CN219850540U

CN219850540U - Heating device

Info

Publication number: CN219850540U
Application number: CN202321180667.5U
Authority: CN
Inventors: 郭亚银; 代航
Original assignee: Sany Technology Equipment Co Ltd
Current assignee: Sany Technology Equipment Co Ltd
Priority date: 2023-05-16
Filing date: 2023-05-16
Publication date: 2023-10-20
Anticipated expiration: 2033-05-16

Abstract

The utility model relates to the technical field of battery manufacturing, and particularly provides a heating device. The heating device includes: the oven is provided with a material belt inlet and a material belt outlet; a material belt conveying mechanism for conveying the material belt so as to enable the material belt to pass through the oven; the laser system comprises a laser and a beam shaping module, and can adjust the output laser spots so that a single laser spot can cover a target heating area in the direction of the width of the material band, and the coating area and the tab area can be respectively irradiated through different laser spots. According to the heating device provided by the utility model, the laser system is used for heating the material belt, the heating speed is high, the heating efficiency is high, the laser is used for heating the material belt, the uniform heating degree of the coating area can be improved, the coating area and the tab area can be heated in a partitioning mode, the heating device is convenient to use and excellent in heating performance, the phenomena of tab damage, uneven heating of the coating area, curling and creasing of the material belt and the like are avoided, and the yield of the material belt is improved.

Description

Heating device

Technical Field

The utility model relates to the technical field of battery manufacturing, in particular to a heating device.

Background

In the manufacturing process of the battery pole piece, after paste-shaped active substances are coated on a material belt, the material belt is heated to dry a solvent of the coating layer, and then the material belt is manufactured into the battery pole piece with required specification. The conventional heating methods are steam heating, electric heating, infrared heating and the like. When the material is heated to the specified temperature, a certain time is required to pass, and the drying efficiency of the material belt is affected. The heat of the heat source is unevenly distributed, so that the material belt is easily heated unevenly, and the drying quality of the coating layer is affected; meanwhile, the material belt is divided into a coating area coated with an active material coating and a tab area not coated with an active material, the two areas are different in heat resistance, and phenomena such as tab damage, material belt curling and creasing are easy to occur if the two areas are heated in the same temperature range, so that the yield of the material belt is reduced.

Disclosure of Invention

In view of the above, embodiments of the present utility model are directed to providing a heating device, which heats a material belt by using laser, so that not only can the degree of uniform heating of a coating region be improved, but also the coating region and a tab region can be heated by dividing the temperature, thereby solving the problem of reduced yield of the material belt caused by the above phenomenon in the prior art.

The utility model provides a heating device for heating a material belt to be manufactured into a material belt, wherein the material belt is divided into a coating area and a tab area in the width direction, and the heating device comprises:

the oven is provided with a material belt inlet and a material belt outlet;

a material belt conveying mechanism for conveying the material belt so as to enable the material belt to pass through the oven;

the laser system comprises a laser and a beam shaping module, and can adjust the output laser spots so that a single laser spot can cover a target heating area in the direction of the width of the material band, and the coating area and the tab area can be respectively irradiated through different laser spots.

In one possible embodiment, the laser system comprises a first laser system for heating the application region and a second laser system for heating at least the tab region of the material web.

In one possible embodiment, the irradiation field of the first laser system and the irradiation field of the second laser system are arranged in the conveying direction of the material web, so that the material web passes through the irradiation fields of the first laser system and the second laser system in sequence; and/or, the first laser system and the second laser system each comprise a semiconductor laser.

In a possible implementation manner, the beam shaping module comprises a light homogenizing device, wherein the light homogenizing device is configured to uniformly irradiate an irradiation area with laser light emitted by a laser of the laser system; and/or, the laser system also comprises a temperature regulating device, wherein the temperature regulating device measures and regulates the temperature of each irradiation area of the laser system.

In one possible embodiment, the beam shaping module includes a scanning galvanometer to adjust the size, position, and laser energy of the laser system laser output port.

In one possible embodiment, the laser system is disposed outside the oven, and a light-transmitting area for laser light to transmit is disposed on the oven.

In one possible implementation manner, the beam shaping module of the second laser system further includes a beam splitting device, where the beam splitting device is configured to split the laser beam of the second laser into a first laser spot that irradiates the material strip coating area and a second laser spot that irradiates the material strip tab area, and can adjust energy of the first laser spot and the second laser spot so that irradiation temperatures of the material strip coating area and the material strip tab area are different.

In one possible embodiment, the device further comprises a rolling mechanism for rolling the material belt.

In one possible embodiment, the rolling mechanism comprises: at least one group of driving rollers which are driven by a power device to rotate, roll and convey the material belt; at least one group of supporting rollers are rotatably connected in the oven, roll and support the material belt, and form the material belt conveying mechanism with the driving roller.

In one possible embodiment, the rollers of the roll press mechanism are provided with a tab roll nip and a coating roll nip in the axial direction, the tab roll nip being provided with a projection higher than the coating roll nip so that the surface of the projection is in contact with the surface of the tab zone.

According to the heating device provided by the utility model, the laser system is used for heating the material belt, the heating speed is high, the heating efficiency is high, and the irradiation condition of the material belt can be regulated. On the one hand, the position and the size of the laser light spot can be adjusted through the beam shaping module, and an irradiation area can be formed through a single laser light spot to irradiate a target heating area of the material belt, such as a coating area, so that uneven heating temperature of the coating area is prevented, and uniform heating degree is improved; on the other hand, through the setting of the number of laser instrument or through beam shaping module, can form a plurality of laser faculae, and form different irradiation zone, carry out the separate heating of subregion partition temperature through the coating district and the utmost point ear district of different irradiation zone to the material area, match each suitable heating demand, prevent to appear utmost point ear damage. Therefore, the whole heating device is convenient to use and excellent in heating performance, and solves the problems of tab damage, uneven heating of a coating area, curling and creasing of a material belt and the like, and improves the yield of the material belt.

Drawings

FIG. 1 is a schematic diagram showing the composition of a heating device according to an embodiment of the present utility model;

FIG. 2 is a schematic view illustrating the irradiation of a first laser to a material strip according to an embodiment of the present utility model;

FIG. 3 is a schematic view illustrating the irradiation of a first laser to a material strip according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a roller according to an embodiment of the present utility model;

in fig. 1-4:

1. a first laser system; 11. a first laser; 12. a first shaping module; 13. a first light homogenizing device; 2. a second laser system; 21. a second laser; 22. a second shaping module; 23. a second light homogenizing device; 3. an oven; 4. a material belt; 401. a tab region; 402. a coating zone; 5. a rolling mechanism; 51. a driving roller; 52. a support roller; 501. a roller main body; 502. a projection.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, a heating device is provided for heating and baking a material web 4 according to an embodiment of the present utility model. The heating device comprises an oven 3, a material belt conveying mechanism and a laser system, wherein the oven 3 is of a box body or cover body structure, a heating environment isolated from the outside is provided, and an inlet through which a material belt 4 penetrates and an outlet through which the material belt 4 penetrates are arranged on the oven 3. The material belt 4 passes through the oven 3 under the conveying of the material belt conveying mechanism. The laser system is arranged in the oven 3 or outside the oven 3, and irradiates the material belt 4 in the oven 3 to heat and bake the material belt 4. The web 4 may be a web for forming a battery pole piece having a coated region coated with an active material and a tab region not coated with an active material thereon. Meanwhile, in the utility model, the laser system comprises a laser and a beam shaping module, and the beam shaping module adjusts the laser emitted by the laser to irradiate the material belt 4 after the laser is adjusted. The beam shaping module generally includes a plurality of mirrors (such as a reflector, a beam splitter, a focusing mirror, a collimating mirror, etc., which are used according to requirements) and a moving mechanism for adjusting the positions or angles of the mirrors, so as to adjust parameters of laser spots output after the laser passes through the beam shaping module, such as the number, positions, sizes and energy densities of the laser spots (for example, a change in the size of the laser spots may result in a change in the energy densities of the spots). For example, when the beam shaping module includes a scanning galvanometer, the beam shaping module can adjust the position, the size, the energy, and the like of the laser spot by adjusting the position and the angle of the galvanometer; when the beam shaping module comprises a spectroscope, the beam shaping module can also adjust the number of the output laser spots. Of course, the number and positions of the laser spots to be output can be adjusted by setting the number and positions of the lasers. That is, the laser system can adjust parameters such as the number, position, size, temperature (irradiation temperature which can be reached by changing the energy of the laser spot) and the like of the formed irradiation area (irradiation of the laser spot to the object, that is, forming the irradiation area) by adjusting the number, position, size, energy and the like of the output laser spots, so that the irradiation heating condition of the laser to the material belt 4 can be adjusted.

Therefore, on the one hand, by the beam shaping module, the target heating area such as the coating area 402 can be covered in the width direction of the web 4 by one laser spot that is outputted (for example, the dimension of the laser spot in the web width direction is made to coincide with the dimension of the web coating area 402 in the width direction), that is, by forming one irradiation area capable of irradiating the area to be heated by a single laser spot, the area to be heated such as the coating area 402 is uniformly irradiated, the problem of uneven irradiation temperature formed by a plurality of arranged laser spots is avoided, uneven heating temperature of the coating area is prevented, and the heating temperature uniformity of the heating area is improved; on the other hand, through the beam shaping module's beam splitting function, perhaps set up a plurality of (two or more) lasers, can export a plurality of laser faculae, can form different irradiation areas, so, can carry out the separate heating of subregion partition temperature to the coating district 402 and the tab district 401 of material area through different irradiation areas, match the suitable heating temperature in different material areas, prevent that tab district from overheated and appearing the tab damage.

Therefore, the heating device provided by the utility model is convenient to use and excellent in heating performance, solves the problems of tab damage, uneven heating of a coating area, curling and creasing of a material belt and the like, and improves the yield of the material belt.

The laser system also comprises a controller which is in communication connection with the laser and the power part of the moving mechanism in the beam shaping module so as to adjust the irradiation parameters according to the requirements.

In some embodiments, the laser system is provided with at least two, for example comprising a first laser system 1 and a second laser system 2. The first laser system 1 and the second laser system 2 each comprise a laser and a beam shaping module, the first laser system 1 comprising a first laser 11 and a first shaping module 12, and the second laser system 2 comprising a second laser 21 and a second shaping module 22. The controller of the first laser system 1 and the controller of the second laser system 2 may be two independent controllers, may be two controllers connected by communication, or may share one controller.

The first laser system 1 is used to heat the coating area 402 of the material strip 4, the second laser system 2 is used to heat at least the tab area 401 of the material strip 4, or the second laser system 2 is used to heat the coating area 402 and the tab area 401. That is, the laser spot emitted from the first laser system 1 irradiates only the coating region 402 of the material tape 4, and the laser spot emitted from the second laser system 2 irradiates at least the tab region 401 of the material tape 4, either by irradiating the tab region 401 alone or by irradiating both the coating region 402 and the tab region 401.

In this way, the method is very convenient for realizing the partitioned temperature heating of the tab area and the coating area, and parameters of the first laser system 1 and the second laser system 2 such as the size, the position and the irradiation temperature of the irradiation area can be independently adjusted, so that different heating temperatures can be conveniently set, for example, the energy of a laser spot of the first laser system 1 is higher (the energy density of the spot is increased or the power of a laser is adjusted), the heating temperature is higher, the material belt coating area 402 is quickly dried, the energy of a laser spot of the second laser system 2 is lower, the heating temperature is lower, the tab area 401, or the tab area 401 and the coating area 402 are gently heated, the tab is not damaged, and the baking is finished at a proper temperature; the size of the tab irradiation area (laser light spot irradiating the tab area) and the size of the coating irradiation area (laser light spot irradiating the coating area) are also convenient to independently set, and the material belt requirements of different specifications are matched.

Of course, in other embodiments, only one laser system may be provided, and the beam shaping module divides the light source of the same laser into at least two laser spots to form at least two irradiation areas (in this embodiment, the beam shaping module includes a beam splitting device, for example, a beam splitting galvanometer, with a beam splitting function), where one irradiation area is only used to cover the coating area 402 in the width direction of the material band, and the other irradiation area covers only the tab area 401 in the width direction of the material band, or covers both the coating area 402 and the tab area 401.

In a preferred embodiment, the first laser system 1 and the second laser system 2 are arranged in the direction of conveyance of the material web 4, for example, the first laser system 1 is in front and the second laser system 2 is in back. When the material belt 4 moves, each section firstly passes through the irradiation area of the first laser system 1, is baked by the first laser system 1, then passes through the irradiation area of the second laser system 2, is baked by the second laser system 2, and finally passes through the oven 3. In this embodiment, the irradiation field of the first laser system 1 and the irradiation field of the second laser system 2 are also arranged in the conveying direction of the material web 4, in different sections of the oven 3. For example, the irradiation area of the first laser system 1, which is called the first irradiation area, is located at a section of the oven 3 near the entrance of the web 4, and covers an area corresponding to the web coating area 402 in the oven 3 in the other direction (the width direction of the web 4). The irradiation zone of the second laser system 2, referred to as the second irradiation zone, is located at another section of the oven 3 between the first irradiation zone and the exit of the web 4 and covers the area of the oven 3 corresponding to the web tab area 401 or the two areas of the web tab area 401 and the coating area 402 in the width direction of the web 4 (typically also the width direction of the oven 3).

When the second laser system 2 is used only for heating the tab region 401, it may be arranged in the width direction of the material tape 4 with the first laser system 1.

The material tape 4 may be coated on one surface or both surfaces when heated in the oven 3.

The laser system may be disposed on one side of the oven 3, and heat from one side of the material tape 4, or may be disposed with two groups of laser systems distributed on both sides of the material tape 4 in the thickness direction, and heat both sides of the material tape 4.

The laser in the utility model adopts a continuous laser or a pulse laser with the wavelength range of 200-11000nm, such as a semiconductor laser, a solid-state laser and a fiber laser. Preferably, the utility model adopts a semiconductor laser with wave bands from ultraviolet to blue light, the wavelength range is 300nm-11000nm, and the output power is 5W-1000W.

The beam shaping module comprises a scanning galvanometer, and the scanning galvanometer can adjust the size and the position of a laser output port (a light outlet for forming a laser spot) of the laser system and the laser energy of transmitted laser, namely, the position, the size and the spot energy of the laser spot output by the laser system.

For example, the first shaping module 12 includes a first scanning galvanometer, the laser light emitted by the first laser 11 passes through the first scanning galvanometer and is transmitted from a laser output port on the first scanning galvanometer to irradiate the material belt 4, and the second shaping module 22 includes a second scanning galvanometer, the laser light emitted by the second laser 21 passes through the second scanning galvanometer and is transmitted from a laser output port of the first scanning galvanometer to irradiate the material belt 4. The first scanning galvanometer and the second scanning galvanometer can adjust parameters such as the position of a laser output port, the size of an outlet, the energy of output laser and the like.

In some embodiments, the beam shaping module includes a scanning galvanometer and a beam splitting device, so that the beam shaping module can adjust the number, position, and size of the laser output ports, and the energy of each laser output port, which can also be said to be the energy of the output laser.

By the arrangement, the targeted laser distribution adjustment can be carried out according to the coating conditions of the material belt 4, such as coating thickness, different coating areas 402 and the like, so as to adjust the baking temperature of the baking area and different areas; the position of the irradiation area can be changed by adjusting the position of the laser output ports, the size of the irradiation area, namely the baking area, can be changed by adjusting the number and the size of the laser output ports, the laser energy of the baking area can be distributed by adjusting the laser energy of the laser output ports, and the baking temperature of the baking area can be adjusted.

In some embodiments, the beam shaping module further comprises a light homogenizing device, and the light homogenizing device is configured to uniformly irradiate the irradiation area with the laser emitted by the laser system. For example, the first laser system 1 comprises a first light homogenizing device 13 and the second laser system 2 comprises a second light homogenizing device 23. The first light uniformizing device 13 performs light uniformizing on the laser light of the first laser 11 to uniformly irradiate the coating area 402 of the material tape 4, and as shown in fig. 2 and 3, the second light uniformizing device 23 performs light uniformizing on the laser light of the first laser 11 to uniformly irradiate the coating area 402 of the material tape 4 and the tab area 401. By means of the light homogenizing device, both the laser of the first laser system 1 and the laser of the second laser system 2 can heat the material web 4 uniformly.

The first light homogenizing device 13 and the second light homogenizing device 23 are laser spot homogenizing devices, and belong to a light homogenizing system, and include components such as a light homogenizing sheet, a reflecting mirror, a focusing mirror, a light homogenizing block provided with a light homogenizing hole or a plurality of light emitting paths, and the like. Therefore, the first focusing lens, the collimation beam expander, the optical filter, the second focusing lens, the light homogenizing pipe and the like are sequentially arranged on the light source light path, and the device has various implementation modes and various structural specifications in the prior art, and is not particularly limited herein.

Of course, the beam shaping module may also be composed of other optical devices with light output position and size adjusting function, for example, multiple shaping light blocks with light emitting paths set up in a moving way are provided on each shaping light block, the light emitting paths on different shaping light blocks have different specifications, the light source of one laser can be divided into multiple beams of light by adjusting the number of shaping light blocks used to form multiple laser spots, multiple irradiation areas are formed, the light emitting paths passed by the light source are switched by adjusting the specifications of the shaping light blocks used to form different laser spots, and the position, size and temperature of the irradiation area are adjusted.

The beam shaping module can be a combination of a light path device with a beam splitting function, a light path device with a light spot position and size adjusting function and a light path device with a light homogenizing function, and has the function of adjusting the number, position, size and energy of laser spots, so that the number, position, size and spot energy of the actual light spot transmission of laser emitted by a single laser or the same light source can be adjusted. The light path device with the light splitting function, the light path device with the light spot position and size adjusting function and the light path device with the light homogenizing function are all formed by one or more required light mirrors (such as a collimating mirror, a spectroscope, a focusing mirror, a lens and the like) according to actual parameter requirements, and are not specifically limited herein or repeated.

In some embodiments, the irradiated area of the second laser system 2, i.e., the second irradiated area, covers the tape-coating area 402 and the tab area 401. In this way, the material strip 4 is conveyed to pass through the irradiation area of the first laser system 1 to heat the coating area 402, and then passes through the irradiation area of the second laser system 2 to heat the tab area 401 and the coating area 402 simultaneously.

Further, the second irradiation region has two types of regions, and the heating temperatures of the tab region 401 and the coating region 402 are made different by the two groups of regions respectively irradiating the tab region 401 and the coating region 402. In this embodiment, the beam shaping module of the second laser system 2, that is, the second shaping module 22 includes a beam splitting device, which can adjust the distribution of the laser beam emitted by the second laser 21. For example, the laser light emitted from the second laser 21 is divided into a first laser spot irradiating the material tape application region 402 and a second laser spot irradiating the material tape tab region 401, and the energy of the first laser spot and the energy of the second laser spot can be adjusted so that the irradiation temperatures of the material tape application region 402 and the material tape tab region 401 are different.

The light splitting device is provided with a rotatable light splitting part (such as a spectroscope) and a power part such as a motor for driving the light splitting part to move, and the controller is electrically connected with the power part. The beam splitting device includes at least one beam splitter (may be further provided with other optical lenses such as a focusing lens), for example, a beam splitting galvanometer (including a beam splitter and a motor for driving the beam splitter to rotate), and divides the original beam of the second laser 21 into two groups of light spots, namely, a first laser spot and a second laser spot (the number of the first laser spots and the number of the second laser spots are determined according to the distribution situation of the tab area and the coating area on the material belt). By adjusting the angle of the beam splitter, the beam energy of the first laser spot and the second laser spot (i.e. the dividing ratio of the original beam) can be adjusted, for example, the energy of the first laser spot is more, and the energy of the second laser spot is less, so that the irradiation temperature of the first laser spot, that is, the heating temperature of the material strip coating area 402, can be higher than the irradiation temperature of the second laser spot, that is, the heating temperature of the tab area 401.

The light splitting device can also be a light splitting block with a movable setting, the light splitting block is provided with a plurality of light emitting paths, one beam of light can be split into a plurality of beams of light to form a plurality of laser spots, a plurality of irradiation subareas are formed, and the separation proportion of laser can be adjusted by moving the position of the light splitting block, so that the heating temperatures of different irradiation subareas are adjusted.

In some embodiments, the heating device further includes a temperature control device, where the temperature control device includes at least a non-contact thermo detector and a controller, and the controller in communication with the non-contact thermo detector may be a controller of the laser system or may be a controller that is independently set. The controller is communicatively connected to the non-contact thermometer and to the first laser 11 and the second laser 21. The non-contact thermometer is provided with at least two groups, one group is used for measuring the temperature of the first irradiation area, and the other group is used for measuring the temperature of the second irradiation area. The controller regulates and controls the power of the first laser 11 and the second laser 21 through the feedback of the non-contact type thermometer, thereby regulating the baking temperature of the material belt 4 by the first irradiation area and the second irradiation area. By the arrangement, the baking temperature of the material belt 4 can be accurately regulated and controlled, or the constant-temperature baking effect can be maintained.

When the second laser system 2 is provided with a spectroscopic device, the non-contact thermo detector of the second irradiation area is provided with at least two groups, one group is used for measuring the temperature corresponding to the material tape tab area 401 in the second irradiation area, that is, measuring the baking temperature of the second laser beam, and the other group is used for measuring the temperature corresponding to the material tape coating area 402 in the second irradiation area, that is, measuring the baking temperature of the first laser beam. The controller starts the power part of the light splitting device according to the feedback of the two groups of non-contact thermometers so as to adjust the angle of the light splitting part.

In a preferred embodiment, the laser system is arranged outside the oven 3, a light transmission area for laser transmission is arranged on the wall of the oven 3, the light transmission area can be of a hollow structure, and light transmission materials such as glass, plastic and the like can be arranged, so that a transparent partition plate is formed, and the thickness can be 2-100mm. The laser system is arranged outside the oven 3 and is separated from the oven 3, and the laser system can adjust the size of the laser irradiation area to match the ovens 3 with different specifications and the baking requirements of different material belts 4.

Meanwhile, a transparent baffle plate can be paved at the laser output port of the laser system to prevent the laser output port from being polluted by moisture or dust. The transparent barrier may have a thickness of 2-100mm.

Both ends of the oven 3 are provided with ventilation openings for discharging the solvent generated in the oven when the material tape 4 is dried. The solvent is discharged through the vent hole by blowing or sucking, or both. The ventilation opening can be provided with a suction negative pressure device and/or an air supply device.

In some embodiments, as shown in fig. 1, the heating device is further provided with a rolling mechanism, and the rolling mechanism is arranged in the oven 3 to roll the material belt 4. The first laser system 1, the second laser system 2 and the roll-in mechanism may be arranged in order along the conveying direction of the material web 4. The rolling mechanism comprises at least one set of rollers, wherein one set of rollers is formed by at least two rollers which are arranged oppositely, the material belt 4 passes through a gap between the rollers which are arranged oppositely, and the rollers rotate to roll the material belt 4. The roller is adopted to roll the pole piece after the drying process or heating, so that active substance particles of the coating layer uniformly flow in the water evaporation process, gaps are filled, uniformity and flatness of the coating layer of the material belt 4 are guaranteed, compactness of the coating layer is improved, the coating layer is shaped, and quality of the material belt 4 is improved.

In some embodiments, the rolling mechanism comprises at least one group of driving rollers and at least one group of supporting rollers, the driving rollers are driven by a power device to rotate, roll and convey the material belt 4; the support roller is rotatably connected in the oven 3, rolls and supports the material strip 4. In this way, the material tape 4 is moved by the roller drive (friction drive) that actively rotates, and it is unnecessary to provide another material tape conveying mechanism. The material belt 4 can be stably supported by the two groups of rollers, namely the supporting roller and the driving roller, so the driving roller and the supporting roller form the material belt conveying mechanism, the rolling mechanism also has a conveying function, and the heating device can convey and roll the material belt 4 only by arranging the rolling mechanism without arranging other conveying mechanisms additionally.

In some embodiments, as shown in fig. 4, the roller of the roll press mechanism is provided with a tab roll nip and a coating roll nip in the axial direction, the tab roll nip being provided with a protrusion 502 protruding from the roller body 501 such that the tab roll nip is higher than the coating roll nip. It can also be said that the diameter of the tab roll nip is larger than the diameter of the applicator roll nip. The coating roll nip is formed by a section of the roll body 501 and the protrusions 502 may be formed of a hard material surrounding the surface of the roll body 501. The tab roll nip is provided with a protrusion 502, the thickness of the protrusion 502 being set according to the coating thickness of the strip coating zone 402, so that the surface of the protrusion can always be in contact with the surface of the tab zone during the roll process. Thus, when the material belt 4 is rolled, the coating area can be compacted, the tab area 401 can be rolled, the tab area is flattened, and tab folds or edge tilting are effectively prevented.

The basic principles of the present utility model have been described above in connection with specific embodiments, however, it should be noted that the advantages, benefits, effects, etc. mentioned in the present utility model are merely examples and not intended to be limiting, and these advantages, benefits, effects, etc. are not to be considered as essential to the various embodiments of the present utility model. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the utility model is not necessarily limited to practice with the above described specific details.

The components, arrangements, etc. referred to in this disclosure are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the drawings. These components, devices, may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.

It should also be noted that in the apparatus, device of the present utility model, the components may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present utility model.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the utility model. Thus, the present utility model is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the utility model to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is to be construed as including any modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. A heating apparatus for heating a web to be formed into a web, the web being divided into a coating region and a tab region in a width direction, the heating apparatus comprising:

the oven is provided with a material belt inlet and a material belt outlet;

2. The heating device of claim 1, wherein the laser system comprises a first laser system for heating the coating region and a second laser system for heating at least the tab region of the web.

3. The heating apparatus of claim 2, wherein the irradiation zone of the first laser system and the irradiation zone of the second laser system are arranged in a direction of conveyance of the web such that the web passes through the irradiation zones of the first laser system and the second laser system in sequence;

and/or, the first laser system and the second laser system each comprise a semiconductor laser.

4. The heating apparatus of claim 1, wherein the beam shaping module comprises a light homogenizing device configured to uniformly irradiate an irradiation area with laser light emitted from a laser of the laser system;

and/or, the laser system also comprises a temperature regulating device, wherein the temperature regulating device measures and regulates the temperature of each irradiation area of the laser system.

5. The heating device of claim 1, wherein the beam shaping module comprises a scanning galvanometer to adjust the size, position, and laser energy of the laser system laser output port.

6. The heating device of claim 1, wherein the laser system is disposed outside the oven, and a light-transmitting region for transmitting laser light is disposed on the oven.

7. The heating apparatus of claim 2, wherein the beam shaping module of the second laser system further comprises a beam splitting device configured to split the laser beam of the second laser system into a first laser spot illuminating the web coating area and a second laser spot illuminating the web tab area, and to adjust the energy of the first laser spot and the second laser spot to cause the web coating area and the web tab area to be illuminated at different temperatures.

8. The heating device of claim 1, further comprising a roll-in mechanism for roll-in the web.

9. The heating device of claim 8, wherein the roll-in mechanism comprises:

at least one group of driving rollers which are driven by a power device to rotate, roll and convey the material belt;

at least one group of supporting rollers are rotatably connected in the oven, roll and support the material belt, and form the material belt conveying mechanism with the driving roller.

10. The heating device according to claim 8, wherein the roller of the roll pressing mechanism is provided with a tab roll nip and a coating roll nip in an axial direction, the tab roll nip being provided with a projection higher than the coating roll nip so that a surface of the projection is in contact with a surface of the tab zone.