Storage device

Abstract

The utility model relates to a storage device which comprises a vacuum tank, a vacuum pump and a switch assembly, the vacuum tank is provided with a vacuum inner cavity used for storing media, the vacuum tank further comprises a second hole part and a third hole part, one of the second hole part and the third hole part is connected with a liquid supply device through a first pipeline, and the other one of the second hole part and the third hole part is connected with the vacuum pump through a second pipeline; the first pipeline at least comprises a first pipe body and a second pipe body, the first pipe body and the second pipe body are connected through a switch assembly, the end, away from the switch assembly, of the first pipe body communicates with the vacuum tank, the end, away from the switch assembly, of the second pipe body is used for communicating with a liquid supply device, and the switch assembly can conduct or cut off the first pipeline. The quantity of the medium pumped by the vacuum tank is accurately controlled, and the risk that the battery cell is damaged and the electrolyte in the battery cell is pumped out due to continuous pumping of the vacuum tank under the action of negative pressure is reduced, so that the controllability of the quantity of the electrolyte reserved in the battery cell is improved, and the performance of the battery cell and the lithium battery is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of lithium batteries, in particular to a storage device. BACKGROUND

[0002] In the processing of lithium batteries, especially in the process of injecting electrolyte into the battery cell and the process of battery cell aging test, the waste liquid needs to be stored by a storage device. For example, in the process of injecting electrolyte into the battery cell, the overflowed electrolyte is collected by a storage device, and then the electrolyte in the storage device is discharged into the storage device for secondary use of the electrolyte; in the process of battery cell aging test, the test medium in the test device can be discharged into the storage device for secondary use of the test medium.

[0003] Generally, the storage device includes a vacuum tank, a vacuum pump connected with the vacuum tank, and a liquid supply device connected with the vacuum tank, the liquid supply device can be understood as the above-mentioned storage device and test device, the vacuum pump performs vacuumizing operation on the vacuum tank, under the action of negative pressure in the vacuum tank, the storage device automatically sucks the electrolyte in the liquid supply device into the inside of the vacuum tank, the existing storage device cannot stop the extraction of the electrolyte by the storage device in time, and in the process of injecting electrolyte into the battery cell and aging test, there is a risk of excessive extraction leading to loss of electrolyte in the battery cell, so that the amount of electrolyte remaining in the battery cell cannot be controlled, and the performance of the battery cell is affected. CONTENT OF THE UTILITY MODEL

[0004] The application relates to a storage device which can timely start or stop the extraction of the medium by the storage device, so as to reduce the risk of loss of electrolyte in the battery cell and improve the performance of the battery cell.

[0005] The application provides a storage device, which comprises a vacuum tank, a vacuum pump and a switch assembly, the vacuum tank has a vacuum inner cavity for storing a medium, the vacuum tank has a first hole part for discharging the medium in the vacuum inner cavity; the vacuum pump is used for extracting the vacuum inner cavity to a vacuum state, the vacuum tank further comprises a second hole part and a third hole part, one of the second hole part and the third hole part is connected with a liquid supply device through a first pipeline, and the other is connected with the vacuum pump through a second pipeline; the first pipeline at least comprises a first pipe body and a second pipe body, the first pipe body and the second pipe body are connected through the switch assembly, one end of the first pipe body away from the switch assembly is in communication with the vacuum tank, one end of the second pipe body away from the switch assembly is used for being in communication with the liquid supply device, and the switch assembly can conduct or block the first pipeline.

[0006] In the application, the switch assembly is added between the vacuum tank and the liquid supply device, and the vacuum tank starts or stops extracting the medium by being turned on or turned off, thereby improving the controllability of the vacuum tank on the medium extraction, facilitating the accurate control of the amount of the medium extracted by the vacuum tank, reducing the risk of the continuous extraction of the medium under the negative pressure of the vacuum tank, thereby improving the controllability of the amount of the electrolyte reserved in the battery cell, and further improving the performance of the battery cell and the lithium battery.

[0007] In a possible design, the switch assembly includes a switch body, the switch body has a cavity, a first opening, a second opening and a partition plate, the partition plate divides the cavity into a first cavity and a second cavity, the first pipe body communicates with the first cavity through the first opening, and the second pipe body communicates with the second cavity through the second opening; the partition plate has a through hole, and the first cavity and the second cavity communicate through the through hole; the switch assembly further includes a driving member and a blocking member, the driving member is installed on the switch body, the blocking member is located in the cavity and is oppositely arranged with the through hole in the extension direction of the through hole, the driving member is in driving connection with the blocking member, and the driving member can drive the blocking member to move towards or away from the through hole in the extension direction of the through hole to block or open the through hole.

[0008] In a possible design, the partition plate has a bending structure, and the contour of the bending structure includes L-shaped, U-shaped or

[0009] In a possible design, the switch body includes a body part and an extension part, the cavity is arranged in the body part, in the extension direction of the through hole, one end of the extension part is connected with the body part, the other end of the extension part extends away from the cavity, the extension part has a hole channel extending in the extension direction of the through hole, and the hole channel communicates with the cavity; the blocking member includes a blocking body and a connecting part, one end of the connecting part is connected with the blocking body, in the extension direction of the through hole, the other end of the connecting part extends to outside the switch body through the hole channel and is in driving connection with the driving member.

[0010] In a possible design, the switch body further includes a mounting part, in the extension direction of the through hole, the mounting part is located on the side of the extension part away from the body part, the driving member is installed on the mounting part, and the driving member is in sealed connection with the mounting part; in the extension direction of the through hole, the projection of the extension part is located in the projection contour of the mounting part.

[0011] In a possible design, the storage device further includes a control system, the control system is electrically connected or signal-connected with the switch assembly, and the control system can turn on or turn off the switch assembly according to the state of the liquid supply device.

[0012] In a possible design, the storage device further includes an adjusting valve, the adjusting valve is arranged on the first pipeline, and the adjusting valve is used for adjusting the flow rate of the medium; the adjusting valve is an electromagnetic valve or a manual valve.

[0013] In a possible design, the vacuum tank is provided with a pressure relief hole, the pressure relief hole is in communication with the vacuum inner cavity; the storage device further includes a pressure relief valve, the pressure relief valve is installed in the pressure relief hole, and the pressure relief valve can open or block the pressure relief hole.

[0014] In a possible design, the storage device further includes a filter, the filter is located in the vacuum inner cavity, and the filter is installed at at least one of the first hole part, the second hole part and the third hole part.

[0015] In a possible design, the number of the second hole parts is not less than two, and / or the number of the third hole parts is not less than two.

[0016] It should be understood that the foregoing general description and the following detailed description are only examples, and are not limiting to the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A structure schematic diagram of the liquid storage device provided in the present application in an embodiment;

[0018] Figure 2 A structure schematic diagram of the liquid storage device provided in the present application in another embodiment;

[0019] Figure 3 A structure schematic diagram of the switch assembly provided in the present application in an embodiment;

[0020] Figure 4 A sectional view of Figure 3 ;

[0021] Figure 5 A structure schematic diagram of the switch body in Figure 3 in an embodiment;

[0022] Figure 6 A sectional view of Figure 5 ;

[0023] Figure 7 A connection position schematic diagram of the filter provided in the present application in an embodiment.

[0024] Reference Signs:

[0025] 01-liquid supply device; 1-vacuum tank; 11-first hole part; 12-second hole part; 13-third hole part; 14-pressure relief hole; 15-tray; 16-wheel; 17-pushing handle; 2-first pipeline; 21-first pipe body; 22-second pipe body; 23-third pipe body; 3-vacuum pump; 4-second pipeline; 5-switch assembly; 51-switch body; 511-cavity; 511a-first cavity; 511b-second cavity; 512-first opening; 513-second opening; 514-body part; 515-extension part; 515a-hole channel; 516-mounting part; 52-baffle; 521-through hole; 53-driving member; 54-blocking member; 541-blocking body; 542-connection part; 6-regulating valve; 7-pressure relief valve; 8-filtering member.

[0026] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application. DETAILED DESCRIPTION

[0027] For a better understanding of the technical solutions of the present application, the embodiments of the present application are described in detail below with reference to the drawings.

[0028] It should be clear that the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0029] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0030] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0031] It should be noted that the "up", "down", "left", "right" and other directional words described in the embodiments of the present application are described from the angle shown in the drawings, and should not be understood as a limitation on the embodiments of the present application. In addition, in the context, it should also be understood that when referring to an element connected to another element "on" or "under", it can not only be directly connected to another element "on" or "under", but also indirectly connected to another element "on" or "under" through an intermediate element.

[0032] This application provides a storage device, such as... Figure 1 As shown, the storage device includes a vacuum tank 1, which has a vacuum cavity for storing the medium. During the process of injecting electrolyte into the battery cell, the medium is the overflowing electrolyte. Storing the electrolyte in the storage device facilitates its reuse, thereby reducing the processing cost of the battery cell and lithium battery. During the battery cell aging test, the medium is the test liquid within the testing device. Storing the test liquid in the storage device facilitates its reuse, thus reducing the testing cost of the battery cell.

[0033] In this embodiment, the vacuum tank 1 is first evacuated to a vacuum by the vacuum pump 3, and then the medium is extracted by the negative pressure inside the vacuum tank 1. The vacuum tank 1 plays the role of negative pressure storage. During the extraction of the medium, even if the vacuum pump 3 stops working, the vacuum tank 1 can still extract the medium under the action of internal negative pressure, which reduces the risk that the entire storage device will not work properly if the vacuum pump 3 stops working, thereby improving the stability of the storage device in extracting the medium.

[0034] Among them, such as Figure 1 As shown, the vacuum tank 1 has a first orifice 11, which is used to discharge the medium in the vacuum cavity to facilitate subsequent operations such as filtration, purification, processing, and use of the medium.

[0035] like Figure 1 As shown, the storage device also includes a vacuum pump 3, which is used to evacuate the vacuum chamber to a vacuum state. The vacuum tank 1 also includes a second hole 12 and a third hole 13. One of the second hole 12 and the third hole 13 is connected to the liquid supply device 01 through the first pipeline 2, and the other is connected to the vacuum pump 3 through the second pipeline 4.

[0036] In this embodiment, the vacuum pump 3 evacuates the inner cavity to a vacuum state, facilitating the entry of the medium into the vacuum tank 1 and reducing the difficulty of collecting the medium in the storage device. Furthermore, when the medium is an electrolyte, evacuating the vacuum tank 1 to a vacuum reduces the risk that the electrolyte will react chemically with the air during storage in the vacuum tank 1, leading to electrolyte failure and rendering it unusable.

[0037] Specifically, such as Figure 1As shown, the first pipeline 2 at least includes a first pipe body 21 and a second pipe body 22, and the storage device further includes a switch assembly 5, the first pipe body 21 and the second pipe body 22 are connected through the switch assembly 5, one end of the first pipe body 21 away from the switch assembly 5 is communicated with the vacuum tank 1, and one end of the second pipe body 22 away from the switch assembly 5 is used for being communicated with the liquid supply device 01 of the previous process, and the switch assembly 5 can conduct or block the first pipeline 2. Wherein, in the process of injecting the electrolyte into the battery cell, the liquid supply device 01 can be a collection device for collecting the overflowed electrolyte, in the process of battery cell aging test, the liquid supply device 01 is a test device, or the liquid supply device 01 is a filtering device connected with the test device.

[0038] In the embodiment, the switch assembly 5 is added between the vacuum tank 1 and the liquid supply device 01, the vacuum tank 1 can be started or stopped to extract the medium by opening or closing the switch assembly 5, the controllability of the vacuum tank 1 to extract the medium is improved, so as to accurately control the amount of the medium extracted by the vacuum tank 1, and the risk that the battery cell is damaged and the electrolyte in the battery cell is extracted due to the continuous extraction of the vacuum tank 1 under the negative pressure is reduced, thereby the controllability of the amount of the electrolyte reserved in the battery cell is improved, and the performance of the battery cell and the lithium battery is improved.

[0039] The switch assembly 5 is added between the vacuum tank 1 and the liquid supply device 01, the switch assembly 5 can be closed before the liquid supply device 01 discharges the medium and the storage device extracts the medium, and the vacuum tank 1 is extracted to vacuum by the vacuum pump 3, at this time, the vacuum tank 1 is used for storing vacuum, when the liquid supply device 01 starts to discharge the medium, the switch assembly 5 is opened, and the medium can be quickly extracted, that is, the vacuum tank 1 can be extracted to vacuum in advance by setting the switch assembly 5, so that the working period of the storage device is shortened.

[0040] Wherein, one of the second hole part 12 and the third hole part 13 is connected with the liquid supply device 01 through the first pipeline 2, and the other is connected with the vacuum pump 3 through the second pipeline 4. Specifically, in one embodiment, as shown in Figure 1 The second hole part 12 is communicated with the liquid supply device 01 through the first pipeline 2, and the third hole part 13 is communicated with the vacuum pump 3 through the second pipeline 4. In another embodiment, as shown in Figure 1 The second hole part 12 is communicated with the vacuum pump 3 through the second pipeline 4, and the third hole part 13 is communicated with the liquid supply device 01 through the first pipeline 2. The specific connection mode of the second hole part 12, the third hole part 13, the liquid supply device 01 and the vacuum pump 3 is not specially limited in the embodiment of the application.

[0041] As shown in Figures 3 to 6As shown, the switch assembly 5 comprises a switch body 51 having a cavity 511, a first opening 512, a second opening 513, and a partition plate 52 separating the cavity 511 into a first cavity 511a and a second cavity 511b, the first pipe body 21 being in communication with the first cavity 511a through the first opening 512, and the second pipe body 22 being in communication with the second cavity 511b through the second opening 513; the partition plate 52 has a through hole 521, and the first cavity 511a and the second cavity 511b are in communication through the through hole 521; the switch assembly 5 further comprises a driving member 53 and a blocking member 54, the driving member 53 being installed on the switch body 51, and the blocking member 54 being located in the cavity 511, the driving member 53 being in driving connection with the blocking member 54, and being capable of driving the blocking member 54 to move towards or away from the through hole 521 along the extension direction Z of the through hole 521, for example, along the height direction of the storage device, so as to block or open the through hole 521.

[0042] In the embodiment, the opening or closing of the switch assembly 5 is realized by opening or blocking the through hole 521 on the partition plate 52, which simplifies the structure of the switch assembly 5 and reduces the cost of the switch assembly 5. The through hole 521 is blocked or opened by controlling the blocking member 54 to move along the extension direction Z of the through hole 521, so as to realize the closing or opening of the switch assembly 5, which reduces the difficulty of opening or closing the switch assembly 5, thereby being conducive to shortening the period of state switching of the switch assembly 5, and further improving the control precision of the switch assembly 5 on the amount of medium drawn by the vacuum tank 1.

[0043] In the embodiment, the opening or closing of the switch assembly 5 is realized by opening or blocking the through hole 521 on the partition plate 52, which simplifies the structure of the switch assembly 5 and reduces the cost of the switch assembly 5. The through hole 521 is blocked or opened by controlling the blocking member 54 to move along the extension direction Z of the through hole 521, so as to realize the closing or opening of the switch assembly 5, which reduces the difficulty of opening or closing the switch assembly 5, thereby being conducive to shortening the period of state switching of the switch assembly 5, and further improving the control precision of the switch assembly 5 on the amount of medium drawn by the vacuum tank 1.

[0044] In addition, the partition plate 52 can be separately provided from the switch body 51 and fixed on the switch body 51 in the form of welding, bonding, riveting, clamping, fastener connection, etc.; or the partition plate 52 is integrally formed with the switch body 51. The connection mode of the partition plate 52 and the switch body 51 is not specially limited in the embodiment.

[0045] As shown in FIG. 1, the switch assembly 5 is in the closed state, and the through hole 521 is blocked by the blocking member 54. Figures 3 to 6As shown, the switch body 51 comprises a body portion 514 and an extension portion 515, the cavity 511 is arranged in the body portion 514, and along the extension direction Z of the through hole 521, one end of the extension portion 515 is connected with the body portion 514, and the other end of the extension portion 515 extends away from the cavity 511, the extension portion 515 has a hole 515a extending along the extension direction Z of the through hole 521, and the hole 515a is communicated with the cavity 511; the blocking member 54 comprises a blocking body 541 and a connecting portion 542, one end of the connecting portion 542 is connected with the blocking body 541, and along the extension direction Z of the through hole 521, the other end of the connecting portion 542 extends to the outside of the switch body 51 through the hole 515a and is drivingly connected with the driving member 53.

[0046] It can be understood that the hole 515a is communicated with the cavity 511, and the hole 515a can be communicated with the first cavity 511a of the cavity 511 (for example, as shown in Figure 4 and Figure 6 of course, the hole 515a can be communicated with the second cavity 511b of the cavity 511, and the specific communication mode can be determined according to the separation mode of the partition plate 52 to the first cavity 511a and the second cavity 511b.

[0047] In the embodiment, the driving member 53 is arranged outside the switch body 51, which is beneficial to reduce the size of the switch body 51, reduce the cost of the switch body 51 and the switch assembly 5, and increase the installation space of the driving member 53, thereby reducing the installation difficulty of the driving member 53. The extension portion 515 is arranged, and a part of the blocking member 54 passes through the extension portion 515 and is connected with the driving member 53 outside, which increases the size of the blocking member 54 in the extension direction Z of the through hole 521, thereby reducing the processing difficulty of the blocking member 54, and further reducing the processing cost of the blocking member 54.

[0048] The blocking body 541 and the connecting portion 542 can be connected into an L shape, a T shape or other deformed structures, and the profile shape of the blocking member 54 is not specially limited in the embodiment.

[0049] As shown in Figure 5 and Figure 6 the switch body 51 further comprises a mounting portion 516, and along the extension direction Z of the through hole 521, the mounting portion 516 is located on the side of the extension portion 515 away from the body portion 514, the driving member 53 is mounted on the mounting portion 516, and the driving member 53 is sealingly connected with the mounting portion 516; in the extension direction Z of the through hole 521, the projection of the extension portion 515 is located in the projection profile of the mounting portion 516.

[0050] In the embodiment, the driving member 53 is mounted on the larger mounting portion 516, which reduces the connection difficulty of the driving member 53 and the switch body 51, thereby facilitating the shortening of the assembly cycle of the switch assembly 5. The driving member 53 and the mounting portion 516 are in sealed connection, which reduces the risk of a gap between the driving member 53 and the mounting portion 516 and reduces the risk of the vacuum inner cavity of the vacuum tank 1 being connected with the outside through the gap, thereby reducing the risk of the reduced negative pressure in the vacuum inner cavity causing the reduced rate of the vacuum tank 1 in extracting the medium and further improving the stability and reliability of the vacuum tank 1 in extracting the medium.

[0051] The opening or closing of the switch assembly 5 can be manually performed by an operator. That is, the operator manually opens or closes the control member, thereby realizing the opening or closing of the switch assembly 5.

[0052] In another embodiment, the storage device further comprises a control system, which is electrically or signal connected with the switch assembly 5, and the control system can open or close the switch assembly 5 according to the state of the liquid supply device 01.

[0053] In the embodiment, the control system can automatically open or close the switch assembly 5 according to the amount of medium in the liquid supply device 01, the working state of the liquid supply device 01 and other parameters, thereby further improving the accuracy of the control of the opening or closing of the switch assembly 5 and further improving the accuracy of the amount of medium extracted by the vacuum tank 1.

[0054] As shown in Figure 1 and Figure 2 , the storage device further comprises an adjusting valve 6, which is arranged on the first pipeline 2 and is used to adjust the flow rate of the medium. Specifically, as shown in Figure 1 and Figure 2 , the first pipeline 2 further comprises a third pipe body 23, the second pipe body 22 and the third pipe body 23 are connected through the adjusting valve 6, one end of the second pipe body 22 away from the adjusting valve 6 is connected with the switch assembly 5, and one end of the third pipe body 23 away from the adjusting valve 6 is connected with the liquid supply device 01.

[0055] In the embodiment, when the amount of medium extracted by the vacuum tank 1 approaches the threshold value, the flow rate of the medium in the first pipeline 2 can be reduced through the adjusting valve 6, and when the amount of medium in the vacuum tank 1 reaches the threshold value, the control system closes the switch assembly 5. During the process from the amount of medium reaching the threshold value to the control system closing the switch assembly 5, the flow rate of the medium is low, so that the amount of medium extracted into the vacuum tank 1 in this period of time is small, so that the difference between the actual amount of medium in the vacuum tank 1 and the theoretical amount of medium is small, thereby improving the control accuracy of the amount of medium extracted by the vacuum tank 1.

[0056] The adjusting valve 6 is an electromagnetic valve or a manual valve, and the type and structure of the adjusting valve 6 are not specially limited in the embodiment.

[0057] As shown in Figure 1 and Figure 2 , the vacuum tank 1 is provided with a pressure relief hole 14, which is in communication with the vacuum cavity; the storage device further comprises a pressure relief valve 7 installed in the pressure relief hole 14, which can open or block the pressure relief hole 14.

[0058] In this embodiment, when the parts inside the vacuum tank 1 need to be maintained, or the vacuum tank 1 needs to be cleaned, the pressure relief hole 14 can be opened first, so that the negative pressure in the vacuum tank 1 disappears, thereby reducing the difficulty of opening the vacuum tank 1.

[0059] As shown in Figure 1 , Figure 2 and Figure 7 , the storage device further comprises a filter 8, which is located in the vacuum cavity, and at least one of the first hole part 11, the second hole part 12 and the third hole part 13 is provided with the filter 8.

[0060] In this embodiment, taking the structure shown in Figure 2 as an example, when the filter 8 is installed in the second hole part 12, the filter 8 is used to filter the air in the vacuum cavity, reducing the risk of impurities in the air being extracted by the vacuum pump 3, thereby reducing the risk of damage to the vacuum pump 3, prolonging the service life of the vacuum pump 3, and improving the working stability of the vacuum pump 3. When the filter 8 is installed in the third hole part 13, the filter 8 is used to filter the medium, which can reduce the impurities in the medium in the vacuum tank 1, thereby improving the quality of the medium in the vacuum tank 1. In addition, the filter 8 can also be installed in the first hole part 11, which can reduce the impurities in the medium discharged from the vacuum tank 1, thereby improving the quality of the medium discharged from the vacuum tank 1, and reducing the difficulty of subsequent filtering, processing and use of the medium.

[0061] Based on the storage device in any of the above embodiments, the number of first hole parts 11 can be one or not less than two. When the number of first hole parts 11 is more than one, the rate at which the storage device discharges the medium can be improved.

[0062] The number of second hole parts 12 can be one or not less than two, and the number of third hole parts 13 can be one or not less than two, thereby facilitating the improvement of the rate of vacuum extraction and medium extraction, and thereby improving the working efficiency of the storage device.

[0063] As shown in Figure 1 and Figure 2As shown, the vacuum tank 1 is further provided with a tray 15, which is located below the first hole part 11 along the height direction of the vacuum tank 1. When the medium is discharged from the first hole part 11, the tray 15 can collect part of the overflowing and dripping medium, reduce the risk of medium pollution to the environment, and the medium in the tray 15 can also be used for secondary use, thereby reducing the loss of the medium.

[0064] As shown in Figure 1 and Figure 2 As shown, the vacuum tank 1 is further provided with wheels 16 and a push hand 17 to facilitate the transportation of the storage device.

[0065] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A storage device, characterized by, The storage device comprises: a vacuum tank (1) having a vacuum inner cavity for storing medium, the vacuum tank (1) having a first hole portion (11) for discharging the medium in the vacuum inner cavity; a vacuum pump (3) for pumping the vacuum inner cavity to a vacuum state, the vacuum tank (1) further comprising a second hole portion (12) and a third hole portion (13), one of the second hole portion (12) and the third hole portion (13) being connected with a liquid supply device (01) through a first pipeline (2), and the other being connected with the vacuum pump (3) through a second pipeline (4); the first pipeline (2) at least comprising a first pipe body (21) and a second pipe body (22), the storage device further comprising a switch assembly (5), the first pipe body (21) and the second pipe body (22) being connected through the switch assembly (5), one end of the first pipe body (21) away from the switch assembly (5) being in communication with the vacuum tank (1), and one end of the second pipe body (22) away from the switch assembly (5) being used for communication with the liquid supply device (01), the switch assembly (5) being capable of conducting or blocking the first pipeline (2).

2. The storage device of claim 1, wherein, the switch assembly (5) comprising a switch body (51) having a cavity (511), a first opening (512), a second opening (513) and a partition plate (52), the partition plate (52) dividing the cavity (511) into a first cavity (511a) and a second cavity (511b), the first pipe body (21) being in communication with the first cavity (511a) through the first opening (512), and the second pipe body (22) being in communication with the second cavity (511b) through the second opening (513); the partition plate (52) having a through hole (521), the first cavity (511a) and the second cavity (511b) being in communication through the through hole (521); the switch assembly (5) further comprising a driving member (53) and a blocking member (54), the driving member (53) being installed on the switch body (51), the blocking member (54) being located in the cavity (511) and oppositely arranged with the through hole (521) in the extension direction (Z) of the through hole (521), the driving member (53) being in driving connection with the blocking member (54), the driving member (53) being capable of driving the blocking member (54) to approach or move away from the through hole (521) in the extension direction (Z) of the through hole (521) to block or open the through hole (521).

3. The storage device of claim 2, wherein, the partition plate (52) having a bending structure, the profile shape of the bending structure comprising an L shape, a U shape or a Z shape.

4. The storage device of claim 2, wherein, The switch body (51) comprises a body part (514) and an extension part (515), the cavity (511) is arranged in the body part (514), and one end of the extension part (515) is connected with the body part (514) along the extension direction (Z) of the through hole (521), the other end of the extension part (515) extends away from the cavity (511), and the extension part (515) has a hole (515a) extending along the extension direction (Z) of the through hole (521), and the hole (515a) communicates with the cavity (511); The blocking piece (54) comprises a blocking body (541) and a connecting part (542), one end of the connecting part (542) is connected with the blocking body (541), and the other end of the connecting part (542) extends to the outside of the switch body (51) through the hole (515a) and is drivingly connected with the driving piece (53) along the extension direction (Z) of the through hole (521).

5. The storage device of claim 4, wherein, The switch body (51) further comprises a mounting part (516), which is located on the side of the extension part (515) away from the body part (514) along the extension direction (Z) of the through hole (521), and the driving piece (53) is mounted on the mounting part (516), and the driving piece (53) is sealingly connected with the mounting part (516); In the extension direction (Z) of the through hole (521), the projection of the extension part (515) is located within the projection outline of the mounting part (516).

6. The storage device of any one of claims 1 to 5, wherein, The storage device further comprises a control system, which is electrically or signal connected with the switch assembly (5), and the control system can open or close the switch assembly (5) according to the state of the liquid supply device (01).

7. The storage device of any one of claims 1 to 5, wherein, The storage device further comprises an adjusting valve (6), which is arranged on the first pipeline (2) and used for adjusting the flow rate of the medium. The adjusting valve (6) is an electromagnetic valve or a manual valve.

8. The storage device of any one of claims 1 to 5, wherein, The vacuum tank (1) is provided with a pressure relief hole (14) which communicates with the vacuum inner cavity. The storage device further comprises a pressure relief valve (7) which is mounted on the pressure relief hole (14) and can open or block the pressure relief hole (14).

9. The storage device of any one of claims 1 to 6, wherein, The storage device further comprises a filter (8) which is arranged in the vacuum inner cavity, and the filter (8) is arranged at least one of the first hole part (11), the second hole part (12) and the third hole part (13).

10. The storage device of any one of claims 1 to 6, wherein, The number of the second hole part (12) is not less than two, and / or the number of the third hole part (13) is not less than two.

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