Pole piece extension device

Abstract

The utility model provides a pole piece extension device, and relates to the technical field of pole piece extension rate detection, the pole piece extension device comprises a first pair of rollers, the first pair of rollers is used for rolling a pole piece, and a code spraying assembly, a first color code assembly, a second pair of rollers and a second color code assembly are sequentially arranged in the transmission direction of the pole piece; the code spraying assembly is used for spraying pigment to the pole pieces, the first color code assembly is used for detecting the area of the sprayed dye on the pole pieces which do not pass through the first pair of rollers, and the second color code assembly is used for detecting the area of the sprayed dye on the pole pieces which pass through the first pair of rollers. According to the pole piece extension device provided by the utility model, the first pair of rollers are used for rolling the pole piece, the code spraying assembly is used for spraying pigment on the pole piece, and the first color code assembly and the second color code assembly are used for respectively measuring the area of the pole piece sprayed with the dye and calculating to obtain the extension rate rolled by the first pair of rollers; manual shutdown, cutting and measurement of personnel are avoided, the production efficiency is improved, and material waste is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pole piece extension rate detection, in particular to a pole piece extension device. Background Art

[0002] Lithium-ion battery pole pieces typically undergo a roll-pressing process during manufacturing to improve the battery's energy density and conductivity. The mechanical properties and elongation of the rolled pole piece directly affect the actual surface density and winding consistency, thus affecting battery performance.

[0003] Currently, most elongation tests rely on offline manual measurement. These methods estimate the elongation of a pole piece by measuring its surface density before rolling and comparing it to that after rolling, or by marking a length before rolling and comparing the change in the mark after rolling. This results in complex operations, reduced production efficiency, limited accuracy, and pole piece waste.

[0004] Some methods use the tape speed to measure the elongation, but they do not take the unwinding and rewinding speeds into consideration. Instead, they only calculate the elongation by the difference in tape speeds, which results in large errors.

[0005] In addition, traditional methods make it difficult to monitor the extension of the electrode during the rolling process in real time. Utility Model Content

[0006] The purpose of the utility model is to provide a pole piece extension device to solve the technical problem that the traditional method cannot monitor the extension of the pole piece in the rolling process in real time.

[0007] The utility model provides a pole piece extending device, comprising a first pair of rollers, wherein the first pair of rollers is used to roll the pole piece, and a coding component, a first color code component, a first pair of rollers and a second color code component are sequentially arranged in the transmission direction of the pole piece;

[0008] The coding assembly is used to spray paint onto the pole piece, the first color code assembly is used to detect the area of ​​the sprayed dye on the pole piece that has not passed through the first pair of rollers, and the second color code assembly is used to detect the area of ​​the sprayed dye on the pole piece that has passed through the first pair of rollers.

[0009] In an optional embodiment, it further includes a first guide rail, the length direction of which is perpendicular to the transmission direction of the pole piece and is arranged horizontally; the coding assembly is slidably arranged on the first guide rail, and the coding assembly can be moved and fixed along the length direction of the first guide rail.

[0010] In an optional embodiment, a second guide rail is further included, wherein the length direction of the second guide rail is perpendicular to the transmission direction of the pole piece and is arranged horizontally;

[0011] The first color standard component is slidably arranged on the second guide rail, and the first color standard component can be moved and fixed along the length direction of the second guide rail.

[0012] In an optional embodiment, a third guide rail is further included, wherein the length direction of the third guide rail is perpendicular to the transmission direction of the pole piece and is arranged horizontally;

[0013] The second color standard component is slidably arranged on the third guide rail, and the second color standard component can be moved and fixed along the length direction of the third guide rail.

[0014] In an optional embodiment, it also includes a front conveying roller and a rear conveying roller, and the front conveying roller, a first pair of rollers and a rear conveying roller are arranged in sequence along the transmission direction of the pole piece; and the coding assembly is located between the front conveying roller and the first pair of rollers, and the second color code assembly is located between the first pair of rollers and the rear conveying roller.

[0015] In an optional embodiment, the front conveying roller and the rear conveying roller are located on the same horizontal plane, and the front conveying roller and the rear conveying roller cooperate to make the pole piece located between the front conveying roller and the rear conveying roller horizontal.

[0016] In an optional embodiment, the coding component includes a coding printer.

[0017] In an optional embodiment, the first color mark component and the second color mark component both include color mark sensors.

[0018] The first pair of rollers of the pole piece extension device provided by the utility model is used to roll the pole piece, the coding component is used to spray paint on the pole piece, the first color code component and the second color code component respectively measure the area of ​​the dye sprayed on the pole piece and calculate the extension rate after rolling by the first pair of rollers; manual shutdown, cutting and measurement by personnel are avoided, production efficiency is improved and material waste is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic structural diagram of the pole piece extension device in use according to an embodiment of the present invention;

[0021] Figure 2Provide a schematic structural diagram of the pole piece in the use state of your pole piece extension device for an embodiment of the utility model.

[0022] Icon: 100-first guide rail; 200-inkjet coding assembly; 300-second guide rail; 400-first color code assembly; 500-third guide rail; 600-second color code assembly; 700-front conveyor roller; 800-rear conveyor roller; 900-first pair of rollers; 110-marking area. DETAILED DESCRIPTION

[0023] The terms "first", "second", "third", etc. are only used to distinguish and describe, and do not indicate the order of arrangement, nor can they be understood as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0025] In the description of this application, it should be noted that the terms "inside", "outside", "left", "right", "up", "down", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0026] In the description of this application, unless otherwise clearly specified and limited, the terms "set", "install", "connected" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the internal parts of two elements.

[0027] The technical solution of this application will be clearly and completely described below with reference to the accompanying drawings.

[0028] Reference Figure 1 and Figure 2 The present invention provides a pole piece extending device, comprising a first pair of rollers 900, wherein the first pair of rollers 900 is used to roll the pole piece, and a coding assembly 200, a first color code assembly 400, the first pair of rollers 900 and a second color code assembly 600 are sequentially arranged in the transmission direction of the pole piece;

[0029] The coding assembly 200 is used to spray paint onto the electrode, the first color code assembly 400 is used to detect the area of ​​the dye sprayed on the electrode that has not passed through the first pair of rollers 900, and the second color code assembly 600 is used to detect the area of ​​the dye sprayed on the electrode that has passed through the first pair of rollers 900.

[0030] In some embodiments, the inkjet coding component 200 of the electrode extension device is used to spray azo compounds (AZO) that can be thermally decomposed at low temperature onto the electrode and form a marking area 110; the first color code component 400 detects the area S1 of the marking area 110 on the electrode that has not been rolled by the first pair of rollers 900, and the second color code component 600 detects the area S2 of the marking area 110 on the electrode that has been rolled by the first pair of rollers 900. At this time, the electrode extension rate δ = (S2-S1) / S1 can be obtained.

[0031] The thickness of the paint sprayed on the electrode by the coding component 200 is controlled at 1±0.5μm; after the rolled electrode enters the oven, the components of the azo compound can be decomposed during the drying process of the battery electrode to avoid the introduction of impurities; the nitrogen generated is an inert gas, which reduces the oxidation reaction during the drying process.

[0032] In an optional embodiment, it also includes a first guide rail 100, the length direction of which is perpendicular to the transmission direction of the pole piece and is arranged horizontally; the coding assembly 200 is slidably set on the first guide rail 100, and the coding assembly 200 can be moved and fixed along the length direction of the first guide rail 100.

[0033] In an optional embodiment, a second guide rail 300 is further included, wherein the length direction of the second guide rail 300 is perpendicular to the transmission direction of the pole piece and is arranged horizontally;

[0034] The first color standard assembly 400 is slidably disposed on the second guide rail 300 , and the first color standard assembly 400 can be moved and fixed along the length direction of the second guide rail 300 .

[0035] In an optional embodiment, a third guide rail 500 is further included, wherein the length direction of the third guide rail 500 is perpendicular to the transmission direction of the pole piece and is arranged horizontally;

[0036] The second color standard assembly 600 is slidably disposed on the third guide rail 500 , and the second color standard assembly 600 can be moved and fixed along the length direction of the third guide rail 500 .

[0037] In some embodiments, the first guide rail 100, the second guide rail 300 and the third guide rail 500 are arranged in parallel. Taking the first guide rail 100 as an example, a sliding component can be provided on the first guide rail 100. For example, a first slider is slidingly provided on the first guide rail 100, and the coding component 200 is provided on the first slider.

[0038] In this way, the coding assembly 200 can be moved along the length direction of the first guide rail 100, thereby adjusting the position of the coding assembly 200; a locking piece is screwed on the first slider, and the locking piece is rotated to abut against the first guide rail 100, so that the first slider cannot move on the first guide rail 100, thereby fixing the coding assembly 200.

[0039] In an optional embodiment, it further includes a front conveying roller 700 and a rear conveying roller 800, and the front conveying roller 700, a first pair of rollers 900 and a rear conveying roller 800 are arranged in sequence along the transmission direction of the pole piece; and the coding assembly 200 is located between the front conveying roller 700 and the first pair of rollers 900, and the second color code assembly 600 is located between the first pair of rollers 900 and the rear conveying roller 800.

[0040] In an optional embodiment, the front conveying roller 700 and the rear conveying roller 800 are located on the same horizontal plane, and the front conveying roller 700 and the rear conveying roller 800 cooperate to make the pole piece located between the front conveying roller 700 and the rear conveying roller 800 horizontal.

[0041] A first pair of rollers 900 is provided between the front conveying roller 700 and the rear conveying roller 800. The front conveying roller 700 and the rear conveying roller 800 cooperate to move the electrode piece and keep the electrode piece horizontal, so that the first color standard component 400 and the second color standard component 600 can more accurately measure the area of ​​the marking area 110 on the electrode piece.

[0042] In an optional embodiment, the coding component 200 includes a coding printer.

[0043] In an optional embodiment, both the first color standard component 400 and the second color standard component 600 include color standard sensors.

[0044] The inkjet printer assembly 200 includes an inkjet printer. The first color mark assembly 400 and the second color mark assembly 600 both include color mark sensors. The color mark sensors support color recognition and analysis and can accurately measure areas. KEYENCE color mark sensors are generally selected.

[0045] The inkjet printer uses thermally decomposable dyes, which can be azo dyes, acridine dyes, or halogenated fluorescent dyes.

[0046] The first pair of rollers 900 of the electrode stretching device provided by the present invention is used to roll the electrode, the coding component 200 is used to spray paint on the electrode, the first color code component 400 and the second color code component 600 respectively measure the area of ​​the dye sprayed on the electrode and calculate the stretching rate after rolling by the first pair of rollers 900; manual shutdown, cutting and measurement by personnel are avoided, production efficiency is improved and material waste is reduced.

[0047] The pole piece extension device can automatically measure the pole piece extension rate after rolling online, improve production efficiency, and reduce material waste. The pigment sprayed on the pole piece can be decomposed by heat in subsequent processes without introducing impurities, and the decomposition products can help improve the process technology.

[0048] Calculating elongation by area is more accurate and uses more samples than length and speed calculations. It also allows for visualizing differences. By comparing the images of the marked area 110 before and after rolling, process consistency can be reflected and areas of equipment anomalies can be identified promptly.

[0049] Thermally decomposable dyes are used to decompose into nitrogen gas during the drying process. This is more stable than laser marking (which damages the integrity of the electrode) or labeling. Furthermore, nitrogen gas reduces the oxygen content in the oven, minimizing oxidation reactions.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pole piece extension device, characterized in that: The invention comprises a first pair of rollers (900) for rolling the electrode sheet, wherein a coding assembly (200), a first color code assembly (400), the first pair of rollers (900) and a second color code assembly (600) are sequentially arranged in the transmission direction of the electrode sheet; The coding assembly (200) is used to spray paint onto the electrode piece, the first color code assembly (400) is used to detect the area of ​​the sprayed dye on the electrode piece that has not passed through the first pair of rollers (900), and the second color code assembly (600) is used to detect the area of ​​the sprayed dye on the electrode piece that has passed through the first pair of rollers (900).

2. The pole piece extension device according to claim 1, characterized in that: The invention also comprises a first guide rail (100), wherein the length direction of the first guide rail (100) is perpendicular to the transmission direction of the pole piece and is arranged horizontally; the coding assembly (200) is slidably arranged on the first guide rail (100), and the coding assembly (200) can be moved and fixed along the length direction of the first guide rail (100).

3. The pole piece extension device according to claim 1, characterized in that: It also includes a second guide rail (300), wherein the length direction of the second guide rail (300) is perpendicular to the transmission direction of the pole piece and is arranged horizontally; The first color standard component (400) is slidably arranged on the second guide rail (300), and the first color standard component (400) can be moved and fixed along the length direction of the second guide rail (300).

4. The pole piece extension device according to claim 1, characterized in that: It also includes a third guide rail (500), wherein the length direction of the third guide rail (500) is perpendicular to the transmission direction of the pole piece and is arranged horizontally; The second color standard component (600) is slidably arranged on the third guide rail (500), and the second color standard component (600) can be moved and fixed along the length direction of the third guide rail (500).

5. The pole piece extension device according to claim 1, characterized in that: The invention also comprises a front conveying roller (700) and a rear conveying roller (800), wherein the front conveying roller (700), a first pair of rollers (900) and a rear conveying roller (800) are sequentially arranged along the transmission direction of the electrode piece; the coding assembly (200) is located between the front conveying roller (700) and the first pair of rollers (900), and the second color code assembly (600) is located between the first pair of rollers (900) and the rear conveying roller (800).

6. The pole piece extension device according to claim 5, characterized in that: The front conveying roller (700) and the rear conveying roller (800) are located on the same horizontal plane, and the front conveying roller (700) and the rear conveying roller (800) cooperate to make the pole piece located between the front conveying roller (700) and the rear conveying roller (800) be horizontal.

7. The pole piece extension device according to claim 1, characterized in that: The inkjet printer component (200) includes an inkjet printer.

8. The pole piece extension device according to claim 1, characterized in that: The first color mark component (400) and the second color mark component (600) both include color mark sensors.

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