Portable adhesive force measuring instrument

Abstract

The present invention relates to a device for inspecting the adhesive force of a secondary battery cell and, more specifically, to a portable adhesive force measuring instrument and system for quantitatively inspecting the adhesive force of cells in a production line. According to one embodiment of the present invention, the portable adhesive force measuring instrument and system can be provided, the measuring instrument comprising: a case having a lid, and having a storage space formed therein; a base plate which is provided inside the case, and which is exposed to the outside while the lid is open; a sample loading table which is provided on one side of the base plate, and which protrudes a predetermined height from the base plate such that a sample of which the adhesive force is to be measured is fixed thereon; a linearly-moving table provided on a straight line with the sample loading part on the table; an adhesive force gauge which has a clamp connected to a separator of the sample, and which is mounted on the linearly-moving table so as to acquire adhesive force data while linearly moving; and an interface screen for controlling the movement of the linearly-moving table.

Description

Portable Adhesion Meter

[0001] The present invention relates to a device for examining the adhesive strength of a secondary battery cell, and more specifically, to a portable adhesive strength measuring device and system for quantitatively examining the adhesive strength of a cell in a production line.

[0002] This application claims the benefit of priority to Republic of Korea Patent Application No. 10-2024-0004020, filed January 10, 2024, the entire contents of which are incorporated herein by reference.

[0003] Rechargeable secondary batteries have recently been widely used in a variety of devices. They are particularly attracting attention as an eco-friendly energy source that can reduce air pollution, particularly in vehicles powered by fossil fuels.

[0004] Secondary batteries can be classified into lithium-ion batteries, lithium-ion polymer batteries, etc. depending on the composition of the electrodes and electrolyte, and can be classified into square batteries, pouch-type batteries, and cylindrical batteries depending on the shape of the battery case.

[0005] The electrode assembly built into the battery case is a power generation element capable of charging and discharging, consisting of a positive electrode, a negative electrode, and a separator interposed between the positive and negative electrodes. The electrode assembly can be classified into a jelly roll type in which a separator is interposed between long sheet-shaped positive and negative electrodes coated with active materials, and a stack type in which multiple positive and negative electrodes are sequentially stacked in a state described in the separator.

[0006] In the case of stacked secondary batteries, individual positive electrodes, negative electrodes, and separators can be manufactured by stacking them one by one, or they can be manufactured by stacking semi-finished cells.

[0007] Semi-finished products can be formed by stacking a separator, anode, separator, and cathode, and these can be called monocells. Semi-finished products can be formed by stacking a separator, anode, and separator, and these can be called half-cells. Monocells can be formed by stacking, and half-cells can be formed by stacking a separator, cathode, and separator. Of course, the stacking order and number of layers in semi-finished products can vary.

[0008] After multiple semi-finished products, such as monocells, are laminated, a final semi-finished product, a half-cell, is laminated to finally manufacture a finished product, such as an electrode assembly.

[0009] In the manufacture of these semi-finished products, the adhesion between the separator and the cathode, the separator and the anode, and between the separators is one of the important quality factors.

[0010] However, because it's difficult to assess the degree and level of adhesion on the production line, visual inspections are primarily used. Therefore, quantitative measurements are impossible. Of course, measuring adhesion requires moving the product to a laboratory equipped with a universal testing machine (UTM), rather than the production line, and measuring the adhesion on the semi-finished product. Therefore, the transport and measurement process inevitably entails excessive time and costs.

[0011] Furthermore, UTM equipment is not originally designed to measure adhesive strength, but rather to measure the tensile strength of materials. Therefore, UTM equipment is not suitable for adhesive strength measurement, resulting in poor measurement reproducibility.

[0012] Through one embodiment of the present invention, it is intended to provide a portable adhesive strength measuring device and system capable of quantitatively measuring the adhesive strength of a semi-finished product in a production line.

[0013] Through one embodiment of the present invention, it is intended to provide a portable adhesive strength measuring device and system formed in a box shape for easy storage and portability.

[0014] Through one embodiment of the present invention, it is intended to provide a portable adhesive strength measuring device and system that can easily measure and analyze adhesive strength at a production line site.

[0015] Through one embodiment of the present invention, it is intended to provide a portable adhesive strength measuring device and system capable of providing an optimized user interface.

[0016] Through one embodiment of the present invention, it is intended to provide a portable adhesive force measuring device and system that can easily produce control logic by using a general adhesive force gauge and controlling linear movement of the adhesive force gauge.

[0017] In order to achieve the above-mentioned purpose, according to one embodiment of the present invention, a portable adhesive strength measuring device for measuring the adhesive strength of an electrode and a separator of a secondary battery can be provided.

[0018] The portable adhesive force measuring device may include: a case having a cover and a storage space formed therein; a base plate provided inside the case and exposed to the outside when the cover is open; a sample mounting table provided on one side of the base plate and protruding from the base plate at a predetermined height so as to fix a sample for adhesive force measurement; a linear movement table provided on the table in a straight line with the sample mounting portion; an adhesive force gauge having a clamp connected to a separation membrane of the sample, and mounted on the linear movement table to acquire adhesive force data while moving linearly; and an interface screen for controlling the movement of the linear movement table.

[0019] Therefore, when an operator opens the cover to use the portable adhesive strength meter, all of the components that the operator must manipulate and visually inspect may be exposed to the outside from above the base plate.

[0020] It is preferable that the linear moving table is provided with a gauge mounting plate that is movable and on which the adhesive gauge is mounted. It is preferable that the adhesive gauge mounted on the gauge mounting plate is moved integrally with the gauge mounting plate.

[0021] It is preferable that the above linear moving table and the above sample mounting table have a protrusion height determined relative to the base plate so that the clamp of the mounted adhesive gauge and the sample are horizontal. Through this, the separator can be linearly pulled and peeled off substantially horizontally.

[0022] It is preferable that the adhesive force gauge is linearly moved by linear movement of the gauge mounting plate on the linear movement table.

[0023] It is preferable that the above adhesive strength gauge be provided to output the adhesive strength measured at preset time intervals.

[0024] It is preferable that the data output from the above adhesive force gauge be transmitted to an external terminal via a connection line.

[0025] The interface screen may display a menu for moving the origin of the adhesive force gauge; a start position menu indicating that the adhesive force gauge is at a start position; and an end position menu indicating that the adhesive force measuring device is at an end position to move and end measurement.

[0026] When the above origin movement menu is entered, it is preferable that the adhesive gauge is moved to the origin position.

[0027] It is preferable that the above adhesive force gauge is moved to the origin position and then sequentially moved to the preparation position and the start position.

[0028] When the end position menu is entered after the adhesive gauge has been moved to the start position, it is preferable that the adhesive gauge moves linearly at a constant speed to the end position.

[0029] Therefore, the operator can easily check the operation of the servo motor and perform operation commands by checking whether the menus are activated and entering the menus.

[0030] To achieve the aforementioned objectives, according to one embodiment of the present invention, a portable adhesive strength measurement system may be provided. The portable adhesive strength measurement system may include the aforementioned portable adhesive strength measuring device and an external terminal.

[0031] A portable adhesive strength measurement system may include a case having a cover and a storage space formed therein; a base plate provided inside the case and exposed to the outside when the cover is open; a sample mounting table provided on one side of the base plate and protruding from the base plate at a predetermined height so as to secure a sample for adhesive strength measurement; a linear movement table provided on the table in a straight line with the sample mounting portion; an adhesive strength gauge having a clamp connected to a separator of the sample and mounted on the linear movement table to acquire adhesive strength data while moving linearly; an interface screen controlling the movement of the linear movement table; and an external terminal provided in communication with the adhesive strength gauge to collect and analyze adhesive strength data output from the adhesive strength gauge.

[0032] The external terminal may be integrally fixed to the case. That is, it may be a component mounted on the case or base plate, similar to the interface screen. Specifically, the external terminal may be mounted on the underside of the cover. Therefore, when the cover is open and raised 90 degrees, the external terminal is exposed to the outside and can also be raised 90 degrees.

[0033] However, the external terminal is preferably a general-purpose PC, and more preferably a tablet PC. In this case, the cover needs to be provided with a horizontal protrusion to allow the external terminal to be erected and secured.

[0034] It is preferable that the above adhesive force gauge and the external terminal be connected via a connecting line. For adhesive force measurement, the external terminal and the adhesive force gauge are connected via a connecting line. Otherwise, the external terminal and the adhesive force gauge may be separated.

[0035] It is preferable that the linear moving table include a gauge mounting table on which the adhesive force gauge is mounted and which is linearly movable.

[0036] It is preferable that one end of the linear movement table include a servo motor driven for forward and backward linear movement of the gauge settling table.

[0037] It is preferable that the PLC control unit for controlling and powering the servo motor and the interface screen is located at the bottom of the base plate. It is preferable that the PLC control unit is equipped to receive external power.

[0038] It is preferable that the above-mentioned adhesive force gauge be powered from the external terminal via the connection line. Therefore, like the external terminal, the adhesive force gauge can also be employed as a general adhesive force gauge.

[0039] It is preferable that the above servo motor is driven to linearly move the gauge mounting table at a preset constant speed, and the adhesive force gauge is provided to output the adhesive force strength measured at preset time intervals.

[0040] The external terminal is a tablet PC, and it is preferable that the cover be provided with a fixing protrusion that can support the external terminal when the cover is fully open.

[0041] After executing the adhesive force collection software installed on the external terminal and starting data collection, it is desirable to record the data on the external terminal.

[0042] After the data collection end input of the adhesive force collection software installed on the external terminal is completed, it is preferable to end the data recording on the external terminal.

[0043] It is preferable that a graph of the adhesive strength for the location of the separator be generated and displayed based on the collected data by executing the adhesive strength analysis software installed on the external terminal.

[0044] Therefore, adhesion data collection and analysis can be easily performed at the production site, and the results of these analyses can be immediately reflected in the production site.

[0045] Through one embodiment of the present invention, a portable adhesive strength measuring device and system capable of quantitatively measuring the adhesive strength of a semi-finished product in a production line can be provided.

[0046] Through one embodiment of the present invention, a portable adhesive strength measuring device and system formed in a box shape and easy to store and carry can be provided.

[0047] Through one embodiment of the present invention, a portable adhesive strength measuring device and system can be provided that can easily measure and analyze adhesive strength at a production line site.

[0048] Through one embodiment of the present invention, a portable adhesive strength measuring device and system capable of providing an optimized user interface can be provided.

[0049] Through one embodiment of the present invention, a portable adhesive force measuring device and system can be provided that can easily produce control logic by using a general adhesive force gauge and controlling linear movement of the adhesive force gauge.

[0050] FIG. 1 illustrates a portable adhesive strength measuring device according to one embodiment of the present invention.

[0051] Figure 2 shows the appearance at the starting position of the adhesive force gauge,

[0052] Figure 3 shows the appearance at the end position of the adhesive force gauge,

[0053] Figure 4 illustrates the configuration of the sample settling table and the sample settling and fixing structure.

[0054] Figure 5 illustrates an example of the sample production sequence.

[0055] FIG. 6 illustrates a control flow of a portable adhesive strength measuring device according to an embodiment of the present invention.

[0056] Figure 7 shows an example of a table and graph of measured adhesive strength,

[0057] FIG. 8 illustrates an example of an interface screen of a portable adhesive strength measuring device according to an embodiment of the present invention.

[0058] Hereinafter, a portable adhesive strength measuring device according to an embodiment of the present invention will be described in detail with reference to the attached drawings.

[0059] Figure 1 illustrates an example of a portable adhesion tester.

[0060] A portable adhesive strength meter (100) includes a case (10). The case (10) includes a main body (11) and a cover (12), and the portable adhesive strength meter (100) can be used by opening the cover (12) while the main body (11) is kept horizontal to the ground.

[0061] When the cover (12) is closed, the case (10) performs the function of storing the internal components. That is, a storage space is formed inside the case.

[0062] A base plate (20) may be provided inside the case. The base plate (20) is configured to mount components for measuring adhesive strength, and may be exposed to the outside when the cover is open. That is, the components provided on the base plate (20) may be exposed to the outside.

[0063] In addition, the base plate (20) can perform the function of dividing the space inside the main body (11) into upper and lower parts. That is, the upper part of the base plate (20) is provided with components for direct operation by the operator, and the lower part of the base plate (20) can be provided with a control unit such as a PLC (programmable logic controller), a power supply unit, and other control components.

[0064] The above case (10) can be mounted on a mobile device such as a carrier or cart, through which a worker can easily move the portable adhesive force measuring device (100).

[0065] A sample mounting table (60) may be provided on one side of the upper surface of the base plate (20). A sample for measuring adhesive strength may be mounted and fixed on the sample mounting table (60). Details regarding the sample will be described later.

[0066] A linear movement table (40) may be provided on the other side of the upper surface of the base plate (20). It is preferable that the linear movement table (40) be positioned in a straight line with the sample placement table (60).

[0067] It is preferable that the above sample settling table (60) and linear movement table (40) be positioned in front of the base plate (20).

[0068] An interface screen (70) is preferably provided on the rear of the upper surface of the sample mounting table (60). The interface screen may be configured for an operator to operate for adhesive force measurement. The operator can control the operation of the linear movement table using the interface screen. In addition, the interface screen may be configured to display the current status to the operator during the adhesive force measurement process.

[0069] The linear movement table (40) may be equipped with an adhesion gauge (50). The adhesion gauge (50) has a clamp connected to the separator of the sample, and the adhesion gauge (50) can measure the adhesion between the separator and the electrode by linearly moving. As described below, since the position where the separator begins to peel and the position of the clamp are located opposite to each other with respect to the sample, an extension film may be interposed between the separator and the clamp.

[0070] Specifically, the linear movement table (40) is provided with a gauge mounting plate (30), and the gauge mounting plate (30) can be provided to move linearly with respect to the linear movement table (40). The gauge mounting plate (30) can be linearly moved with respect to the linear movement table (40) by the operation of a linear servo motor.

[0071] The adhesive force gauge (50) can be mounted on the upper surface of the gauge mounting plate (30). Therefore, the gauge mounting plate (30) and the adhesive force gauge (50) can be linearly moved as one unit.

[0072] The above adhesive force gauge (50) may include a connecting line (51). The adhesive force gauge (50) may collect adhesive force data and transmit the collected data to an external terminal (80) through the connecting line (51).

[0073] It is preferable that the external terminal (80) be equipped with data collection software and data analysis software. While the data collection software is running, the external terminal (80) can receive and record adhesive data from the adhesive force gauge (50). That is, as the adhesive force gauge (50) moves linearly, the resistance when the separator is peeled can be measured, and this resistance can be measured as adhesive force.

[0074] Here, the adhesion data can be measured as adhesion against displacement. Displacement refers to the location where the separator is peeled off from the sample, and the adhesion at that location can be measured. Displacement can be calculated arithmetically. That is, the positional displacement of the adhesion gauge can be calculated as the displacement of the location where the separator is peeled off. Therefore, it is desirable that the adhesion gauge be controlled to move linearly at a constant velocity.

[0075] After data collection is completed through an external terminal (80), data analysis software can be run on the external terminal (80) to analyze the collected adhesive strength data.

[0076] The above external terminal (80) may be an external PC, but it is preferably a tablet PC for easy portability.

[0077] A certain internal space is also provided within the cover (12), and for this purpose, the cover (12) may be provided to have a certain height. Here, the cover (12) may be provided to open by rotating by 90 degrees to less than 100 degrees. When the cover (12) is fully opened, a horizontal protrusion (13) may be formed on the cover (12). Accordingly, the external terminal (80) may be temporarily erected and fixed using the horizontal protrusion (13).

[0078] The worker can store and carry the portable adhesive force meter and the external terminal (80) separately, and can easily measure and analyze the adhesive force by connecting the external terminal (80) and the adhesive force gauge (50) with a wire when measuring the adhesive force.

[0079] Of course, a portable adhesive strength measuring device according to one embodiment of the present invention may include not only an interface screen (70) but also a terminal. However, since it is more economical for the terminal to perform other functions in addition to simply collecting and analyzing adhesive strength data, it is preferable that the adhesive strength gauge (50) and the connection line (51) constitute the adhesive strength measuring device, and that the external terminal (80) be provided for general use as well as for adhesive strength measurement.

[0080] Therefore, in this embodiment, the external terminal and adhesive force gauge are not limited to the configurations used in this embodiment, and a general-purpose tablet PC and tensile force measuring gauge can be used. This allows for the production and use of a portable adhesive force measuring device and system that is very easy and economical.

[0081] The adhesive force gauge (50) is equipped with a display (50a), and the operating status of the adhesive force gauge can be displayed on the display (50a). In addition, the zero point can be set through the display (50a) or a separate button.

[0082] Hereinafter, the position of the adhesive force gauge before and after adhesive force measurement will be described in detail with reference to FIGS. 2 and 3. FIG. 2 illustrates the appearance before adhesive force measurement, and FIG. 3 illustrates the appearance after adhesive force measurement is completed.

[0083] First, a sample is prepared for adhesive strength measurement, and the prepared sample can be mounted on a sample mounting table (60). The sample mounting table (60) can include a lower plate (61), a support frame (2), and an upper table (63). The lower plate (61) is mounted on a base plate (20), and an upper plate (63) can be provided at a predetermined distance above the lower plate (61). A support frame (62) can be provided between the lower plate (61) and the upper plate (63). The support frame (62) can be provided to support both sides of the upper plate (63).

[0084] A sample (90) is fixed to the upper plate (63), and one end of a separation membrane (92) positioned on the upper surface of the sample can be coupled to a clamp (52). Specifically, it is preferable that one end of the separation membrane be coupled to the clamp through an extension membrane.

[0085] Since the sample mounting table (60) is positioned so as to protrude above the base plate (20), the operator can easily mount the sample on the sample mounting table (60). In addition, since the clamp (52) and the adhesive force gauge (50) are positioned so as to protrude above the base plate (20) through the linear movement table (30), the operator can easily combine the sample's separator with the clamp.

[0086] Here, the separator (4) is adhered to the upper surface of the electrode, and by pulling the separator (4), the separator (4) can be separated from the electrode. In other words, the separator can be peeled off from the electrode, and the resistance generated at this time can be said to be the adhesive force between the electrode and the separator.

[0087] Meanwhile, in the sample (90), the separator (4) may not protrude or may have a very short protrusion length. Therefore, in order to couple the separator (4) with the clamp (52), the separator must protrude by a predetermined length or more. That is, the separator must protrude relative to the electrode. This is because a portion of the separator is inserted into the clamp (52), and the electrode must not be coupled with the clamp (52).

[0088] In addition, as illustrated in FIGS. 2 and 3, in order to separate the separator (4), the left end of the separator must be held and pulled to the right. In this case, the clamp (52) and the separator (4) are not positioned on the same plane. Therefore, it is preferable that the sample (90) be provided with an extension film (9) that is connected to the left end of the separator and coupled to the clamp (52).

[0089] That is, it is preferable that the extension film (9) be interposed between one end of the separator (4) (the end of the part that is initially peeled off) and the clamp (52). The extension film (9) may be provided so as to be connected to one end of the separator (4) and extend past the other end of the separator (4) (the end of the part that is finally peeled off) to the clamp (52).

[0090] The above clamp (52) is provided on the adhesive force gauge (50), and as the adhesive force gauge (50) moves linearly at a constant speed, the clamp (52) pulls the separator (4) through the extension film (9). The resistance generated as the separator is peeled off from the electrode is measured by the adhesive force gauge (50) through the clamp (52), and this resistance can be referred to as adhesive force. Here, since the adhesive force gauge (50) moves linearly at a constant speed, the peeling position can be calculated linearly over time, and the adhesive force at that position can be measured.

[0091] As illustrated in Fig. 3, the adhesion gauge (50) moves linearly away from the sample mounting table (60), thereby causing the separator (4) to peel off. When the adhesion gauge (50) completes moving a preset distance, the adhesion measurement can be terminated.

[0092] Below, the structure in which the sample (90) is mounted on the sample mounting table (60) will be described in more detail with reference to FIG. 4.

[0093] The sample (90) may include a slide glass (96) and a sample (1a) of a semi-finished product (1) attached on the slide glass (96). The semi-finished product sample (1a) may include a separator (4).

[0094] The upper plate (63) of the sample settling table (60) is provided with a groove (64) in which a slide glass (96) is mounted, and the groove (64) can be formed so that at least a portion of the slide glass (96) can be inserted from the top to the bottom.

[0095] A guide block (65) is provided on one side of the groove (64) to guide the insertion and mounting of the slide glass (96), and a fastening hole (66) may be formed on the other side of the groove (64). The slide glass (96) inserted into the groove (64) may be fixed on one side by the guide block (65) and on the other side by a fastening member (67) fastened to the fastening hole (66). A plurality of fastening holes (66) and fastening members (67) may be provided. The fastening member (67) is provided in the form of a stud bolt, and as the fastening member (67) is fastened to the fastening hole (66), the head of the fastening member (67) presses and fixes the slide glass (96). Therefore, during the adhesive force measurement process, the sample (90) is firmly fixed to the sample mounting table (60), and only the separator (4) can be peeled off from the sample (1).

[0096] The semi-finished sample (1a) attached to the above slide glass (96) can be firmly fixed horizontally to the adhesive force gauge (50) through the sample mounting table (60).

[0097] Below, the process of manufacturing a sample is described in detail with reference to Fig. 5.

[0098] Fig. 5(a) illustrates a cross-section of a monocell as an example of a semi-finished product (1), and specifically, illustrates a cross-section cut in a direction perpendicular to the length direction of the semi-finished product (1).

[0099] First, the separator and electrode for measuring the adhesive strength in the finished product or semi-finished product (1) can be determined. Here, the electrode refers to the anode and cathode. Since the separator is always interposed between the anode and the cathode, the adhesive strength between the anode and the separator and the adhesive strength between the cathode and the separator in the semi-finished product can be said to be very important quality factors. For example, in the semi-finished product (1) in which the separator (4), the cathode (2), the separator (4), and the anode (3) are sequentially laminated from below, the adhesive strength between the separator (4) located at the bottom and the cathode (2) can be determined by measuring the adhesive strength. Here, the separators (4) and the separators (4) can be vertically adhered at both ends of the semi-finished product (1).

[0100] As illustrated in Fig. 5(b), the semi-finished product (1) can be turned over so that the separator (4) is positioned at the top and the cathode (2) is positioned below it. That is, it can be determined to measure the adhesive strength (8) between the uppermost separator (4) and the cathode (2) below it based on Fig. 5(b). In other words, the semi-finished product (1) can be prepared so that the separator to be peeled off is positioned at the top.

[0101] The separator (4) is generally larger than the positive electrode (3) and the negative electrode (2) and protrudes from the positive electrode (3) and the negative electrode (2). In addition, the ends of the protruding separator (4) can be bonded upward and downward to form a semi-finished product (1), particularly a monocell. For example, in a semi-finished product (1) having a square shape, the separator (4) can be provided to further protrude from the positive electrode (3) and the negative electrode (2) at four sides. That is, it can have a free length at four sides while covering both the positive electrode and the negative electrode. Here, both ends of the upper and lower separators (4) can be in close contact with each other at both sides where the electrode leads are not provided.

[0102] Thereafter, the semi-finished product (1) can be cut to a preset size to produce a sample (1a). The horizontal and vertical lengths of the rectangular sample (1a) can be preset. Through the preset horizontal and vertical lengths of the sample (1a), the size of the sample mounting structure and the linear displacement of the adhesive force gauge for measuring the adhesive force can be preset.

[0103] For example, a sample (1a) can be manufactured by cutting a semi-finished product (1) to have a horizontal length of 55 mm and a vertical length of 20 mm. At this time, it is preferable that one end of the semi-finished product (1) from which the separator (4) protrudes remain in the sample (1a). That is, the semi-finished product (1) is cut horizontally up and down so that the length between the upper and lower sides is 20 mm, and then the left side is cut to manufacture a sample (1a) having three cut sides and a width of 55 mm and a height of 20 mm. Accordingly, the right side of the sample (91) can be said to be a state in which the upper and lower separators (4) are in close contact with each other, and the left side can be said to be a state in which it is cut so as to have a vertical plane. That is, in the rectangular sample (1a), the electrode and the separator form the same vertical plane at the upper side, the lower side, and the left side, but the separator can protrude from the electrode at the right side.

[0104] A sample (1a) manufactured through cutting can be attached to a slide glass (90). Here, the slide glass can be manufactured to be approximately 20 mm larger than the horizontal length of the sample and approximately 4 mm larger than the vertical length of the sample.

[0105] The above sample (1a) can be attached to a slide glass (96) using a double-sided adhesive tape. First, one side of the double-sided adhesive tape (5) can be attached to the slide glass (96), and then the adhesive tape can be cut to fit the size of the sample (91). The adhesive tape is positioned at the center of the slide glass (90). Thereafter, the protective film of the adhesive tape can be removed to expose the other side of the double-sided adhesive tape, and the sample (1a) can be attached to the other side of the adhesive tape.

[0106] As shown in Fig. 5(c), the sample (1a) is attached to the slide glass (96) with a clearance distance (A) on both sides, which may be approximately 10 mm. In addition, the upper and lower clearance distances may be approximately 2 mm. Accordingly, the slide glass may be manufactured in advance so that the horizontal length is approximately 75 mm and the vertical length is approximately 24 mm.

[0107] Based on Fig. 5(d), the separator (4) in the sample (1a) is pulled to the right to measure the adhesive strength with the negative electrode (2). Therefore, an adhesive strength measuring device is provided on the right side of the sample (1a). For this reason, a connecting film (9) may be provided to connect the separator (4) and the adhesive strength measuring device. Here, it is preferable that the connecting film (9) be manufactured in advance to have a length of approximately 75 mm or more so that it can be connected to a clamp across the sample (1a).

[0108] The connecting membrane (9) may include an adhesive tape (9a) and a PET film (9b). The adhesive tape (9a) connects the separator (4) and the PET film (9b), and the PET film may be extended to the right and then connected to the clamp of the adhesion measuring device.

[0109] The connecting film (9) can be formed using a double-sided adhesive tape. One end of the double-sided adhesive tape can be attached to the lower surface of the end of the separator (4) and the other end can be attached to the upper surface of the end of the separator (4), and then the double-sided adhesive tape can be folded. At this time, the protective film of the double-sided adhesive tape forms the upper and lower surfaces of the connecting film (9). Thereafter, the ends of the folded double-sided adhesive tape can be joined with a clamp. Therefore, when manufacturing the connecting film (9) using a double-sided adhesive tape, the double-sided adhesive tape can be cut to 150 mm or more in advance, folded in half, and used as a connecting film.

[0110] When the fabrication of the sample (90) is completed by attaching the sample (1a) to the slide glass (96) and connecting the connecting film (9) to the separator (4), the sample (90) is fixedly placed on the sample mounting table as shown in FIG. 2 and the end of the connecting film (9) is connected to a clamp, so that preparation for adhesive force measurement can be completed.

[0111] As illustrated in Fig. 5(c), the anode (3) can be attached to a slide glass, and the upper separator (4) and cathode (2) can be manually separated. Thereafter, by similarly connecting a connecting film (9) to the end of the remaining separator (4), it can be seen that the adhesive strength between the separator (4) and the anode (3) can be measured.

[0112] Hereinafter, with reference to FIG. 6, the control flow of an adhesive force measuring device according to an embodiment of the present invention will be described in detail.

[0113] First, the main power of the adhesive force measuring device (100) is supplied (S10). The main power may be provided in the form of a button or switch on the lower side of the case (10), particularly the main body (11). When the main power is supplied to the main body (11), power may be supplied to the interface screen (70) and turned on. Then, the adhesive force gauge (50) and the external terminal (80) may be connected via a connection line (51). Power may be supplied from the external terminal (80) to the adhesive force gauge (50) via the connection line (51), and the adhesive force gauge (50) may be turned on. Therefore, the power of the adhesive force gauge (50) may be supplied independently of the main power of the adhesive force measuring device (100).

[0114] Afterwards, a measurement program can be executed (S20) on an external terminal (80). The measurement program is software installed on the external terminal (80), and the operator can execute the measurement program on the external terminal (80).

[0115] Here, the wire can perform the function of transmitting data collected through the adhesive force gauge to an external terminal as well as the function of supplying power to the adhesive force gauge. In other words, the power of the external terminal can be used as the power source for the adhesive force gauge.

[0116] The operator can return the adhesive force gauge (50) to the origin (S30) through the interface screen (70). That is, the position initialization of the adhesive force gauge (50) can be performed. Although the adhesive force gauge may have returned to the origin in a previous measurement, it is preferable to perform the position initialization of the adhesive force gauge (50) (S30) for accurate measurement.

[0117] Afterwards, sample acquisition and mounting (S40) can be performed. Sample mounting can be completed by connecting the clamp of the adhesive force gauge (50) located at the origin to the connecting film. Here, sample acquisition and mounting (S40) can be performed manually by an operator.

[0118] Once sample acquisition and mounting (S40) is completed, the operator can command the execution of an adhesion measurement and data collection by manipulating the interface screen (70). According to the user's command, i.e., input, the adhesion gauge (50) moves linearly at a constant speed while pulling the connecting film. That is, the separator is peeled off from the electrode. At this time, the adhesion is measured through the adhesion gauge, and the measured data can be transmitted to an external terminal (S80) and collected (S50).

[0119] When the adhesive gauge (50) completes moving to the end position, data collection is completed, and then the worker can analyze the collected data (S60) by executing a data analysis program of an external terminal (70).

[0120] Figure 7(a) illustrates an example of a table representing collected data. The collected data can be input into an analysis program and displayed in a graph format, as shown in Figure 7(b). Through the displayed graph, workers can view various adhesive strength-related figures, such as changes in adhesive strength over time, average adhesive strength, and peak adhesive strength. By checking the form and measured values ​​of these graphs, workers can easily verify the appropriateness of the adhesive strength on-site.

[0121] Here, two peak values ​​can be formed in the graph. That is, a peak value can be formed at the moment when the separator (4) is completely peeled off from the cathode (2), and a peak value can be formed at the moment when the upper separator is completely peeled off from the lower separator. Therefore, according to the present embodiment, not only the bonding strength between the separator and the electrode, but also the bonding strength between the separators can be measured.

[0122] Below, with reference to FIG. 8, the operation of the adhesive force measuring device through the interface screen (70) is described in detail.

[0123] The interface screen (70) may be provided in the form of a touch screen, and the screen may be divided into multiple areas. For example, a setting area (71), a position and speed distinction area (72), a position and speed display area (73), a position and display change area (74), and a servo area (75) may be provided.

[0124] The setting area (71) may be equipped with an origin return menu (71a). When the operator selects the origin return menu (71a), the adhesive force gauge returns to the origin. This can be considered a menu for initializing the position of the adhesive force gauge before starting adhesive force measurement. The origin can be considered the origin position of the servo motor, i.e., the origin position of the adhesive force gauge. In addition, the setting area (71) may be equipped with various menus, such as environment settings or alarm settings.

[0125] The position and speed distinction area (72) can be said to be an area that distinguishes and displays the position and movement speed of the adhesive force gauge. Since the movement of the adhesive force gauge is performed by driving the servo motor, the servo position indicates the current position of the servo motor, the standby position is a position where the adhesive force gauge prepares for operation, and the start position is a position where the adhesive force gauge starts moving for adhesive force measurement. The end position can be said to be a position where the adhesive force gauge moves and finally reaches for adhesive force measurement.

[0126] Additionally, the position and speed distinction area (72) may display items such as the speed at which the servo motor moves to the ready position (standby speed), the speed at which the servo motor starts from the start position (start speed), and the speed at which the servo motor ends at the end position (end speed).

[0127] On one side of the position and speed distinction area (72), a position and speed display area (73) may be provided in which numerical values ​​corresponding to the corresponding position and speed items are displayed. Numerical values ​​for the corresponding position and numerical values ​​for the movement speed of the adhesive force gauge at the corresponding position may be displayed. These positions and speeds can be changed and set by the operator. The position is displayed in mm units, and the speed can be displayed in mm / s units. The driving and speed of the servo motor correspond to the movement and speed of the adhesive force gauge, and all can be set on the premise of linear movement.

[0128] For example, when a worker touches a menu where numbers are displayed, the position numbers and speed numbers can be changed through the position and speed change area (74) provided on one side of the position and speed display area (73).

[0129] A servo area (75) may be provided to display the current position status of the adhesive force gauge. In addition, the servo area (75) may be provided to enable an operator to command the adhesive force gauge to move to a corresponding position by driving a servo motor.

[0130] When the operator inputs the origin return menu (71a) in the setting area (71), the origin menu (origin, 75a) in the servo area (75) may be activated. That is, the adhesive force gauge may return to the origin while the activation is performed. Here, activation may mean that the menu blinks or is displayed relatively brightly. When the activation is completed, the blinking may stop or the display may become dark.

[0131] The adhesive force gauge moves to the standby position after returning to the origin, and at this time, the standby menu (standby position, 75a) can be activated in the servo area (75a). That is, the adhesive force gauge can move to the standby position while activation is being performed.

[0132] Afterwards, the adhesive gauge moves to the start position, and at this time, the start menu (start position, 75c) can be activated in the servo area (75). That is, the adhesive gauge can move to the start position while activation is performed.

[0133] Once the adhesive force gauge has been moved to the ready position through the interface screen (70), the adhesive force measuring device can be said to be ready for adhesive force measurement. Thereafter, the operator can prepare the sample (90), secure the sample (90) to the sample mounting table (60), and then attach the extension film to the clamp.

[0134] To collect data, you can first initialize the adhesion gauge. That is, by pressing "zero," the current measurement value (i.e., the measurement value during the adhesion preparation phase) will be reset to zero. Then, you can launch the data collection software on the external terminal and enter "Start data collection." This data collection start will allow the external terminal to receive and collect data through the adhesion gauge.

[0135] The operator can select an end position (75d) via the interface screen (70). That is, the operator can command the adhesive force gauge to move from the start position to the end position. This command activates the servo motor, causing the adhesive force gauge (50) to move until it reaches the end position, thereby measuring the adhesive force. Of course, the measured data can be transmitted to an external terminal for collection.

[0136] The aforementioned adhesive force measurement execution and data collection (S50) can be performed by confirming the zero point of the gauge (50), inputting a measurement start input in the measurement software, and then inputting an end position (75d). Thereafter, the adhesive force gauge moves linearly while peeling off the separator, measuring the adhesive force in real time and transmitting it to an external terminal.

[0137] While the adhesive force gauge is moving, the end position (75d) is activated, and when the movement stops, activation is terminated. That is, adhesive force collection is terminated. Thereafter, the user inputs an end data collection command on the external terminal. This terminates the collection of adhesive force data for the corresponding sample on the external terminal (80). The collected data is stored on the external terminal, and the collected data can be analyzed by executing an analysis program and retrieving the collected data.

[0138] For data analysis, you can input configuration parameters. For example, the distance range within which the average adhesive strength is required can be set, and the scale of the x-axis corresponding to the distance axis and the scale of the y-axis corresponding to the adhesive strength axis can be input as parameters. An adhesive strength graph is then displayed, allowing for adhesive strength analysis.

[0139] Although the adhesive gauge itself moves linearly via a servo motor, it cannot sense the location where the separator is peeled off. Therefore, the adhesive gauge can only transmit data on the adhesive strength and measurement time measured by the external terminal. In other words, the distance (mm) data shown in Figure 7(a) cannot be collected via the adhesive gauge.

[0140] Therefore, the servo motor's movement speed, i.e., the start and end speeds, can be set to be the same, and the speed information can be input as a parameter into a data collection or analysis program on an external terminal. Since the adhesive force gauge moves at a constant speed, the product of speed and time can be calculated as distance.

[0141] Here, the start of data collection and the start of the adhesion gauge movement may not precisely coincide. The adhesion gauge may begin moving after data collection begins, or conversely, data collection may begin after the adhesion gauge begins moving. This is because data collection begins with a start input from an external terminal, while the start of the adhesion gauge movement is initiated with an end position movement input on the interface screen.

[0142] When the clamp and extension film are joined, the extension film may not be sufficiently tensioned. Therefore, at the initial stage of the adhesion gauge's movement, the extension film is tensioned before the separator film is peeled off. In other words, the effective adhesion can be measured only after the separator film begins to peel off.

[0143] Therefore, the distance shown in Fig. 7 is approximately the movement distance of the adhesive gauge, but does not necessarily have the same value.

[0144] The adhesive strength gauge (50) outputs the adhesive strength measured at preset time intervals, and the output data can be input to an external terminal and recorded. Since the adhesive strength gauge (50) moves at a constant speed, the position and positional changes of the adhesive strength gauge (50) over time can be calculated, and thus the position and positional changes at which the separator is peeled can be calculated.

[0145] Meanwhile, a PLC control unit for driving a servo motor (40) can be located at the bottom of the base plate (20), and the adhesive force gauge can be linearly moved back and forth as the screw stroke is operated by driving the servo motor.

[0146] As described in the detailed description of the invention.

Claims

1. In a portable adhesive strength measuring device for measuring the adhesive strength of the electrode and separator of a secondary battery, A case with a cover and storage space inside; A base plate provided inside the case and exposed to the outside when the cover is open; A sample mounting table provided on one side of the base plate and protruding from the base plate to a predetermined height to secure a sample for measuring adhesive strength; A linear moving table provided in a straight line with the sample mounting portion on the table; An adhesion gauge having a clamp connected to the separator of the sample and mounted on the linear moving table to acquire adhesion data while moving linearly; and A portable adhesive strength measuring device comprising an interface screen for controlling movement of the linear moving table.

2. In paragraph 1, A portable adhesive force measuring device comprising a gauge mounting plate movably provided on the linear moving table and on which the adhesive force gauge is mounted.

3. In paragraph 2, A portable adhesion measuring instrument, wherein the linear moving table and the sample settling table have a protrusion height determined relative to the base plate such that the clamp of the mounted adhesion gauge and the sample are horizontal.

4. In paragraph 2, A portable adhesion measuring device characterized in that the adhesion gauge is linearly moved by linear movement of the gauge mounting plate on the linear moving table.

5. In paragraph 4, A portable adhesive strength measuring device characterized in that the adhesive strength gauge is provided to output the adhesive strength measured at preset time intervals.

6. In paragraph 5, A portable adhesive strength measuring device characterized in that data output from the adhesive strength gauge is transmitted to an external terminal via a connection line.

7. In paragraph 1, In the above interface screen, Origin movement menu of the above adhesive gauge; A start position menu indicating that the above adhesive gauge is at the start position; and A portable adhesive strength meter characterized by displaying an end position menu indicating the end position at which the adhesive strength meter moves to end measurement.

8. In paragraph 7, A portable adhesive strength measuring device characterized in that when the above origin movement menu is entered, the adhesive strength gauge is moved to the origin position.

9. In paragraph 8, A portable adhesive force measuring device characterized in that the adhesive force gauge moves to the origin position and then sequentially moves to the ready position and the start position.

10. In paragraph 9, A portable adhesive force measuring device characterized in that when the adhesive force gauge is moved to the start position and the end position menu is entered, the adhesive force gauge moves linearly at a constant speed to the end position.

11. In a portable adhesive strength measurement system for measuring the adhesive strength of the electrode and separator of a secondary battery, A case with a cover and storage space inside; A base plate provided inside the case and exposed to the outside when the cover is open; A sample mounting table provided on one side of the base plate and protruding from the base plate to a predetermined height to secure a sample for measuring adhesive strength; A linear moving table provided in a straight line with the sample mounting portion on the table; An adhesion gauge having a clamp connected to the separator of the sample and mounted on the linear movement table to acquire adhesion data while moving linearly; An interface screen for controlling the movement of the above linear moving table; and A portable adhesion measurement system including an external terminal that is connected to the adhesion gauge and is equipped to collect and analyze adhesion data output from the adhesion gauge.

12. In paragraph 11, A portable adhesive strength measuring system characterized in that the adhesive strength gauge and the external terminal are connected via a connecting line.

13. In paragraph 12, A gauge mounting table is provided that is linearly movable on the linear moving table and on which the adhesive gauge is mounted, A portable adhesive strength measurement system characterized by including a servo motor driven for forward and backward linear movement of the gauge mounting table at one end of the linear movement table.

14. In paragraph 12, A portable adhesive strength measurement system characterized in that a PLC control unit for controlling and powering the servo motor and the interface screen is located at the bottom of the base plate.

15. In paragraph 14, A portable adhesive strength measuring system, characterized in that the adhesive strength gauge receives power from the external terminal through the connecting line.

16. In paragraph 14, The above servo motor is driven to move the gauge mounting table linearly at a preset constant speed, A portable adhesive strength measuring system characterized in that the adhesive strength gauge is provided to output the adhesive strength measured at preset time intervals.

17. In paragraph 12, A portable adhesive strength measurement system characterized in that the external terminal is a tablet PC, and a fixing protrusion is formed on the cover so that the external terminal can be supported when the cover is fully open.

18. In paragraph 12, A portable adhesive strength measurement system characterized in that after execution of the adhesive strength collection software installed in the external terminal and input of start of data collection, the data is recorded in the external terminal.

19. In Article 18, A portable adhesive strength measurement system characterized in that after the data collection end input of the adhesive strength collection software installed on the external terminal, the data recording is ended on the external terminal.

20. In paragraph 12, A portable adhesive strength measurement system characterized in that a graph of adhesive strength for a location of a separator is generated and displayed based on the collected data by executing adhesive strength analysis software installed on the external terminal.

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