Coating device for preparing battery and manufacturing equipment of battery

Abstract

The utility model provides a coating device for preparing a battery and manufacturing equipment of the battery, and belongs to the technical field of batteries. The coating device comprises a base assembly, a coating head, a moving assembly and an eddy current heating assembly, the base assembly comprises a supporting platform, and the supporting platform is used for bearing a substrate with a conductive layer; the coating head is used for coating the substrate with a coating; the moving assembly is connected with at least one of the supporting platform and the coating head, so that the supporting platform and the coating head can move relatively; the eddy current heating assembly is located on the side, away from the substrate, of the supporting platform and used for heating a conductive layer of the substrate and / or a coating of the substrate. The coating device can improve the heating efficiency and the crystallization quality of a coating.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a coating device for preparing a battery and a manufacturing equipment for the battery. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] In the preparation process of perovskite batteries, after the perovskite coating on the substrate is completed, the perovskite coating needs to be heated to improve the crystallization quality of the film layer. At present, after the coating device completes the coating, it needs to be transferred to a heating device for heating and crystallization, which requires additional transfer equipment and delays the crystallization time. Or use the heating method of heat conduction in the coating device to make the heat conduct from the substrate to the perovskite coating, which is slow in heating speed and has insufficient controllability of heating temperature, affecting the crystallization quality of the perovskite coating and restricting the performance of the perovskite battery. CONTENT OF THE INVENTION

[0004] The present application aims to solve at least one of the technical problems in the background art. To this end, one object of the present application is to provide a coating device for preparing a battery and a manufacturing equipment for the battery to improve the heating efficiency and crystallization quality of the coating.

[0005] The first aspect of the embodiments of the present application provides a coating device for preparing a battery, which comprises a base assembly, a coating head, a moving assembly and an eddy current heating assembly. The base assembly comprises a support platform for carrying a substrate with a conductive layer; the coating head is used to coat a coating layer on the substrate; the moving assembly is connected with at least one of the support platform and the coating head, so that the support platform and the coating head can move relatively; the eddy current heating assembly is located on the side of the support platform away from the substrate, and is used to heat the conductive layer of the substrate and / or the coating layer of the substrate.

[0006] In the technical solution of the embodiments of the present application, the eddy current heating assembly can be used to preheat the conductive layer of the substrate in advance, which improves the uniformity of the coating layer during the coating process. After the coating is completed, the coating layer can be directly heated quickly, which reduces the waiting time and improves the crystallization quality of the coating layer. At the same time, the heating method of the eddy current heating assembly can reduce the risk of substrate deformation affecting the coating layer, which helps to improve the quality and integrity of the coating layer surface.

[0007] In some embodiments, the eddy current heating assembly comprises an electromagnetic heating coil arranged on a side of the support platform away from the substrate; and a controller electrically connected with the electromagnetic heating coil, the controller being configured to adjust a temperature rising rate of the electromagnetic heating coil. By using the controller to control the size and frequency of the current flowing through the electromagnetic heating coil, the temperature rising rate of the conductive layer of the substrate and the coating layer of the substrate can be controlled, so that the crystallization speed of the coating layer can be effectively controlled, and the crystallization quality of the coating layer is improved.

[0008] In some embodiments, the electromagnetic heating coil is a solenoid electromagnetic coil, and a central axis of the solenoid electromagnetic coil is parallel to a surface of the support platform on which the substrate is carried. By using solenoid electromagnetic coils of various specifications to achieve heating, subsequent installation and maintenance are facilitated, and maintenance costs are reduced.

[0009] In some embodiments, the electromagnetic heating coil is a planar solenoid electromagnetic coil, and an extension direction of the electromagnetic heating coil is parallel to a surface of the support platform on which the substrate is carried. By arranging the electromagnetic heating coil in a planar solenoid structure, the electromagnetic heating coil can be arranged in a two-dimensional plane, improving space utilization. The planar solenoid electromagnetic coil can increase the number of turns and the winding density, thereby improving the power density and the heating efficiency. Meanwhile, when the current passes through the planar solenoid electromagnetic coil, a relatively uniform magnetic field can be generated above the planar solenoid electromagnetic coil. The conductive layer of the substrate and the coating layer are in the uniform magnetic field, and stable and uniform heating effects can be achieved, thereby improving the crystallization quality of the coating layer.

[0010] In some embodiments, the support platform comprises a plurality of support regions arranged in a first direction in sequence, and the eddy current heating assembly comprises a plurality of electromagnetic heating coils arranged in one-to-one correspondence with the plurality of support regions; the controller is electrically connected with each electromagnetic heating coil and independently controls the current in each electromagnetic heating coil; and the first direction is parallel to a direction in which the support platform moves relative to the coating head. By dividing the support platform into a plurality of support regions and arranging an electromagnetic heating coil corresponding to each support region, the temperature of the coated region and the uncoated region can be adjusted respectively during the coating process, thereby reducing the time required for crystallization and shortening the waiting time after the coating is completed, and the crystallization quality of the coating layer is improved.

[0011] In some embodiments, the coating device further comprises a displacement sensor for detecting the distance between the support platform and the coating head; and the controller is signal connected with the displacement sensor, so as to control the temperature rising rate of the electromagnetic heating coil according to the detection result of the displacement sensor. By cooperating the controller with the displacement sensor, the temperature rising rate of the electromagnetic heating coil can be adjusted according to the current positional relationship, so that when the coating head coats any region, the temperature of the coating region reaches the temperature requirement, and the waste of energy caused by premature heating can be avoided.

[0012] In some embodiments, the coating device further comprises a temperature sensor configured to detect the temperature of the conductive layer and / or the coating layer on the substrate; and the controller is in signal connection with the temperature sensor, and configured to control the temperature rising rate of the electromagnetic heating coil according to the detection result of the temperature sensor. By matching the controller with the temperature sensor, the temperature rising rate of the electromagnetic heating coil can be adjusted according to the current temperature, so that when the coating head coats any area, the temperature of the coating area just reaches the temperature requirement, and the waste of energy caused by premature heating can be avoided.

[0013] In some embodiments, the controller is configured to adjust the temperature rising rate of the electromagnetic heating coil by controlling the size of the current in the electromagnetic heating coil, or by controlling the frequency of the current in the electromagnetic heating coil. By using the controller to control the size of the current and the frequency of the current flowing through the electromagnetic heating coil, the temperature rising rate of the conductive layer of the substrate and the coating layer of the substrate can be controlled, which is helpful for the temperature rising crystallization of the coating layer.

[0014] In some embodiments, the controller is further configured to adjust the temperature rising rate of the electromagnetic heating coil by adjusting the effective coil turns of the electromagnetic heating coil. By using the controller to control the effective coil turns of the electromagnetic heating coil, the temperature rising rate of the conductive layer of the substrate and the coating layer of the substrate can be controlled, which is helpful for the temperature rising crystallization of the coating layer.

[0015] Embodiments of the second aspect of the application provide a battery manufacturing device comprising the coating device described in the above embodiments.

[0016] The above description is only a summary of the technical solutions of the application. In order to enable the technical means of the application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the application to be more apparent and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0017] In the drawings, like reference numerals refer to same or similar elements throughout the several views. These drawings are not necessarily to scale. It should be understood that these drawings have been simplified for the purpose of clarity and illustration and are not intended to limit the scope of the application.

[0018] Figure 1 Structure diagram of the coating device for preparing perovskite battery in some embodiments of the application;

[0019] Figure 2 Schematic diagram of the relative positions of the support platform, the electromagnetic heating coil and the substrate in some embodiments of the application;

[0020] Figure 3 A schematic view of an electromagnetic heating coil structure for some embodiments of the present application;

[0021] Figure 4 A schematic view of a support platform including multiple support areas for some embodiments of the present application;

[0022] Figure 5 A top view of multiple support areas corresponding to the arrangement of electromagnetic heating coils for some embodiments of the present application.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 100, coating device; 110, base assembly; 111, support platform; 1111, first support area; 1112, second support area; 1113, third support area; 1114, fourth support area; 120, coating head; 130, moving assembly; 140, eddy current heating assembly; 141, electromagnetic heating coil; 142, controller; 150, displacement sensor; 160, temperature sensor; 200, substrate. DETAILED DESCRIPTION

[0025] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0027] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0028] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] In the description of the embodiments of the present application, the term "and / or" is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0030] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0031] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0032] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0033] At present, from the development of market situation, the application of battery is more and more extensive. The battery is not only applied to energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of the battery, the demand of its market is also increasing.

[0034] A perovskite cell, also known as a perovskite solar cell, is a solar cell that uses an organic metal halide perovskite as a light-absorbing material. The working principle of the perovskite cell is based on the photovoltaic effect. When sunlight shines on the perovskite solar cell, the photon energy is greater than the band gap of the material, and the perovskite material absorbs the photons to generate electron-hole pairs (excitons). These excitons are separated under the action of the built-in electric field, and the electrons are transported to the negative electrode, and the holes are transported to the positive electrode, forming an electric current, and completing the conversion of light energy to electrical energy.

[0035] In the preparation process of the perovskite cell, the coating device uniformly coats the perovskite material solution on the substrate to form a perovskite coating. After the coating is completed, the perovskite coating on the substrate needs to be heated to realize film crystallization. The crystallization quality of the perovskite coating has an important influence on the performance of the perovskite cell.

[0036] In some embodiments, after the coating device uniformly coats the perovskite material solution on the substrate to form a perovskite coating, the substrate is transferred to a drying device for drying and temperature rising crystallization treatment. Since the crystallization method of transferring to the drying device is adopted, additional transfer equipment needs to be arranged, which increases the cost and delays the crystallization time, which may affect the crystallization quality of the perovskite coating and further affect the performance of the perovskite cell.

[0037] In some embodiments, a heating plate is arranged in the coating device, the substrate with the conductive layer is directly contacted with the heating plate, the heating plate is powered to generate heat, and the heat is transmitted to the substrate through the heating plate by heat conduction, and then transmitted to the perovskite coating by the substrate, so as to realize the temperature rising crystallization of the perovskite coating. Since the physical characteristics of the heating plate and the substrate limit the rising rate, the heat conduction heating method cannot meet the requirements of rapid heating and temperature control precision, and the direct contact between the substrate and the heating plate and the heat transfer may cause the substrate to be deformed by heat, which affects the crystallization quality of the perovskite coating on the substrate and further affects the performance of the perovskite cell.

[0038] To solve the above problems, the application provides a coating device for preparing a battery, which comprises a base assembly, a coating head, a moving assembly and an eddy current heating assembly. The base assembly comprises a support platform for carrying a substrate with a conductive layer; the coating head is used for coating a coating layer on the substrate; the moving assembly is connected with at least one of the support platform and the coating head, so that the support platform and the coating head can move relatively; and the eddy current heating assembly is located on the side of the support platform away from the substrate, and is used for heating the conductive layer of the substrate and / or the coating layer of the substrate. By arranging the eddy current heating assembly, the conductive layer and / or the coating layer of the substrate can be directly heated, the uniformity of the coating layer in the coating process is improved, the rapid heating of the coating layer and the crystallization efficiency are realized, the waiting time is reduced, and the crystallization quality of the coating layer is improved.

[0039] The embodiments of the application disclose a coating device for preparing a battery and the battery, which can be used in a power generation system such as a centralized photovoltaic power station, a distributed photovoltaic power station or a photovoltaic building integrated system, but is not limited to this; can be used in an electric device such as a vehicle, a ship, an aircraft, a wearable device or a mobile charging device, but is not limited to this; and can be used in an energy storage or energy conversion device combined energy storage system or energy system such as a storage battery (for example, a lithium battery) or a fuel cell (for example, a hydrogen energy battery), but is not limited to this.

[0040] The embodiments of the application provide a coating device 100 for preparing a perovskite battery, as shown in Figure 1 Figure 1 The structure of the coating device for preparing a perovskite battery in some embodiments of the application is shown.

[0041] The coating device 100 comprises a base assembly 110, a coating head 120, a moving assembly 130 and an eddy current heating assembly 140. The base assembly 110 comprises a support platform 111 for carrying a substrate 200 with a conductive layer; the coating head 120 is used for coating a coating layer on the substrate 200; the moving assembly 130 is connected with at least one of the support platform 111 and the coating head 120, so that the support platform 111 and the coating head 120 can move relatively; and the eddy current heating assembly 140 is located on the side of the support platform 111 away from the substrate 200, and is used for heating the conductive layer of the substrate 200 and / or the coating layer of the substrate 200.

[0042] The coating device 100 is a device for coating and heating the substrate 200 of a battery, for example, a perovskite battery, and any battery that can be heated by the conductive layer of the substrate 200. For the convenience of explanation, the perovskite battery is taken as an example in the following description.

[0043] ​The substrate 200 of the perovskite battery has a plurality of hierarchical structures, including an ITO layer, a hole migration layer, a hole transport layer, a perovskite layer, an electron transport layer, and the like. The ITO layer, the hole migration layer, and the hole transport layer all have electrical conductivity, and therefore, the conductive layer of the substrate 200 can be one or more of the ITO layer, the hole migration layer, and the hole transport layer.

[0044] The base assembly 110 is a bottom structure of the coating device 100, which is used to support other components of the coating device 100. The base assembly 110 can be, for example, a three-dimensional frame structure, a box structure, a flat plate structure, or the like. The specific structure is not limited in the embodiments of the present application.

[0045] The base assembly 110 includes a support platform 111, which can be a flat plate structure of any shape, such as a square, a square plate, or the like. The size can also be determined according to actual needs. For example, the length of the support platform 111 is 2 meters, and the width is 1 meter. The support platform 111 can include oppositely arranged upper and lower surfaces. The upper surface is used to carry the substrate 200 having a conductive layer, and the lower surface is used to connect with other structures of the base assembly 110 or other components of the coating device 100.

[0046] The coating head 120 is used to coat a coating layer on the substrate 200. For example, the coating layer is a perovskite coating layer. The coating head 120 is a device for uniformly coating a perovskite material solution on the substrate 200 to form a perovskite coating layer. The coating head 120 can be, for example, a slot coating head, a trough coating head, or the like. For ease of description, the following exemplary description is based on the slot coating head.

[0047] The coating width of the slot coating head is comparable to the width of the substrate 200 that needs to be coated. It can be understood that the coating head 120 moves from one end of the substrate 200 to the other end, i.e., the coating is completed, without the need for back-and-forth coating on the same substrate 200.

[0048] The moving assembly 130 is a device for enabling relative movement between the support platform 111 and the coating head 120 to achieve coating requirements. The moving assembly 130 can be any feasible power component, such as a pneumatic cylinder, a motor, a combination of a motor and a gear rack, a combination of a motor and a threaded rod, or the like. The specific structure is not limited in the embodiments of the present application.

[0049] For example, the rack is fixed on the base assembly 110, and the motor and the gear are installed on the coating head 120. The gear on the coating head 120 is engaged with the rack on the base assembly 110. Under the drive of the motor, the gear rotates on the rack, achieving the movement of the coating head 120 relative to the support platform 111.

[0050] The eddy current heating assembly 140 is a component for providing a heat source for heating the conductive layer of the substrate 200 and the perovskite coating of the substrate 200. The eddy current heating assembly 140 can generate eddy currents inside the conductive layer and inside the perovskite coating to achieve heating. This heating method can directly act on the conductive layer or the perovskite coating without passing through the substrate 200 for heat conduction. This can not only improve the heating efficiency, but also reduce the influence of uneven heat conduction and the probability of deformation of the substrate 200.

[0051] In some embodiments, before the substrate 200 is coated by the coating head 120, the surface has not yet formed a perovskite coating. The eddy current heating assembly 140 can only heat the conductive layer of the substrate 200, so that it can be preheated before coating begins, thereby facilitating improved coating quality.

[0052] In some embodiments, after the substrate 200 is coated by the coating head 120, the surface has formed a perovskite coating. The eddy current heating assembly 140 can heat the perovskite coating of the substrate 200 to achieve efficient and high-quality crystallization of the perovskite coating, thereby simplifying the production process and improving production efficiency.

[0053] In some embodiments, the eddy current heating assembly 140 can simultaneously preheat the uncoated conductive layer and heat and crystallize the coated perovskite coating, thereby improving the film quality and production efficiency of the perovskite coating.

[0054] The eddy current heating assembly 140 can be any feasible eddy current generating device that can generate eddy currents in the conductive layer and / or the perovskite coating of the substrate 200 to achieve heat generation and temperature rise. In some embodiments, the eddy current heating assembly 140 can include an electromagnetic heating coil. By providing an alternating current to the electromagnetic heating coil, the electromagnetic heating coil generates an alternating magnetic field around it. The alternating magnetic field induces eddy currents inside the conductive layer and the perovskite coating to be heated, thereby generating heat. Therefore, the heat source for the temperature rise and crystallization of the perovskite coating can include heat conduction from the conductive layer and internal eddy current heat generation. The perovskite coating is heated and crystallized using multiple heat sources, so that the perovskite coating forms a perovskite film.

[0055] It should be noted that the substrate 200 can be preheated by the eddy current heating assembly 140 before being coated by the coating head 120. The preheating temperature can be determined as required, for example, between 40°C and 60°C, and can be 40°C, 50°C, 60°C, etc. After coating is completed, the substrate 200 can be heated and crystallized by the eddy current heating assembly 140. The heating temperature can be determined as required, for example, between 80°C and 140°C, and can be 80°C, 90°C, 100°C, 120°C, 130°C, 140°C, etc.

[0056] By setting the eddy current heating assembly 140, the conductive layer of the substrate 200 can be preheated in advance, and the uniformity of the perovskite coating layer in the coating process is improved. After the coating is completed, the perovskite coating layer can be directly heated quickly, reducing the waiting time, thereby improving the crystallization quality of the perovskite coating layer. At the same time, by using the heating mode of the eddy current heating assembly 140, the risk of deformation of the substrate 200 affecting the perovskite coating layer can be reduced, which helps to improve the quality and integrity of the surface of the perovskite coating layer.

[0057] As shown in Figure 1 and Figure 2 , the support platform of some embodiments of the present application and the relative position of the electromagnetic heating coil and the substrate are shown in the schematic diagram. Figure 2

[0058] According to some embodiments of the present application, the eddy current heating assembly 140 includes an electromagnetic heating coil 141 and a controller 142, and the electromagnetic heating coil 141 is arranged on the side of the support platform 111 away from the substrate. The controller 142 is electrically connected with the electromagnetic heating coil 141, and the controller 142 is configured to adjust the temperature rising rate of the electromagnetic heating coil 141.

[0059] The electromagnetic heating coil 141 is a device that generates heat by using the principle of electromagnetic induction. When an alternating current passes through the electromagnetic heating coil 141, an alternating magnetic field is generated. The winding method of the electromagnetic heating coil 141 can be adjusted according to the structure and position of the conductor part that needs to be heated, and the winding method of the electromagnetic heating coil 141 is, for example, a spiral pipe type electromagnetic coil, a planar spiral type electromagnetic coil, etc.

[0060] The electromagnetic heating coil 141 is arranged on the side of the support platform 111 away from the substrate, which can be understood as the upper surface of the support platform 111 for carrying the substrate 200 with a conductive layer, and the electromagnetic heating coil 141 is arranged on the lower surface of the support platform 111. The electromagnetic heating coil 141 can be directly fixedly connected to the lower surface of the support platform 111, or can be arranged in a space formed between the support platform 111 and the bottom plate in the base assembly 110, and it can be understood that the space can be open or closed, for example, the support platform 111 and the bottom plate form a closed mounting cavity for arranging the electromagnetic heating coil 141.

[0061] ​The controller 142 is electrically connected with the electromagnetic heating coil 141, and can thus control the working state of the electromagnetic heating coil 141, such as power-on, power-off or other function control. In the embodiments of the present application, the controller 142 can be used to adjust the temperature rising rate of the electromagnetic heating coil 141. Specifically, the temperature rising rate of the electromagnetic heating coil 141 can be adjusted by adjusting the strength of the alternating magnetic field generated by the electromagnetic heating coil 141, including controlling the size of the current passing through the electromagnetic heating coil 141 and the frequency of the current passing through the electromagnetic heating coil 141, so as to adjust the temperature rising rate of the conductive layer of the substrate 200 and the perovskite coating. The temperature rising rate is, for example, greater than or equal to 10℃ per minute and less than or equal to 140℃ per minute, and specifically 10℃ / min, 50℃ / min, 100℃ / min or 140℃ / min, etc.

[0062] By using the controller 142 to control and adjust the size and frequency of the current passing through the electromagnetic heating coil 141, the temperature rising rate of the conductive layer of the substrate 200 and the perovskite coating of the substrate 200 can be controlled, so as to effectively control the crystallization speed of the perovskite coating and improve the crystallization quality of the perovskite coating.

[0063] According to some embodiments of the present application, the electromagnetic heating coil 141 is a spiral tube type electromagnetic coil, and the central axis of the spiral tube type electromagnetic coil is parallel to the surface of the support platform 111 on which the substrate 200 is carried.

[0064] The spiral tube type electromagnetic coil is in a spiral shape and extends from one end to the other end in a spiral winding manner around the central axis. The upper surface of the support platform 111 is used to carry the substrate 200 having a conductive layer, and the lower surface of the support platform 111 is provided with the spiral tube type electromagnetic coil. The direction of the central axis of the spiral tube type electromagnetic coil, i.e. the spiral winding extension direction, is parallel to the surface on which the substrate 200 is carried. It can be understood that, considering the limited processing precision of products, the parallel here does not mean absolute parallel, but basic parallel with a certain error allowed.

[0065] By using spiral tube type electromagnetic coils with rich specifications to achieve heating, subsequent installation and maintenance are facilitated, and maintenance costs are reduced.

[0066] As shown in FIGS. 1, 2 and 3, Figure 2 and Figure 3 , FIG. 4 is a structural schematic diagram of an electromagnetic heating coil according to some embodiments of the present application. Figure 3

[0067] According to some embodiments of the present application, the electromagnetic heating coil 141 is a planar spiral type electromagnetic coil, and the extension direction of the electromagnetic heating coil 141 is parallel to the surface of the support platform 111 on which the substrate 200 is carried.

[0068] ​The electromagnetic heating coil 141 is a planar spiral electromagnetic coil, meaning that the electromagnetic heating coil 141 extends spirally within a plane, and this plane is parallel to the upper surface of the support platform 111. It is understandable that, considering the limited processing precision of the product, this parallelism does not refer to absolute parallelism, but rather a basic parallelism that allows for a certain degree of error.

[0069] In some examples, the electromagnetic heating coil 141 can be directly fixed to the lower surface of the support platform 111.

[0070] When current passes through the planar spiral electromagnetic coil, a relatively uniform magnetic field is generated in the planar region above or below it. Since the substrate 200 is located above the electromagnetic heating coil 141, the conductive layer and perovskite coating of the substrate 200 are situated within this uniform magnetic field. The specific number of turns in the electromagnetic heating coil 141 can be determined according to actual needs, such as 10 turns, 15 turns, etc.

[0071] By arranging the electromagnetic heating coil 141 into a planar spiral structure, it can be laid out in a two-dimensional plane, improving space utilization. The planar spiral electromagnetic coil can increase the number of turns and the winding density, thereby improving power density and heating efficiency. At the same time, when current passes through the planar spiral electromagnetic coil, a relatively uniform magnetic field is generated above it. The conductive layer of the substrate 200 and the perovskite coating are in a uniform magnetic field, which can achieve a stable and uniform heating effect and improve the crystal quality of the perovskite coating.

[0072] like Figure 4 and Figure 5 As shown, Figure 4 This is a schematic diagram of the structure of the support platform including multiple support regions in some embodiments of this application; Figure 5 A top view showing that electromagnetic heating coils are provided for multiple support areas in some embodiments of this application.

[0073] According to some embodiments of this application, the support platform 111 includes a plurality of support regions arranged sequentially along a first direction, and the eddy current heating assembly 140 includes a plurality of electromagnetic heating coils 141 arranged one-to-one with the plurality of support regions; the controller 142 is electrically connected to each electromagnetic heating coil 141 and independently controls the current in each electromagnetic heating coil 141; wherein, the first direction is parallel to the direction in which the support platform 111 moves relative to the coating head 120.

[0074] The support platform 111 is divided into multiple support areas along a first direction, which is parallel to the direction in which the support platform 111 moves relative to the coating head 120. Figure 4 The number of support areas is not limited in the direction indicated by the middle arrow; for example, there may be 5, 10, etc.

[0075] For example, the support platform 111 has a length of 2 meters and a width of 1 meter, and is divided into 10 support areas along the first direction, i.e., each support area has a width of 1 meter and a length of 20 centimeters.

[0076] Each support area of the support platform 111 is provided with an electromagnetic heating coil 141. The number of electromagnetic heating coils 141 provided in each support area is not limited, for example, one or two, as long as each support area can generate heat by using the electromagnetic heating coil 141.

[0077] The controller 142 is electrically connected to each electromagnetic heating coil 141, including connection by communication wire and wireless signal connection. The number of controllers 142 can be one, and each electromagnetic heating coil 141 is controlled by the single controller 142. The number of controllers 142 can be multiple, and each controller 142 independently controls the corresponding electromagnetic heating coil 141. The controller 142 adjusts the temperature rising rate of the electromagnetic heating coil 141, including controlling the size of the current of the electromagnetic heating coil 141 and the frequency of the current of the electromagnetic heating coil 141, so as to adjust the temperature rising rate of the conductive layer and the perovskite coating of the substrate 200 corresponding to the electromagnetic heating coil 141.

[0078] By dividing the support platform 111 into multiple support areas and providing each support area with an electromagnetic heating coil 141, the temperature of the coated area and the uncoated area can be adjusted respectively during the coating process, thereby reducing the time required for crystallization and shortening the waiting time after the completion of the perovskite coating to improve the crystallization quality of the perovskite coating.

[0079] According to some embodiments of the present application, as shown in Figure 4 The coating device 100 further includes a displacement sensor 150 for detecting the distance between the support platform 111 and the coating head 120. The controller 142 is signal connected to the displacement sensor 150 to control the temperature rising rate of the electromagnetic heating coil 141 according to the detection result of the displacement sensor 150.

[0080] The displacement sensor 150 is used to detect the relative distance between the support platform 111 and the coating head 120. The relative distance can be understood as the distance between the displacement sensor 150 and the coating head 120 in the first direction on the support platform 111. The displacement sensor 150 can be any sensor that can detect displacement or distance, including but not limited to an infrared sensor, a photoelectric sensor, or a vision sensor.

[0081] The controller 142 is in signal connection with the displacement sensor 150 for receiving the detection result of the displacement sensor 150, and the connection mode can be wired connection or wireless connection, for example, through Bluetooth connection. The controller 142 can include a processing unit which can process the detection result of the displacement sensor 150, and specifically specify the corresponding heating strategy according to the heating requirement of the target heating area, and output the control signal to the corresponding electromagnetic heating coil 141.

[0082] For example, the length of the support platform 111 is 2 meters, and the width is 1 meter. The support platform 111 is divided into 10 support areas along the first direction, that is, the width of each support area is 1 meter, and the length is 20 centimeters. The coating speed of the coating head 120 is 20 centimeters per minute. The displacement sensor 150 is arranged at the coating starting end of each support area.

[0083] When the coating head 120 is located at the starting end of the first support area 1111.

[0084] The distance between the coating head 120 and the starting end of the second support area 1112 measured by the displacement sensor 150 of the second support area 1112 is 20 centimeters, so it takes 1 minute for the coating head 120 to move to the starting end of the second support area 1112. For example, if the current temperature of the substrate 200 in the second support area 1112 is 10℃, and the coating temperature needs to be 50℃, the controller 142 can control the temperature rising rate of the electromagnetic heating coil 141 to be 40℃ per minute, so that when the coating head 120 moves to the starting end of the second support area 1112, the temperature of the substrate 200 in the second support area 1112 is just raised to 50℃.

[0085] The distance between the coating head 120 and the starting end of the third support area 1113 measured by the displacement sensor 150 of the third support area 1113 is 40 centimeters, so it takes 2 minutes for the coating head 120 to move to the starting end of the third support area 1113. For example, if the current temperature of the substrate 200 in the third support area 1113 is 10℃, and the coating temperature needs to be 50℃, the controller 142 can control the temperature rising rate of the electromagnetic heating coil 141 to be 20℃ per minute, so that when the coating head 120 moves to the starting end of the third support area 1113, the temperature of the substrate 200 in the third support area 1113 is just raised to 50℃. Similarly.

[0086] It should be noted that, considering that the electromagnetic heating coil 141 has a high temperature rising rate, the temperature rising rate of the electromagnetic heating coil 141 can also be fixed, and the electromagnetic heating coil 141 is sequentially turned on according to the order of the support areas. For example, when the coating head 120 coats the first support area 1111, the electromagnetic heating coil 141 of the third support area 1113 is turned on; when the coating head 120 coats the second support area 1112, the electromagnetic heating coil 141 of the fourth support area 1114 is turned on.

[0087] Meanwhile, after each support area is coated, the electromagnetic heating coil 141 corresponding to the support area can be controlled to rise in temperature by the controller 142 to meet the crystallization temperature requirement.

[0088] In the embodiment of the present application, the displacement sensor 150 can not only specifically determine the distance between a certain area or position of the substrate 200 and the coating head 120, but also determine whether the area is an uncoated area or a coated area according to the positional relationship between the area and the coating head 120. In this way, the controller 142 can further control the electromagnetic heating coil 141 to heat in a targeted manner according to the specific situation.

[0089] By cooperating the controller 142 with the displacement sensor 150, the temperature rising rate of the electromagnetic heating coil 141 can be adjusted according to the current positional relationship, so that when the coating head 120 coats any area, the temperature of the coating area reaches the temperature requirement, which can avoid the waste of energy caused by premature temperature rising.

[0090] According to some embodiments of the present application, as shown in Figure 4 The coating device 100 further includes a temperature sensor 160, which is configured to detect the temperature of the conductive layer and / or the coating layer on the substrate 200; and the controller 142 is in signal connection with the temperature sensor 160, so as to control the temperature rising rate of the electromagnetic heating coil 141 according to the detection result of the temperature sensor 160.

[0091] The temperature sensor 160 is a device capable of sensing temperature and converting it into a measurable signal, and the specific types can include but are not limited to thermocouples, thermal resistors, thermistors, semiconductor temperature sensors, infrared temperature sensors, optical fiber temperature sensors, etc. In the embodiment of the present application, the temperature sensor 160 is configured to directly detect the temperature of the conductive layer and / or the perovskite coating layer on the substrate 200 on the support platform 111, and the temperature of the conductive layer or the perovskite coating layer can also be determined by detecting the temperature of the substrate 200 according to the heat conduction relationship between the substrate 200 and the conductive layer or the perovskite coating layer. The number of temperature sensors 160 can be one or more.

[0092] For example, the support platform 111 is divided into 10 support areas along the first direction, and a temperature sensor 160 is arranged in each support area. The coating time of each support area is 1 minute.

[0093] When the coating head 120 is located at the starting end of the first support area 1111, the temperature of the substrate 200 in the second support area 1112 is 10°C, and the coating temperature needs to be 50°C. The controller 142 can control the temperature rising rate of the electromagnetic heating coil 141 to be 40°C per minute, so that when the coating head 120 moves to the starting end of the second support area 1112, the temperature of the substrate 200 in the second support area 1112 is just raised to 50°C. The controller 142 can also control the temperature rising rate of the electromagnetic heating coil 141 to be 80°C per minute, and then perform temperature maintenance after temperature rising, or perform temperature rising again half a minute before coating. The support areas can be sequentially deduced.

[0094] After the coating of each support area is completed, the controller 142 can control the electromagnetic heating coil 141 corresponding to the support area to rise in temperature to meet the crystallization temperature requirement.

[0095] By cooperating the controller 142 with the temperature sensor 160, the temperature rising rate of the electromagnetic heating coil 141 can be adjusted according to the current temperature, so that when the coating head 120 coats any area, the temperature of the coating area just reaches the temperature requirement, which can avoid the waste of energy caused by excessive temperature rising.

[0096] According to some embodiments of the present application, the controller 142 is configured to adjust the temperature rising rate of the electromagnetic heating coil 141 by controlling the size of the current in the electromagnetic heating coil 141.

[0097] In some embodiments, the controller 142 is configured to adjust the temperature rising rate of the electromagnetic heating coil 141 by controlling the frequency of the current in the electromagnetic heating coil 141.

[0098] The temperature rising rate refers to the increase value of temperature per unit time, which reflects the speed of temperature change of an object or a system. In the embodiments of the present application, the temperature rising rate can be used to reflect the heating capacity of the eddy current heating assembly.

[0099] When the current in the electromagnetic heating coil 141 increases, the magnetic field strength generated by the electromagnetic heating coil 141 also increases accordingly. The increase of the magnetic field strength increases the eddy current strength in the conductive layer and the perovskite coating of the substrate 200, generates more heat, and increases the temperature rising rate. Correspondingly, when the current decreases, the eddy current strength also decreases, and the temperature rising rate also decreases.

[0100] When an alternating current passes through the electromagnetic heating coil 141, an alternating magnetic field is generated. The higher the frequency of the alternating current, the faster the alternating magnetic field changes, and the stronger the eddy current effect in the conductive layer of the substrate 200 and the perovskite coating layer, thereby increasing the temperature rise rate. Conversely, the lower the frequency of the alternating current, the slower the temperature rise rate.

[0101] By using the controller 142 to control the size of the current flowing through the electromagnetic heating coil 141 and the frequency of the current, the temperature rise rate of the conductive layer of the substrate 200 and the perovskite coating layer of the substrate 200 can be controlled, which helps the perovskite coating layer to crystallize by heating.

[0102] According to some embodiments of the present application, the controller 142 is further configured to adjust the temperature rise rate of the electromagnetic heating coil 141 by adjusting the effective number of turns of the electromagnetic heating coil 141.

[0103] With the current being constant, a change in the effective number of turns of the electromagnetic heating coil 141 will also cause a change in the magnetic field strength, which in turn affects the temperature rise rate. For example, increasing the effective number of turns of the electromagnetic heating coil 141 will increase the magnetic field strength and the temperature rise rate, while decreasing the effective number of turns will weaken the magnetic field strength and reduce the temperature rise rate.

[0104] The electromagnetic heating coil 141 can be divided into multiple sub-coil modules in series or in parallel, and each module can be controlled by the controller 142 to be connected or disconnected from the circuit, thereby indirectly changing the effective number of turns of the entire electromagnetic heating coil 141. When rapid heating is required, the controller 142 controls a relatively large number of sub-coil modules to be connected; when rapid heating is not required, the controller 142 controls a relatively small number of sub-coil modules to be connected.

[0105] By using the controller 142 to control the effective number of turns of the electromagnetic heating coil 141, the temperature rise rate of the conductive layer of the substrate 200 and the perovskite coating layer of the substrate 200 can be controlled, which helps the perovskite coating layer to crystallize by heating.

[0106] The embodiments of the present application also provide a manufacturing device for a battery, which includes the coating device in any of the above embodiments.

[0107] In some embodiments, in combination with Figure 1 and Figure 4 As shown in FIGS. 1-3, a coating device 100 for preparing a battery is provided, which includes a base assembly 110, a coating head 120, a moving assembly 130, an eddy current heating assembly 140, a displacement sensor 150, and a temperature sensor 160.

[0108] The base assembly 110 comprises a support platform 111, which sequentially provides a plurality of support areas along a first direction, each of the support areas comprises oppositely arranged upper and lower surfaces, the upper surface of each of the support areas is used to carry the substrate 200 with the conductive layer, and the lower surface of each of the support areas is used to mount the eddy current heating assembly 140.

[0109] The eddy current heating assembly 140 comprises an electromagnetic heating coil 141 and a controller 142 connected electrically, the electromagnetic heating coil 141 is a planar spiral electromagnetic coil, and the plane in which the extension direction of the electromagnetic heating coil 141 is parallel to the surface of the support platform 111 carrying the substrate 200. The electromagnetic heating coil 141 is independently arranged in each of the support areas, and is independently controlled by the controller 142.

[0110] Each of the support areas is further provided with a displacement sensor 150 and a temperature sensor 160, the displacement sensor 150 of each of the support areas is used to detect the distance between the current support area and the coating head 120, and the temperature sensor 160 of each of the support areas is used to detect the temperature of the conductive layer and / or the perovskite coating layer on the substrate 200 corresponding to the current support area; the controller 142 is signal connected with the displacement sensor 150 and the temperature sensor 160 respectively, so as to control the temperature rising rate of the electromagnetic heating coil 141 according to the detection results of the displacement sensor 150 and the temperature sensor 160.

[0111] The moving assembly 130 comprises a motor and a gear rack, the rack is fixed on the base assembly 110, and the motor and the gear are installed on the coating head 120, the gear on the coating head 120 and the rack on the base assembly 110 are mutually engaged, under the driving of the motor, the gear rotates on the rack, and the movement of the coating head 120 relative to the support platform 111 is realized.

[0112] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each of the technical features mentioned in the embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A coating device for preparing a battery, characterized by, The coating device comprises: a base assembly comprising a support platform for carrying a substrate having a conductive layer; a coating head for coating a coating layer on the substrate; a moving assembly connected to at least one of the support platform and the coating head to enable relative movement of the support platform and the coating head; an eddy current heating assembly located on a side of the support platform away from the substrate, the eddy current heating assembly being configured to heat the conductive layer of the substrate and / or the coating layer of the substrate.

2. The coating apparatus according to claim 1, characterized in that The eddy current heating assembly comprises: an electromagnetic heating coil disposed on a side of the support platform away from the substrate; and a controller electrically connected to the electromagnetic heating coil, the controller being configured to adjust a temperature rise rate of the electromagnetic heating coil.

3. The coating apparatus according to claim 2, wherein The electromagnetic heating coil is a solenoid coil, and a central axis of the solenoid coil is parallel to a surface of the support platform on which the substrate is carried.

4. The coating apparatus according to claim 2, wherein The electromagnetic heating coil is a planar solenoid coil, and a plane in which an extension direction of the electromagnetic heating coil is parallel to the surface of the support platform on which the substrate is carried.

5. The coating apparatus according to any one of claims 2 to 4, characterized in that The support platform comprises a plurality of support regions arranged in a first direction in sequence. The eddy current heating assembly comprises a plurality of electromagnetic heating coils corresponding to the plurality of support regions in one-to-one correspondence, and the controller is electrically connected to each of the electromagnetic heating coils and independently controls a current in each of the electromagnetic heating coils. The first direction is parallel to a direction in which the support platform moves relative to the coating head.

6. The coating apparatus according to any one of claims 2 to 5, characterized in that The coating device further comprises: a displacement sensor for detecting a distance between the support platform and the coating head; The controller is signal connected to the displacement sensor to control the temperature rise rate of the electromagnetic heating coil according to a detection result of the displacement sensor.

7. The coating apparatus according to any one of claims 2 to 6, characterized in that The coating device further comprises: a temperature sensor for detecting a temperature of the conductive layer and / or the coating layer on the substrate; The controller is signal connected to the temperature sensor to control the temperature rise rate of the electromagnetic heating coil according to a detection result of the temperature sensor.

8. The coating apparatus according to any one of claims 2 to 7, characterized in that The controller is configured to adjust the temperature rise rate of the electromagnetic heating coil by controlling a magnitude of the current in the electromagnetic heating coil or by controlling a frequency of the current in the electromagnetic heating coil.

9. The coating apparatus according to any one of claims 2 to 8, characterized in that The controller is further configured to adjust the temperature rise rate of the electromagnetic heating coil by adjusting an effective number of turns of the electromagnetic heating coil.

10. A manufacturing apparatus of a battery, characterized by comprising: The coating device comprises: The coating device according to any one of claims 1-9.

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