Liquid injection equipment and its control method

Abstract

This application provides a liquid injection device and its control method, relating to the field of liquid injection device technology. The liquid injection device includes: an injection assembly, a cleaning fluid assembly, a drive assembly, and a switching assembly. The injection assembly includes an electrolyte tank and multiple injection plates, each with a connected injection pipe and injection needle. The cleaning fluid assembly includes a cleaning fluid tank, a cleaning fluid pipeline, and a residual liquid tank, with one end of the cleaning fluid pipeline connected to the cleaning fluid tank. The switching assembly switches the injection plates between an injection state and a cleaning state. In the cleaning state, the injection pipe is connected to the residual liquid tank. The drive assembly connects the other end of the cleaning fluid pipeline to the injection needle in the cleaning state. Therefore, the injection needle and injection pipe can be cleaned without stopping the liquid injection device, improving the liquid injection efficiency of the device.

Description

Technical Field

[0001] This application relates to the field of liquid injection equipment technology, and in particular to a liquid injection device and its control method. Background Technology

[0002] With the rapid development of new energy vehicles, the battery industry, primarily based on liquid batteries, has also experienced rapid growth. Liquid batteries contain an electrolyte.

[0003] In existing technologies, electrolyte is typically injected into batteries using an injection device. This device includes multiple injection plates, each equipped with a connected injection tube and injection needle. The electrolyte is injected into the battery through these tubes and needles. After prolonged operation, to prevent poor electrolyte filling in the battery, the injection device needs to be periodically stopped, and each injection plate cleaned sequentially.

[0004] However, cleaning each injection plate sequentially after stopping the injection equipment will reduce the injection efficiency of the equipment. Summary of the Invention

[0005] This application provides a liquid injection device and its control method to solve the problem in the prior art where stopping the liquid injection device to clean the injection plate leads to a decrease in the liquid injection efficiency of the liquid injection device.

[0006] In a first aspect, this application provides a liquid injection device, comprising:

[0007] The liquid injection assembly includes an electrolyte tank and multiple liquid injection plates. The electrolyte tank is used to store electrolyte, and the liquid injection plates are provided with connected liquid injection tubes and liquid injection needles.

[0008] A cleaning fluid assembly, comprising a cleaning fluid tank, a cleaning fluid pipeline, and a residual fluid tank, wherein the cleaning fluid tank is used to store the cleaning fluid, and one end of the cleaning fluid pipeline is connected to the cleaning fluid tank;

[0009] A switching component is provided to switch the injection plate between an injection state and a cleaning state. In the injection state, the injection pipe is connected to the electrolyte tank, and in the cleaning state, the injection pipe is connected to the residual liquid tank.

[0010] A drive assembly is provided for moving at least one of the cleaning fluid line and the injection plate to be cleaned during the cleaning state, such that the other end of the cleaning fluid line is connected to the injection needle of the injection plate to be cleaned.

[0011] In some possible implementations, the drive assembly includes a first drive member that drives the cleaning fluid line to move relative to the injection needle.

[0012] In some possible implementations, the drive assembly includes a second drive member that drives the injection needle to move toward the cleaning fluid line.

[0013] In some possible implementations, the cleaning fluid assembly further includes a first control valve disposed on the cleaning fluid line.

[0014] In some possible implementations, a vacuum assembly is also included, which includes a vacuum tank in communication with the residual liquid tank.

[0015] In some possible implementations, the vacuum assembly further includes a first vacuum line and a second vacuum line, the first vacuum line connecting the vacuum tank and the residual liquid tank, and the second vacuum line connecting the conversion assembly and the residual liquid tank.

[0016] In some possible implementations, the vacuum assembly further includes a second control valve disposed on the first vacuum line.

[0017] In some possible implementations, a control component is also included, which is electrically connected to the drive component and the conversion component.

[0018] Secondly, this application provides a control method for a liquid injection device, used in any of the above-mentioned liquid injection devices, comprising:

[0019] In response to the received cleaning command, the liquid injection equipment is controlled to enter the cleaning process;

[0020] Alternatively, the working time of the injection plate can be obtained, and if the working time is greater than or equal to a first preset time, the injection device can be controlled to enter the cleaning process.

[0021] The process of controlling the injection device to enter the cleaning process includes: controlling the switching component to switch the injection tube to the cleaning state, controlling the drive component to drive at least one of the cleaning fluid pipeline and the injection plate to move so that the cleaning fluid pipeline is connected to the injection needle, and controlling the first control valve to open.

[0022] In some possible implementations, the response to the received cleaning command, controlling the injection device to enter the cleaning process, includes:

[0023] The cleaning command is a manual cleaning command. In response to the received manual cleaning command, the status information of the liquid injection device is obtained.

[0024] If the status information of the injection device meets the preset cleaning conditions, then the injection device is controlled to enter the cleaning process;

[0025] The status information of the injection device includes the status information of the injection plate, the safety conditions of the injection device, and the status information of the cleaning fluid tank;

[0026] Alternatively, the cleaning instruction is an automatic cleaning instruction, and in response to the received automatic cleaning instruction, the status information of the injection plate is obtained;

[0027] Once the status information of the injection plate meets the preset cleaning conditions, the injection device is controlled to enter the cleaning process.

[0028] In some possible implementations, the step of obtaining the working time of the injection plate, if the working time is greater than or equal to a first preset time, controls the injection device to enter the cleaning process, including:

[0029] Obtain the working time of the injection plate; if the working time is greater than or equal to the first preset time, obtain the status information of the injection plate.

[0030] After the status information of the injection plate meets the preset cleaning conditions, the injection device is controlled to enter the cleaning process.

[0031] In some possible implementations, it also includes:

[0032] The time when the injection device enters the cleaning process is obtained;

[0033] If the time for entering the cleaning process is greater than or equal to the second preset time, then the first control valve is controlled to close.

[0034] This application discloses a liquid injection device and its control method. When cleaning of the injection plate is required, a drive component moves at least one of the cleaning fluid pipeline and the injection plate to be cleaned, so that the other end of the cleaning fluid pipeline is connected to the injection needle. A switching component switches the injection plate to be cleaned to the cleaning state, connecting the residual liquid tank to the injection pipe of the injection plate to be cleaned. This allows the cleaning fluid in the cleaning fluid tank to flow sequentially through the injection needle and the injection pipe, and then collect in the residual liquid tank. The cleaning fluid can then be used to clean the injection needle and the injection pipe, preventing poor battery injection. Therefore, the injection needle and injection pipe can be cleaned directly without stopping the liquid injection device. Furthermore, cleaning one injection plate does not affect the status of other injection plates, which can continue injection work, minimizing the impact on the output of the liquid injection device and improving its injection efficiency. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0036] Figure 1 This is a schematic diagram of the liquid injection device provided in the embodiments of this application;

[0037] Figure 2 A flowchart illustrating the control method for the injection device provided in this application embodiment. Figure 1 ;

[0038] Figure 3 A flowchart illustrating the control method for the injection device provided in this application embodiment. Figure 2 ;

[0039] Figure 4 A flowchart illustrating the control method for the injection device provided in this application embodiment. Figure 3 ;

[0040] Figure 5 A flowchart illustrating the control method for the injection device provided in this application embodiment. Figure 4 .

[0041] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments.

[0042] Explanation of reference numerals in the attached figures:

[0043] 10-cell;

[0044] 100 - Liquid injection assembly; 110 - Electrolyte tank; 120 - Liquid injection pipe; 130 - Liquid injection needle;

[0045] 200 - Cleaning fluid assembly; 210 - Cleaning fluid tank; 220 - Cleaning fluid pipeline; 230 - Residue tank; 240 - First control valve;

[0046] 300-Conversion Component;

[0047] 400 - Vacuum assembly; 410 - Vacuum tank; 420 - First vacuum line; 430 - Second vacuum line; 440 - Second control valve. Detailed Implementation

[0048] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0049] In existing technologies, electrolyte is typically injected into batteries using an electrolyte injection device. This device includes an electrolyte tank, an injection pump, and multiple injection plates, each equipped with a connected injection tube and injection needle. The injection pump pumps electrolyte from the electrolyte tank into the injection tube, which then injects the electrolyte into the battery through the injection tube and needle. After prolonged operation of the injection plates, electrolyte crystals may remain in the injection tube and needle due to prolonged periods of waiting or blockage. Battery electrolyte injection is usually timed, meaning that electrolyte is injected into the battery for a preset time using the injection tube and needle to ensure sufficient electrolyte levels. However, the presence of electrolyte crystals in the injection tube and needle can lead to insufficient electrolyte being injected into the battery within the preset time, resulting in poor electrolyte injection.

[0050] To prevent battery electrolyte filling defects, the electrolyte filling equipment needs to be periodically stopped, and each filling plate needs to be manually cleaned sequentially to avoid electrolyte crystallization residue in the filling tubes and needles. However, stopping the equipment and cleaning each filling plate individually until all plates are cleaned before restarting the equipment results in prolonged downtime, reducing the electrolyte filling output and consequently decreasing the filling efficiency.

[0051] Based on this, this application provides a liquid injection device. When cleaning of the injection plate is required, a drive component moves at least one of the cleaning fluid pipeline and the injection plate to be cleaned, so that the other end of the cleaning fluid pipeline is connected to the injection needle. A switching component switches the injection plate to be cleaned to the cleaning state, connecting the residual liquid tank to the injection pipe. This allows the cleaning fluid in the cleaning fluid tank to flow sequentially through the injection needle and the injection pipe, and then be collected in the residual liquid tank. The cleaning fluid can then be used to clean the injection needle and the injection pipe, preventing poor battery injection. Therefore, the injection needle and injection pipe can be cleaned directly without stopping the liquid injection device. Furthermore, cleaning one injection plate does not affect the status of other injection plates, which can continue injection work, minimizing the impact on the output of the liquid injection device and improving its injection efficiency.

[0052] The embodiments of this application are described below with reference to the accompanying drawings.

[0053] Reference Figure 1 The liquid injection device provided in this application includes a liquid injection component 100, a cleaning fluid component 200, a drive component, and a conversion component 300. The liquid injection component 100 includes an electrolyte tank 110 and multiple liquid injection plates. The liquid injection plates are provided with a connected liquid injection pipe 120 and a liquid injection needle 130.

[0054] The cleaning fluid assembly 200 includes a cleaning fluid tank 210, a cleaning fluid line 220, and a residual fluid tank 230. The cleaning fluid tank 210 stores the cleaning fluid, and one end of the cleaning fluid line 220 is connected to the cleaning fluid tank 210. A switching assembly 300 switches the injection plate between an injection state and a cleaning state. In the injection state, the injection line 120 is connected to the electrolyte tank 110; in the cleaning state, the injection line 120 is connected to the residual fluid tank 230. A drive assembly moves at least one of the cleaning fluid line 220 and the injection plate to be cleaned during the cleaning state, so that the other end of the cleaning fluid line 220 is connected to the injection needle 130 of the injection plate to be cleaned.

[0055] The cleaning solution can be DMC (dimethyl carbonate).

[0056] The conversion assembly 300 has a first connection port, a second connection port, and a third connection port. The first connection port is connected to the injection pipe 120, the second connection port is connected to the electrolyte tank 110, and the third connection port is connected to the residual liquid tank 230. When the injection plate 400 is in the injection state, the first and second connection ports are connected, and the third connection port is closed, so that the electrolyte in the electrolyte tank 110 can flow sequentially through the second and first connection ports into the injection pipe 120. When the injection plate 400 is in the cleaning state, the first and third connection ports are connected, and the second connection port is closed, so that the cleaning solution in the injection pipe 120 can flow sequentially through the first and third connection ports into the residual liquid tank 230.

[0057] Specifically, the electrolyte injection device is used to inject electrolyte into the battery cell 10. During electrolyte injection into the battery cell 10, the injection plate is positioned at the injection point, and the injection pipe 120 is connected to the electrolyte tank 110. The electrolyte stored in the electrolyte tank 110 flows sequentially through the injection pipe 120 and the injection needle 130 into the battery cell 10, i.e., the electrolyte flows along... Figure 1 The dashed arrow in the diagram indicates the flow path to fill the electrolyte into the cell 10.

[0058] When the injection plate 400 needs to be cleaned, the driving component moves the cleaning fluid pipeline 220 and the injection plate sequentially to the cleaning position, connecting the other end of the cleaning fluid pipeline 220 to the injection needle 130. Simultaneously, the switching component 300 switches the injection plate from the injection state to the cleaning state, changing the connection between the injection pipe 120 and the electrolyte tank 110 to the connection between the injection pipe 120 and the residual liquid tank 230. This allows the cleaning fluid tank 210, cleaning fluid pipeline 220, injection needle 130, injection pipe 120, and residual liquid tank 230 to be sequentially connected. The cleaning fluid flows out of the cleaning fluid tank 210, through the cleaning fluid pipeline 220 to the injection needle 130, and then sequentially through the injection needle 130 and the injection pipe 120. In other words, the cleaning fluid flows along... Figure 1The solid arrow in the image indicates the flow path for cleaning the injection needle 130 and injection tube 120. Simultaneously, the cleaning fluid flowing out of the injection tube 120 can be collected through the residual fluid tank 230 to collect the used cleaning fluid.

[0059] Understandably, a cleaning command can be sent to the electrolyte injection device after a preset working time for the electrolyte injection plate, in order to clean the electrolyte injection plate to be cleaned. The electrolyte injection device includes multiple electrolyte injection plates. When one electrolyte injection plate is in the cleaning state, the other electrolyte injection plates can remain in the electrolyte injection state, continuing to inject electrolyte into the battery cell 10. Furthermore, the cleaning fluid assembly 200 can be set up one-to-one with the electrolyte injection plates.

[0060] The liquid injection device provided in this embodiment of the application has one end of the cleaning fluid pipeline 220 connected to the cleaning fluid tank 210. When the liquid injection plate needs to be cleaned, at least one of the cleaning fluid pipeline 220 and the liquid injection plate to be cleaned is moved by the drive component, so that the other end of the cleaning fluid pipeline 220 is connected to the liquid injection needle 130. The liquid injection plate to be cleaned is switched to the cleaning state by the switching component 300, so that the residual liquid tank 230 is connected to the liquid injection pipe 120 of the liquid injection plate to be cleaned, so that the cleaning fluid in the cleaning fluid tank 210 flows sequentially through the liquid injection needle 130 and the liquid injection pipe 120, and is then collected in the residual liquid tank 230. Thus, the liquid injection needle 130 and the liquid injection pipe 120 can be cleaned by the cleaning fluid, avoiding the problem of poor liquid injection in the battery. Therefore, the liquid injection needle 130 and the liquid injection pipe 120 can be cleaned directly without stopping the liquid injection device. Furthermore, cleaning one of the injection plates in the injection equipment does not affect the status of the other injection plates, which can continue to perform injection work. This has minimal impact on the output of the injection equipment and improves its injection efficiency.

[0061] In a specific implementation, the driving component includes a first driving member and a second driving member. The first driving member is used to drive the cleaning fluid line 220 to move relative to the injection needle 130.

[0062] The second driving component is used to drive the injection needle 130 to move toward the cleaning fluid line 220 so that the cleaning fluid line 220 is connected to the injection needle 130.

[0063] For example, the first driving component and the second driving component may be a cylinder or a linear motor, etc.

[0064] Specifically, when cleaning the injection plate, the first driving component first moves the cleaning fluid line 220 to the cleaning position so that the cleaning fluid line 220 is aligned with the injection needle 130. Then, the second driving component drives the injection needle 130 to connect with the cleaning fluid line 220, thereby moving the injection plate to the cleaning position and connecting the injection needle 130 with the cleaning fluid line 220.

[0065] Understandably, the first driving component can drive the cleaning fluid tank 210 to move, thereby driving the cleaning fluid pipeline 220 to move.

[0066] In some examples, the first drive unit moves the cleaning fluid line 220 below the injection needle 130, and then the second drive unit moves the injection plate downward so that the injection needle 130 moves downward, thereby connecting the injection needle 130 with the cleaning fluid line 220.

[0067] In other examples, the drive assembly also includes a fixing member for fixing the injection plate in the cleaning position after the second drive member drives the injection plate to the cleaning position, so as to prevent the injection plate from shifting during the cleaning process.

[0068] In some embodiments, the drive assembly further includes a third drive member for driving the battery cell 10 to the cleaning position to avoid the battery cell 10 affecting the cleaning of the liquid injection plate.

[0069] In a specific implementation, the cleaning fluid assembly 200 also includes a first control valve 240, which is disposed on the cleaning fluid pipeline 220.

[0070] Specifically, a first control valve 240 is provided to control the connection or disconnection of the cleaning fluid pipeline 220, thereby controlling the opening or closing of the cleaning fluid tank 210. The first control valve 240 opens when the injection plate needs cleaning.

[0071] For example, the first control valve 240 can be a solenoid valve. Further, the first control valve 240 can be a check valve.

[0072] In a specific implementation, the liquid injection device provided in this application embodiment also includes a vacuum component 400, which includes a vacuum tank 410 and is connected to the residual liquid tank 230.

[0073] The system includes a vacuum tank 410 to draw the used cleaning fluid into a residual liquid tank 230, which facilitates the collection of the used cleaning fluid in the residual liquid tank 230.

[0074] In a specific implementation, the vacuum assembly 400 also includes a first vacuum line 420 and a second vacuum line 430. The first vacuum line 420 connects the vacuum tank 410 and the residual liquid tank 230, and the second vacuum line 430 connects the conversion assembly 300 and the residual liquid tank 230.

[0075] Specifically, the vacuum tank 410 can draw the cleaning fluid in the injection pipe 120 into the residual liquid tank 230 through the first vacuum line 420 and the second vacuum line 430.

[0076] For example, the second vacuum line 430 is connected to the third connection port of the conversion component 300 and the residual liquid tank 230, and the cleaning fluid in the injection pipe 120 flows to the residual liquid tank 230 through the conversion component 300 and the second vacuum line 430.

[0077] In some examples, the vacuum assembly 400 also includes a gas-liquid separator disposed on the first vacuum line 420 to prevent cleaning fluid from entering the vacuum tank 410 via the first vacuum line 420.

[0078] In a specific implementation, the vacuum assembly 400 also includes a second control valve 440, which is disposed on the first vacuum line 420.

[0079] Specifically, a second control valve 440 is provided to control the connection or disconnection of the first vacuum line 420 by opening or closing the second control valve 440, thereby controlling the connection or disconnection between the vacuum tank 410 and the residual liquid tank 230. When it is necessary to clean the injection plate, the second control valve 440 is opened.

[0080] In some embodiments, the liquid injection device provided in this application further includes a control component, which is used to receive cleaning commands and is electrically connected to the drive component and the conversion component 300.

[0081] Upon receiving a cleaning command, the control component controls the drive component to move one of the cleaning fluid line 220 and the injection needle 130, thereby connecting the cleaning fluid line 220 to the injection needle 130. Simultaneously, the control component controls the switching component 300 to switch the connection between the injection pipe 120 and the electrolyte tank 110 to the connection between the injection pipe 120 and the residual liquid tank 230.

[0082] Specifically, the control component is electrically connected to both the first control valve 240 and the second control valve 440. After receiving a cleaning command, the control component controls the opening of both the first and second control valves 240. After cleaning is completed, the first control valve 240 is closed, and a period of time is waited to allow the cleaning fluid in the injection tube 120 and injection needle 130 to be drawn into the residual liquid tank 230 before the second control valve 440 is closed.

[0083] Based on the above embodiments, referring to Figure 2 , Figure 2 This application also provides a flowchart illustrating a control method for a liquid injection device. Figure 1 The method includes:

[0084] S101. Respond to the received manual cleaning command and obtain the status information of the liquid injection equipment;

[0085] The manual cleaning command refers to the cleaning command received by the injection equipment during manual operation. The status information of the injection equipment includes the status information of the injection plate, the safety conditions of the injection equipment, and the status information of the cleaning fluid tank 210.

[0086] S102. If the status information of the injection equipment meets the preset cleaning conditions, then control the injection equipment to enter the cleaning process.

[0087] The status information of the liquid injection plate meeting the preset cleaning conditions means that there is no battery on the liquid injection plate and that safety conditions are met. The status information of the cleaning fluid tank 210 meeting the preset cleaning conditions means that the amount of cleaning fluid in the cleaning fluid tank 210 is sufficient.

[0088] Reference Figure 3 , Figure 3 This application also provides a flowchart illustrating a control method for a liquid injection device. Figure 2 The method includes:

[0089] S201. Respond to the received automatic cleaning command and obtain the status information of the injection plate;

[0090] Among them, the automatic cleaning command refers to the cleaning command received by the liquid injection equipment during automatic operation.

[0091] S202. After the status information of the injection plate meets the preset cleaning conditions, control the injection equipment to enter the cleaning process.

[0092] When the liquid injection equipment operates automatically, it waits for the status information of the liquid injection plate to meet the cleaning conditions. This means that after the liquid injection plate completes one liquid injection cycle, there are no batteries on the liquid injection plate. At this point, the liquid injection equipment can be controlled to enter the cleaning process.

[0093] Reference Figure 4 , Figure 4 This application also provides a flowchart illustrating a control method for a liquid injection device. Figure 3 The method includes:

[0094] S301. Obtain the working time of the injection plate;

[0095] When the injection plate has not been cleaned before, the working time refers to the cumulative working time of the injection plate. When the injection plates have been cleaned before, the working time refers to the time since the end of the last cleaning process.

[0096] S302. If the working time is greater than or equal to the first preset time, obtain the status information of the injection plate.

[0097] When the working time of the injection plate is greater than or equal to the first preset time, electrolyte crystallization is more likely to occur in the injection tube 120 and the injection needle 130. It is understood that the first preset time can be adaptively set according to actual needs.

[0098] S303. After the status information of the injection plate meets the preset cleaning conditions, control the injection equipment to enter the cleaning process.

[0099] The condition that the liquid injection plate meets the cleaning requirements means that there are no batteries on the liquid injection plate after it has completed one liquid injection cycle. At this point, the liquid injection equipment can be controlled to enter the cleaning process.

[0100] Reference Figure 5 , Figure 5 This application also provides a flowchart illustrating a control method for a liquid injection device. Figure 4 The method includes:

[0101] S401, The control drive assembly drives at least one of the cleaning fluid line 220 and the injection plate to be cleaned to move, so that the cleaning fluid line 220 is connected to the injection needle 130, and controls the first control valve 240 to open.

[0102] The cleaning fluid pipeline 220 is connected to the cleaning fluid tank 210 and is also connected to the injection needle 130, so that the cleaning fluid in the cleaning fluid tank 210 can enter the injection needle 130 and the injection tube 120 through the cleaning fluid pipeline 220 to clean the injection needle 130 and the injection tube 120.

[0103] The first control valve 240 is installed on the cleaning fluid line 220 to connect or disconnect the cleaning fluid line 220. When the first control valve 240 is open, the cleaning fluid can flow through the cleaning fluid line 220 to the injection needle 130.

[0104] S402, Control the switching component 300 to switch the liquid injection plate to the cleaning state and control the second control valve 440 to open;

[0105] During the cleaning of the injection plate, the injection pipe 120 is connected to the residual liquid tank 230 by the conversion component 300, so that the cleaning liquid in the injection pipe 120 can flow into the residual liquid tank 230, and the cleaning liquid can be collected through the residual liquid tank 230.

[0106] The second control valve 440 is located between the vacuum tank 410 and the residual liquid tank 230. When the second control valve 440 is opened, the cleaning fluid can be drawn into the residual liquid tank 230 through the vacuum tank 410.

[0107] S403. Obtain the cleaning time of the injection plate;

[0108] The cleaning time for the injection plate refers to the time elapsed since it entered the cleaning process.

[0109] S404. If the cleaning time is greater than or equal to the second preset time, then control the first control valve 240 to close.

[0110] When the cleaning time is greater than or equal to the second preset time, it indicates that the electrolyte crystals in the injection tube 120 and injection needle 130 have been completely cleaned. At this time, the first control valve 240 is closed, thereby stopping the continued input of cleaning fluid into the injection needle 130.

[0111] Understandably, the second preset time can be set adaptively according to actual needs.

[0112] S405, Obtain the time elapsed since the first control valve 240 closed;

[0113] The time elapsed since the first control valve 240 is closed refers to the time after the first control valve 240 is closed, during which the cleaning fluid is drawn from the injection tube 120 and the injection needle 130 through the vacuum tank 410.

[0114] S406. If the time between closing the first control valve 240 and closing the valve is greater than or equal to a third preset time, then control the second control valve 440 to close.

[0115] If the time between the closing of the first control valve 240 and the closing of the third preset time is greater than or equal to the time between the closing of the first control valve 240 and the closing of the third preset time, it indicates that all the cleaning fluid in the injection pipe 120 and the injection needle 130 has been drawn into the residual liquid tank 230. At this time, the second control valve 440 is closed, thereby stopping the continued extraction of cleaning fluid from the injection pipe 120 and the injection needle 130. At this point, the cleaning process is complete.

[0116] Understandably, the third preset time can be set adaptively according to actual needs.

[0117] S407, The control drive component drives the cleaning fluid pipeline 220 and the injection plate to reset, and controls the conversion component 300 to switch the injection plate to the injection state.

[0118] After the cleaning process is completed, the cleaning fluid pipeline 220 and the injection plate are reset, and the injection pipe 120 is connected to the electrolyte tank 110, so that the injection plate is in the injection state, so that electrolyte is injected into the cell 10 through the injection pipe 120 and the injection needle 130.

[0119] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0120] In the embodiments of this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of 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. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" 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 the embodiments of this application according to the specific circumstances.

[0121] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0122] Unless otherwise stated, the term "multiple" means two or more.

[0123] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the scope of this application is limited only by the appended claims.

Claims

1. A liquid injection device, characterized in that, include: The liquid injection assembly (100) includes an electrolyte tank (110) and multiple liquid injection plates. The electrolyte tank (110) is used to store electrolyte. The liquid injection plates are provided with a connected liquid injection tube (120) and a liquid injection needle (130). A cleaning fluid assembly (200) includes a cleaning fluid tank (210), a cleaning fluid pipeline (220), and a residual fluid tank (230). The cleaning fluid tank (210) is used to store cleaning fluid, and one end of the cleaning fluid pipeline (220) is connected to the cleaning fluid tank (210). A conversion assembly (300) is used to switch the injection plate between an injection state and a cleaning state. In the injection state, the injection pipe (120) is connected to the electrolyte tank (110). In the cleaning state, the injection pipe (120) is connected to the residual liquid tank (230). A drive assembly is used to drive at least one of the cleaning fluid line (220) and the injection plate to be cleaned to move during the cleaning state, so that the other end of the cleaning fluid line (220) is connected to the injection needle (130) of the injection plate to be cleaned. A vacuum assembly (400) includes a vacuum tank (410) connected to the residual liquid tank (230); The vacuum assembly (400) further includes a first vacuum line (420) and a second vacuum line (430), the first vacuum line (420) connecting the vacuum tank (410) and the residual liquid tank (230), and the second vacuum line (430) connecting the conversion assembly (300) and the residual liquid tank (230).

2. The liquid injection device according to claim 1, characterized in that, The drive assembly includes a first drive member that drives the cleaning fluid line (220) to move relative to the injection needle (130).

3. The liquid injection device according to claim 1, characterized in that, The drive assembly includes a second drive member that drives the injection needle (130) to move toward the cleaning fluid line (220).

4. The liquid injection device according to claim 1, characterized in that, The cleaning fluid assembly (200) also includes a first control valve (240), which is disposed on the cleaning fluid line (220).

5. The liquid injection device according to claim 1, characterized in that, The vacuum assembly (400) further includes a second control valve (440), which is disposed on the first vacuum line (420).

6. The liquid injection device according to any one of claims 1-4, characterized in that, It also includes a control component that is electrically connected to the drive component and the conversion component (300).

7. A control method for a liquid injection device, used in the liquid injection device according to any one of claims 1-6, characterized in that, include: In response to the received cleaning command, the liquid injection equipment is controlled to enter the cleaning process; Alternatively, the working time of the injection plate can be obtained, and if the working time is greater than or equal to a first preset time, the injection device can be controlled to enter the cleaning process. The process of controlling the injection device to enter the cleaning process includes: controlling the conversion component (300) to switch the injection plate to be cleaned to the cleaning state, controlling the drive component to drive at least one of the cleaning fluid pipeline (220) and the injection plate to be cleaned to move, so that the cleaning fluid pipeline (220) is connected to the injection needle (130) of the injection plate to be cleaned, and controlling the first control valve (240) to open.

8. The method according to claim 7, characterized in that, The response to the received cleaning command controls the injection device to enter the cleaning process, including: The cleaning command is a manual cleaning command. In response to the received manual cleaning command, the status information of the liquid injection device is obtained. If the status information of the injection device meets the preset cleaning conditions, then the injection device is controlled to enter the cleaning process; The status information of the injection device includes the status information of the injection plate, the safety conditions of the injection device, and the status information of the cleaning fluid tank; Alternatively, the cleaning instruction is an automatic cleaning instruction, and in response to the received automatic cleaning instruction, the status information of the injection plate is obtained; Once the status information of the injection plate meets the preset cleaning conditions, the injection device is controlled to enter the cleaning process.

9. The method according to claim 7, characterized in that, The working time for acquiring the injection plate, if the working time is greater than or equal to a first preset time, controls the injection equipment to enter the cleaning process, including: Obtain the working time of the injection plate; if the working time is greater than or equal to the first preset time, obtain the status information of the injection plate. Once the status information of the injection plate meets the preset cleaning conditions, the injection device is controlled to enter the cleaning process.

10. The method according to any one of claims 7-9, characterized in that, Also includes: The time when the injection device enters the cleaning process is obtained; If the time for entering the cleaning process is greater than or equal to the second preset time, then the first control valve (240) is controlled to close.

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