Membrane electrode production equipment

Abstract

The utility model relates to membrane electrode production equipment, and belongs to the technical field of battery electrode preparation, the membrane electrode production equipment comprises a feeding device, a first hot roller device, a plurality of second hot roller devices and a plurality of heating devices, the first hot roller device is used for receiving mixed powder provided by the feeding device and rolling the mixed powder into a semi-finished product membrane electrode, and the second hot roller device is used for heating the semi-finished product membrane electrode; the plurality of second hot roller devices are used for rolling the semi-finished membrane electrode into a finished membrane electrode, the plurality of heating devices are arranged in front of the plurality of second hot roller devices in a one-to-one correspondence manner, and the heating devices are used for heating the semi-finished membrane electrode. According to the membrane electrode production equipment provided by the invention, the heating device and the hot roller device act together, the semi-finished membrane electrode is softened before rolling, fiber breakage of a binder is reduced, the compressive resistance of the binder is reduced, the surface density and toughness of the semi-finished membrane electrode are improved, and the production quality and production efficiency of the finished membrane electrode are improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery electrode preparation, and in particular to a membrane electrode production device. Background Art

[0002] Electrodes are the key to determining the energy density and cycle performance of batteries. In the existing technology, dry electrode processes are gradually being used to produce membrane electrodes. The dry electrode process generally uses a binder fiberization method, and its main process is to perform multi-stage rolling of a mixed powder containing a preliminarily fiberized binder, an active material, and a conductive agent. The friction during the rolling process causes the binder to further fiberize and prepare a membrane electrode. However, during the rolling process at each level, different materials will have a high resistance to pressure. If the binder fibers are subjected to excessive pressure, they may break, which will greatly reduce the production quality of the membrane electrode. Utility Model Content

[0003] Based on this, it is necessary to provide a membrane electrode production equipment to solve the technical problem in the prior art that poor rolling effect affects the quality of the membrane electrode.

[0004] To achieve the above-mentioned purpose, the present application provides a membrane electrode production device, which includes:

[0005] A feeding device, used for providing mixed powder;

[0006] The first hot roller device is used to receive the mixed powder provided by the feeding device and roll the mixed powder into a semi-finished membrane electrode;

[0007] A plurality of second hot roller devices, used for rolling the semi-finished membrane electrode into a finished membrane electrode; and

[0008] A plurality of heating devices are arranged one by one in front of the plurality of second hot roller devices, and the heating devices are used to heat the semi-finished membrane electrode.

[0009] Optionally, the heating device is a sheet-shaped structure.

[0010] Optionally, the heating device comprises:

[0011] A first heating plate is disposed on one side of the semi-finished membrane electrode; and

[0012] The second heating plate is arranged on the other side of the semi-finished membrane electrode.

[0013] Optionally, the membrane electrode production equipment further comprises:

[0014] A first tension adjusting device, disposed between the first heat roller device and the second heat roller device, the first tension adjusting device being used to adjust the tension of the semi-finished membrane electrode between the first heat roller device and the second heat roller device; and

[0015] A second tension adjusting device is arranged between two adjacent second heat roller devices, and the first tension adjusting device is used to adjust the tension of the semi-finished membrane electrode between the two adjacent second heat roller devices;

[0016] The adjustment accuracy of the first tension adjusting device is higher than that of the second tension adjusting device.

[0017] Optionally, the first tension adjusting device comprises:

[0018] First roller;

[0019] A first tension roller, spaced apart from the first passing roller;

[0020] A first tension sensor is mounted on the first tension roller;

[0021] A floating roller located in the middle of the first passing roller and the first tension roller in a horizontal direction; and

[0022] The linear drive mechanism is used to drive the floating roller to move in the vertical direction.

[0023] Optionally, the linear drive mechanism adopts a ball screw.

[0024] Optionally, the second tension adjusting device comprises:

[0025] Second roller;

[0026] The second tension roller is set at a distance from the second passing roller;

[0027] A second tension sensor is installed on the second tension roller;

[0028] A swing roller, located in the middle of the second passing roller and the second tension roller in the horizontal direction; and

[0029] The swing driving mechanism is used for driving the swing roller to swing towards a direction close to the second tension roller or away from the second tension roller.

[0030] Optionally, the membrane electrode production equipment further comprises a winding device, which is used to wind up the finished membrane electrode rolled by the second hot roller device.

[0031] Optionally, a third tension adjusting device is further provided between the second hot roller device and the winding device.

[0032] Optionally, the membrane electrode production equipment further comprises a cutting device for cutting the finished membrane electrode, and the cutting device is arranged between the second hot roller device and the winding device.

[0033] The beneficial effect of the membrane electrode production equipment provided by the present application is that compared with the prior art, the membrane electrode production equipment of the present application includes a feeding device, a first hot roller device, multiple second hot roller devices and multiple heating devices. The first hot roller device rolls the mixed powder into a semi-finished membrane electrode, and the second hot roller device rolls the semi-finished membrane electrode into a finished membrane electrode. The heating device is arranged in front of the second hot roller device. The heating device preheats the semi-finished membrane electrode before rolling to soften the semi-finished membrane electrode. The heating device and the hot roller device work together to reduce the fiber breakage of the binder, reduce the pressure resistance of the binder, promote fiberization, and improve the surface density and toughness of the semi-finished membrane electrode. The conveying speed of the semi-finished membrane electrode can be appropriately increased, thereby improving the production quality and production efficiency of the finished membrane electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of the internal structure of a membrane electrode production device provided in an embodiment of the present application;

[0036] Figure 2 Schematic diagram of the use principle of the roll removal stand of the membrane electrode production equipment provided in an embodiment of the present application.

[0037] Description of reference numerals:

[0038] 1. Feeding device;

[0039] 2. first hot roller device; 210. roller; 220. fixed frame; 230. roller; 240. first slide;

[0040] 3. The second hot roller device;

[0041] 4. Heating device; 410. First heating plate; 420. Second heating plate;

[0042] 5. First tension adjustment device; 510. First passing roller; 520. First tension roller; 530. Floating roller; 540. Linear drive mechanism;

[0043] 6. Second tension adjustment device; 610. Second over roller; 620. Second tension roller; 630. Swing roller; 640. Swing drive mechanism;

[0044] 7. Winding device;

[0045] 8. The third tension adjustment device;

[0046] 9. Cutting device;

[0047] 100, semi-finished membrane electrode; 200, finished membrane electrode; 300, roller dismantling frame; 301, second chute. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0049] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0054] The embodiments of the present application provide a membrane electrode production device, please refer to Figure 1 and Figure 2 The membrane electrode production equipment includes a feeding device 1, a first hot roller device 2, a plurality of second hot roller devices 3 and a plurality of heating devices 4, wherein the feeding device 1 is used to provide mixed powder; the first hot roller device 2 is used to receive the mixed powder provided by the feeding device 1 and roll the mixed powder into a semi-finished membrane electrode 100; the plurality of second hot roller devices 3 are used to roll the semi-finished membrane electrode 100 into a finished membrane electrode 200; the plurality of heating devices 4 are arranged one by one in front of the plurality of second hot roller devices 3, and the heating devices 4 are used to heat the semi-finished membrane electrode 100.

[0055] In an embodiment of the present application, the membrane electrode production equipment includes a feeding device 1, a first hot roller device 2, multiple second hot roller devices 3 and multiple heating devices 4. The first hot roller device 2 rolls the mixed powder into a semi-finished membrane electrode 100, and the second hot roller device 3 rolls the semi-finished membrane electrode 100 into a finished membrane electrode 200. The heating device 4 is arranged in front of the second hot roller device 3. The heating device 4 preheats the semi-finished membrane electrode 100 before rolling to soften the semi-finished membrane electrode 100. The heating device 4 and the hot roller device work together to reduce the fiber breakage of the binder, reduce the pressure resistance of the binder, promote fiberization, and improve the surface density and toughness of the semi-finished membrane electrode 100. The conveying speed of the semi-finished membrane electrode 100 can be appropriately increased, thereby improving the production quality and production efficiency of the finished membrane electrode 200.

[0056] In one embodiment, see Figure 1The heating device 4 is a sheet-shaped structure, which can provide a better and more uniform heating effect for the semi-finished membrane electrode 100.

[0057] In one embodiment, see Figure 1 The heating device 4 includes a first heating plate 410 and a second heating plate 420. The first heating plate 410 is arranged on one side of the semi-finished membrane electrode 100; the second heating plate 420 is arranged on the other side of the semi-finished membrane electrode 100. The first heating plate 410 and the second heating plate 420 are arranged on both sides of the semi-finished membrane electrode 100, so that the heating effect of the semi-finished membrane electrode 100 is more uniform.

[0058] In one embodiment, see Figure 1 The membrane electrode production equipment also includes a first tension adjusting device 5 and a second tension adjusting device 6. The first tension adjusting device 5 is arranged between the first hot roller device 2 and the second hot roller device 3, and the first tension adjusting device 5 is used to adjust the tension of the semi-finished membrane electrode 100 between the first hot roller device 2 and the second hot roller device 3; the second tension adjusting device 6 is arranged between two adjacent second hot roller devices 3, and the first tension adjusting device 5 is used to adjust the tension of the semi-finished membrane electrode 100 between two adjacent second hot roller devices 3; wherein the adjustment accuracy of the first tension adjusting device 5 is higher than the adjustment accuracy of the second tension adjusting device 6.

[0059] It can be understood that the toughness of the semi-finished membrane electrode 100 just rolled by the mixed powder through the first hot roller device 2 is poor, and it is easy to break if the tensile force is too large. The adjustment accuracy of the first tension adjustment device 5 of the present application is higher than the adjustment accuracy of the second tension adjustment device 6. The first tension adjustment device 5 can provide a high-precision tension adjustment for the semi-finished membrane electrode 100 just rolled to avoid the breakage of the semi-finished membrane electrode 100; and the semi-finished membrane electrode 100 that subsequently passes through the second hot roller device 3 has a higher toughness and can withstand a larger tensile force. Therefore, the second tension adjustment device 6 with relatively low adjustment accuracy but low cost can be used to adjust the tension of the semi-finished membrane electrode 100, which reduces the cost overall.

[0060] In one embodiment, see Figure 1 The first tension adjusting device 5 includes a first passing roller 510, a first tension roller 520, a first tension sensor, a floating roller 530 and a linear drive mechanism 540. The first tension roller 520 is spaced apart from the first passing roller 510. The first tension sensor is mounted on the first tension roller 520. The floating roller 530 is located in the middle of the first passing roller 510 and the first tension roller 520 in the horizontal direction. The linear drive mechanism 540 is used to drive the floating roller 530 to move in the vertical direction.

[0061] Specifically, the linear drive mechanism 540 controls the floating roller 530 to perform reciprocating linear displacement motion. When the floating roller 530 moves, the angle between the semi-finished membrane electrode 100 on both sides of the first tension roller 520 remains unchanged. Since the tension of the semi-finished membrane electrode 100 on the inlet and outlet sides of the first tension roller 520 is consistent, the direction of the resultant force acting on the first tension roller 520 is fixed, making it easier to achieve dual closed-loop control accuracy of the conveying speed and tension of the semi-finished membrane electrode 100, thereby improving the production quality and efficiency of the finished membrane electrode 200.

[0062] In one embodiment, the linear drive mechanism 540 uses a ball screw, which is composed of a screw, a nut, a steel ball, a pre-load plate, a reverser, and a dust collector. It can convert rotational motion into linear motion and has the advantages of low friction loss, high transmission efficiency, high precision, and the ability to ensure precise micro-feeding.

[0063] In one embodiment, see Figure 1 The second tension adjusting device 6 includes a second over roller 610, a second tension roller 620, a second tension sensor, a swing roller 630 and a swing driving mechanism 640. The second tension roller 620 is spaced apart from the second over roller 610. The second tension sensor is mounted on the second tension roller 620. The swing roller 630 is located in the middle of the second over roller 610 and the second tension roller 620 in the horizontal direction. The swing driving mechanism 640 is used to drive the swing roller 630 to swing toward or away from the second tension roller 620.

[0064] Specifically, the swing roller 630 swings under the drive of the swing driving mechanism 640 , and the swing roller 630 has a fast movement speed and high tension adjustment efficiency.

[0065] In one embodiment, see Figure 1 The membrane electrode production equipment also includes a winding device 7, which is used to wind up the finished membrane electrode 200 rolled by the second hot roller device 3.

[0066] In one embodiment, see Figure 1 A third tension adjusting device 8 is also provided between the second hot roller device 3 and the winding device 7. The structure of the third tension adjusting device 8 is the same as that of the second tension adjusting device 6, and will not be described in detail herein.

[0067] In one embodiment, see Figure 1 The membrane electrode production equipment also includes a cutting device 9 for cutting the finished membrane electrode 200 , and the cutting device 9 is arranged between the second hot roller device 3 and the winding device 7 .

[0068] In one embodiment, the first heat roller device 2 and the second heat roller device 3 are slidable on the main body of the membrane electrode production equipment, which is convenient for installation and disassembly and simple for maintenance and overhaul.

[0069] For example, the first hot roller device 2 is used as an example for explanation. Figure 2 The first hot roller device 2 includes Figure 2 Two rollers 210 are arranged on the left and right sides of the frame. The two rollers 210 are connected to two motors through couplings respectively. The rollers 210 are rotatably installed in a fixed frame 220. A roller 230 is arranged at the bottom of the fixed frame 220.

[0070] Specifically, when the first hot roller device 2 is actually disassembled, the couplings of the two rollers 210 are first disassembled, and then the lifting cylinder is used to lift the rollers 210. Figure 2 The mounting frame 220 of the roller 210 on the left side is moved to the left by about 10 mm to prevent the left and right mounting frames 220 from being too close to each other and scratching each other; then, the mounting frame 220 that has been moved to the left is lifted up by about 8 mm, and then a guide rail is installed at the bottom of the lifted mounting frame 220, and a first slide groove 240 is provided on the top surface of the guide rail; after the guide rail is installed, the lifting cylinder moves the mounting frame 220 downward again until the roller 230 at the bottom of the mounting frame 220 is placed in the first slide groove 240.

[0071] Furthermore, another purpose of lifting the mounting frame 220 is to separate the mounting frame 220 from the wear-resistant plate on the first hot roller device 2 to avoid scratching each other between the mounting frame 220 and the wear-resistant plate when the mounting frame 220 is pushed out.

[0072] It is understandable that after the roller 230 at the bottom of the mounting frame 220 is placed in the first slide groove 240, the screws of the lifting cylinder used to lift the mounting frame 220 are adjusted to the lowest position to prevent interference between them.

[0073] Furthermore, the membrane electrode production equipment of the present application is equipped with a roller removal frame 300, and a second slide groove 301 is arranged on the top surface of the roller removal frame 300. The second slide groove 301 can be spliced ​​with the first slide groove 240, and the roller 230 of the left installation frame 220 can move from the first slide groove 240 to the second slide groove 301 without hindrance, and the installation frame 220 and the roller 210 in the installation frame 220 can be lifted away by a crane.

[0074] It can be understood that, except that the roller 210 on the right side does not need to be moved to the left, the remaining steps are substantially the same as the disassembly process of the roller 210 on the left side, and will not be described in detail here.

[0075] It is understandable that the installation process of the roller 210 can be regarded as the opposite of the above-mentioned disassembly process, so that the installation and disassembly of the roller 210 of the first hot roller device 2 are simple and convenient.

[0076] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A membrane electrode production equipment, characterized in that: include: A feeding device, used for providing mixed powder; A first hot roller device is used to receive the mixed powder provided by the feeding device and roll the mixed powder into a semi-finished membrane electrode; A plurality of second hot roller devices, used for rolling the semi-finished membrane electrode into a finished membrane electrode; as well as A plurality of heating devices are arranged one by one in front of the plurality of the second hot roller devices, and the heating devices are used to heat the semi-finished membrane electrode.

2. The membrane electrode production equipment according to claim 1, characterized in that: The heating device is a sheet-shaped structure.

3. The membrane electrode production equipment according to claim 2, characterized in that: The heating device comprises: A first heating plate, disposed on one side of the semi-finished membrane electrode; and The second heating plate is arranged on the other side of the semi-finished membrane electrode.

4. The membrane electrode production equipment according to claim 1, characterized in that: The membrane electrode production equipment also includes: A first tension adjusting device, disposed between the first heat roller device and the second heat roller device, the first tension adjusting device being used to adjust the tension of the semi-finished membrane electrode between the first heat roller device and the second heat roller device; and A second tension adjusting device is arranged between two adjacent second heat roller devices, and the first tension adjusting device is used to adjust the tension of the semi-finished membrane electrode between the two adjacent second heat roller devices; Wherein, the adjustment accuracy of the first tension adjustment device is higher than the adjustment accuracy of the second tension adjustment device.

5. The membrane electrode production equipment according to claim 4, characterized in that: The first tension adjusting device comprises: First roller; A first tension roller, spaced apart from the first passing roller; A first tension sensor, mounted on the first tension roller; a floating roller, located in the middle of the first passing roller and the first tension roller in a horizontal direction; and The linear drive mechanism is used to drive the floating roller to move in a vertical direction.

6. The membrane electrode production equipment according to claim 5, characterized in that: The linear drive mechanism adopts a ball screw.

7. The membrane electrode production equipment according to claim 4, characterized in that: The second tension adjusting device comprises: Second roller; A second tension roller, spaced apart from the second passing roller; A second tension sensor is mounted on the second tension roller; a swing roller, located in the middle of the second passing roller and the second tension roller in the horizontal direction; and The swing driving mechanism is used to drive the swing roller to swing towards a direction close to the second tension roller or away from the second tension roller.

8. The membrane electrode production equipment according to claim 1, characterized in that: The membrane electrode production equipment also includes a winding device, which is used to wind up the finished membrane electrode rolled by the second hot roller device.

9. The membrane electrode production equipment according to claim 8, characterized in that: A third tension adjusting device is also provided between the second hot roller device and the winding device.

10. The membrane electrode production equipment according to claim 8, characterized in that: The membrane electrode production equipment also includes a cutting device for cutting the finished membrane electrode, and the cutting device is arranged between the second hot roller device and the winding device.

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