Vacuum liquid injection system

Abstract

The utility model discloses a vacuum liquid injection system which comprises a buffer tank, a vacuum mechanism, a bubble processing mechanism and a liquid injection tank, the vacuum mechanism is used for performing vacuum extraction on the interior of the buffer tank; the bubble treatment mechanism is connected to the interior of the buffer tank, and the bubble treatment mechanism can drive the electrolyte in the buffer tank to move and promote bubbles in the electrolyte to be separated from the electrolyte; the liquid injection tank is connected with the buffer tank, and the buffer tank can convey electrolyte in the buffer tank to the liquid injection tank. When the electrolyte is stored in the buffer tank, the bubble treatment mechanism can be started, and bubbles in the electrolyte in the buffer tank are separated. And at the moment, the vacuum mechanism can perform vacuum extraction action on the buffer tank, so that the separated or separated bubbles are extracted and discharged, the effect of discharging the bubbles is achieved, and the influence of the bubbles on the judgment of the liquid injection amount in the electrolyte injection process can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of batteries, and particularly relates to a vacuum liquid injection system. Background Art

[0002] As is well known, during the production and manufacturing process of components such as lithium batteries, it is necessary to inject electrolyte into the battery. Currently, the electrolyte in the tank is mainly injected into the battery through a liquid injection machine. However, when the electrolyte is stored in the tank, there are often bubbles, and the presence of bubbles often leads to inaccurate liquid injection volume during liquid injection. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a vacuum liquid injection system, which can perform liquid injection operations more accurately.

[0004] The vacuum liquid injection system according to the first aspect embodiment of the utility model includes: a buffer tank, a vacuum mechanism, a bubble treatment mechanism, and a liquid injection tank; the vacuum mechanism is connected to the inside of the buffer tank, and the vacuum mechanism is used to extract vacuum from the inside of the buffer tank; the bubble treatment mechanism is connected to the inside of the buffer tank, and the bubble treatment mechanism can drive the electrolyte in the buffer tank to move and prompt the bubbles therein to separate from the electrolyte; the liquid injection tank is connected to the buffer tank, and the buffer tank can transport the electrolyte inside it to the liquid injection tank.

[0005] The vacuum liquid injection system according to the embodiment of the utility model has at least the following beneficial effects: when the electrolyte is stored, it will first enter the buffer tank. When the electrolyte is stored in the buffer tank, the bubble treatment mechanism can be started to separate the bubbles in the electrolyte in the buffer tank. At this time, the vacuum mechanism can perform a vacuum extraction operation on the buffer tank to extract and discharge the bubbles during separation or after separation, so as to achieve the effect of discharging bubbles, and thus effectively avoid the influence of bubbles on the judgment of the liquid injection volume during the injection of the electrolyte.

[0006] After the electrolyte is discharged from bubbles in the buffer tank, it can be transported to the liquid injection tank for storage in the liquid injection tank. The electrolyte stored in the liquid injection tank can be used in combination with a liquid injection machine for liquid injection operations, and the influence of bubbles during the injection process can be avoided, so that the production and manufacturing process of the battery can proceed more smoothly.

[0007] According to some embodiments of the utility model, the vacuum mechanism includes a first pump body disposed outside the buffer tank, and the first pump body is connected with an air delivery pipe, and a part of the air delivery pipe extends into the buffer tank.

[0008] According to some embodiments of the present utility model, there are multiple first pump bodies, and each first pump body is separately connected to the gas transmission pipe extending into the buffer tank; at least one first pump body is used to extract the gas in the buffer tank, and at least one first pump body is used to add gas to the interior of the buffer tank.

[0009] According to some embodiments of the present utility model, the liquid injection tank is provided with multiple second pump bodies and all are communicated into the liquid injection tank; at least one second pump body is used to extract the gas in the liquid injection tank, and at least one second pump body is used to add gas to the interior of the liquid injection tank.

[0010] According to some embodiments of the present utility model, the bubble treatment mechanism includes a driving motor and a stirring paddle, the stirring paddle rotatably extends into the buffer tank, and the driving motor is connected to the stirring paddle and can drive it to rotate.

[0011] According to some embodiments of the present utility model, a pipeline group is provided between the buffer tank and the liquid injection tank, the pipeline group is used to guide the fluid to flow into and / or out of the buffer tank, and the pipeline group is used to guide the fluid to flow into and / or out of the liquid injection tank.

[0012] According to some embodiments of the present utility model, the pipeline group includes a first connecting pipe, a second connecting pipe and a control valve, the first connecting pipe is communicated with the interior of the buffer tank, the second connecting pipe is communicated with the interior of the liquid injection tank, and the first connecting pipe and the second connecting pipe are connected through the control valve.

[0013] According to some embodiments of the present utility model, the first connecting pipe is connected with a first three-way pipe, the first three-way pipe is connected with the control valve; the first three-way pipe is connected with a first fluid valve, and the first fluid valve can control the fluid to enter or leave the buffer tank.

[0014] According to some embodiments of the present utility model, the second connecting pipe is connected with a second three-way pipe, the second three-way pipe is connected with the control valve; the second three-way pipe is connected with a second fluid valve, and the second fluid valve can control the fluid to enter or leave the liquid injection tank.

[0015] According to some embodiments of the present utility model, a liquid level pipe is provided on the outer wall of the buffer tank and / or the liquid injection tank, and a liquid level sensor is provided on the liquid level pipe.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0017] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0018] Figure 1 is a schematic diagram of a vacuum liquid injection system according to an embodiment of the present utility model;

[0019] Figure 2 is Figure 1 a schematic diagram of a buffer tank of the shown vacuum liquid injection system;

[0020] Figure 3 is Figure 1 a schematic diagram of a liquid injection tank of the shown vacuum liquid injection system;

[0021] Figure 4 is Figure 1 a schematic diagram of a pipeline group of the shown vacuum liquid injection system;

[0022] Reference numerals: buffer tank 100; liquid injection tank 200; liquid injection joint 270; bubble treatment mechanism 300; drive motor 330; stirring paddle 370; vacuum mechanism 400; gas transmission pipe 430; first pump body 450; second pump body 600; pipeline group 700; first connecting pipe 710; first fluid valve 713; first three-way pipe 718; second connecting pipe 720; second fluid valve 723; second three-way pipe 728; control valve 750; liquid level pipe 800; Detailed Embodiment

[0023] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where 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 the present utility model and should not be construed as a limitation of the present utility model.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 thus should not be construed as a limitation of the present utility model.

[0025] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the corresponding number, while understandings such as "above", "below", "within", etc. include the corresponding number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0026] In the description of the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present utility model in combination with the specific content of the technical solution.

[0027] Refer to Figure 1 , a vacuum liquid injection system, comprising: a buffer tank 100, a vacuum mechanism 400, a bubble treatment mechanism 300, and a liquid injection tank 200; the vacuum mechanism 400 is connected to the inside of the buffer tank 100, and the vacuum mechanism 400 is used to perform vacuum extraction on the inside of the buffer tank 100; the bubble treatment mechanism 300 is connected to the inside of the buffer tank 100, and the bubble treatment mechanism 300 can drive the electrolyte in the buffer tank 100 to move and promote the separation of bubbles therein from the electrolyte; the liquid injection tank 200 is connected to the buffer tank 100, and the buffer tank 100 can transport the electrolyte inside it to the liquid injection tank 200. When the electrolyte is stored, it will first enter the buffer tank 100. When the electrolyte is stored in the buffer tank 100, the bubble treatment mechanism 300 can be started, and the bubbles in the electrolyte in the buffer tank 100 can be separated. At this time, the vacuum mechanism 400 can perform a vacuum extraction operation on the buffer tank 100, so as to extract and discharge the bubbles during separation or after separation, and thus achieve the effect of discharging bubbles, so that the influence of bubbles on the determination of the liquid injection volume during the injection process of the electrolyte can be effectively avoided. After the bubbles in the buffer tank 100 are removed, the electrolyte can be transported to the liquid injection tank 200 for storage in the liquid injection tank 200. The electrolyte stored in the liquid injection tank 200 can be used in conjunction with a liquid injection machine for liquid injection operations, and the influence of bubbles during the liquid injection process can be avoided, so that the production and manufacturing process of the battery can proceed more smoothly.

[0028] Specifically, the liquid injection tank 200 is provided with a plurality of liquid injection joints 270 connected to its inside, and liquid injection operations can be performed through the docking between the liquid injection joints 270 and the liquid injection machine.

[0029] In some embodiments, refer to Figure 2The vacuum mechanism 400 includes a first pump body 450 disposed outside the buffer tank 100, and the first pump body 450 is connected to an air pipe 430, and a portion of the air pipe 430 extends into the buffer tank 100. After the first pump body 450 is started, the air in the buffer tank 100 will be extracted through the air pipe 430, thereby achieving the effect of vacuum treatment of the buffer tank 100. The vacuum treatment not only makes it easier to store the electrolyte, but also can extract and discharge the bubbles separated from the electrolyte during the vacuuming process, thereby effectively achieving the effect of removing bubbles, so as to achieve the purpose of improving the accuracy of liquid injection.

[0030] It is conceivable that the first pump body 450 can also inflate the buffer tank 100 through the gas pipe 430, thereby pressurizing the inside of the buffer tank 100, thereby facilitating the outflow and use of the electrolyte. The specific implementation method can be adjusted accordingly according to actual needs and is not limited here.

[0031] In certain embodiments, reference Figure 1 There are multiple first pump bodies 450, and each first pump body 450 is individually connected to a gas delivery pipe 430 extending into the buffer tank 100; at least one first pump body 450 is used to extract gas from the buffer tank 100, and at least one first pump body 450 is used to add gas to the buffer tank 100. Multiple first pump bodies 450 can perform vacuum extraction and gas charging and pressurization respectively, so the buffer tank 100 can smoothly and orderly discharge bubbles from the electrolyte and remove the electrolyte itself, thereby completing the treatment of the electrolyte and the next step of storage.

[0032] In certain embodiments, reference Figure 3 The liquid injection tank 200 is provided with a plurality of second pump bodies 600 and all of them are connected to the liquid injection tank 200; at least one second pump body 600 is used to extract the gas in the liquid injection tank 200, and at least one second pump body 600 is used to add gas to the inside of the liquid injection tank 200. When the second pump body 600 extracts gas, the pressure in the liquid injection tank 200 can be effectively reduced, thereby achieving an effect similar to vacuum storage, and thus facilitating the storage of electrolyte. When the second pump body 600 adds gas to the liquid injection tank 200, the liquid injection tank 200 can be pressurized smoothly, so as to facilitate the discharge and injection of electrolyte, and thus the process of injecting liquid into the battery can be completed.

[0033] In certain embodiments, reference Figure 2, the bubble treatment mechanism 300 includes a driving motor 330 and a stirring paddle 370. The stirring paddle 370 rotatably extends into the buffer tank 100. The driving motor 330 is connected to the stirring paddle 370 and can drive it to rotate. After the driving motor 330 is started, it will drive the stirring paddle 370 to rotate in the buffer valve. When the stirring paddle 370 rotates, it will stir the electrolyte in the buffer tank 100, so that the bubbles in the electrolyte can move relative to the electrolyte under the centrifugal force, and then achieve the relative separation effect between the two, so as to facilitate the subsequent further discharge operation of the bubbles.

[0034] It can be envisaged that the bubble treatment mechanism 300 can also be composed of other components. For example, the entire buffer tank 100 can be rotated, so that the electrolyte and bubbles move relative to each other, and the separation effect between the two is achieved. The specific implementation method can be adjusted according to actual needs and will not be limited here.

[0035] In some embodiments, referring to Figure 1 , a pipeline group 700 is provided between the buffer tank 100 and the liquid injection tank 200. The pipeline group 700 is used to guide the fluid to flow into and / or out of the buffer tank 100, and the pipeline group 700 is used to guide the fluid to flow into and / or out of the liquid injection tank 200. The pipeline group 700 can make the process of the electrolyte entering or flowing out of the buffer tank 100 / liquid injection tank 200 more orderly, thereby avoiding the problem of disorder when the electrolyte flows between different tanks.

[0036] In some embodiments, referring to Figure 4 , the pipeline group 700 includes a first connecting pipe 710, a second connecting pipe 720 and a control valve 750. The first connecting pipe 710 communicates with the inside of the buffer tank 100, the second connecting pipe 720 communicates with the inside of the liquid injection tank 200, and the first connecting pipe 710 and the second connecting pipe 720 are connected through the control valve 750. After the electrolyte completes the bubble removal action and is pressurized in the buffer tank 100, the control valve 750 can be started to make the first connecting pipe 710 and the second connecting pipe 720 communicate with each other. Thus, the fluid can enter the liquid injection tank 200 from the buffer tank 100 under the communication effect of the first connecting pipe 710 and the second connecting pipe 720, and then the storage and subsequent liquid injection operation of the electrolyte can be successfully completed.

[0037] In some embodiments, referring to Figure 4, the first connecting pipe 710 is connected to a first three-way pipe 718, and the first three-way pipe 718 is connected to a control valve 750; the first three-way pipe 718 is connected to a first fluid valve 713, and the first fluid valve 713 can control the fluid to enter or leave the buffer tank 100. When it is necessary to load the electrolyte into the buffer tank 100, the control valve 750 can be closed first, and then the electrolyte can be guided to the first three-way pipe 718 through the first fluid valve 713. Thus, the electrolyte will pass through the first fluid valve 713 and enter the buffer tank 100 through the first connecting pipe 710, so as to directly and effectively achieve the effect of storing the electrolyte in the buffer tank 100, and further facilitate the subsequent operation of discharging bubbles therefrom.

[0038] In some embodiments, referring to Figure 4 , the second connecting pipe 720 is connected to a second three-way pipe 728, and the second three-way pipe 728 is connected to a control valve 750; the second three-way pipe 728 is connected to a second fluid valve 723, and the second fluid valve 723 can control the fluid to enter or leave the liquid injection tank 200. When it is necessary to export the electrolyte from the liquid injection tank 200, the control valve 750 can be closed first, and at this time the electrolyte will flow through the second connecting pipe 720 to the second fluid valve 723. Thus, the electrolyte will pass through the second fluid valve 723 and flow to other loading or injection components connected to the second fluid valve 723, so as to directly and effectively achieve the effect of exporting the electrolyte from the liquid injection tank 200, and further facilitate the subsequent operations of storing, transporting or injecting the electrolyte.

[0039] In some embodiments, referring to Figure 1 , a liquid level pipe 800 is provided on the outer wall of the buffer tank 100 and / or the liquid injection tank 200, and a liquid level sensor is provided on the liquid level pipe 800. When the electrolyte is loaded into the buffer tank 100 or the liquid injection tank 200, it will flow in the liquid level pipe 800 together. Therefore, when the liquid level of the electrolyte changes, the liquid level height of the electrolyte relative to the liquid level pipe 800 will also change accordingly, so that the liquid level position can be detected by the liquid level sensor in the liquid level pipe 800, and further facilitate understanding the amount of the electrolyte relative to the buffer tank 100 or the liquid injection tank 200.

[0040] Further, the outer walls of the buffer tank 100 and the liquid injection tank 200 both have a liquid level pipe 800 and a liquid level sensor.

[0041] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0042] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments, and various changes can be made without departing from the gist of the present utility model within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A vacuum liquid injection system, characterized in that, Comprising: A buffer tank (100); A vacuum mechanism (400), connected inside the buffer tank (100), and the vacuum mechanism (400) is used to evacuate the interior of the buffer tank (100); A bubble treatment mechanism (300), connected inside the buffer tank (100), and the bubble treatment mechanism (300) can drive the electrolyte inside the buffer tank (100) to move and cause the bubbles therein to separate from the electrolyte; A liquid injection tank (200), connected to the buffer tank (100), and the buffer tank (100) can convey the electrolyte inside it to the liquid injection tank (200).

2. The vacuum liquid injection system according to claim 1, wherein: The vacuum mechanism (400) includes a first pump body (450) disposed outside the buffer tank (100), the first pump body (450) is connected with a gas transmission pipe (430), and a part of the gas transmission pipe (430) extends into the buffer tank (100).

3. The vacuum liquid injection system according to claim 2, wherein: There are multiple first pump bodies (450), and each first pump body (450) is individually connected with the gas transmission pipe (430) extending into the buffer tank (100); at least one first pump body (450) is used to extract the gas inside the buffer tank (100), and at least one first pump body (450) is used to add gas to the interior of the buffer tank (100).

4. The vacuum liquid injection system according to claim 1, wherein: The liquid injection tank (200) is provided with multiple second pump bodies (600) and all are communicated inside the liquid injection tank (200); at least one second pump body (600) is used to extract the gas inside the liquid injection tank (200), and at least one second pump body (600) is used to add gas to the interior of the liquid injection tank (200).

5. The vacuum liquid injection system according to claim 1, wherein: The bubble treatment mechanism (300) includes a driving motor (330) and a stirring paddle (370), the stirring paddle (370) rotatably extends into the buffer tank (100), and the driving motor (330) is connected to the stirring paddle (370) and can drive it to rotate.

6. The vacuum liquid injection system according to claim 1, wherein: A pipeline group (700) is provided between the buffer tank (100) and the liquid injection tank (200), the pipeline group (700) is used to guide the fluid to flow into and / or out of the buffer tank (100), and the pipeline group (700) is used to guide the fluid to flow into and / or out of the liquid injection tank (200).

7. The vacuum liquid injection system according to claim 6, wherein: The pipeline group (700) includes a first connecting pipe (710), a second connecting pipe (720) and a control valve (750). The first connecting pipe (710) communicates with the inside of the buffer tank (100), the second connecting pipe (720) communicates with the inside of the liquid injection tank (200), and the first connecting pipe (710) and the second connecting pipe (720) are connected through the control valve (750).

8. The vacuum liquid injection system according to claim 7, wherein: The first connecting pipe (710) is connected with a first tee (718), and the first tee (718) is connected with the control valve (750); the first tee (718) is connected with a first fluid valve (713), and the first fluid valve (713) can control the fluid to enter or leave the buffer tank (100).

9. The vacuum liquid injection system according to claim 7, wherein: The second connecting pipe (720) is connected with a second tee (728), and the second tee (728) is connected with the control valve (750); the second tee (728) is connected with a second fluid valve (723), and the second fluid valve (723) can control the fluid to enter or leave the liquid injection tank (200).

10. The vacuum liquid injection system according to claim 1, wherein: A liquid level pipe (800) is provided on the outer wall of the buffer tank (100) and / or the liquid injection tank (200), and a liquid level sensor is provided on the liquid level pipe (800).

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