Gluing device and die cutting equipment

Abstract

A pole piece comprises a current collector and a pole lug, the edge area, close to the pole lug, of the current collector is a pasting area, the conveying direction of the pole piece is a first direction, and the rubberizing device comprises a heating module and a hot pressing module. The heating module comprises a heater, and the heater is used for heating the hot melt adhesive tape located in the pasting area; the heating module and the hot pressing module are sequentially arranged in the first direction. The hot pressing module comprises a first heating roller, a roller wheel and a first driving assembly, and the first driving assembly is used for driving the first heating roller and the roller wheel to get close to each other, so that the first heating roller and the roller wheel roll the pole piece and the hot melting adhesive tape located in the pasting area together; the first driving assembly is further used for driving the first heating roller and the roller to be away from each other. The rubberizing device provided by the utility model can be used for carrying out supplementary heating on the hot melt adhesive tape.

Description

Technical Field

[0001] This application relates to the field of battery electrode manufacturing technology, and in particular to an adhesive application device and a die-cutting equipment. Background Technology

[0002] Battery electrodes typically consist of a current collector, tabs, and active material. The active material is usually coated onto the surface of the current collector using a coating process. Tabs are formed on the initial electrode (a large metal foil coated with active material) using a die-cutting process. However, the die-cutting process can easily create burrs at the edges of the current collector, posing a risk of burrs piercing the separator and coming into contact with the electrode of opposite polarity, causing a short circuit.

[0003] To reduce the risk of short circuits, hot melt adhesive tape is applied to the edge area of ​​the current collector near the tab after die-cutting. The hot melt adhesive tape covers the burrs, thereby reducing the risk of the burrs piercing the diaphragm.

[0004] In related technologies, to attach hot melt adhesive tape to the electrode, a heater first heats the hot melt adhesive tape and then presses the hot melt adhesive tape onto the electrode. However, after the adhesive application device stops, some of the hot melt adhesive tape, although heated, has not yet been pressed. When the adhesive application device restarts, this part of the hot melt adhesive tape has cooled down, and subsequent pressing results in insufficient peel strength between this part of the hot melt adhesive tape and the electrode. Utility Model Content

[0005] Therefore, this application proposes an adhesive applicator capable of supplementally heating hot melt adhesive tape.

[0006] This application also proposes a die-cutting device having the above-mentioned adhesive applicator.

[0007] According to a first aspect embodiment of the present application, the adhesive applicator includes an electrode sheet comprising a current collector and an electrode tab, wherein the edge region of the current collector near the electrode tab is a bonding area, and the conveying direction of the electrode sheet is a first direction. The adhesive applicator includes:

[0008] A heating module includes a heater for heating hot melt adhesive tape located in the bonding area;

[0009] A hot pressing module, wherein the heating module and the hot pressing module are arranged sequentially along the first direction; the hot pressing module includes a first heating roller, a roller and a first driving assembly, wherein the first driving assembly is used to drive the first heating roller and the roller to move closer together, so that the first heating roller and the roller together roll the electrode sheet and the hot melt adhesive tape located in the pasting area; the first driving assembly is also used to drive the first heating roller and the roller to move away from each other.

[0010] The adhesive applicator according to the embodiments of this application has at least the following beneficial effects: by adding a hot pressing module after the heating module, the cooled hot melt adhesive tape and electrode sheet located behind the heating module can be heated and rolled, and the hot melt adhesive tape after the heating module can still be heated and pressed, thereby improving the yield of hot melt adhesive tape bonding.

[0011] According to some embodiments of this application, the hot-pressing module further includes:

[0012] A first temperature sensor is used to detect the temperature of the surface of the first heating roller.

[0013] According to some embodiments of this application, the heating module further includes:

[0014] The second temperature sensor is used to detect the temperature of the hot melt adhesive tape after it has been heated by the heater.

[0015] According to some embodiments of this application, the roller includes a second heating roller.

[0016] According to some embodiments of this application, the bonding areas located at both ends of the electrode sheet are respectively a first bonding area and a second bonding area. The hot pressing module is provided in two parts: one hot pressing module is used to heat the hot melt adhesive tape located in the first bonding area, and the other hot pressing module is used to heat the hot melt adhesive tape located in the second bonding area.

[0017] According to some embodiments of this application, the width direction of the electrode sheet is set as the second direction, the distance between the two first heating rollers along the second direction is adjustable, and the distance between the two rollers along the second direction is adjustable.

[0018] According to some embodiments of this application, the positions of the two first heating rollers along the second direction are adjustable, and the positions of the two rollers along the second direction are adjustable.

[0019] According to some embodiments of this application, a pressing module is further included, wherein the heating module, the pressing module, and the hot pressing module are arranged sequentially along the first direction, and the pressing module includes:

[0020] First pressure roller;

[0021] The second pressure roller is arranged in parallel with the first pressure roller, and a gap is provided between the second pressure roller and the first pressure roller for the electrode sheet and the hot melt adhesive tape to pass through.

[0022] The second driving assembly is used to drive the first pressure roller and the second pressure roller to move closer together, so that the first pressure roller and the second pressure roller together roll the electrode sheet, the hot melt adhesive tape in the first bonding area and the hot melt adhesive tape in the second bonding area; the second driving assembly is also used to drive the first pressure roller and the second pressure roller to move away from each other.

[0023] According to some embodiments of this application, the hot melt adhesive tape includes a first adhesive tape and a second adhesive tape, and the adhesive applicator further includes a tape-splitting module, the tape-splitting module comprising:

[0024] The base has a supporting surface;

[0025] A first clamping member is connected to the base. The first clamping member can be close to the support surface so that the first clamping member and the support surface clamp the first tape; the first clamping member can also be away from the support surface.

[0026] The second clamping member is connected to the base. The second clamping member can be close to the support surface so that the second clamping member and the support surface clamp the second tape; the second clamping member can also be away from the support surface.

[0027] A die-cutting apparatus according to a second aspect embodiment of this application includes:

[0028] The aforementioned adhesive applicator;

[0029] A die-cutting device for cutting an initial electrode sheet into several of the aforementioned electrode sheets.

[0030] The die-cutting equipment according to the embodiments of this application has at least the following beneficial effects: by using an adhesive applicator, the hot melt adhesive tape can be supplementally heated, which is beneficial to improving the production efficiency of electrode sheets.

[0031] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0032] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0033] Figure 1 This is a front view of the adhesive applicator according to an embodiment of this application;

[0034] Figure 2 This is the left view of the electrode.

[0035] Figure 3 This is a cross-sectional view of the electrode.

[0036] Figure 4 for Figure 1A three-dimensional view of the heating module of the adhesive applicator;

[0037] Figure 5 for Figure 1 A perspective view of some parts of the hot pressing module of the adhesive applicator;

[0038] Figure 6 for Figure 1 A magnified view of a portion of region I;

[0039] Figure 7 for Figure 1 A perspective view of the first pressure roller and the second drive assembly of the adhesive applicator;

[0040] Figure 8 for Figure 1 A perspective view of the second pressure roller of the adhesive applicator;

[0041] Figure 9 This is a schematic diagram of the first and second hot melt adhesive tapes;

[0042] Figure 10 for Figure 1 A perspective view of the tape-connecting module of the adhesive applicator;

[0043] Figure 11 This is a schematic diagram of a die-cutting device according to an embodiment of this application.

[0044] Reference numerals: electrode 110, current collector 111, tab 112, adhesive area 113, first adhesive area 114, second adhesive area 115, hot melt adhesive tape 120, first tape 121, second tape 122;

[0045] Heating module 200, heater 210, second temperature sensor 220;

[0046] Hot pressing module 300, first drive assembly 310, first heating roller 320, roller 330, second heating roller 331, first temperature sensor 340;

[0047] The pressing module 400, the second drive assembly 410, the first pressure roller 420, the second pressure roller 430, and the first temperature sensor 440 are included.

[0048] Pre-compression module 500;

[0049] The components include a tape module 600, a first clamping component 610, a base 620, a support surface 621, a through hole 622, a second clamping component 630, a spring 640, a guide post 650, an eccentric handle 660, and a connecting block 670.

[0050] Die-cutting device 700. Detailed Implementation

[0051] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0052] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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 orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0053] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number, and "above," "below," "within," etc., are understood to exclude the stated number. If "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0054] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0055] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] Reference Figures 1 to 4 It should be noted that, Figure 1 The straight dashed line represents the electrode 110, and the straight double-dotted line represents the hot melt adhesive tape 120. The electrode 110 includes a current collector 111 and a tab 112. The edge area of ​​the current collector 111 near the tab 112 is designated as the adhesive area 113 (the adhesive area 113 is part of the side surface 116 of the electrode 110). The conveying direction of the electrode 110 is designated as the first direction (refer to...). Figure 1(For example, the first direction is the upward direction). The adhesive applicator of the first aspect embodiment of this application includes a heating module 200 and a hot pressing module 300.

[0057] The heating module 200 includes a heater 210 for heating the hot melt adhesive tape 120 located in the bonding area 113. The heating module 200 and the hot pressing module 300 are arranged sequentially along a first direction. The hot pressing module 300 includes a first heating roller 320, a roller 330, and a first drive assembly 310. The first drive assembly 310 drives the first heating roller 320 and the roller 330 to move closer together, so that the first heating roller 320 and the roller 330 together roll and press the electrode 110 and the hot melt adhesive tape 120 located in the bonding area 113. The first drive assembly 310 also drives the first heating roller 320 and the roller 330 away from each other.

[0058] The adhesive applicator according to the embodiments of this application has at least the following beneficial effects: by adding a hot pressing module 300 after the heating module 200, the cooled hot melt adhesive tape 120 and electrode 110 located behind the heating module 200 can be heated and rolled, and the hot melt adhesive tape 120 after the heating module 200 can still be heated and pressed, thereby improving the yield of hot melt adhesive tape 120 bonding.

[0059] It should be noted that since the heater 210 requires a certain amount of time to heat up to the set temperature, the hot melt adhesive tape 120 and the electrode 110 being pulled along the first direction may not be heated sufficiently during this process. Before the heater 210 heats up to the set temperature, the hot pressing module 300 can also provide supplementary heating to the pulled hot melt adhesive tape 120 and the electrode 110, thereby improving the bonding quality of the hot melt adhesive tape 120.

[0060] Furthermore, when the heater 210 heats to the set temperature, the first drive assembly 310 can drive the first heating roller 320 and the roller 330 away from each other, without needing to supplement the heating of the hot melt adhesive tape 120 and the electrode 110.

[0061] Specifically, heater 210 can be one of electromagnetic heater, microwave heater, infrared heater, hot air heater and heating roller.

[0062] Specifically, the first heating roller 320 can be one of an electric heating roller, a water heating roller, a heat transfer oil heating roller, a steam heating roller, and an electromagnetic induction heating roller.

[0063] Specifically, the first driving component 310 drives the first heating roller 320 and the roller 330 to move closer to each other. This can be achieved by the first driving component 310 driving the first heating roller 320 to move, thereby bringing the first heating roller 320 closer to the roller 330; or by the first driving component 310 driving the roller 330 to move, thereby bringing the roller 330 closer to the first heating roller 320; or by the first driving component 310 driving the first heating roller 320 and the roller 330 to move together, thereby bringing the first heating roller 320 and the roller 330 closer to each other.

[0064] Specifically, the first drive assembly 310 includes one of the following: a cylinder, a linear motor, a hydraulic cylinder, a motor-driven rack and pinion mechanism, a motor-driven crank-slider mechanism, a motor-driven synchronous pulley and synchronous belt mechanism, and a motor-driven sprocket and chain mechanism. The heating roller 320 is rotatably connected to one mounting base (via a bearing), and the roller 330 is rotatably connected to another mounting base (via a bearing). The first drive assembly 310 drives at least one mounting base to move, thereby bringing the first heating roller 320 and the roller 330 closer together.

[0065] Reference Figure 5 In some embodiments of this application, the hot pressing module 300 further includes a first temperature sensor 340, which is used to detect the temperature of the surface of the first heating roller 320.

[0066] By setting the first temperature sensor 340, the surface temperature of the first heating roller 320 can be fed back in real time, which is conducive to closed-loop control of the surface temperature of the first heating roller 320. The surface temperature of the first heating roller 320 is more stable, and the heating consistency of the hot melt adhesive tape 120 is higher.

[0067] Specifically, for example, the first heating roller 320 is an electrically heated roller. The first temperature sensor 440 detects the temperature of the electrically heated roller and generates a feedback signal. Upon receiving the feedback signal, the controller (such as a programmable logic controller) compares the current temperature of the first heating roller 320 with the target temperature using a PID algorithm and generates an adjustment signal. Upon receiving the adjustment signal, the electrically heated roller adjusts its output power, thereby regulating its temperature, thus completing closed-loop temperature control.

[0068] Specifically, the first temperature sensor 340 can be one of an infrared temperature sensor, a thermocouple, and a thermistor.

[0069] Reference Figure 4 In some embodiments of this application, the heating module 200 further includes a second temperature sensor 220, which is used to detect the temperature of the hot melt adhesive tape 120 after it has been heated by the heater 210.

[0070] The temperature of the hot melt adhesive tape 120 after being heated by the heater 210 is detected by the second temperature sensor 220, and the temperature of the hot melt adhesive tape 120 after being heated by the heater 210 can be fed back in real time. This is conducive to achieving closed-loop control of the heating temperature of the heater 210, and the heating of the hot melt adhesive tape 120 by the heater 210 will be more stable.

[0071] Specifically, the second temperature sensor 220 can be one of an infrared temperature sensor, a thermocouple, and a thermistor.

[0072] Reference Figure 1 In the improved embodiment described above, the roller 330 includes a second heating roller 331.

[0073] After the roller 330 is set as the second heating roller 331, the first heating roller 320 and the second heating roller 331 together can heat both sides of the hot melt adhesive tape 120, the hot melt adhesive tape 120 is heated more evenly, the bonding area between the hot melt adhesive tape 120 and the tab 112 is larger, and the peel force after the hot melt adhesive tape 120 and the tab 112 are bonded is greater.

[0074] Specifically, the second heating roller 331 can be one of an electric heating roller, a water heating roller, a heat transfer oil heating roller, a steam heating roller, and an electromagnetic induction heating roller.

[0075] Reference Figure 3 In some embodiments of this application, the bonding areas 113 located at both ends of the electrode 110 are respectively the first bonding area 114 and the second bonding area 115. The hot pressing module 300 is provided in two parts: one hot pressing module 300 is used to heat the hot melt adhesive tape 120 located in the first bonding area 114, and the other hot pressing module 300 is used to heat the hot melt adhesive tape 120 located in the second bonding area 115.

[0076] By setting two hot pressing modules 300, the adhesive applicator can supplement the heating of the hot melt adhesive tape 120 at both ends of the electrode 110 at one time, making the adhesive applicator more efficient.

[0077] It should be noted that the front end of the electrode 110 typically has two first adhesive areas 114, and the rear end of the electrode 110 typically has two second adhesive areas 115. In this case, a hot-pressing module 300 can hot-press two hot melt adhesive tapes 120 at once.

[0078] Reference Figure 2 and Figure 5 In some embodiments of this application, the width direction of the electrode 110 is set as the second direction (refer to...). Figure 2 (For example, the second direction is the front-to-back direction), the distance between the two first heating rollers 320 along the second direction is adjustable, and the distance between the two rollers 330 along the second direction is adjustable.

[0079] By adjusting the distance between the two first heating rollers 320 and the two rollers 330 along the second direction, the hot pressing module 300 can be adapted to electrode sheets 110 of different widths, thereby making the adhesive applicator more compatible.

[0080] Reference Figure 2 and Figure 5 In the above embodiment, the positions of the two first heating rollers 320 along the second direction are adjustable, and the positions of the two rollers 330 along the second direction are adjustable.

[0081] At this time, the position of each first heating roller 320 can be adjusted, the position of each roller 330 can be adjusted, the adjustment of the hot pressing module 300 is more flexible, and the adhesive application device is more convenient to use.

[0082] Specifically, the individual first heating roller 320 can be moved by a screw and nut assembly in conjunction with a sliding assembly (slide rail and slider). The individual first heating roller 320 can also be positioned by one of the following mechanisms: a cylinder, a linear motor, a hydraulic cylinder, a motor-driven rack and pinion mechanism, a motor-driven crank-slider mechanism, a motor-driven synchronous pulley and belt mechanism, or a motor-driven sprocket and chain mechanism. The roller 330 operates similarly.

[0083] Reference Figure 1 , Figures 6 to 8 In some embodiments of this application, the adhesive applicator further includes a pressing module 400. The heating module 200, the pressing module 400, and the hot pressing module 300 are arranged sequentially along a first direction. The pressing module 400 includes a first pressure roller 420, a second pressure roller 430, and a second drive assembly 410. The second pressure roller 430 is arranged side by side with the first pressure roller 420, and a gap is provided between the second pressure roller 430 and the first pressure roller 420 for the electrode sheet 110 and the hot melt adhesive tape 120 to pass through.

[0084] The second drive assembly 410 is used to drive the first pressure roller 420 and the second pressure roller 430 to move closer together, so that the first pressure roller 420 and the second pressure roller 430 together roll the electrode sheet 110, the hot melt adhesive tape 120 in the first bonding area 114, and the hot melt adhesive tape 120 located in the second bonding area 115. The second drive assembly 410 is also used to drive the first pressure roller 420 and the second pressure roller 430 away from each other.

[0085] By having the first pressure roller 420 and the second pressure roller 430 roll together to press the electrode 110, the hot melt adhesive tape 120 in the first bonding area 114 and the hot melt adhesive tape 120 in the second bonding area 115, the pressing module 400 can complete the pressing of all the hot melt adhesive tapes 120 on the electrode 110 in one go, and the pressing degree of all the hot melt adhesive tapes 120 on the electrode 110 is relatively consistent.

[0086] Specifically, the second drive assembly 410 includes one of the following: a cylinder, a linear motor, a hydraulic cylinder, a motor-driven rack and pinion mechanism, a motor-driven crank-slider mechanism, a motor-driven synchronous pulley and synchronous belt mechanism, and a motor-driven sprocket and chain mechanism.

[0087] Reference Figure 1 It should be noted that the adhesive application device typically also includes a pre-pressing module 500, and the pre-pressing module 500 and the heating module 200 are arranged sequentially along the first direction. The structure and function of the pre-pressing module 500 are the same as those of the pressing module 400, and will not be described again here.

[0088] Reference Figure 9 and Figure 10 In some embodiments of this application, the hot melt adhesive tape 120 includes a first tape 121 and a second tape 122, and the tape application device further includes a tape-connecting module 600, which includes a base 620, a first clamping member 610, and a second clamping member 630. The base 620 is provided with a support surface 621.

[0089] The first clamping member 610 is connected to the base 620. The first clamping member 610 can be close to the support surface 621 so that the first clamping member 610 and the support surface 621 clamp the first adhesive tape 121. The first clamping member 610 can also be away from the support surface 621.

[0090] The second clamping member 630 is connected to the base 620. The second clamping member 630 can be close to the support surface 621 so that the second clamping member 630 and the support surface 621 clamp the second adhesive tape 122. The second clamping member 630 can also be away from the support surface 621.

[0091] It should be noted that when a roll of hot melt adhesive tape 120 is used up, the previous roll of hot melt adhesive tape 120 needs to be connected to the next roll of hot melt adhesive tape 120 to achieve continuous supply of hot melt adhesive tape 120.

[0092] By setting the tape-connecting module 600, the first tape 121 and the second tape 122 can be pressed down simultaneously, thereby facilitating the connection of the first tape 121 and the second tape 122.

[0093] Specifically, the connection structure between the second clamping member 630 and the base 620 is described below. The connection structure between the first clamping member 610 and the base 620 is similar.

[0094] The connecting module 600 also includes a spring 640, a guide post 650, an eccentric handle 660, and a connecting block 670. The base 620 has a through hole 622, in which the guide post 650 is inserted and passes through the spring 640. One end of the guide post 650 is fixedly connected to the second clamping member 630, and the other end is fixedly connected to the connecting block 670. Both ends of the spring 640 abut against the second clamping member 630 and the base 620 respectively, and the spring 640 is in a compressed state. The eccentric handle 660 is rotatably connected to the connecting block 670, and the outer circumferential surface of the eccentric wheel of the eccentric handle 660 abuts against the base 620.

[0095] Therefore, by rotating the eccentric handle 660 in the forward direction, the distance between the rotation center of the eccentric wheel and the base 620 will decrease, thereby allowing the spring 640 to drive the second clamping member 630 closer to the support surface 621. By rotating the eccentric handle 660 in the reverse direction, the distance between the rotation center of the eccentric wheel and the base 620 will increase, thereby allowing the eccentric handle 660 to lift the second clamping member 630 away from the support surface 621.

[0096] In another embodiment, the first clamping member 610 may be threadedly connected to the base 620, thereby allowing the first clamping member 610 to move closer to or further away from the support surface 621. The second clamping member 630 is handled similarly.

[0097] Reference Figure 11 According to a second aspect of this application, a die-cutting apparatus includes an adhesive applicator and a die-cutting apparatus 700, the die-cutting apparatus 700 being used to cut an initial electrode sheet 110 into a plurality of electrode sheets 110.

[0098] The die-cutting equipment according to the embodiments of this application has at least the following beneficial effects: by using the adhesive applicator, the hot melt adhesive tape 120 can be supplementally heated, which is beneficial to improving the production efficiency of the electrode sheet 110.

[0099] Specifically, the die-cutting equipment can be laser die-cutting equipment or metal die-cutting equipment.

[0100] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. A taping device, characterized by comprising The pole piece includes a current collector and a tab, an edge region of the current collector close to the tab is a sticking zone, a conveying direction of the pole piece is a first direction, and the sticking device includes: A heating module including a heater configured to heat the hot melt adhesive tape located at the sticking zone; A hot-pressing module, the heating module and the hot-pressing module are sequentially arranged along the first direction; the hot-pressing module includes a first heating roller, a roller and a first driving assembly, the first driving assembly is configured to drive the first heating roller and the roller to approach each other, so that the first heating roller and the roller roll together to press the pole piece and the hot melt adhesive tape located at the sticking zone; the first driving assembly is also configured to drive the first heating roller and the roller to move away from each other.

2. The taping device of claim 1, wherein The hot-pressing module further includes: A first temperature sensor configured to detect the temperature of the surface of the first heating roller.

3. The taping device of claim 1, wherein, The heating module further includes: A second temperature sensor configured to detect the temperature of the hot melt adhesive tape after being heated by the heater.

4. The taping device of claim 1, wherein The roller includes a second heating roller.

5. The taping device of any one of claims 1 to 4, wherein the tape is provided in a roll. The sticking zones located at both ends of the pole piece are respectively a first sticking zone and a second sticking zone, and the hot-pressing module is provided with two, one of which is configured to heat the hot melt adhesive tape located at the first sticking zone, and the other of which is configured to heat the hot melt adhesive tape located at the second sticking zone.

6. The taping device of claim 5, wherein, The width direction of the pole piece is a second direction, the distance between the two first heating rollers along the second direction is adjustable, and the distance between the two rollers along the second direction is adjustable.

7. The taping device of claim 6, wherein, The positions of the two first heating rollers along the second direction are adjustable, and the positions of the two rollers along the second direction are adjustable.

8. The taping device of claim 5, wherein, Further comprising a pressing module, the heating module, the pressing module and the hot-pressing module are sequentially arranged along the first direction, and the pressing module includes: A first pressing roller; A second pressing roller arranged side by side with the first pressing roller, and a gap is provided between the first pressing roller and the second pressing roller, the gap is configured to pass the pole piece and the hot melt adhesive tape; A second driving assembly configured to drive the first pressing roller and the second pressing roller to approach each other, so that the first pressing roller and the second pressing roller roll together to press the pole piece, the hot melt adhesive tape of the first sticking zone and the hot melt adhesive tape located at the second sticking zone; the second driving assembly is also configured to drive the first pressing roller and the second pressing roller to move away from each other.

9. The taping device of any one of claims 1 to 4, wherein, The hot melt adhesive tape includes a first adhesive tape and a second adhesive tape, and the sticking device further includes a tape connecting module, the tape connecting module includes: A base provided with a support surface; A first pressing member connected with the base, the first pressing member can approach the support surface, so that the first pressing member and the support surface clamp the first adhesive tape; the first pressing member can also move away from the support surface; A second pressing member connected with the base, the second pressing member can approach the support surface, so that the second pressing member and the support surface clamp the second adhesive tape; the second pressing member can also move away from the support surface.

10. A die-cutting apparatus characterized by, The sticking device of any one of claims 1 to 9; ​ A die-cutting device for cutting an initial pole piece into a number of said pole pieces.

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