Fixed-point marking device for lithium battery diaphragm

Abstract

The utility model relates to a fixed-point marking device for a lithium battery diaphragm. Relates to the technical field of new energy batteries. The diaphragm spraying device specifically comprises a conveying mechanism used for conveying diaphragms and a spraying mechanism arranged above the conveying mechanism, and the area, located under the spraying mechanism, of the conveying mechanism forms a spraying area; the conveying mechanism conveys the diaphragm to the spraying area, and the spraying mechanism is used for forming a positioning mark on the diaphragm in the spraying area. The diaphragm spraying device comprises the conveying mechanism and the spraying mechanism, the conveying mechanism is used for conveying a diaphragm, the spraying mechanism is arranged above the conveying mechanism, a spraying area is formed in the area, located under the spraying mechanism, of the conveying mechanism, and the spraying mechanism forms a positioning mark on the diaphragm located in the spraying area, so that in the winding process of the diaphragm, the positioning mark is located in the spraying area. The positioning mark at the tail end of the diaphragm is accurately recognized through the recognition device on the winding machine, the diaphragm can be conveniently and rapidly replaced, the production efficiency is improved, the structure is simple, implementation is easy, and therefore the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, in particular to a fixed-point marking device for a lithium battery diaphragm. Background Art

[0002] In the production process of lithium-ion batteries, the manufacture and assembly of diaphragms is one of the key steps. The main function of the diaphragm is to prevent direct contact between the positive and negative electrodes of the battery, thereby avoiding short circuits, while allowing ions to pass through so that the battery can work properly. The manufacturing process of the diaphragm generally includes multiple steps, among which winding is the last process, in which the cut diaphragm is wound into a diaphragm roll of a certain length to facilitate subsequent battery assembly.

[0003] When the diaphragm is wound by a winder, it is necessary to be able to accurately identify the tail of the diaphragm, so as to facilitate the rapid replacement of the diaphragm and improve production efficiency. At present, battery manufacturers mainly use the meter counter of the winder to control the length of the diaphragm to achieve the purpose of identifying the tail of the diaphragm. However, for diaphragms with a length of more than 2000 meters, the meter counter has low accuracy, resulting in inaccurate identification of the tail of the diaphragm, thus affecting production efficiency. Although the use of more accurate laser ranging or photoelectric sensors can solve this problem, their installation, use and maintenance costs are high and cannot meet the current production needs. Utility Model Content

[0004] The purpose of the utility model is to provide a fixed-point marking device for a lithium battery diaphragm in response to the deficiencies of the above-mentioned prior art, which can perform fixed-point marking on the lithium battery diaphragm, so as to achieve accurate identification of the tail of the diaphragm when the diaphragm is wound, facilitate rapid replacement of the diaphragm, improve production efficiency, and has a simple structure and is easy to implement, thereby reducing production costs.

[0005] The utility model proposes a fixed-point marking device for a lithium battery diaphragm, comprising a conveying mechanism for conveying the diaphragm, and a spraying mechanism arranged above the conveying mechanism, wherein the area directly below the spraying mechanism forms a spraying area; the conveying mechanism conveys the diaphragm to the spraying area, and the spraying mechanism is used to form a positioning mark on the diaphragm in the spraying area.

[0006] Furthermore, the spraying mechanism includes an ink storage tank for storing ink, an ink driving component for conveying ink, and an ink nozzle for spraying ink. The ink driving component conveys the ink in the ink storage tank to the ink nozzle. The spraying area is formed in the area where the conveying mechanism is located directly below the ink nozzle. The ink sprayed from the ink nozzle forms the positioning mark on the diaphragm of the spraying area.

[0007] Furthermore, the fixed-point marking device also includes a drying mechanism disposed on one side of the spraying area, and the drying mechanism is used to quickly solidify the ink on the diaphragm.

[0008] Furthermore, the drying mechanism includes a hot air box arranged on one side of the spraying area, a hot air fan for providing hot air to the hot air box, and a hot air duct connecting the hot air fan and the hot air box. The hot air box is provided with an air outlet, and the air outlet is directly opposite to the spraying area.

[0009] Furthermore, the positioning mark is formed on the adhesive layer of the diaphragm.

[0010] Furthermore, the fixed-point marking device also includes a diaphragm detection component arranged on the conveying mechanism, and the diaphragm detection component is used to detect whether the diaphragm reaches the spraying area.

[0011] Furthermore, the diaphragm detection assembly includes a proximity switch located at one side of the spraying area, and a switch seat for fixing the proximity switch on the conveying mechanism.

[0012] Furthermore, the conveying mechanism includes a conveying platform and a conveyor belt arranged on the conveying platform, the conveyor belt conveys the diaphragm forward, the conveying platform is provided with a limiting groove for limiting the diaphragm, and the conveyor belt is arranged at the bottom of the limiting groove.

[0013] Furthermore, the spraying mechanism also includes a support frame, the ink nozzle is mounted on the support frame, and the support frame is used to mount the ink nozzle above the conveying mechanism.

[0014] Furthermore, a slide groove is provided on the support frame, and the slide groove is vertically arranged with respect to the conveying mechanism, and the ink nozzle can move along the slide groove on the support frame.

[0015] The utility model provides a fixed-point marking device for a lithium battery separator, which has the following gain effects:

[0016] (1) The fixed-point marking device includes a conveying mechanism and a spraying mechanism. The conveying mechanism is used to convey the diaphragm. The spraying mechanism is arranged above the conveying mechanism. A spraying zone is formed in the area where the conveying mechanism is located directly below the spraying mechanism. When the conveying mechanism conveys the diaphragm to the spraying zone, the conveying mechanism stops running. The spraying mechanism forms a positioning mark on the diaphragm located in the spraying zone, so that the positioning mark at the tail end of the diaphragm can be accurately identified by the identification device on the winding machine, which is convenient for quickly replacing the diaphragm and improving production efficiency. The structure is simple and easy to implement, thereby reducing production costs.

[0017] (2) The spraying mechanism of the fixed point marking device includes an ink storage tank, an ink driving member and an ink nozzle. The ink storage tank is used to store ink. The ink driving member transports the ink in the ink storage tank to the ink nozzle. The spraying area is formed in the area where the transport mechanism is located directly below the ink nozzle. Therefore, the ink is sprayed out through the ink nozzle to form a positioning mark at the rear end of the diaphragm.

[0018] (3) The fixed-point marking device also includes a drying mechanism, which is arranged on one side of the conveying mechanism and directly opposite to the spraying area on the conveying mechanism. The drying mechanism dries the ink on the diaphragm to make it solidify quickly, which can not only speed up the subsequent diaphragm winding process, but also make the positioning mark formed on the diaphragm more solid, thereby further improving production efficiency;

[0019] (4) The drying mechanism of the fixed-point marking device includes a hot air box, a hot air blower and a hot air duct. The hot air blower is used to provide hot air. The hot air duct connects the hot air blower and the hot air box, so that the hot air provided by the hot air blower is transported to the hot air box through the hot air duct. Then, when the hot air blower is started, the hot air is blown out through the air outlet on the hot air box to dry the ink on the diaphragm and make it solidify quickly.

[0020] (5) After the ink is ejected from the ink nozzle, the ink is sprayed on the adhesive layer at the tail end of the diaphragm, so that the positioning mark is formed on the adhesive layer at the tail end of the diaphragm, thereby making the positioning mark formed on the diaphragm more solid, thereby preventing the positioning mark from falling off in subsequent processes and affecting the identification of the tail end of the diaphragm, thereby further improving production efficiency;

[0021] (6) A slide groove is provided on the support frame of the fixed-point marking device, and the slide groove is vertically arranged to the conveying platform. By moving the ink nozzle along the slide groove on the support frame, the ink nozzle is moved along the width direction of the rear end of the diaphragm, and ink is sprayed at multiple positions, so that the ink is completely distributed in the width direction of the rear end of the diaphragm, that is, the formed positioning mark is only completely distributed in the width direction of the rear end of the diaphragm, which makes it easy for the identification device on the winding machine to accurately identify the positioning mark at the rear end of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the utility model and, together with the description, are used to explain the principle of the utility model. In the accompanying drawings, like reference numerals are used to represent like elements.

[0023] Figure 1 This is a schematic structural diagram of a fixed-point marking device for a lithium battery separator according to an embodiment of the utility model;

[0024] Figure 2This is a schematic structural diagram of a support frame of a lithium battery diaphragm fixed-point marking device according to an embodiment of the utility model, in which an ink nozzle is mounted above a conveying mechanism;

[0025] Figure 3 It is a cross-sectional schematic diagram of the cooperation between the ink nozzle of a fixed-point marking device for a lithium battery diaphragm and the slide groove of a support frame according to an embodiment of the utility model;

[0026] Figure 4 This is a cross-sectional schematic diagram of a positioning mark of a fixed-point marking device for a lithium battery diaphragm formed on a diaphragm according to an embodiment of the utility model.

[0027] In the figure: 1. conveying mechanism; 11. spraying area; 12. conveying platform; 121. limit groove; 13. conveyor belt; 2. ink storage tank; 3. ink driving part; 4. ink nozzle; 41. slider; 411. threaded hole; 42. bolt; 5. support frame; 51. slide groove; 52. strip hole; 6. hot air box; 61. air outlet; 7. hot air blower; 8. hot air duct; 9. diaphragm detection component; 91. proximity switch; 92. switch seat; 10. diaphragm; 101. base film; 102. coating layer; 103. glue layer; 104. positioning mark. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0029] See also Figure 1 to Figure 4 A fixed-point marking device for a lithium battery diaphragm according to an embodiment of the utility model comprises a conveying mechanism 1 for conveying a diaphragm 10, and a spraying mechanism arranged above the conveying mechanism 1. The conveying mechanism 1 is located in an area directly below the spraying mechanism to form a spraying area 11; the conveying mechanism 1 conveys the diaphragm 10 to the spraying area 11, and the spraying mechanism is used to form a positioning mark 104 on the diaphragm 10 in the spraying area 11.

[0030] In the present application, the fixed-point marking device includes a conveying mechanism 1 and a spraying mechanism, wherein the conveying mechanism 1 is used to convey the diaphragm 10, and the spraying mechanism is arranged above the conveying mechanism 1. A spraying area 11 is formed in the area where the conveying mechanism 1 is located directly below the spraying mechanism, and when the conveying mechanism 1 conveys the diaphragm 10 to the spraying area 11, the conveying mechanism 1 stops running, and the spraying mechanism forms a positioning mark 104 on the diaphragm 10 located in the spraying area 11.

[0031] Specifically, in actual implementation, the fixed-point marking device can be carried out separately from the winding process of the diaphragm 10, that is, the cut diaphragm 10 is first transported by the conveying mechanism 1 of the fixed-point marking device until the tail end of the diaphragm 10 is transported to the spraying area 11, so that the spraying mechanism forms a positioning mark 104 at the tail end of the diaphragm 10, and then the winding process of the diaphragm 10 is carried out.

[0032] In actual implementation, the fixed-point marking device can also be carried out simultaneously with the winding process of the diaphragm 10, that is, the conveying mechanism 1 of the fixed-point marking device can also be used as a diaphragm conveying mechanism in the winding process of the diaphragm 10. Specifically, the conveying mechanism 1 of the fixed-point marking device conveys the cut diaphragm 10 forward, and when the tail end of the diaphragm 10 is conveyed to the spraying area 11, the spraying mechanism forms a positioning mark 104 at the end of the diaphragm 10; and at the end of the conveying mechanism 1, the diaphragm 10 is wound into a diaphragm roll by a winding machine, completing the winding process of the diaphragm 10, thereby improving production efficiency.

[0033] It is foreseeable that: an identification device for identifying the positioning mark 104 formed in the present application is provided on the winding machine. When the winding machine winds the cut diaphragm 10 to the tail end of the diaphragm 10, the identification device accurately identifies the positioning mark 104 formed in the present application at the tail end of the diaphragm 10, thereby realizing the function of quickly replacing the diaphragm 10 through an alarm, thereby improving production efficiency. In this way, accurate identification of the tail of the diaphragm 10 is realized, the structure is simple, and it is easy to implement, thereby reducing production costs.

[0034] In this embodiment, the spraying mechanism includes an ink storage tank 2 for storing ink, an ink driving member 3 for conveying ink, and an ink nozzle 4 for ejecting ink. The ink driving member 3 conveys the ink in the ink storage tank 2 to the ink nozzle 4. The spraying area 11 is formed in the area of ​​the conveying mechanism 1 directly below the ink nozzle 4. The ink ejected from the ink nozzle 4 forms a positioning mark 104 on the diaphragm 10 of the spraying area 11. In this application, the spraying mechanism includes an ink storage tank 2, an ink driving member 3, and an ink nozzle 4. The ink storage tank 2 is used to store ink. The ink driving member 3 conveys the ink in the ink storage tank 2 to the ink nozzle 4.

[0035] Since in the present application, the spraying area 11 is formed in the area where the conveying mechanism 1 is located directly below the ink nozzle 4, when the conveying mechanism 1 transports the tail end of the diaphragm 10 to the spraying area 11, the conveying mechanism 1 stops running, and the ink is sprayed out through the ink nozzle 4, so that the ink forms a positioning mark 104 at the tail end of the diaphragm 10. Therefore, in the winding process of the diaphragm 10, the positioning mark 104 at the tail end of the diaphragm 10 is accurately identified by the identification device on the winder, and the staff is reminded to replace the diaphragm 10 by means of an alarm, thereby improving production efficiency.

[0036] Since in the present application, the positioning mark 104 at the rear end of the diaphragm 10 is formed by the ink ejected from the ink nozzle 4, in actual implementation, the identification device on the winding machine can be a high-precision CCD camera (digital camera with a charge-coupled device image sensor), so that the positioning mark 104 formed by the ink can be accurately identified, which is convenient for quickly replacing the diaphragm 10. The ink driving member 3 can be a driving pump disposed between the ink storage tank 2 and the ink nozzle 4, and the driving pump drives the ink to be transported from the ink storage tank 2 to the ink nozzle 4.

[0037] In this embodiment, the fixed-point marking device further includes a drying mechanism disposed on one side of the spraying area 11, and the drying mechanism is used to quickly solidify the ink on the diaphragm 10. In the present application, the fixed-point marking device further includes a drying mechanism, which is disposed on one side of the conveying mechanism 1 and is directly opposite to the spraying area 11 on the conveying mechanism 1. When the ink nozzle 4 sprays the ink and forms a positioning mark 104 at the tail end of the diaphragm 10 located in the spraying area 11, the drying mechanism dries the ink on the diaphragm 10 to make it quickly solidified.

[0038] On the one hand, the drying mechanism allows the ink to solidify quickly, which can speed up the subsequent winding process of the diaphragm 10, thereby improving production efficiency; on the other hand, the drying mechanism allows the ink to solidify quickly, which can make the positioning mark 104 formed on the diaphragm 10 more secure, thereby preventing the positioning mark 104 from falling off in subsequent processes and affecting the identification of the tail end of the diaphragm 10, thereby further improving production efficiency.

[0039] Specifically, in the present embodiment, the drying mechanism includes a hot air box 6 disposed on one side of the spraying area 11, a hot air blower 7 for providing hot air to the hot air box 6, and a hot air duct 8 connecting the hot air blower 7 and the hot air box 6, and an air outlet 61 is provided on the hot air box 6, and the air outlet 61 is directly opposite to the spraying area 11. In the present application, the drying mechanism includes the hot air box 6, the hot air blower 7 and the hot air duct 8, the hot air blower 7 is used to provide hot air, and the hot air duct 8 connects the hot air blower 7 with the hot air box 6, so that the hot air provided by the hot air blower 7 is transported to the hot air box 6 through the hot air duct 8.

[0040] The hot air box 6 is provided with an air outlet 61, and the air outlet 61 is directly opposite to the spraying area 11. When the ink nozzle 4 sprays the ink and forms the positioning mark 104 at the rear end of the diaphragm 10 located in the spraying area 11, the hot air blower 7 is started, and the air outlet 61 on the hot air box 6 blows out hot air to dry the ink on the diaphragm 10 and make it solidify quickly. It can be foreseen that: when the ink nozzle 4 sprays the ink and forms the positioning mark 104 at the rear end of the diaphragm 10, the hot air blower 7 stops working, thereby preventing the hot air blown out of the air outlet 61 from affecting the ink spraying path, thereby affecting the position accuracy of the positioning mark 104 formed at the rear end of the diaphragm 10, and further affecting the accurate recognition of the positioning mark 104.

[0041] In this embodiment, the positioning mark 104 is formed on the adhesive layer 103 of the diaphragm 10. Generally, the diaphragm 10 is composed of a base film 101, a coating layer 102 covering the base film 101, and an adhesive layer 103 covering the coating layer 102. Therefore, in this application, when the conveying mechanism 1 conveys the diaphragm 10, the adhesive layer 103 of the diaphragm 10 faces upward. When the conveying mechanism 1 conveys the tail end of the diaphragm 10 to the spraying area 11, since the ink nozzle 4 is located above the spraying area 11, after the ink is sprayed out by the ink nozzle 4, the ink is sprayed on the adhesive layer 103 at the tail end of the diaphragm 10, so that the positioning mark 104 is formed on the adhesive layer 103 at the tail end of the diaphragm 10.

[0042] The reason for this arrangement is that the adhesive layer 103 of the diaphragm 10 has a certain adhesive ability. Spraying ink on the adhesive layer 103 can make the positioning mark 104 formed on the diaphragm 10 more solid, thereby preventing the positioning mark 104 from falling off in subsequent processes and affecting the identification of the tail end of the diaphragm 10, thereby further improving production efficiency.

[0043] In this embodiment, the fixed-point marking device further includes a diaphragm detection component 9 disposed on the conveying mechanism 1, and the diaphragm detection component 9 is used to detect whether the diaphragm 10 reaches the spraying area 11. In this application, the fixed-point marking device further includes a diaphragm detection component 9, and the diaphragm detection component 9 is disposed on the conveying mechanism 1.

[0044] The diaphragm detection component 9 can detect whether the tail end of the diaphragm 10 reaches the spraying area 11. When the diaphragm detection component 9 detects that the tail end of the diaphragm 10 does not reach the spraying area 11, the diaphragm detection component 9 transmits an electrical signal to the control system, so that the control system controls the conveying mechanism 1 to start running, conveys the diaphragm 10, and controls the spraying mechanism to stop working.

[0045] When the diaphragm detection component 9 detects that the tail end of the diaphragm 10 reaches the spraying area 11, the diaphragm detection component 9 transmits an electrical signal to the control system, thereby controlling the conveying mechanism 1 to stop running through the control system, so that the conveying mechanism 1 stops conveying the diaphragm 10, and at the same time controls the spraying mechanism to start, thereby forming a positioning mark 104 at the tail end of the diaphragm 10.

[0046] Specifically, in this embodiment, the diaphragm detection assembly 9 includes a proximity switch 91 located on one side of the spraying area 11, and a switch seat 92 for fixing the proximity switch 91 on the conveying mechanism 1. In the present application, the diaphragm detection assembly 9 includes a proximity switch 91 and a switch seat 92, which is fixedly connected to the conveying mechanism 1 through the switch seat 92, and the proximity switch 91 is fixedly installed on the conveying mechanism 1, and the proximity switch 91 is located on one side of the spraying area 11.

[0047] When the proximity switch 91 does not detect that the tail end of the diaphragm 10 reaches the spraying area 11, the proximity switch 91 transmits an electrical signal to the control system, so that the control system controls the conveying mechanism 1 to start running, and conveys the diaphragm 10, and controls the spraying mechanism to stop working; when the proximity switch 91 detects that the tail end of the diaphragm 10 reaches the spraying area 11, the proximity switch 91 transmits an electrical signal to the control system, thereby controlling the conveying mechanism 1 to stop running through the control system, so that the conveying mechanism 1 stops conveying the diaphragm 10, and controls the spraying mechanism to start, thereby forming a positioning mark 104 at the tail end of the diaphragm 10.

[0048] In this embodiment, the conveying mechanism 1 includes a conveying platform 12 and a conveyor belt 13 disposed on the conveying platform 12. The conveyor belt 13 conveys the diaphragm 10 forward. The conveying platform 12 is provided with a limiting groove 121 for limiting the diaphragm 10. The conveyor belt 13 is disposed at the bottom of the limiting groove 121. In the present application, the conveying mechanism 1 includes a conveying platform 12 and a conveyor belt 13. The limiting groove 121 is disposed on the conveying platform 12. The conveyor belt 13 is disposed at the bottom of the limiting groove 121. The diaphragm 10 is located on the conveyor belt 13, and the diaphragm 10 is driven forward by the conveyor belt 13. In this process, the two side walls of the limiting groove 121 limit the two sides of the diaphragm 10 respectively, thereby preventing the diaphragm 10 from being lateralized during transportation, thereby ensuring the position accuracy of the positioning mark 104 formed at the tail end of the diaphragm 10.

[0049] It is foreseeable that: in the present application, the limiting groove 121 provided on the conveying platform 12 limits the diaphragm 10, and only plays a guiding role for the diaphragm in the process of conveying the diaphragm 10 to the spraying area 11. When the diaphragm 10 is conveyed, its main deviation correction is still achieved by the deviation correction roller. In addition, considering that the texture of the diaphragm 10 is relatively soft, flexible pads can be provided on the two side walls of the limiting groove 121, so that the diaphragm 10 is in flexible contact with the two side walls of the limiting groove 121, thereby protecting the diaphragm 10.

[0050] In this embodiment, the spraying mechanism further includes a support frame 5, and the ink nozzle 4 is mounted on the support frame 5, so that the ink nozzle 4 is mounted above the conveying platform 12 through the support frame 5. The spraying area 11 is formed in the area where the conveying platform 12 is located directly below the ink nozzle 4, so when the conveying mechanism 1 transports the tail end of the diaphragm 10 to the spraying area 11, the conveyor belt 13 stops running, and the ink is sprayed out through the ink nozzle 4, so that the ink forms a positioning mark 104 at the tail end of the diaphragm 10, so that in the winding process of the diaphragm 10, the positioning mark 104 at the tail end of the diaphragm 10 is accurately identified by the identification device on the winding machine, and the staff is reminded to replace the diaphragm 10 by means of an alarm, thereby improving production efficiency.

[0051] Since the nozzle diameter of the ink nozzle 4 is limited, when the ink is sprayed out through the nozzle of the ink nozzle 4, the ink is only distributed in a partial area in the width direction of the rear end of the diaphragm 10, that is, the formed positioning mark 104 is only distributed in a partial area in the width direction of the rear end of the diaphragm 10, which may cause the identification device on the winding machine to be unable to accurately identify the positioning mark 104 at the rear end of the diaphragm 10.

[0052] Therefore, in this embodiment, a slide groove 51 is provided on the support frame 5, and the slide groove 51 is vertically arranged with respect to the conveying platform 12. When the ink nozzle 4 is mounted on the support frame 5, it can move along the slide groove 51 on the support frame 5. When the conveying mechanism 1 conveys the tail end of the diaphragm 10 to the spraying area 11, the ink nozzle 4 can be moved along the slide groove 51 on the support frame 5, so that the ink nozzle 4 moves along the width direction of the tail end of the diaphragm 10, and the ink is sprayed at multiple positions, so that the sprayed ink is completely distributed in the width direction of the tail end of the diaphragm 10, that is, the formed positioning mark 104 is completely distributed in the width direction of the tail end of the diaphragm 10, and then it is convenient for the identification device on the winding machine to accurately identify the positioning mark 104 at the tail end of the diaphragm 10.

[0053] In addition, by moving the ink nozzle 4 along the width direction of the rear end of the diaphragm 10 to spray ink at multiple positions, and by controlling the amount of ink sprayed, not only can the positioning mark 104 formed on the diaphragm 10 be made more regular and uniform, but the thickness of the positioning mark 104 can also be controlled to prevent it from affecting the assembly of the diaphragm 10 and the battery cell, thereby making the device more practical.

[0054] Specifically, a slider 41 is provided at the top of the ink nozzle 4. Through the cooperation of the slider 41 and the slide groove 51, the support frame 5 supports the ink nozzle 4 and sets the ink nozzle 4 above the conveying platform 12, and the ink nozzle 4 can move on the support frame 5 along the width direction of the tail end of the diaphragm 10.

[0055] Furthermore, a strip hole 52 for connecting the slide groove 51 with the outside can be provided on the support frame 5, and the strip hole 52 is provided in parallel with the slide groove 51, and a threaded hole 411 is provided on the slider 41. When the ink jet head 4 is jetting ink, the bolt 42 can penetrate the strip hole 52 from one end of the outer side of the support frame 5, and then be screwed with the threaded hole 411 on the slider 41 until the nut of the bolt 42 abuts against the outer wall of the support frame 5, thereby fixing the slider 41 in the slide groove 51, and then fixing the ink jet head 4 on the support frame 5, so as to prevent the ink jet head 4 from shaking on the support frame 5 when jetting ink, thereby affecting the stability of ink jetting.

[0056] When it is necessary to move the ink nozzle 4 on the support frame 5 and change the ink spraying position of the ink nozzle 4 in the width direction of the rear end of the diaphragm 10, the bolt 42 can be loosened in the threaded hole 411 of the slider 41 to make the nut of the bolt 42 away from the outer wall of the support frame 5, so that the bolt 42 no longer fixes the slider 41 in the slide groove 51, and the slider 41 can move in the slide groove 51, so that the ink nozzle 4 can move on the support frame 5 along the width direction of the rear end of the diaphragm 10, thereby adjusting the ink spraying position of the ink nozzle 4 in the width direction of the rear end of the diaphragm 10.

[0057] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present utility model.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A fixed-point marking device for a lithium battery separator, characterized in that: The invention comprises a conveying mechanism (1) for conveying a diaphragm (10), and a spraying mechanism arranged above the conveying mechanism (1), wherein the area directly below the conveying mechanism (1) forms a spraying area (11); the conveying mechanism (1) conveys the diaphragm (10) to the spraying area (11), and the spraying mechanism is used to form a positioning mark (104) on the diaphragm (10) in the spraying area (11).

2. A fixed-point marking device for a lithium battery separator as claimed in claim 1, characterized in that: The spraying mechanism comprises an ink storage tank (2) for storing ink, an ink driving component (3) for conveying ink, and an ink nozzle (4) for spraying ink, wherein the ink driving component (3) conveys the ink in the ink storage tank (2) to the ink nozzle (4), the spraying area (11) is formed in an area of ​​the conveying mechanism (1) directly below the ink nozzle (4), and the ink sprayed from the ink nozzle (4) forms the positioning mark (104) on the diaphragm (10) of the spraying area (11).

3. A fixed-point marking device for a lithium battery separator as claimed in claim 1, characterized in that: The fixed-point marking device further comprises a drying mechanism disposed on one side of the spraying area (11), wherein the drying mechanism is used to rapidly solidify the ink on the diaphragm (10).

4. A fixed-point marking device for a lithium battery separator as claimed in claim 3, characterized in that: The drying mechanism comprises a hot air box (6) arranged on one side of the spraying area (11), a hot air blower (7) for providing hot air to the hot air box (6), and a hot air duct (8) connecting the hot air blower (7) and the hot air box (6), wherein an air outlet (61) is provided on the hot air box (6), and the air outlet (61) is directly opposite to the spraying area (11).

5. A fixed-point marking device for a lithium battery separator as claimed in claim 1, characterized in that: The positioning mark (104) is formed on the adhesive coating layer (103) of the diaphragm (10).

6. A fixed-point marking device for a lithium battery separator as claimed in claim 1, characterized in that: The fixed-point marking device further comprises a diaphragm detection component (9) arranged on the conveying mechanism (1), wherein the diaphragm detection component (9) is used to detect whether the diaphragm (10) has reached the spraying area (11).

7. A fixed-point marking device for a lithium battery separator as claimed in claim 6, characterized in that: The diaphragm detection assembly (9) comprises a proximity switch (91) located on one side of the spraying area (11), and a switch seat (92) for fixing the proximity switch (91) on the conveying mechanism (1).

8. A fixed-point marking device for a lithium battery separator as claimed in claim 1, characterized in that: The conveying mechanism (1) comprises a conveying platform (12) and a conveying belt (13) arranged on the conveying platform (12), wherein the conveying belt (13) conveys the diaphragm (10) forward, and the conveying platform (12) is provided with a limiting groove (121) for limiting the position of the diaphragm (10), and the conveying belt (13) is arranged at the bottom of the limiting groove (121).

9. A fixed-point marking device for a lithium battery separator as claimed in claim 2, characterized in that: The spraying mechanism further comprises a support frame (5), the ink nozzle (4) being mounted on the support frame (5), and the support frame (5) being used to mount the ink nozzle (4) above the conveying mechanism (1).

10. A fixed-point marking device for a lithium battery separator as claimed in claim 9, characterized in that: The support frame (5) is provided with a slide groove (51), the slide groove (51) is arranged vertically with the conveying mechanism (1), and the ink nozzle (4) can move along the slide groove (51) on the support frame (5).

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