Liquid injection system

Abstract

The utility model relates to the technical field of battery production equipment, and discloses a liquid injection system which comprises a container, a liquid injection machine, a liquid delivery pipe, a spectrograph, a first control valve and a control device, and the liquid delivery pipe is connected with the container and the liquid injection machine; the detection end of the spectrograph faces the infusion tube, the spectrograph is electrically connected with the control device, and the spectrograph is used for detecting electrolyte components and transmitting a detection result to the control device; the first control valve is arranged on the infusion tube, is positioned on one side, far away from the container, of the detection end of the spectrograph, and is electrically connected with the control device; the control device is configured to control the first control valve to be opened and closed according to the detection result of the spectrograph, the control device judges whether the electrolyte component information is correct or not, if yes, the first control valve is controlled to be opened, otherwise, the first control valve is kept in a closed state, and therefore the electrolyte cannot be conveyed to the liquid injection machine; and mistaken electrolyte filling or poor-quality electrolyte filling of the battery cell can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production equipment, in particular to a liquid injection system. Background Art

[0002] The electrolyte is an important component of the battery cell. Different battery cells will be injected with different electrolytes. In the related art, usually, the factory identification code of the electrolyte is manually checked to determine whether the used electrolyte is suitable for the battery cell, so as to avoid mis-injecting the electrolyte into the battery cell. However, such manual operation cannot identify whether the composition of the electrolyte has changed, and cannot effectively guarantee the processing quality of the battery cell. Summary of the Utility Model

[0003] The primary object of the utility model is to provide a liquid injection system, which can avoid mis-injecting the electrolyte or injecting poor-quality electrolyte into the battery cell, and effectively guarantee the processing quality of the battery cell.

[0004] To achieve the above object, the utility model provides a liquid injection system, which includes a container, a liquid injector, a liquid delivery pipe, a spectrometer, a first control valve and a control device. The container is used for storing the electrolyte, and the liquid injector is used for injecting the electrolyte into the battery cell;

[0005] The liquid delivery pipe connects the container and the liquid injector;

[0006] The detection end of the spectrometer faces the liquid delivery pipe. The spectrometer is electrically connected to the control device, and the spectrometer is used for detecting the composition of the electrolyte and transmitting the detection result to the control device;

[0007] The first control valve is arranged on the liquid delivery pipe, and the first control valve is located on the side of the detection end of the spectrometer away from the container. The first control valve is electrically connected to the control device;

[0008] The control device is configured to be able to control the opening and closing of the first control valve according to the detection result of the spectrometer.

[0009] In a specific embodiment of the utility model, the liquid delivery pipe includes a first pipe section, a second pipe section and a third pipe section. The input end of the first pipe section is connected to the container, the output end of the first pipe section is connected to the input end of the second pipe section, the output end of the second pipe section is connected to the input end of the third pipe section, and the output end of the third pipe section is connected to the liquid injector;

[0010] The detection end of the spectrometer faces the second pipe section;

[0011] The first control valve is arranged on the second pipe section or the third pipe section.

[0012] In a specific embodiment of the present utility model, the first pipe section is detachably connected to the top surface of the container, and along the height direction of the container, the second pipe section is lower than the top surface of the container.

[0013] In a specific embodiment of the present utility model, it further includes a second control valve, the second control valve is arranged on the first pipe section, the second control valve is electrically connected to the control device, and the control device is configured to be able to control the opening and closing of the second control valve according to the detection result of the spectrometer.

[0014] In a specific embodiment of the present utility model, it further includes an alarm module, the alarm module is electrically connected to the control device, and the control device is configured to be able to control the operation of the alarm module according to the detection result of the spectrometer.

[0015] In a specific embodiment of the present utility model, it further includes a weighing module and an alarm module;

[0016] The weighing module abuts against the bottom surface of the container;

[0017] The weighing module and the alarm module are both electrically connected to the control device, and the control device is configured to be able to control the operation of the alarm module according to the signal of the weighing module.

[0018] In a specific embodiment of the present utility model, it further includes a nitrogen gas connector, and the nitrogen gas connector is installed on the top surface of the container.

[0019] In a specific embodiment of the present utility model, a bar code is provided on the outer peripheral wall of the container, and the bar code includes information of the electrolyte stored in the container;

[0020] The liquid injection system further includes a bar code scanner, the bar code scanner is electrically connected to the control device, and the bar code scanner is used to scan the bar code to obtain electrolyte information and upload the electrolyte information to the control device.

[0021] In a specific embodiment of the present utility model, it further includes a pipeline support module, and at least part of the infusion pipe is arranged on the pipeline support module.

[0022] In a specific embodiment of the present utility model, the pipeline support module includes a bracket and a support through groove, the support through groove is arranged on the bracket, and at least part of the infusion pipe is arranged on the support through groove.

[0023] The liquid injection system according to an embodiment of the present utility model, compared with the prior art, has the beneficial effects that:

[0024] For the liquid injection system of the present utility model, the control device stores the composition information of the electrolyte corresponding to the cell model. Before injecting the electrolyte into the cell, the first control valve is in a closed state, and the first control valve intercepts the electrolyte output from the container. The spectrometer detects and analyzes the electrolyte in the infusion tube to obtain the composition information of the electrolyte, and uploads the composition information (detection result) of the electrolyte to the control device. Thereafter, the control device compares the electrolyte composition information with the stored electrolyte composition information. If the two are consistent, the control device opens the first control valve to enable the smooth progress of the cell liquid injection operation. If the two are inconsistent, it indicates that the electrolyte composition in the container is not suitable for the cell or the electrolyte composition has changed. At this time, the first control valve remains in the closed state. Thus, the electrolyte cannot be transported to the liquid injector, which can avoid the incorrect injection of the electrolyte into the cell or the injection of poor-quality electrolyte, effectively ensuring the processing quality of the cell. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the liquid injection system according to an embodiment of the present utility model;

[0026] Figure 2 is a schematic structural diagram of the cooperation of the container, infusion tube, first control valve, second control valve and spectrometer according to an embodiment of the present utility model.

[0027] In the figure, 1 is the container; 101 is the barcode; 2 is the liquid injector; 3 is the infusion tube; 31 is the first pipe section; 32 is the second pipe section; 33 is the third pipe section; 4 is the spectrometer; 5 is the control device; 6 is the alarm module; 7 is the weighing module; 8 is the barcode scanner; 9 is the pipe support module; 91 is the bracket; 92 is the support through groove; 100 is the first control valve; 200 is the second control valve; 300 is the nitrogen joint. Detailed Embodiment

[0028] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0029] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0030] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" shall be construed broadly. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection, a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0031] In the present application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0032] Such as Figure 1As shown in the figure, a liquid injection system according to a preferred embodiment of the present utility model includes a container 1, a liquid injector 2, an infusion tube 3, a spectrometer 4, a first control valve 100, and a control device 5. The container 1 is used to store electrolyte, and the liquid injector 2 is used to inject electrolyte into the battery cell. The infusion tube 3 connects the container 1 and the liquid injector 2. The detection end of the spectrometer 4 faces the infusion tube 3, and the spectrometer 4 is electrically connected to the control device 5. The spectrometer 4 is used to detect the components of the electrolyte and transmit the detection results to the control device 5. The first control valve 100 is provided on the infusion tube 3, and the first control valve 100 is located on the side of the detection end of the spectrometer 4 away from the container 1. The first control valve 100 is electrically connected to the control device 5. The control device 5 is configured to be able to control the opening and closing of the first control valve 100 according to the detection results of the spectrometer 4.

[0033] In practical applications, the control device 5 stores the component information of the electrolyte corresponding to the battery cell model to be injected with liquid. Before injecting liquid into the battery cell, the first control valve 100 is in a closed state, and the first control valve 100 intercepts the electrolyte output from the container 1. The spectrometer 4 detects and analyzes the electrolyte in the infusion tube 3 to obtain the component information of the electrolyte, and uploads the component information (detection results) of the electrolyte to the control device 5. Thereafter, the control device 5 compares the electrolyte component information with the stored electrolyte component information. If the two are consistent, the control device 5 controls the first control valve 100 to open to enable the battery cell liquid injection work to proceed smoothly. If the two are inconsistent, it indicates that the electrolyte component in the container 1 is not suitable for the battery cell or the electrolyte component has changed. At this time, the first control valve 100 remains in the closed state. Thus, the electrolyte cannot be transported to the liquid injector 2, which can avoid misinjecting the electrolyte into the battery cell or injecting poor-quality electrolyte, effectively ensuring the processing quality of the battery cell.

[0034] Among them, the detection end of the spectrometer 4 includes an optical path system and a detector. The detector is a component in the spectrometer 4 used to receive and measure optical signals. It can convert optical signals into electrical signals and output them to the data processing system of the spectrometer 4. The data processing system of the spectrometer 4 processes and analyzes the electrical signals output by the detector to obtain the spectral information of the electrolyte components. The control device 5 includes a host computer and a slave computer. The first control valve 100 is electrically connected to the slave computer, the slave computer is electrically connected to the host computer, the host computer stores the spectral information of the electrolyte components corresponding to the battery cell model, and the data processing system of the spectrometer 4 is electrically connected to the host computer. The above spectrometer 4 and control device 5 are both prior arts, and the present application will not elaborate on them too much. Thus, in practical applications, the optical path system and the detector are respectively located on both sides of the infusion tube 3 along its conveying direction, and both face the infusion tube 3. The spectrometer 4 uploads the spectral information of the analyzed electrolyte components to the host computer for comparison. Then, the host computer sends the corresponding control instructions to the slave computer according to the comparison results, and the slave computer controls the opening and closing of the first control valve 100.

[0035] Furthermore, as Figure 2 shown, the infusion tube 3 includes a first tube section 31, a second tube section 32, and a third tube section 33. The input end of the first tube section 31 is connected to the container 1, the output end of the first tube section 31 is connected to the input end of the second tube section 32, the output end of the second tube section 32 is connected to the input end of the third tube section 33, and the output end of the third tube section 33 is connected to the liquid injection machine 2; the detection end of the spectrometer 4 faces the second tube section 32; the first control valve 100 is disposed on the second tube section 32. Thus, by setting the second tube section 32 at a suitable position, the second tube section 32 can be matched with the spectrometer 4.

[0036] Optionally, the first control valve 100 can also be disposed on the third tube section 33, which can also play a role in stopping the electrolyte in the infusion tube 3 and preventing the electrolyte from being directly delivered to the liquid injection machine 2.

[0037] In addition, the electrolyte output from the container 1 will inevitably carry bubbles, and the presence of bubbles will affect the detection accuracy of the spectrometer 4. Thus, as Figure 2 shown, the first tube section 31 is connected to the top surface of the container 1. Along the height direction of the container 1, the second tube section 32 is lower than the top surface of the container 1. Based on this structure of the infusion tube 3, during the process that the electrolyte output from the container 1 flows through the first tube section 31 to the second tube section 32, the bubbles will float upward. That is, there are basically no bubbles in the electrolyte in the second tube section 32. Thus, the influence of bubbles on the detection accuracy of the spectrometer 4 can be prevented.

[0038] In this application, the first tube section 31 is detachably connected to the container 1. After it is detected that the electrolyte component in the container 1 is not suitable for the battery cell or the electrolyte component has changed, it is necessary to replace the electrolyte with a suitable one. The operation of replacing the electrolyte is as follows: first, detach the first tube section 31 from the container 1, then pour out the electrolyte in the first tube section 31 and the second tube section 32, and then install the first tube section 31 into the container 1 storing the new electrolyte; thereafter, repeat the above process of analyzing and comparing the electrolyte components to avoid mis-filling the battery cell with electrolyte or filling with electrolyte of poor quality.

[0039] Since it is necessary to pour out the electrolyte in the infusion tube 3 from one end of the first tube section 31 when replacing the electrolyte, and in order to avoid polluting the production environment with the electrolyte, the electrolyte should be poured into a designated collection tray. Therefore, further, as Figure 1 and Figure 2As shown in the figure, the liquid injection system further includes a second control valve 200. The second control valve 200 is disposed on the first pipe segment 31 and is electrically connected to the control device 5. The control device 5 is configured to control the opening and closing of the second control valve 200 according to the detection result of the spectrometer 4. Specifically, the second control valve 200 is normally open and is electrically connected to the aforementioned lower computer. If the electrolyte component information in the second pipe segment 32 is inconsistent with the stored electrolyte component information, then the upper computer sends a control instruction to the lower computer, and the lower computer controls the second control valve 200 to close. Thus, before the infusion tube 3 is transferred to the designated collecting liquid tray, the electrolyte will not pour out from the infusion tube 3, which can avoid polluting the production environment with the electrolyte. The opening of the second control valve 200 can be manually controlled by the staff, or a sensor is provided on the collecting liquid tray. The sensor is electrically connected to the upper computer. When the infusion tube 3 moves to a preset position and is sensed by the sensor, the upper computer sends a control instruction to the lower computer, and the lower computer controls the second control valve 200 to open, so as to ensure that the electrolyte can pour out smoothly from the infusion tube 3. This application does not limit this.

[0040] In this application, as Figure 1 shown in the figure, the liquid injection system further includes an alarm module 6. The alarm module 6 is electrically connected to the control device 5. The control device 5 is configured to control the operation of the alarm module 6 according to the detection result of the spectrometer 4. Specifically, the alarm module 6 is electrically connected to the aforementioned lower computer. If the electrolyte component information in the second pipe segment 32 is inconsistent with the stored electrolyte component information, then the upper computer sends a control instruction to the lower computer, and the lower computer controls the alarm module 6 to emit an alarm signal to remind the staff to check whether the electrolyte is added incorrectly or deteriorated. The alarm module 6 can be a warning light and / or an alarm. This application does not limit this.

[0041] Furthermore, as Figure 1 shown in the figure, the liquid injection system further includes a weighing module 7. The weighing module 7 abuts against the bottom surface of the container 1. The weighing module 7 is electrically connected to the control device 5. The control device 5 is configured to control the operation of the alarm module 6 according to the signal of the weighing module 7. Specifically, the weighing module 7 mainly uses a weighing sensor, such as a weighing scale. In practical applications, if the weighing module 7 detects that the weight of the container 1 has decreased by a preset amount, then the upper computer sends a control instruction to the lower computer, and the lower computer controls the alarm module 6 to emit an alarm signal to prompt the staff to replace the container 1. The aforementioned preset amount is set according to actual applications. This application does not limit this.

[0042] In this application, the liquid injection system further includes a nitrogen connector 300. The nitrogen connector 300 is installed on the top surface of the container 1. In practical applications, the nitrogen connector 300 is connected to a nitrogen supply assembly, and the nitrogen supply assembly inputs nitrogen into the container 1 so that the electrolyte in the container 1 is output to the liquid injector 2 through the infusion tube 3.

[0043] Furthermore, a barcode 101 is provided on the outer wall of the container 1, and the barcode 101 includes information about the electrolyte stored in the container 1; the liquid injection system also includes a barcode scanner 8, which is electrically connected to the control device 5. The barcode scanner 8 is used to scan the barcode 101 to obtain electrolyte information and upload the electrolyte information to the control device 5. In actual applications, the electrolyte information matched by the current battery cell can be set by the host computer, and then the current container 1 is scanned by the barcode scanner 8 to upload the information of the electrolyte in the current container 1 to the control device 5. The control device 5 makes a pre-judgment on the composition of the electrolyte to be added, so as to confirm in advance whether the electrolyte in the current container 1 matches the current battery cell, avoid incorrect electrolyte filling of the battery cell, and ensure the processing quality of the battery cell.

[0044] In addition, the control module can also input and store the information of the electrolyte in the container 1 through the barcode scanner 8. The information of the electrolyte includes but is not limited to the batch of electrolyte, purchase time, validity period, etc.

[0045] Further, such as Figure 1 As shown, the injection system also includes a pipeline support module 9, and the infusion tube 3 is at least partially arranged on the pipeline support module 9, thereby making the arrangement of the infusion tube 3 stable and reducing unnecessary shaking of the infusion tube 3. As a specific implementation of this embodiment, the pipeline support module 9 includes a bracket 91 and a support groove 92, the support groove 92 is arranged on the bracket 91, and the infusion tube 3 is at least partially arranged on the support groove 92. The pipeline support module 9 of this structure has a simple structure and can effectively support the infusion tube 3. Specifically, the bottom surface of the groove of the support groove 92 is provided with a through hole for the infusion tube 3 to pass through, and the third pipe section 33 of the infusion tube 3 extends from the bottom of the support groove 92 through the through hole to the groove of the support groove 92, and then extends from one of the open ends of the support groove 92 to connect to the injection machine 2.

[0046] In the present application, the above-mentioned electrical connection can be a wired signal transmission connection or a wireless signal transmission connection, and the present application does not impose any limitation on this.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A liquid injection system, characterized in that: It comprises a container (1), a liquid injection machine (2), a liquid infusion tube (3), a spectrometer (4), a first control valve (100) and a control device (5), wherein the container (1) is used to store electrolyte, and the liquid injection machine (2) is used to inject electrolyte into the battery cell; The infusion tube (3) connects the container (1) and the injection machine (2); The detection end of the spectrometer (4) faces the infusion tube (3), the spectrometer (4) is electrically connected to the control device (5), and the spectrometer (4) is used to detect the components of the electrolyte and transmit the detection results to the control device (5); The first control valve (100) is arranged on the infusion tube (3), and the first control valve (100) is located on a side of the detection end of the spectrometer (4) away from the container (1), and the first control valve (100) is electrically connected to the control device (5); The control device (5) is configured to control the opening and closing of the first control valve (100) according to the detection result of the spectrometer (4).

2. The liquid injection system according to claim 1, characterized in that: The infusion tube (3) comprises a first tube section (31), a second tube section (32) and a third tube section (33); the input end of the first tube section (31) is connected to the container (1); the output end of the first tube section (31) is connected to the input end of the second tube section (32); the output end of the second tube section (32) is connected to the input end of the third tube section (33); and the output end of the third tube section (33) is connected to the liquid injection machine (2); The detection end of the spectrometer (4) faces the second tube section (32); The first control valve (100) is arranged on the second pipe section (32) or the third pipe section (33).

3. The liquid injection system according to claim 2, characterized in that: The first pipe section (31) is detachably connected to the top surface of the container (1), and along the height direction of the container (1), the second pipe section (32) is lower than the top surface of the container (1).

4. The liquid injection system according to claim 3, characterized in that: The invention also comprises a second control valve (200), wherein the second control valve (200) is arranged on the first pipe section (31), the second control valve (200) is electrically connected to the control device (5), and the control device (5) is configured to control the opening and closing of the second control valve (200) according to the detection result of the spectrometer (4).

5. The liquid injection system according to claim 1, characterized in that: It also comprises an alarm module (6), the alarm module (6) being electrically connected to the control device (5), and the control device (5) being configured to control the operation of the alarm module (6) according to the detection result of the spectrometer (4).

6. The liquid injection system according to claim 1, characterized in that: It also includes a weighing module (7) and an alarm module (6); The weighing module (7) abuts against the bottom surface of the container (1); The weighing module (7) and the alarm module (6) are both electrically connected to the control device (5), and the control device (5) is configured to control the alarm module (6) to operate according to a signal from the weighing module (7).

7. The liquid injection system according to claim 1, characterized in that: It also includes a nitrogen connector (300), which is installed on the top surface of the container (1).

8. The liquid injection system according to claim 1, characterized in that: A barcode (101) is provided on the outer peripheral wall of the container (1), and the barcode (101) includes information about the electrolyte stored in the container (1); The liquid injection system further comprises a barcode scanning gun (8), wherein the barcode scanning gun (8) is electrically connected to the control device (5), and the barcode scanning gun (8) is used to scan the barcode (101) to obtain electrolyte information, and upload the electrolyte information to the control device (5).

9. The liquid injection system according to any one of claims 1 to 8, characterized in that: It also comprises a pipeline support module (9), and the infusion tube (3) is at least partially arranged on the pipeline support module (9).

10. The liquid injection system according to claim 9, characterized in that: The pipeline support module (9) comprises a support (91) and a support through groove (92), wherein the support through groove (92) is arranged on the support (91), and the infusion tube (3) is at least partially arranged on the support through groove (92).

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