower surface of the filling head body 1. The liquid injection pipe 6 is arranged inside the air suction pipe 4 to form a sleeve structure, and the end of the liquid injection pipe 6 is a circular liquid injection port 7. The air suction pipe 4 and the liquid injection pipe 6 are used as a gas circulation space, and the air suction port 6 is annular. The liquid injection pipe 6 is connected to the liquid inlet pipe joint 2 through the liquid inlet pipe 9, and the air suction pipe 4 is connected to the air outlet pipe joint 3 through the sleeve 10 and the air outlet pipe 12.

[0030] The vacuuming and equalization are achieved through the provided air inlet, the electrolyte is added through the liquid injection port, and the vacuuming and liquid injection processes are not affected by each other through the setting of the sleeve structure.

[0031] like Figure 2 As shown, the filling head body 1 is a rectangular box structure, and the liquid inlet pipe 9, sleeve 10 and air outlet pipe 12 are arranged inside the filling head body 1. Specifically, one end of the sleeve 10 is connected to the air intake pipe 4, and the other end is sealed by a sealing ring 11. The air outlet pipe joint 3 is connected to the side wall surface of the sleeve 10 through the air outlet pipe 12. Through the above structure, the air intake pipe 4 and the liquid injection pipe 6 forming the sleeve structure can be connected to their corresponding pipes respectively, the end of the sleeve is sealed by the set sealing ring, and the air outlet pipe 12 is connected to the air intake pipe 4.

[0032] In this embodiment, the liquid injection port of the liquid injection pipe is 4-8 mm lower than the air intake port of the air intake pipe.

[0033] In this embodiment, the air outlet pipe joint 3 is connected to the high vacuum pipeline, the nitrogen pipeline, the low vacuum pipeline and the normal pressure air pipeline respectively through a gas diverter. The gas diverter adopts the existing structure and connects the air outlet pipe joint 3 with different pipelines as needed to realize functions such as vacuuming, breaking air and balancing.

[0034] In this embodiment, the liquid inlet pipe joint 2 is connected to a liquid adding pump through a pipeline, and the liquid adding pump and the pipeline are connected to an electrolyte storage tank. The liquid adding pump provides power to inject electrolyte into the battery.

[0035] In this embodiment, a mounting plate 6 is provided on the side wall surface of the filling head body 1 , and the filling head body 1 is fixed on the filling platform 13 via the mounting plate 6 .

[0036] In this embodiment, the entire filling head is made of corrosion-resistant rubber.

[0037] Example 2

[0038] In a typical embodiment of the present invention, an electrolyte filling device is provided, including the novel electrolyte filling head of Example 1, wherein a plurality of electrolyte filling heads are provided, and the plurality of electrolyte filling heads are arranged and distributed on a filling platform 13.

[0039] Furthermore, the upper surface of the filling platform 13 is connected to the lifting cylinder 14, and the lifting cylinder 14 drives the filling platform to move up and down to fill the electrolyte.

[0040] The working principle of the electrolyte filling device provided in this embodiment is as follows:

[0041] When the battery arrives at the filling station, the filling head contacts the filling port through the linear module movement of the cylinder sliding. When the filling head is tightly fitted with the filling port, the air intake port starts to evacuate the air. After a delay of 10 milliseconds, the filling pump is turned on and the electrolyte is started to be filled through the liquid filling port. The filling pressure is slightly higher than the vacuum pressure of 0.05MPA. Since the filling pressure is 0.05MPA higher than the vacuum pressure, the battery shell will not be deformed. The liquid filling port is 5mm lower than the air intake port. The filled electrolyte flows directly to the bottom of the battery through the filling needle and will not be sucked away by the negative pressure of the air intake port. When the meter detects that the amount of filling has reached the process requirement, the liquid filling is stopped and the air intake port starts to equalize the pressure. After the equalization is completed, the filling head moves back through the linear module movement of the cylinder sliding to complete the filling.

[0042] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A new electrolyte filling head, characterized in that: It includes a filling head body, an air outlet pipe joint and a liquid inlet pipe joint are arranged on the upper surface of the filling head body, an injection pipe and an air suction pipe are arranged on the lower surface of the filling head body, the injection pipe is arranged inside the air suction pipe to form a sleeve structure, the injection pipe is connected to the liquid inlet pipe joint through the liquid inlet pipe, and the air suction pipe is connected to the air outlet pipe joint through the sleeve and the air outlet pipe.

2. The novel electrolyte filling head as claimed in claim 1, characterized in that: The filling head body is a rectangular box structure, and the liquid inlet pipe, sleeve pipe and air outlet pipe are arranged inside the filling head body.

3. The novel electrolyte filling head as claimed in claim 1, characterized in that: One end of the sleeve is butt-connected to the air intake pipe, and the other end is sealed by a sealing ring.

4. The novel electrolyte filling head as claimed in claim 3, characterized in that: The air outlet pipe joint is connected to the side wall surface of the sleeve through the air outlet pipe.

5. The novel electrolyte filling head as claimed in claim 1, characterized in that: The liquid injection port of the liquid injection pipe is 4-8 mm lower than the air intake port of the air intake pipe.

6. The novel electrolyte filling head as claimed in claim 1, characterized in that: The gas outlet pipe joint is connected to the high vacuum pipeline, the nitrogen pipeline, the low vacuum pipeline and the normal pressure air pipeline respectively through a gas splitter.

7. The novel electrolyte filling head as claimed in claim 1, characterized in that: The liquid inlet pipe joint is connected to a liquid adding pump through a pipeline, and the liquid adding pump and the pipeline are connected to an electrolyte storage tank.

8. The novel electrolyte filling head as claimed in claim 1, characterized in that: A mounting plate is arranged on the side wall surface of the filling head body, and the filling head body is fixed on the filling platform through the mounting plate.

9. An electrolyte filling device, comprising the novel electrolyte filling head according to any one of claims 1 to 8, characterized in that: A plurality of electrolyte filling heads are provided, and the plurality of electrolyte filling heads are arranged and distributed on the filling platform.

10. The electrolyte filling device according to claim 9, characterized in that: The upper surface of the filling platform is connected to the lifting cylinder.

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