Liquid injection equipment and control method thereof

Abstract

The invention provides liquid injection equipment and a control method thereof, and relates to the technical field of liquid injection equipment. The liquid injection equipment comprises a liquid injection assembly, a cleaning liquid assembly, a driving assembly and a conversion assembly. The liquid injection assembly comprises an electrolyte tank and a plurality of liquid injection plates, liquid injection pipes and liquid injection needles which are communicated with each other are arranged on the liquid injection plates, the cleaning liquid assembly comprises a cleaning liquid tank, a cleaning liquid pipeline and a residual liquid tank, and one end of the cleaning liquid pipeline is communicated with the cleaning liquid tank; the conversion assembly is used for switching the liquid injection plate between a liquid injection state and a cleaning state, and in the cleaning state, the liquid injection pipe is communicated with the residual liquid tank; the driving assembly is used for enabling the other end of the cleaning liquid pipeline to be communicated with the liquid injection needle in the cleaning state. Therefore, the liquid injection needle head and the liquid injection pipe can be cleaned without stopping the liquid injection equipment, and the liquid injection efficiency of the liquid injection equipment is improved.

Description

Technical Field

[0001] The present application relates to the technical field of liquid injection equipment, and in particular to a liquid injection equipment and a control method thereof. Background Art

[0002] With the rapid development of new energy vehicles, the battery industry, which is mainly based on liquid batteries, has also developed rapidly. Among them, liquid batteries contain electrolytes.

[0003] In the prior art, electrolyte is usually injected into the battery through an injection device, which includes a plurality of injection plates, on which are provided interconnected injection tubes and injection needles, through which the electrolyte is injected into the battery. After the injection plates have been working for a long time, in order to avoid the problem of poor injection of the battery, the injection device needs to be stopped regularly, and then each injection plate needs to be cleaned in turn.

[0004] However, after stopping the liquid injection device, cleaning each liquid injection plate in turn will cause the liquid injection efficiency of the liquid injection device to decrease. Summary of the invention

[0005] The present application provides a liquid injection device and a control method thereof, which are used to solve the problem in the prior art that the liquid injection device is stopped to clean the liquid injection plate, resulting in reduced liquid injection efficiency of the liquid injection device.

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

[0007] A liquid injection assembly, the liquid injection assembly comprising an electrolyte tank and a plurality of 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 liquid assembly, the cleaning liquid assembly comprising a cleaning liquid tank, a cleaning liquid pipeline and a residual liquid tank, the cleaning liquid tank being used to store cleaning liquid, and one end of the cleaning liquid pipeline being connected to the cleaning liquid tank;

[0009] A conversion assembly, the conversion assembly is used to switch the liquid injection plate between a liquid injection state and a cleaning state, in which the liquid injection pipe is connected to the electrolyte tank in the liquid injection state, and in which the liquid injection pipe is connected to the residual liquid tank in the cleaning state;

[0010] A driving component is used to drive at least one of the cleaning liquid pipeline and the injection plate to be cleaned to move in the cleaning state, so that the other end of the cleaning liquid pipeline 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, and the first drive member drives the cleaning liquid pipeline to move relative to the injection needle.

[0012] In some possible implementations, the drive assembly includes a second drive member, and the second drive member drives the injection needle to move toward the cleaning liquid pipeline.

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

[0014] In some possible implementations, a vacuum component is further included, and the vacuum component includes a vacuum tank, and the vacuum tank is connected to the residual liquid tank.

[0015] In some possible implementations, the vacuum component further includes a first vacuum pipeline and a second vacuum pipeline, the first vacuum pipeline connects the vacuum tank and the residual liquid tank, and the second vacuum pipeline is used to connect the conversion component and the residual liquid tank.

[0016] In some possible implementations, the vacuum component further includes a second control valve, and the second control valve is disposed on the first vacuum pipeline.

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

[0018] In a second aspect, the present application provides a control method for a liquid injection device, which is used for any of the above-mentioned liquid injection devices, comprising:

[0019] In response to the received cleaning instruction, control the liquid injection equipment to enter the cleaning process;

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

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

[0022] In some possible implementations, the step of controlling the liquid injection device to enter a cleaning process in response to the received cleaning instruction includes:

[0023] The cleaning instruction is a manual cleaning instruction, and in response to the received manual cleaning instruction, the status information of the liquid injection device is obtained;

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

[0025] The state information of the liquid injection equipment includes the state information of the liquid injection plate, the safety condition of the liquid injection equipment and the state information of the cleaning liquid 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 liquid injection plate is obtained;

[0027] After waiting for the status information of the liquid injection plate to meet the preset cleaning conditions, the liquid 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, and controlling the injection device to enter a cleaning process if the working time is greater than or equal to a first preset time, includes:

[0029] Acquire the working time of the injection plate, and if the working time is greater than or equal to the first preset time, acquire the status information of the injection plate;

[0030] After waiting for the status information of the liquid injection plate to meet the preset cleaning condition, the liquid injection device is controlled to enter the cleaning process.

[0031] In some possible implementations, the following further includes:

[0032] Obtaining the time when the liquid injection device enters the cleaning process;

[0033] If the time of entering the cleaning process is greater than or equal to the second preset time, the first control valve is controlled to be closed.

[0034] The present application proposes a liquid injection device and a control method thereof. When the liquid injection plate needs to be cleaned, the driving component drives at least one of the cleaning liquid pipeline and the liquid injection plate to be cleaned to move, so that the other end of the cleaning liquid pipeline is connected to the liquid injection needle. The liquid injection plate to be cleaned is switched to the cleaning state by the conversion component, that is, the residual liquid tank is connected to the liquid injection tube of the liquid injection plate to be cleaned, so that the cleaning liquid in the cleaning liquid tank flows through the liquid injection needle and the liquid injection tube in turn, and then is collected in the residual liquid tank, and then the liquid injection needle and the liquid injection tube can be cleaned by the cleaning liquid, so as to avoid the problem of poor liquid injection in the battery. Therefore, the liquid injection needle and the liquid injection tube can be directly cleaned without stopping the liquid injection device. And when one of the liquid injection plates of the liquid injection device is cleaned, it will not affect the state of other liquid injection plates, and other liquid injection plates can continue to perform liquid injection work, which has little impact on the output of the liquid injection device and improves the liquid injection efficiency of the liquid injection device. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0036] Figure 1 A schematic diagram of the principle of the liquid injection device provided in the embodiment of the present application;

[0037] Figure 2 Schematic diagram of the control method of the liquid injection device provided in the embodiment of the present application Figure 1 ;

[0038] Figure 3 Schematic diagram of the control method of the liquid injection device provided in the embodiment of the present application Figure 2 ;

[0039] Figure 4 Schematic diagram of the control method of the liquid injection device provided in the embodiment of the present application Figure 3 ;

[0040] Figure 5 Schematic diagram of the control method of the liquid injection device provided in the embodiment of the present application Figure 4 .

[0041] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments.

[0042] Description of reference numerals:

[0043] 10-battery cell;

[0044] 100 - injection assembly; 110 - electrolyte tank; 120 - injection tube; 130 - injection needle;

[0045] 200-cleaning liquid assembly; 210-cleaning liquid tank; 220-cleaning liquid pipeline; 230-residual liquid tank; 240-first control valve;

[0046] 300-conversion components;

[0047] 400 - vacuum assembly; 410 - vacuum tank; 420 - first vacuum pipeline; 430 - second vacuum pipeline; 440 - second control valve. DETAILED DESCRIPTION

[0048] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0049] In the prior art, electrolyte is usually injected into the battery through an injection device, which includes an electrolyte tank, an injection pump and multiple injection plates, and a connected injection tube and injection needle are provided on the injection plate. The electrolyte in the electrolyte tank is injected into the injection tube through the injection pump, and then the electrolyte is injected into the battery through the injection tube and the injection needle. After the injection plate has been working for a long time, electrolyte crystals will remain in the injection tube and the injection needle due to the long-term waiting or blocking of the injection tube and the injection needle. When injecting the battery, timed injection is usually used, that is, the electrolyte is injected into the battery for a preset time through the injection tube and the injection needle to ensure the amount of electrolyte in the battery. However, when there are electrolyte crystals in the injection tube and the injection needle, the amount of electrolyte injected into the battery at the preset time will be insufficient, resulting in poor injection of the battery.

[0050] In order to avoid the problem of poor battery injection, the injection equipment needs to be stopped regularly and each injection plate needs to be cleaned manually in order to avoid electrolyte crystals remaining in the injection tube and the injection needle. However, the injection equipment needs to be stopped and the injection plates need to be cleaned one by one until all the injection plates are cleaned. The injection equipment can then be started to continue the injection work. The downtime of the injection equipment is long, resulting in a decrease in the injection output of the injection equipment, and then a decrease in the injection efficiency of the injection equipment.

[0051] Based on this, an embodiment of the present application provides a liquid injection device. When the liquid injection plate needs to be cleaned, the driving component drives at least one of the cleaning liquid pipeline and the liquid injection plate to be cleaned to move, so that the other end of the cleaning liquid pipeline is connected to the liquid injection needle. The liquid injection plate to be cleaned is switched to the cleaning state through the conversion component, that is, the residual liquid tank is connected to the liquid injection tube, so that the cleaning liquid in the cleaning liquid tank flows through the liquid injection needle and the liquid injection tube in turn, and then is collected in the residual liquid tank, and then the liquid injection needle and the liquid injection tube can be cleaned by the cleaning liquid, avoiding the problem of poor liquid injection in the battery. Therefore, the liquid injection needle and the liquid injection tube can be directly cleaned without shutting down the liquid injection device. And when one of the liquid injection plates of the liquid injection device is cleaned, it will not affect the state of other liquid injection plates. Other liquid injection plates can continue to perform liquid injection work, which has little impact on the output of the liquid injection device and improves the liquid injection efficiency of the liquid injection device.

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

[0053] Reference Figure 1 The liquid injection device provided in the embodiment of the present application includes a liquid injection component 100, a cleaning liquid component 200, a driving component and a conversion component 300. The liquid injection component 100 includes an electrolyte tank 110 and a plurality of liquid injection plates, and the liquid injection plates are provided with connected liquid injection tubes 120 and liquid injection needles 130.

[0054] The cleaning liquid assembly 200 includes a cleaning liquid tank 210, a cleaning liquid pipeline 220 and a residual liquid tank 230. The cleaning liquid tank 210 is used to store cleaning liquid, and one end of the cleaning liquid pipeline 220 is connected to the cleaning liquid tank 210. The conversion assembly 300 is used to switch the liquid injection plate between the liquid injection state and the cleaning state. In the liquid injection state, the liquid injection pipe 120 is connected to the electrolyte tank 110, and in the cleaning state, the liquid injection pipe 120 is connected to the residual liquid tank 230. The driving assembly is used to drive at least one of the cleaning liquid pipeline 220 and the liquid injection plate to be cleaned to move in the cleaning state, so that the other end of the cleaning liquid pipeline 220 is connected to the liquid injection needle 130 of the liquid injection plate to be cleaned.

[0055] The cleaning liquid may be DMC (dimethyl carbonate).

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

[0057] Specifically, the injection device is used to inject electrolyte into the battery cell 10. When injecting electrolyte into the battery cell 10, the injection plate is located at the injection position, and the injection pipe 120 is connected to the electrolyte tank 110. The electrolyte stored in the electrolyte tank 110 flows into the battery cell 10 through the injection pipe 120 and the injection needle 130 in turn, that is, the electrolyte flows along the injection plate 120 and the injection needle 130. Figure 1 The electrolyte flows along the path indicated by the dotted arrow in the figure to be poured into the battery cell 10.

[0058] When the injection plate 400 needs to be cleaned, the cleaning liquid pipeline 220 and the injection plate are driven to move by the driving component, so as to move the cleaning liquid pipeline 220 and the injection plate to the cleaning position in sequence, so that the other end of the cleaning liquid pipeline 220 is connected with the injection needle 130. At the same time, the injection plate is switched from the injection state to the cleaning state by the conversion component 300, that is, the connection between the injection tube 120 and the electrolyte tank 110 is switched to the connection between the injection tube 120 and the residual liquid tank 230. In this way, the cleaning liquid tank 210, the cleaning liquid pipeline 220, the injection needle 130, the injection tube 120 and the residual liquid tank 230 are connected in sequence, and the cleaning liquid flows out through the cleaning liquid tank 210, and flows to the injection needle 130 through the cleaning liquid pipeline 220, and then flows through the injection needle 130 and the injection tube 120 in sequence. In other words, the cleaning liquid flows along Figure 1The solid arrow in the figure flows along the path shown in the figure to clean the injection needle 130 and the injection tube 120. At the same time, the cleaning liquid flowing out through the injection tube 120 can be collected by the residual liquid tank 230 to collect the used cleaning liquid.

[0059] It is understandable that after the injection plate works for a preset time, a cleaning instruction can be sent to the injection device to clean the injection plate to be cleaned. The injection device includes multiple injection plates, and when one injection plate is in a cleaning state, the other injection plates can be maintained in a liquid injection state to continue to inject electrolyte into the battery cell 10. Further, the cleaning liquid assembly 200 can be set one by one with the injection plate.

[0060] In the liquid injection device provided in the embodiment of the present application, one end of the cleaning liquid pipeline 220 is connected to the cleaning liquid tank 210. When the liquid injection plate needs to be cleaned, the cleaning liquid pipeline 220 and at least one of the liquid injection plate to be cleaned are driven to move by the driving component so that the other end of the cleaning liquid 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 conversion component 300, that is, the residual liquid tank 230 is connected to the liquid injection tube 120 of the liquid injection plate to be cleaned, so that the cleaning liquid in the cleaning liquid tank 210 flows through the liquid injection needle 130 and the liquid injection tube 120 in turn, and then is collected in the residual liquid tank 230, and then the liquid injection needle 130 and the liquid injection tube 120 can be cleaned by the cleaning liquid, so as to avoid the problem of poor liquid injection in the battery. In this way, the liquid injection needle 130 and the liquid injection tube 120 can be cleaned directly without stopping the liquid injection equipment for cleaning. When one of the injection plates of the injection equipment is cleaned, the status of other injection plates will not be affected. Other injection plates can continue to perform injection work, which has little impact on the output of the injection equipment and improves the injection efficiency of the injection equipment.

[0061] In a specific implementation, the driving assembly includes a first driving member and a second driving member, and the first driving member is used to drive the cleaning liquid pipeline 220 to move relative to the injection needle 130.

[0062] The second driving member is used to drive the injection needle 130 to move toward the cleaning liquid pipeline 220 so that the cleaning liquid pipeline 220 is connected to the injection needle 130 .

[0063] Exemplarily, the first driving member and the second driving member may be cylinders or linear motors, etc.

[0064] Specifically, when the injection plate is cleaned, the first driving member is used to drive the cleaning liquid pipeline 220 to move to the cleaning position, so that the cleaning liquid pipeline 220 is opposite to the injection needle 130. Then, the second driving member is used to drive the injection needle 130 toward the cleaning liquid pipeline 220 to communicate with the cleaning liquid pipeline 220, so as to move the injection plate to the cleaning position, and then the injection needle 130 can be connected with the cleaning liquid pipeline 220.

[0065] It can be understood that the first driving member can drive the cleaning liquid tank 210 to move, thereby driving the cleaning liquid pipeline 220 to move.

[0066] In some examples, the first driving member drives the cleaning liquid pipeline 220 to move below the injection needle 130, and then the second driving member drives the injection plate to move downward to move the injection needle 130 downward, thereby connecting the injection needle 130 to the cleaning liquid pipeline 220.

[0067] In other examples, the drive assembly further includes a fixing member, which is used to fix the liquid injection plate at the cleaning position after the second drive member drives the liquid injection plate to move to the cleaning position, so as to prevent the liquid injection plate from being displaced during the cleaning process.

[0068] In some embodiments, the driving assembly further includes a third driving member, which is used to drive the battery cell 10 to move to a cleaning position to prevent the battery cell 10 from affecting the cleaning of the liquid injection plate.

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

[0070] The first control valve 240 is provided to control the connection or disconnection of the cleaning liquid pipeline 220 by opening or closing the first control valve 240, thereby controlling the opening or closing of the cleaning liquid tank 210. When the injection plate needs to be cleaned, the first control valve 240 is opened.

[0071] For example, the first control valve 240 may be a solenoid valve. Further, the first control valve 240 may be a one-way valve.

[0072] In a specific implementation, the liquid injection equipment provided in the embodiment of the present application further includes a vacuum component 400 , and the vacuum component 400 includes a vacuum tank 410 , and the vacuum tank 410 is connected to the residual liquid tank 230 .

[0073] Wherein, by providing a vacuum tank 410, the used cleaning liquid is pumped into the residual liquid tank 230 through the vacuum tank 410, thereby facilitating the residual liquid tank 230 to collect the used cleaning liquid.

[0074] In a specific implementation, the vacuum assembly 400 further includes a first vacuum pipeline 420 and a second vacuum pipeline 430 . The first vacuum pipeline 420 connects the vacuum tank 410 with the residual liquid tank 230 , and the second vacuum pipeline 430 is used to connect the conversion assembly 300 with the residual liquid tank 230 .

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

[0076] Exemplarily, the second vacuum pipeline 430 connects the third connecting port of the conversion assembly 300 with the residual liquid tank 230 , and the cleaning liquid in the injection pipe 120 flows into the residual liquid tank 230 through the conversion assembly 300 and the second vacuum pipeline 430 .

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

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

[0079] The second control valve 440 is provided to control the connection or disconnection of the first vacuum pipeline 420 by opening or closing the second control valve 440, thereby controlling the connection or disconnection of the vacuum tank 410 and the residual liquid tank 230. When the injection plate needs to be cleaned, the second control valve 440 is opened.

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

[0081] After the control component receives the cleaning instruction, the control component controls the driving component to drive one of the cleaning liquid pipeline 220 and the injection needle 130 to move, so that the cleaning liquid pipeline 220 is connected to the injection needle 130. At the same time, the control component controls the conversion 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 the first control valve 240 and the second control valve 440. After receiving the cleaning instruction, the control component controls the opening of the first control valve 240 and the second control valve 440. After the cleaning is completed, the first control valve 240 is controlled to be closed, and after waiting for a period of time so that the cleaning liquid in the injection tube 120 and the injection needle 130 are pumped into the residual liquid tank 230, the second control valve 440 is controlled to be closed.

[0083] Based on the above embodiments, refer to Figure 2 , Figure 2 The present application also provides a flow chart of a control method for a liquid injection device. Figure 1 , the method comprising:

[0084] S101, responding to a received manual cleaning instruction, obtaining status information of a liquid injection device;

[0085] The manual cleaning instruction refers to the cleaning instruction received by the liquid injection device during manual operation. The status information of the liquid injection device includes the status information of the liquid injection plate, the safety condition of the liquid injection device and the status information of the cleaning liquid tank 210 .

[0086] S102: If the status information of the liquid injection device meets the preset cleaning conditions, the liquid injection device is controlled to enter the cleaning process.

[0087] The state information of the injection plate satisfies the preset cleaning condition, which means that there is no battery on the injection plate and the safety condition is met, etc. The state information of the cleaning liquid tank 210 satisfies the preset cleaning condition, which means that the amount of cleaning liquid in the cleaning liquid tank 210 is sufficient, etc.

[0088] Reference Figure 3 , Figure 3 The present application also provides a flow chart of a control method for a liquid injection device. Figure 2 , the method comprising:

[0089] S201, responding to the received automatic cleaning instruction, obtaining the status information of the liquid injection plate;

[0090] The automatic cleaning instruction refers to the cleaning instruction received by the liquid injection device during automatic operation.

[0091] S202, after waiting for the status information of the liquid injection plate to meet the preset cleaning conditions, control the liquid injection equipment to enter the cleaning process.

[0092] Among them, when the liquid injection device is in automatic operation, it waits for the status information of the liquid injection plate to meet the cleaning condition, which means that after the liquid injection plate completes a liquid injection process, there is no battery on the liquid injection plate. At this time, the liquid injection device can be controlled to enter the cleaning process.

[0093] Reference Figure 4 , Figure 4 The present application also provides a flow chart of a control method for a liquid injection device. Figure 3 , the method comprising:

[0094] S301, obtaining 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 plate has been cleaned before, the working time refers to the time from the last cleaning process of the injection plate to the end.

[0096] S302: if the working time is greater than or equal to the first preset time, obtain the status information of the liquid injection plate;

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

[0098] S303, after waiting for the status information of the liquid injection plate to meet the preset cleaning conditions, control the liquid injection device to enter the cleaning process.

[0099] Among them, waiting for the state information of the injection plate to meet the cleaning condition means that after the injection plate completes a liquid injection process, there is no battery on the injection plate. At this time, the injection device can be controlled to enter the cleaning process.

[0100] Reference Figure 5 , Figure 5 The present application also provides a flow chart of a control method for a liquid injection device. Figure 4 , the method comprising:

[0101] S401, controlling the driving assembly to drive at least one of the cleaning liquid pipeline 220 and the liquid injection plate to be cleaned to move, so that the cleaning liquid pipeline 220 is connected to the liquid injection needle 130, and controlling the first control valve 240 to open;

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

[0103] The first control valve 240 is disposed on the cleaning liquid pipeline 220 to connect or disconnect the cleaning liquid pipeline 220 . When the first control valve 240 is opened, the cleaning liquid can flow into the injection needle 130 through the cleaning liquid pipeline 220 .

[0104] S402, controlling the conversion assembly 300 to switch the liquid injection plate to a cleaning state, and controlling the second control valve 440 to open;

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

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

[0107] S403, obtaining the cleaning time of the liquid injection plate;

[0108] The cleaning time of the injection plate refers to the time from the start of the cleaning process.

[0109] S404: If the cleaning time is greater than or equal to the second preset time, the first control valve 240 is controlled to be closed.

[0110] Among them, when the cleaning time is greater than or equal to the second preset time, it means that the electrolyte crystals in the injection tube 120 and the injection needle 130 have been completely cleaned. At this time, the first control valve 240 is controlled to close, and the cleaning liquid is stopped from being input into the injection needle 130.

[0111] It is understandable that the second preset time can be adaptively set according to actual needs.

[0112] S405, obtaining the time until the first control valve 240 is closed;

[0113] The time until the first control valve 240 is closed refers to the time for the cleaning liquid in the injection tube 120 and the injection needle 130 to be extracted through the vacuum tank 410 after the first control valve 240 is closed.

[0114] S406, if the time from the closing of the first control valve 240 is greater than or equal to the third preset time, control the second control valve 440 to close;

[0115] If the time from the closing of the first control valve 240 is greater than or equal to the third preset time, it means that the cleaning liquid in the injection tube 120 and the injection needle 130 has been completely pumped into the residual liquid tank 230. At this time, the second control valve 440 is controlled to close, thereby stopping the further extraction of the cleaning liquid in the injection tube 120 and the injection needle 130. At this time, the cleaning process is completed.

[0116] It is understandable that the third preset time can be adaptively set according to actual needs.

[0117] S407, controlling the driving assembly to drive the cleaning liquid pipeline 220 and the liquid injection plate to reset, and controlling the conversion assembly 300 to switch the liquid injection plate to the liquid injection state.

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

[0119] The terms "first", "second", etc. in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present application described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0120] In the embodiments of the present application, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have specific orientations, or to be constructed and operated in specific orientations. Moreover, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present application can be understood according to the specific circumstances.

[0121] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" 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, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

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

[0123] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the scope of the present application is limited only by the appended claims.

Claims

1. A liquid injection device, characterized in that: include: A liquid injection assembly (100), the liquid injection assembly (100) comprising an electrolyte tank (110) and a plurality of liquid injection plates, the electrolyte tank (110) being used to store electrolyte, the liquid injection plates being provided with liquid injection tubes (120) and liquid injection needles (130) in communication with each other; A cleaning liquid assembly (200), the cleaning liquid assembly (200) comprising a cleaning liquid tank (210), a cleaning liquid pipeline (220) and a residual liquid tank (230), the cleaning liquid tank (210) being used to store cleaning liquid, and one end of the cleaning liquid pipeline (220) being in communication with the cleaning liquid tank (210); a conversion assembly (300), the conversion assembly (300) being used to switch the liquid injection plate between a liquid injection state and a cleaning state, wherein in the liquid injection state, the liquid injection pipe (120) is in communication with the electrolyte tank (110), and in the cleaning state, the liquid injection pipe (120) is in communication with the residual liquid tank (230); A driving component is used to drive the cleaning liquid pipeline (220) and at least one of the liquid injection plate to be cleaned to move in the cleaning state, so that the other end of the cleaning liquid pipeline (220) is connected to the liquid injection needle (130) of the liquid injection plate to be cleaned.

2. The liquid injection device according to claim 1, characterized in that: The driving assembly comprises a first driving member, and the first driving member drives the cleaning liquid pipeline (220) to move relative to the injection needle (130).

3. The liquid injection device according to claim 1, characterized in that: The driving assembly comprises a second driving member, and the second driving member drives the injection needle (130) to move towards the cleaning liquid pipeline (220).

4. The liquid injection device according to claim 1, characterized in that: The cleaning liquid assembly (200) further comprises a first control valve (240), and the first control valve (240) is arranged on the cleaning liquid pipeline (220).

5. The liquid injection device according to any one of claims 1 to 4, characterized in that: It also includes a vacuum component (400), wherein the vacuum component (400) includes a vacuum tank (410), and the vacuum tank (410) is in communication with the residual liquid tank (230).

6. The liquid injection device according to claim 5, characterized in that: The vacuum assembly (400) further comprises a first vacuum pipeline (420) and a second vacuum pipeline (430), wherein the first vacuum pipeline (420) is connected to the vacuum tank (410) and the residual liquid tank (230), and the second vacuum pipeline (430) is used to connect the conversion assembly (300) and the residual liquid tank (230).

7. The liquid injection device according to claim 6, characterized in that: The vacuum assembly (400) further comprises a second control valve (440), wherein the second control valve (440) is arranged on the first vacuum pipeline (420).

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

9. A control method for a liquid injection device, used for the liquid injection device according to any one of claims 1 to 8, characterized in that: include: In response to the received cleaning instruction, control the liquid injection equipment to enter the cleaning process; Alternatively, the working time of the liquid injection plate is obtained, and if the working time is greater than or equal to a first preset time, the liquid injection device is controlled to enter the cleaning process; The control of the liquid injection device to enter the cleaning process includes: controlling the conversion component (300) to switch the liquid injection plate to be cleaned to a cleaning state, controlling the drive component to drive the cleaning liquid pipeline (220) and at least one of the liquid injection plate to be cleaned to move, so that the cleaning liquid pipeline (220) is connected to the liquid injection needle (130) of the liquid injection plate to be cleaned, and controlling the first control valve (240) to open.

10. The method according to claim 9, characterized in that The step of responding to the received cleaning instruction and controlling the liquid injection device to enter the cleaning process includes: The cleaning instruction is a manual cleaning instruction, and in response to the received manual cleaning instruction, the status information of the liquid injection device is obtained; If the status information of the liquid injection device meets the preset cleaning condition, the liquid injection device is controlled to enter the cleaning process; The state information of the liquid injection equipment includes the state information of the liquid injection plate, the safety condition of the liquid injection equipment and the state information of the cleaning liquid tank; Alternatively, the cleaning instruction is an automatic cleaning instruction, and in response to the received automatic cleaning instruction, the status information of the liquid injection plate is obtained; After waiting for the status information of the liquid injection plate to meet the preset cleaning conditions, the liquid injection device is controlled to enter the cleaning process.

11. The method according to claim 9, characterized in that The step of obtaining the working time of the liquid injection plate and controlling the liquid injection device to enter a cleaning process if the working time is greater than or equal to a first preset time includes: Acquire the working time of the injection plate, and if the working time is greater than or equal to the first preset time, acquire the status information of the injection plate; After waiting for the status information of the liquid injection plate to meet the preset cleaning conditions, the liquid injection device is controlled to enter the cleaning process.

12. The method according to any one of claims 9 to 11, characterized in that: Also includes: Obtaining the time when the liquid injection device enters the cleaning process; If the time of entering the cleaning process is greater than or equal to the second preset time, the first control valve (240) is controlled to be closed.

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