Negative pressure cup and formation equipment

Abstract

The utility model relates to the technical field of lithium battery formation, in particular to a negative pressure cup and formation equipment. The negative pressure cup is provided with an air source connector used for being connected with a vacuumizing pipeline, the bottom of the negative pressure cup is provided with a liquid drainage connector and a suction nozzle connector which are arranged at intervals, the liquid drainage connector is used for being connected with a liquid drainage pipeline, and the suction nozzle connector is used for being connected with a suction nozzle. According to the negative pressure cup, the negative pressure cup is provided with the air source connector, the liquid drainage connector and the suction nozzle connector are arranged at the bottom of the negative pressure cup, when the negative pressure cup is used, the air source connector can be connected with a vacuumizing pipeline, and the suction nozzle connector and the suction nozzle are connected through the connecting pipe; the vacuumizing pipeline is used for keeping the vacuum degree of the battery cell and sucking away gas generated in the formation process of the battery cell; and the liquid discharging connector can be connected with a liquid discharging pipeline, and after the electrolyte in the battery cell is sucked into the negative pressure cup, the electrolyte in the negative pressure cup can be discharged through the liquid discharging pipeline, so that the electrolyte is prevented from blocking the negative pressure cup, and manpower is liberated.

Description

Technical Field

[0001] This application relates to the field of lithium battery formation technology, and in particular to a negative pressure cup and formation equipment. Background Technology

[0002] The formation process is an important step in the production of square lithium batteries. Its purpose is to activate the batteries. Gas is generated during the formation process. The negative pressure component of the formation equipment is used to draw in the gas generated during formation. During the process of drawing in the gas, electrolyte in the battery may be drawn into the negative pressure cup of the negative pressure component. If the electrolyte remains in the negative pressure cup for a long time, it will cause blockage. This requires maintenance personnel to disassemble the negative pressure component and clear the blockage in the negative pressure cup, which is quite labor-intensive. Utility Model Content

[0003] This application discloses a negative pressure cup and a formation device, which can prevent electrolyte from clogging the negative pressure cup, thereby freeing up manpower.

[0004] To achieve the above objectives, in a first aspect, embodiments of this application disclose a negative pressure cup, which has a gas source connector for connecting to a vacuum pipeline, and the bottom of the negative pressure cup has a drain connector and a suction nozzle connector spaced apart, the drain connector being used to connect to a drain pipeline, and the suction nozzle connector being used to connect to a suction nozzle.

[0005] In one alternative embodiment, the number of the nozzle connectors includes a plurality of nozzle connectors arranged at intervals.

[0006] Secondly, embodiments of this application disclose a formation apparatus, comprising:

[0007] As described in any of the above embodiments, the negative pressure cup can be connected to the battery cell via the suction nozzle connector;

[0008] A vacuum line, the first end of which is connected to a vacuum source, and the second end of which is connected to the gas source connector to extract gas from the negative pressure cup;

[0009] A drain pipe is provided, with a first switch valve connected in series on the drain pipe. The first end of the drain pipe is connected to the vacuum pipe, and the second end of the drain pipe is connected to the drain connector to extract the liquid in the negative pressure cup.

[0010] A liquid collection container, which is connected to the drain pipe to collect liquid transported via the drain pipe.

[0011] In one optional embodiment, the formation apparatus further includes a gas-liquid separator, the gas-liquid separator having an inlet and an outlet connected in series to the vacuum line, and the gas-liquid separator being located between the first end of the drain line and the first end of the vacuum line.

[0012] The liquid collection container has a liquid inlet, which is connected to the liquid outlet of the gas-liquid separator.

[0013] In one alternative embodiment, the formation device further includes a buffer cup connected in series with the drain line.

[0014] In one optional embodiment, the formation apparatus further includes a liquid level detection device disposed in the buffer cup, the liquid level detection device being used to detect the liquid level in the buffer cup.

[0015] In one optional embodiment, the drainage pipeline includes a first pipeline, a second pipeline, and a third pipeline, with one end of the first pipeline connected to the vacuum pipeline and the other end connected to the bottom of the buffer cup;

[0016] One end of the second pipe is connected to the top of the buffer cup, and the other end is connected to the drain connector. One end of the third pipe is connected to the first pipe, and the other end is connected to the top of the buffer cup. A fourth switch valve is connected in series on the third pipe.

[0017] In one alternative embodiment, the formation device further includes a second switching valve connected in series with the vacuum line, and the second switching valve is located between the first end of the drain line and the negative pressure cup.

[0018] In one alternative embodiment, the formation apparatus further includes a third switching valve connected in series with the vacuum line, the third switching valve being located between a first end of the vacuum line and a first end of the drain line.

[0019] In one optional embodiment, the formation equipment further includes a pressure detection device connected in series with the vacuum line and located between the third switching valve and the first end of the drain line.

[0020] In one optional embodiment, the formation device further includes a negative pressure proportional valve connected in series with the vacuum line, the negative pressure proportional valve being located between the pressure detection device and the first end of the vacuum line.

[0021] In one optional embodiment, the number of the negative pressure cup and the drain pipe is at least two, and the vacuum pipe includes a main pipe, a connecting pipe and at least two branch pipes;

[0022] One end of the main pipe is connected to the connecting pipe, and the other end is used to connect to the vacuum source. The two ends of each branch pipe are respectively connected to the connecting pipe and the corresponding negative pressure cup.

[0023] The two ends of the drainage pipe are respectively connected to the corresponding negative pressure cup and the connecting pipe.

[0024] Compared with related technologies, the beneficial effects of this application are:

[0025] In this application, the negative pressure cup has a gas source connector, and the bottom of the negative pressure cup has a drain connector and a suction nozzle connector. When using the negative pressure cup of this application, the gas source connector can be connected to the vacuum pipeline, and the suction nozzle connector and the suction nozzle can be connected through the connecting pipe to maintain the vacuum degree of the battery cell and suck away the gas generated by the battery cell during the formation process through the vacuum pipeline; and the drain connector can also be connected to the drain pipeline. After the electrolyte in the battery cell is sucked into the negative pressure cup, the electrolyte in the negative pressure cup can be discharged through the drain pipeline to prevent the electrolyte from clogging the negative pressure cup, thereby freeing up manpower. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the piping layout of the chemical formation equipment disclosed in the embodiments of this application;

[0028] Figure 2 This is a schematic diagram of the piping layout of a chemical formation device disclosed in another embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the negative pressure cup disclosed in the embodiments of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100. Negative pressure cup; 110. Gas source connector; 120. Drain connector; 130. Suction nozzle connector; 200. Vacuuming pipeline; 210. Main pipeline; 220. Connecting pipeline; 230. Branch pipeline; 300. Drain pipeline; 310. First pipeline; 320. Second pipeline; 330. Third pipeline; 400. Liquid collection container; 500. Gas-liquid separator; 600. Buffer cup; 710. Liquid level detection device; 720. Pressure detection device; 730. Negative pressure proportional valve; 810. First switching valve; 820. Second switching valve; 830. Third switching valve; 900. Suction nozzle. Detailed Implementation

[0032] 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. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0034] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0035] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0036] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0037] The formation process is an important step in the production of square lithium batteries. Its purpose is to activate the batteries. Gas is generated during the formation process. The negative pressure component of the formation equipment is used to draw in the gas generated during formation. During the process of drawing in the gas, electrolyte in the battery may be drawn into the negative pressure cup of the negative pressure component. If the electrolyte remains in the negative pressure cup for a long time, it will cause blockage. This requires maintenance personnel to disassemble the negative pressure component and clear the blockage in the negative pressure cup, which is quite labor-intensive.

[0038] To address the aforementioned issues, this application discloses a negative pressure cup and a formation device that can prevent electrolyte from clogging the negative pressure cup and free up manpower. The formation device provided in this application will be described in detail below with reference to the accompanying drawings and specific embodiments and application scenarios.

[0039] Please see Figure 3 This application discloses a negative pressure cup 100. The negative pressure cup 100 has an air source connector 110 for connecting to a vacuum pipeline 200. The bottom of the negative pressure cup 100 has a drain connector 120 and a suction nozzle connector 130 spaced apart. The drain connector 120 is used to connect to the drain pipeline 300, and the suction nozzle connector 130 is used to connect to a suction nozzle 900. Exemplarily, the air source connector 110 can be located at the top of the negative pressure cup 100.

[0040] Specifically, the air source connector 110, the drain connector 120, and the suction nozzle connector 130 are all connected to the space inside the negative pressure cup 100.

[0041] In this application, the negative pressure cup 100 has a gas source connector 110, and the bottom of the negative pressure cup 100 has a drain connector 120 and a suction nozzle connector 130. When using the negative pressure cup 100 of this application, the gas source connector 110 can be connected to the vacuum pipeline 200, and the suction nozzle connector 130 and the suction nozzle 900 can be connected through the connecting pipe, so as to maintain the vacuum degree of the battery cell and suck away the gas generated by the battery cell during the formation process through the vacuum pipeline 200; and the drain connector 120 can also be connected to the drain pipeline 300. After the electrolyte in the battery cell is sucked into the negative pressure cup 100, the electrolyte in the negative pressure cup 100 can be discharged through the drain pipeline 300 to prevent the electrolyte from clogging the negative pressure cup 100, thereby freeing up manpower.

[0042] In one optional embodiment, the number of suction nozzle connectors 130 includes multiple connectors arranged at intervals. In this embodiment, a negative pressure cup 100 has multiple suction nozzle connectors 130, each connector 130 being connected to a suction nozzle 900, and each suction nozzle 900 being connected to a battery cell. Therefore, this embodiment provides multiple suction nozzle connectors 130 to simultaneously vacuum multiple battery cells, thereby improving production efficiency.

[0043] Please see Figure 1 This application also discloses a formation apparatus, comprising:

[0044] In any of the above embodiments, the negative pressure cup 100 can be connected to the battery cell via the suction nozzle connector 130. The suction nozzle connector 130 can be connected to a negative pressure nozzle via a connecting tube, and the negative pressure nozzle is connected to the battery cell, thereby enabling the negative pressure cup 100 to be connected to the battery cell.

[0045] The vacuum line 200 has a first end connected to a vacuum source and a second end connected to a gas source connector 110 to extract gas from the negative pressure cup 100, thereby maintaining the vacuum level inside the formed battery cell.

[0046] A drain line 300 is provided, with a first switching valve 810 connected in series thereon. The first switching valve 810 controls the opening and closing of the drain line 300. The first end of the drain line 300 is connected to a vacuum line 200, and the second end is connected to a drain connector 120 to extract liquid from the negative pressure cup 100. Specifically, the drain line 300 is connected to a vacuum source via the vacuum line 200, so that when the first switching valve 810 of the drain line 300 is open, the vacuum source can extract liquid from the negative pressure cup 100.

[0047] The liquid collection container 400 is connected to the drain pipe 300 to collect the liquid transported through the drain pipe 300. That is, after the vacuum source draws the liquid in the negative pressure cup 100 to the drain pipe 300, the liquid can be further drawn to the liquid collection container 400 and collected by the liquid collection container 400.

[0048] In this application, one end of the vacuum tube 200 can be connected to a vacuum source, and the other end is connected to a negative pressure cup 100, which is in turn connected to the battery cell. Therefore, the vacuum level of the battery cell can be maintained through the vacuum tube 200, and the gas generated by the battery cell during the formation process can be sucked away. If the electrolyte inside the battery cell is sucked into the negative pressure cup 100 while maintaining the vacuum level of the battery cell using the vacuum tube 200, the first switch valve 810 can be opened, and the electrolyte in the negative pressure cup 100 can be sucked into the collection container 400 using the vacuum source and the drain tube 300 to prevent the electrolyte from clogging the negative pressure cup 100, thereby freeing up manpower.

[0049] Furthermore, the formation equipment of this application can utilize the same vacuum source to maintain the vacuum level of the battery cell and discharge the electrolyte from the negative pressure cup 100, which simplifies the piping structure of the formation equipment and reduces the number of vacuum sources, thereby saving operating costs.

[0050] It should be noted that when the first switch valve 810 is closed to maintain the vacuum level inside the cell using a vacuum source, the vacuum source is in a low negative pressure state; when the first switch valve 810 is open to draw liquid from the negative pressure cup 100 using a vacuum source, the vacuum source is in a high negative pressure state. Here, high negative pressure and low negative pressure are relative terms.

[0051] In an optional embodiment, the formation apparatus further includes a gas-liquid separator 500, whose inlet and outlet are connected in series to a vacuum line 200. The gas-liquid separator 500 is located between the first end of a drain line 300 and the first end of the vacuum line 200. A liquid collection container 400 has an inlet connected to the outlet of the gas-liquid separator 500; that is, the liquid collection container 400 is connected to the drain line 300 via the vacuum line 200. Specifically, the gas-liquid separator 500 separates the gas and liquid phases, allowing the gas to flow out from the outlet and the liquid to flow out from the outlet.

[0052] In this embodiment, when the first switching valve 810 is closed, the vacuum source can draw gas from the battery cell through the vacuum pumping pipe 200, thereby maintaining the battery cell in a vacuum state. Electrolyte gas, i.e., gas containing electrolyte, will evaporate from the battery cell. When the electrolyte gas is drawn into the gas-liquid separator 500, the electrolyte in the electrolyte gas is separated and flows into the collection container 400 for collection. When the first switching valve 810 is open, the vacuum source draws electrolyte into the gas-liquid separator 500 through the vacuum pumping pipe 200 and the drain pipe 300. The electrolyte is separated by the gas-liquid separator 500 and flows into the collection container 400 for collection. Therefore, this embodiment can collect electrolyte not only when the first switching valve 810 is open but also when the first switching valve 810 is closed. This allows the collection container 400 to recover more electrolyte, thereby saving on the operating costs of the formation equipment. Of course, the liquid collection container 400 can also be connected in series with the drain pipe 300. This application does not restrict the location of the liquid collection container 400.

[0053] Normally, the first switch valve 810 will only open to draw liquid from the negative pressure cup 100 when the negative pressure cup 100 is in a waiting state. However, the waiting state is relatively short. Since the pipeline between the negative pressure cup 100 and the liquid collection container 400 is relatively long, it would take a long time to draw the electrolyte directly from the negative pressure cup 100 to the liquid collection container 400. Obviously, this would reduce the efficiency of the formation equipment. Therefore, in an optional embodiment, the formation equipment also includes a buffer cup 600, which is connected in series to the drain pipeline 300.

[0054] In this embodiment, a buffer cup 600 is connected in series to the drain pipe 300. After the first switching valve 810 is opened, the vacuum source can draw the liquid in the negative pressure cup 100 into the buffer cup 600 through the drain pipe 300. Since the pipe length between the buffer cup 600 and the negative pressure cup 100 is relatively short, the time spent drawing the electrolyte into the buffer cup 600 is short, thereby improving the efficiency of the formation equipment. When the negative pressure cup 100 needs to be in a waiting state for a long time, the liquid in the buffer cup 600 can be drawn into the collection container 400 through the vacuum source.

[0055] In an optional embodiment, the formation apparatus further includes a liquid level detection device 710, which is disposed in the buffer cup 600 and is used to detect the liquid level within the buffer cup 600. For example, the liquid level detection device 710 may be a liquid level sensor.

[0056] In this embodiment, the liquid level detection device 710 can detect the liquid level in the buffer cup 600. When the buffer cup 600 is at a high liquid level, it can control the first switching valve 810 to open, drawing the liquid in the buffer cup 600 into the collection container 400 to prevent liquid from overflowing from the container, thereby avoiding environmental pollution and reducing waste. It should be noted that the opening and closing of the first switching valve 810 can be controlled manually or through a control system. In this case, both the liquid level detection device 710 and the first switching valve 810 are electrically connected to the control system of the formation equipment.

[0057] In one optional embodiment, the drain line 300 includes a first pipe 310, a second pipe 320 and a third pipe 330. One end of the first pipe 310 is connected to the vacuum line 200 and the other end is connected to the bottom of the buffer cup 600.

[0058] One end of the second pipe 320 is connected to the top of the buffer cup 600, and the other end is connected to the drain connector 120. One end of the third pipe 330 is connected to the first pipe 310, and the other end is connected to the top of the buffer cup 600. A fourth switch valve is connected in series on the third pipe 330.

[0059] The specific working process of this embodiment is as follows: When the negative pressure cup 100 is in a waiting state for a short period of time, the fourth switch valve can be opened. At this time, the first pipe 310 is connected to the top of the buffer cup 600 through the third pipe 330. The liquid in the negative pressure cup 100 can be drawn into the buffer cup 600 through the first pipe 310, the third pipe 330, and the second pipe 320. When the negative pressure cup 100 is in a waiting state for a long period of time, the fourth switch valve can be closed. At this time, the first pipe 310 is connected to the bottom of the buffer cup 600. The liquid in the buffer cup 600 can be drawn into the storage container through the first pipe 310.

[0060] In a further embodiment, the first switching valve 810 is disposed in the first pipe 310, and the first switching valve 810 is located between the intersection of the first pipe 310 and the third pipe 330 and the buffer cup 600. When the negative pressure cup 100 is in a waiting state for a short time, the fourth switching valve can be opened and the first switching valve 810 can be closed; when the negative pressure cup 100 is in a waiting state for a long time, the fourth switching valve can be closed and the first switching valve 810 can be opened.

[0061] In an optional embodiment, the chemical formation device further includes a second switching valve 820, which is connected in series with the vacuum line 200 and is located between the first end of the drain line 300 and the negative pressure cup 100.

[0062] In this embodiment, the second switching valve 820 can control the opening and closing of the drain pipe 300. When the vacuum source needs to maintain the cell in a vacuum state using the vacuum pipe 200 and the negative pressure cup 100, the first switching valve 810 can be closed and the second switching valve 820 can be opened to maintain the cell in a vacuum state. When it is necessary to suction the liquid in the negative pressure cup 100, the first switching valve 810 can be opened and the second switching valve 820 can be closed. At this time, the section of the vacuum pipe 200 between the first end of the drain pipe 300 and the negative pressure cup 100 will not share the negative pressure of the vacuum source, so that the drain pipe 300 has a large negative pressure suction force to improve the suction effect of the liquid in the negative pressure cup 100.

[0063] In an optional embodiment, the formation device further includes a third switching valve 830, which is connected in series with the vacuum line 200. The third switching valve 830 is located between the first end of the vacuum line 200 and the first end of the drain line 300. That is, the third switching valve 830 is closer to the vacuum source than the first switching valve 810 and the second switching valve 820.

[0064] In this embodiment, the third switching valve 830 is closer to the vacuum source than the first switching valve 810 and the second switching valve 820. In emergencies, such as pipeline leaks or abnormal pressure, closing the third switching valve 830 can quickly cut off the airflow in the relevant path, preventing the problem from worsening. When maintenance or repair of a part of the pipeline system is required, closing the third switching valve 830 can isolate that part, allowing personnel to operate in a safer and more controlled environment.

[0065] It should be noted that the first switching valve 810, the second switching valve 820, the third switching valve 830 and the fourth switching valve mentioned above can all be gate valves, ball valves, butterfly valves, pilot valves, etc. This application does not limit the type of each switching valve.

[0066] In an optional embodiment, the formation apparatus further includes a pressure detection device 720, which is connected in series with the vacuum line 200 and is located between the third switching valve 830 and the first end of the drain line 300.

[0067] Because the vacuum source operates at a low negative pressure when maintaining the vacuum level inside the battery cell, and at a high negative pressure when evacuating liquid from the negative pressure cup 100, the negative pressure of the vacuum source varies depending on the operating conditions of the negative pressure cup 100. To detect whether the negative pressure applied by the vacuum source meets the requirements of different operating conditions, this embodiment includes a pressure detection device 720 on the vacuum pipeline 200. The pressure detection device 720 can detect the negative pressure applied by the vacuum source. If the detected negative pressure does not meet the requirements of the current operating condition, the negative pressure applied by the vacuum source can be adjusted in a timely manner to ensure that the negative pressure meets the requirements. It should be noted that the negative pressure of the vacuum source can be adjusted manually or through the control system. In this case, the pressure detection device 720 needs to be electrically connected to the control system.

[0068] In an optional embodiment, the formation apparatus further includes a negative pressure proportional valve 730, which is connected in series with the vacuum line 200 and is located between the pressure detection device 720 and the first end of the vacuum line 200.

[0069] In this embodiment, the negative pressure proportional valve 730 can infinitely adjust the magnitude of the negative pressure, thus avoiding energy waste caused by excessive or insufficient negative pressure. Furthermore, because the negative pressure proportional valve 730 can accurately and quickly control the negative pressure, the production efficiency of the chemical formation equipment can be improved.

[0070] In one alternative embodiment, please refer to Figure 2 The number of negative pressure cups 100 and drainage pipes 300 is at least two. The vacuum pipe 200 includes a main pipe 210, a connecting pipe 220 and at least two branch pipes 230. One end of the main pipe 210 is connected to the connecting pipe 220 and the other end is used to connect to the vacuum source. The two ends of each branch pipe 230 are connected to the connecting pipe 220 and the corresponding negative pressure cup 100, respectively. The two ends of the drainage pipe 300 are connected to the corresponding negative pressure cup 100 and the connecting pipe 220, respectively.

[0071] In this embodiment, the vacuum pipeline 200 includes a main pipeline 210, a connecting pipeline 220, and at least two branch pipelines 230. The two ends of the main pipeline 210 are connected to a vacuum source and the connecting pipeline 220, respectively. The two ends of each branch pipeline 230 are connected to the connecting pipeline 220 and the negative pressure cup 100, respectively. That is, each negative pressure cup 100 is connected to the same vacuum source through the vacuum pipeline 200. The same vacuum source can be used to evacuate each negative pressure cup 100. Compared with the embodiment of "using at least two vacuum sources to evacuate at least two negative pressure cups 100 respectively", this embodiment can reduce the number of vacuum sources and simplify the pipeline structure, thereby reducing the manufacturing cost of the formation equipment.

[0072] The foregoing embodiments of this application focus on describing the differences between various embodiments. As long as the different optimization features between embodiments are not contradictory, they can be combined to form better embodiments. For the sake of brevity, these differences will not be elaborated upon here. The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art, under the guidance of this application, can make many modifications without departing from the spirit and scope of the claims, all of which fall within the protection scope of this application.

Claims

1. A negative pressure cup, characterized in that, The negative pressure cup (100) has a gas source connector (110) for connecting to the vacuum line (200). The bottom of the negative pressure cup (100) has a drain connector (120) and a suction nozzle connector (130) spaced apart. The drain connector (120) is used to connect to the drain line (300), and the suction nozzle connector (130) is used to connect to the suction nozzle (900).

2. The negative pressure cup (100) according to claim 1, characterized in that, The number of the suction nozzle connectors (130) includes a plurality of them, and the plurality of suction nozzle connectors (130) are arranged at intervals.

3. A chemical formation device, characterized in that, include: The negative pressure cup (100) as described in claim 1 or 2 is capable of being connected to the battery cell via the suction nozzle connector (130); A vacuum line (200) is provided, the first end of which is connected to a vacuum source and the second end of which is connected to the gas source connector (110) to extract gas from the negative pressure cup (100). A drain pipe (300) is provided, on which a first switching valve (810) is connected in series. The first end of the drain pipe (300) is connected to the vacuum pipe (200), and the second end of the drain pipe (300) is connected to the drain connector (120) to extract liquid from the negative pressure cup (100). A liquid collection container (400) is connected to the drain line (300) to collect liquid transported via the drain line (300).

4. The chemical formation equipment according to claim 3, characterized in that, The chemical formation equipment also includes a gas-liquid separator (500), the gas inlet and the gas outlet of the gas-liquid separator (500) are connected in series to the vacuum line (200), and the gas-liquid separator (500) is located between the first end of the drain line (300) and the first end of the vacuum line (200). The liquid collection container (400) has a liquid inlet, which is connected to the liquid outlet of the gas-liquid separator (500).

5. The chemical formation equipment according to claim 4, characterized in that, The formation device also includes a buffer cup (600), which is connected in series to the drain line (300).

6. The chemical formation equipment according to claim 5, characterized in that, The formation equipment also includes a liquid level detection device (710), which is located in the buffer cup (600) and is used to detect the liquid level in the buffer cup (600).

7. The chemical formation equipment according to claim 5, characterized in that, The drain pipe (300) includes a first pipe (310), a second pipe (320) and a third pipe (330). One end of the first pipe (310) is connected to the vacuum pipe (200), and the other end is connected to the bottom of the buffer cup (600). One end of the second pipe (320) is connected to the top of the buffer cup (600), and the other end is connected to the drain connector (120). One end of the third pipe (330) is connected to the first pipe (310), and the other end is connected to the top of the buffer cup (600). A fourth switch valve is connected in series on the third pipe (330).

8. The chemical formation equipment according to claim 3, characterized in that, The chemical formation equipment also includes a second switching valve (820), which is connected in series with the vacuum line (200) and is located between the first end of the drain line (300) and the negative pressure cup (100).

9. The chemical formation equipment according to claim 8, characterized in that, The chemical formation equipment also includes a third switching valve (830), which is connected in series with the vacuum line (200) and is located between the first end of the vacuum line (200) and the first end of the drain line (300).

10. The chemical formation apparatus according to claim 9, characterized in that, The chemical formation equipment also includes a pressure detection device (720), which is connected in series with the vacuum line (200) and is located between the third switching valve (830) and the first end of the drain line (300).

11. The chemical formation apparatus according to claim 10, characterized in that, The chemical formation equipment also includes a negative pressure proportional valve (730), which is connected in series with the vacuum line (200) and is located between the pressure detection device (720) and the first end of the vacuum line (200).

12. The chemical formation equipment according to claim 3, characterized in that, The number of the negative pressure cup (100) and the drain pipe (300) is at least two, and the vacuum pipe (200) includes a main pipe (210), a connecting pipe (220) and at least two branch pipes (230); One end of the main pipe (210) is connected to the connecting pipe (220), and the other end is used to connect to the vacuum source. The two ends of each branch pipe (230) are respectively connected to the connecting pipe (220) and the corresponding negative pressure cup (100). The two ends of the drain pipe (300) are respectively connected to the corresponding negative pressure cup (100) and the connecting pipe (220).

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