Heating device for preparing battery and battery manufacturing equipment

Abstract

The utility model provides a heating device for preparing a battery and battery manufacturing equipment, and belongs to the field of batteries. The heating device is used for heating a target workpiece with a conductive layer, the target workpiece is used for preparing a battery, the heating device comprises a base assembly, a cover body and an eddy current heating assembly, the base assembly comprises a supporting plate, and the supporting plate is used for bearing the target workpiece; the cover body is used for being in butt joint with the base assembly, and a containing cavity for containing a target workpiece is defined by the cover body and the base assembly. The eddy current heating assembly is located in the containing cavity and used for heating a conductive layer of the target workpiece. The heating device can improve the heating efficiency and crystallization quality of the conductive layer of the target workpiece.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a heating device and battery manufacturing equipment for preparing batteries. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In the fabrication process of perovskite solar cells, after the conductive layer on the substrate is formed, it needs to be heated to improve the crystallinity of the film. Currently, the heating method using heat conduction results in a slow heating rate through the substrate to the conductive layer, and insufficient controllability of the heating temperature, which affects the crystallinity of the conductive layer and limits the performance of the perovskite solar cell. Utility Model Content

[0004] This application aims to at least address one of the technical problems existing in the background art. Therefore, one objective of this application is to provide a heating device and battery manufacturing equipment for preparing batteries, thereby improving the heating efficiency and crystallization quality of the conductive layer.

[0005] An embodiment of the first aspect of this application provides a heating device for preparing a battery. The heating device is used to heat a target workpiece having a conductive layer. The target workpiece is used to prepare a battery. The heating device includes a base assembly, a cover, and an eddy current heating assembly. The base assembly includes a support plate for supporting the target workpiece. The cover is used to dock with the base assembly and together with the base assembly defines a receiving cavity for accommodating the target workpiece. The eddy current heating assembly is located in the receiving cavity and is used to heat the conductive layer of the target workpiece.

[0006] In the technical solution of this application embodiment, an alternating magnetic field is generated by passing an alternating current through a coil in real time. This magnetic field induces eddy currents within the conductive layer, thereby heating and crystallizing the conductive layer of the target workpiece. Adjusting the magnitude and frequency of the current allows for rapid heating and cooling of the conductive layer, effectively controlling the crystallization rate and improving its quality. Furthermore, the eddy current heating method avoids deformation of the glass structure in the substrate, which could affect the deformation of the target workpiece, thus helping to protect the quality and integrity of the conductive layer surface.

[0007] In some embodiments, the eddy current heating assembly includes a first electromagnetic heating coil supported by a support plate, and the first electromagnetic heating coil and the target workpiece are located on the same side of the support plate. By positioning the first electromagnetic heating coil and the target workpiece on the same side of the support plate, the space occupied in the vertical direction is reduced, improving space utilization and facilitating the installation and maintenance of the first electromagnetic heating coil; it also shortens the distance between the first electromagnetic heating coil and the target workpiece, which is beneficial to improving heating efficiency.

[0008] In some embodiments, the first electromagnetic heating coil extends in a helical structure away from the support plate, and the target workpiece is located within a cavity formed by the first electromagnetic heating coil. By setting the first electromagnetic heating coil in a helical structure, a longer coil can be arranged in a smaller space, improving space utilization and also increasing power density and heating efficiency. When the target workpiece is placed within the cavity formed by the helical structure, the conductive layer of the target workpiece is in a uniform magnetic field. Furthermore, the symmetry of the helical structure results in a relatively uniform current distribution across the cross-section of the first electromagnetic heating coil. This uniform current distribution helps reduce local overheating of the first electromagnetic heating coil, improving its lifespan and stability. It also enables uniform and efficient heating of the conductive layer, improving the crystal quality of the conductive layer of the target workpiece.

[0009] In some embodiments, the base assembly further includes a base plate located on the side of the support plate facing away from the target workpiece and spaced apart from the support plate; the eddy current heating assembly includes a second electromagnetic heating coil located between the base plate and the support plate. By having the second electromagnetic heating coil and the target workpiece respectively positioned on opposite sides of the support plate, the structural layout is clearly layered, preventing physical contact or interference between the two, which facilitates quick handling or placement of the target workpiece and improves the efficiency of target workpiece processing.

[0010] In some embodiments, the second electromagnetic heating coil has a planar helical structure, and the plane in which the extension direction of the second electromagnetic heating coil lies is parallel to the surface of the support plate facing away from the target workpiece. By setting the second electromagnetic heating coil as a planar helical structure, it can be arranged in a two-dimensional plane, improving space utilization. The planar helical coil can increase the number of turns and the winding tightness, thereby improving power density and heating efficiency. At the same time, when current passes through the planar helical coil, a relatively uniform magnetic field can be generated in the planar region above or below it. The conductive layer of the target workpiece is in a uniform magnetic field, which can achieve a stable and uniform heating effect and improve the crystal quality of the conductive layer of the perovskite solar cell.

[0011] In some embodiments, the eddy current heating assembly includes a third electromagnetic heating coil, which is fixedly connected to the inner surface of the cover for forming a receiving cavity.

[0012] By fixing the third electromagnetic heating coil to the inner surface of the cover, the space occupied in the vertical direction is reduced, improving space utilization. At the same time, the third electromagnetic heating coil can also be separated from the target workpiece when the cover and base assembly are separated, so as not to affect the picking or placing of the target workpiece, reducing the probability of interference between the third electromagnetic heating coil and the target workpiece, and improving the efficiency of the target workpiece heating process.

[0013] In some embodiments, the eddy current heating assembly includes a plurality of fourth electromagnetic heating coils; the heating device further includes a controller connected to each of the plurality of fourth electromagnetic heating coils and controlling the current of each of the plurality of fourth electromagnetic heating coils respectively; wherein, the fourth electromagnetic heating coil includes at least one of a first electromagnetic heating coil, a second electromagnetic heating coil, and a third electromagnetic heating coil, the first electromagnetic heating coil and the target workpiece are located on the same side of the support plate, the second electromagnetic heating coil and the target workpiece are located on opposite sides of the support plate respectively, and the third electromagnetic heating coil is fixedly connected to the inner surface of the cover body for forming the receiving cavity. By setting multiple fourth electromagnetic heating coils, and each fourth electromagnetic heating coil is independently controlled, different numbers and positions of the fourth electromagnetic heating coils can be activated for heating according to actual needs, which can improve the flexibility of heating control of the eddy current heating assembly and meet the needs of heating and crystallizing target workpieces of various specifications.

[0014] In some embodiments, the heating device further includes a first lifting unit connected to the cover body, used to control the lifting and lowering of the cover body, so that the cover body can dock with the base assembly to form a receiving cavity or separate from the base assembly. By setting up the first lifting unit, the connection and separation of the cover body and the base assembly can be carried out by the first lifting unit, effectively improving the automation level of the heating device, saving manpower and improving the efficiency of batch processing of target workpieces.

[0015] In some embodiments, the heating device further includes a second lifting unit connected to the base assembly, used to control the lifting of the base assembly, enabling the base assembly to dock with the cover to form a receiving cavity or to separate from the cover. By providing the second lifting unit, the connection and separation of the cover and the base assembly are effectively improved, thus saving manpower and increasing the efficiency of batch processing of target workpieces.

[0016] In some embodiments, the eddy current heating assembly is configured to electromagnetically heat the conductive layer at a rate greater than or equal to 10°C and less than or equal to 140°C per minute. By controlling the heating rate of the conductive layer electromagnetically heated by the eddy current heating assembly, the crystal quality of the conductive layer of the target workpiece can be improved.

[0017] In some embodiments, the heating device further includes a vacuum assembly, which includes a vacuum pipe, a vacuum pump, and a vacuum valve. A first end of the vacuum pipe is connected to a receiving cavity via a cover; the vacuum pump is connected to a second end of the vacuum pipe; and the vacuum valve is located within the vacuum pipe and is used to control the connection or disconnection between the first and second ends. By providing a vacuum assembly, a vacuum environment is created for the target workpiece to prevent oxidation, while simultaneously allowing for rapid extraction of volatile solutions, thereby improving the crystal quality of the conductive layer of the target workpiece and ultimately enhancing the performance of the perovskite solar cell.

[0018] In some embodiments, the heating device further includes a vacuum breaker valve for supplying gas to the containment cavity. The vacuum breaker valve includes at least a first port, a second port, and a valve core for controlling the on / off state of the first and second ports. The first port of the vacuum breaker valve communicates with the containment cavity through a cover, and the second port communicates with the outside gas. By providing the vacuum breaker valve, after drying is complete, the vacuum breaker valve allows air to slowly enter the containment cavity, minimizing damage to components caused by excessive pressure changes within the containment cavity, and gradually restoring the internal pressure of the containment cavity to a level close to the outside atmospheric pressure.

[0019] In some embodiments, the heating device further includes a multi-way valve, which includes at least a first connecting valve port, a second connecting valve port, and a third connecting valve port that are interconnected. The first connecting valve port is connected to the receiving cavity through a cover, the second connecting valve port is connected to the first end of the suction pipe, and the third connecting valve port is connected to the first interface of the vacuum breaker valve. By providing a multi-way valve, one connecting valve port of the multi-way valve is connected to the receiving cavity, and the remaining connecting valve ports are respectively connected to the vacuum breaker valve and the suction pipe. Both the vacuum breaker valve and the suction pipe are connected to the receiving cavity through the multi-way valve, which reduces the number of openings on the cover and facilitates the connection and installation of the vacuum breaker valve and the suction pipe.

[0020] An embodiment of the second aspect of this application provides a battery manufacturing apparatus, which includes the heating device described in the above embodiments.

[0021] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0022] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0023] Figure 1 This is a schematic diagram of the structure of a heating device for preparing perovskite solar cells according to some embodiments of this application;

[0024] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0025] Figure 3 This is a schematic diagram of the structure of the second electromagnetic heating coil in some embodiments of this application;

[0026] Figure 4 This is a schematic diagram of the structure of another heating device for preparing perovskite solar cells according to some embodiments of this application;

[0027] Figure 5 This is a schematic diagram of the connection between the cover and the multi-way valve in some embodiments of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Heating device; 200. Target workpiece; 110. Base assembly; 111. Support plate; 112. Base plate; 113. Support frame; 114. Buckle; 120. Cover; 121. Receiving cavity; 130. Eddy current heating assembly; 131. First electromagnetic heating coil; 132. Second electromagnetic heating coil; 140. Controller; 150. First lifting unit; 160. Vacuum assembly; 161. Evacuation pipeline; 1611. First end; 1612. Second end; 162. Vacuum pump; 163. Evacuation valve; 164. Vacuum gauge; 170. Vacuum breaker valve; 180. Multi-port valve; 181. First connecting valve port; 182. Second connecting valve port; 183. Third connecting valve port; 184. Fourth connecting valve port. Detailed Implementation

[0030] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0031] 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 this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0032] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0033] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0034] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0035] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0036] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0037] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0038] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0039] Perovskite solar cells, also known as perovskite solar cells, are solar cells that utilize perovskite-type organometal halide semiconductors as light-absorbing materials. The working principle of perovskite solar cells is based on the photovoltaic effect. When sunlight shines on a perovskite solar cell, if the photon energy is greater than the material's bandgap, the perovskite material absorbs the photons and generates electron-hole pairs (excitons). These excitons are separated under the influence of a built-in electric field; electrons are transported to the negative electrode, and holes are transported to the positive electrode, forming an electric current and completing the conversion of light energy into electrical energy.

[0040] In the fabrication process of perovskite solar cells, the conductive layer on the substrate needs to be heated to achieve film crystallization. In some embodiments, the conductive layer can be a photoelectric conversion layer on the substrate. The photoelectric conversion layer can be prepared by uniformly coating a perovskite material solution onto the substrate to form a perovskite thin film, and then fixing the film onto the substrate through processes such as drying. The crystallization quality of the perovskite thin film has a significant impact on the performance of the perovskite solar cell.

[0041] In some embodiments, the drying equipment may employ a heating plate with heating rods, placing the substrate with the conductive layer in direct contact with the heating plate. Heat is generated by energizing the heating rods in the heating plate, and then conducted through the heating plate to the substrate via thermal conduction, and from the substrate to the conductive layer, thereby achieving the heating and crystallization of the conductive layer in the perovskite solar cell. However, the physical characteristics of the heating plate and substrate limit the heating rate, and the thermal conduction heating method cannot meet the requirements for rapid heating and precise temperature control. Furthermore, the direct contact and heat transfer between the substrate and the heating plate may cause thermal deformation of the substrate, affecting the crystallization quality of the conductive layer on the substrate, and consequently impacting the performance of the perovskite solar cell.

[0042] To address the aforementioned problems, this application provides a heating device for battery fabrication. The heating device heats a target workpiece with a conductive layer, which is used in battery fabrication. The heating device includes a base assembly, a cover, and an eddy current heating assembly. The base assembly includes a support plate for supporting the target workpiece. The cover is used to dock with the base assembly and, together with the base assembly, defines a cavity for accommodating the target workpiece. The eddy current heating assembly is located within the cavity and is used to heat the conductive layer of the target workpiece. By using alternating current to pass through a coil in real time, an alternating magnetic field is generated. This magnetic field induces eddy currents within the conductive layer to be heated. The flow of these eddy currents generates heat, thereby rapidly heating and crystallizing the conductive layer, improving the heating efficiency and crystallization quality. Furthermore, the eddy current heating method avoids direct contact between the heating element and the target workpiece, effectively preventing damage and deformation caused by direct contact.

[0043] The embodiments of this application disclose a heating device and a battery for preparing batteries, which can be used, but are not limited to, in power generation systems such as centralized photovoltaic power stations, distributed photovoltaic power stations, or building-integrated photovoltaics; they can also be used, but are not limited to, in electrical devices such as vehicles, ships, aircraft, wearable devices, or mobile charging devices; and they can also be used, but are not limited to, in energy storage systems or energy systems that combine energy storage or energy conversion devices such as batteries (e.g., lithium batteries) and fuel cells (e.g., hydrogen fuel cells).

[0044] This application provides a heating device for preparing perovskite solar cells, combined with... Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the structure of a heating device for preparing perovskite solar cells according to some embodiments of this application; Figure 2 for Figure 1 A magnified view of part A in the middle.

[0045] The target workpiece 200 includes a conductive layer. The heating device 100 includes a base assembly 110, a cover 120, and an eddy current heating assembly 130. The base assembly 110 includes a support plate 111 for supporting the target workpiece 200. The cover 120 is used to dock with the base assembly 110 and together with the base assembly 110 defines a receiving cavity 121 for accommodating the target workpiece 200. The eddy current heating assembly 130 is located in the receiving cavity 121 and is used to heat the conductive layer of the target workpiece 200.

[0046] Target workpiece 200 is an intermediate transitional workpiece used to fabricate a battery, such as a workpiece obtained after the conductive layer has been fabricated on a substrate. The battery fabricated using target workpiece 200 can be, for example, a perovskite battery, or any battery requiring processing with a conductive layer. For ease of explanation, the following description uses target workpiece 200 for fabricating a perovskite battery as an example. The substrate of a perovskite battery has multiple layered structures, including an ITO layer, a hole migration layer, a hole transport layer, a perovskite layer, an electron transport layer, etc. The conductive layer of target workpiece 200 can be any conductive layer coated on the substrate surface, such as a hole transport layer or a photoelectric conversion layer formed from a perovskite solution.

[0047] It should be noted that the heat source for the heating and crystallization of the coating structure can include external heat transfer or its own heat generation. For example, after the perovskite solution is coated, the coated layer is a perovskite layer. When heated by eddy current, the original ITO layer, hole migration layer, and hole transport layer on the substrate generate heat under the influence of the magnetic field. This heat is transferred to the perovskite layer for the crystallization of the perovskite solution, resulting in the formation of a perovskite thin film. Simultaneously, the perovskite layer itself, being conductive, also generates heat under the influence of the magnetic field, further contributing to the formation of the perovskite thin film. For ease of explanation, the following description will use the conductive layer of the target workpiece 200 as an example, assuming it is a perovskite layer.

[0048] The base assembly 110 is the bottom structure of the heating device 100, which is used to support other components of the heating device 100. The base assembly 110 may be a three-dimensional frame structure, a box structure, a flat plate structure, etc. The specific structure is not limited in this embodiment.

[0049] The base assembly 110 includes a support plate 111, which can be a flat plate structure of any shape, such as a circular plate, a square plate, etc. The support plate 111 may include an upper surface and a lower surface arranged opposite to each other. The upper surface is used to support the target workpiece 200, and the lower surface is used to connect with other structures of the base assembly or other components of the heating device 100.

[0050] The cover 120 is the top structure of the heating device 100. The cover 120 can be a concave structure used to mate with the base assembly 110, forming a receiving cavity 121 capable of accommodating the target workpiece 200. It is understood that at least one of the cover 120 and the base assembly 110 may have a cavity, so that after mating, they can form a closed receiving cavity 121, which can be used to accommodate the target workpiece 200 to be heated. The specific structure of the cover 120 is not limited, as long as it cooperates with the base assembly 110 to form the receiving cavity 121.

[0051] The mating of the cover 120 and the base assembly 110 means that the cover 120 and the base assembly 110 fit together to form the receiving cavity 121. The mating method can be any feasible connection method, such as threaded connection, snap-fit, etc., or it can be a press-fit under pressure. The specific connection method is not limited in this embodiment. For scenarios requiring sealing, the mating position of the two can also have a corresponding sealing structure, such as a sealing ring.

[0052] The eddy current heating assembly 130 is a component used to provide a heat source for heating the conductive layer of the target workpiece 200. The eddy current heating assembly 130 can generate eddy currents inside the conductive layer to achieve heating. In some embodiments, the eddy current heating assembly 130 includes an electromagnetic coil. By providing an alternating current to the electromagnetic coil, an alternating magnetic field is generated around the electromagnetic coil. The alternating magnetic field induces eddy currents inside the conductive layer to be heated, thereby generating heat and heating the conductive layer to crystallize.

[0053] The eddy current heating assembly 130 is installed within the receiving cavity 121, ensuring that the magnetic field lines of the alternating magnetic field can pass through the conductive layer of the target workpiece 200. Furthermore, the receiving cavity 121 provides a sealed, insulated environment for heating the conductive layer, thereby reducing heat loss and improving heating efficiency.

[0054] In some embodiments, the intensity of eddy currents in the conductive layer can be adjusted by controlling the magnitude of the current passing through the electromagnetic heating coil or the frequency of the alternating current, thereby enabling more precise control over the heating rate or temperature of the conductive layer of the target workpiece 200.

[0055] By using alternating current to pass through a coil in real time, an alternating magnetic field is generated. This magnetic field induces eddy currents within the conductive layer, thereby heating and crystallizing the conductive layer of the target workpiece 200. Adjusting the magnitude and frequency of the current allows for rapid heating and cooling of the conductive layer, effectively controlling the crystallization rate and improving its quality. Furthermore, the eddy current heating method avoids deformation of the glass structure in the substrate, which could affect the deformation of the target workpiece 200, thus helping to protect the quality and integrity of the conductive layer surface.

[0056] According to some embodiments of this application, such as Figure 1 and Figure 2 As shown, the eddy current heating assembly 130 includes a first electromagnetic heating coil 131, which is supported by a support plate 111, and the first electromagnetic heating coil 131 and the target workpiece 200 are located on the same side of the support plate 111.

[0057] The first electromagnetic heating coil 131 and the target workpiece 200 are located on the same side of the support plate 111, for example, both on the same side of the upper surface of the support plate 111. In some embodiments, the upper surface of the support plate 111 can simultaneously support the first electromagnetic heating coil 131 and the target workpiece 200. The first electromagnetic heating coil 131 and the support plate 111 can be connected or fixed in any feasible manner; for example, the first electromagnetic heating coil 131 can be fixed to the upper surface of the support plate 111 by a snap-fit.

[0058] The target workpiece 200 can be arranged around the first electromagnetic heating coil 131 in any feasible manner, so that the magnetic field lines of the alternating magnetic field can pass through the conductive layer of the target workpiece 200, thereby generating heat in the conductive layer.

[0059] The number of first electromagnetic heating coils 131 can be one or more, and this application embodiment does not limit the number.

[0060] By setting the first electromagnetic heating coil 131 and the target workpiece 200 on the same side of the support plate 111, the space occupied in the vertical direction is reduced, the space utilization rate is improved, and the installation and maintenance of the first electromagnetic heating coil 131 are also facilitated. At the same time, the distance between the first electromagnetic heating coil 131 and the target workpiece 200 is shortened, which is conducive to improving the heating efficiency.

[0061] According to some embodiments of this application, such as Figure 1 and Figure 2 As shown, the first electromagnetic heating coil 131 has a spiral structure and extends away from the support plate 111. The target workpiece 200 is located in the cavity formed by the first electromagnetic heating coil 131.

[0062] The first electromagnetic heating coil 131 is configured as a spiral structure, such as a spiral tube structure. One end of the spiral tube is connected to the support plate 111, and the other end extends away from the support plate 111. In some embodiments, the extension direction of the first electromagnetic heating coil 131 is perpendicular to the upper surface of the support plate 111, for example, it can extend in a vertical direction.

[0063] The hollow structure of the first electromagnetic heating coil 131 forms a cavity surrounded by the coil. The target workpiece 200 can be arranged in this cavity. When current passes through the first electromagnetic heating coil 131, a relatively strong and uniform magnetic field is generated inside the spiral tube. In this way, the conductive layer of the target workpiece 200 can be in a uniform magnetic field, thereby achieving more uniform heating.

[0064] The size of the cavity formed by the first electromagnetic heating coil 131 can be determined according to the size of the target workpiece 200. The inner wall of the cavity defined by the first electromagnetic heating coil 131 can be spaced at a certain distance from the target workpiece 200, such as 5 mm, 10 mm, etc. The number of turns (i.e., the number of turns) of the first electromagnetic heating coil 131 can be determined according to actual needs, such as 5 turns, 10 turns, etc.

[0065] By arranging the first electromagnetic heating coil 131 into a spiral structure, a longer coil can be arranged in a smaller space, improving space utilization and increasing power density and heating efficiency. When the target workpiece 200 is placed within the cavity formed by the spiral structure, the conductive layer of the target workpiece 200 is in a uniform magnetic field. Furthermore, the symmetry of the spiral structure ensures a relatively uniform current distribution across the cross-section of the first electromagnetic heating coil 131. This uniform current distribution helps reduce localized overheating of the first electromagnetic heating coil 131, improving its lifespan and stability. It also enables uniform and efficient heating of the conductive layer, enhancing the crystal quality of the conductive layer of the target workpiece 200.

[0066] Figure 3 This is a schematic diagram of the structure of the second electromagnetic heating coil in some embodiments of this application; Figure 4 This is a schematic diagram of another heating device for preparing perovskite solar cells according to some embodiments of this application.

[0067] According to some embodiments of this application, in conjunction with Figure 3 and Figure 4 As shown, the base assembly 110 also includes a base plate 112, which is located on the side of the support plate 111 facing away from the target workpiece 200 and is spaced apart from the support plate 111; the eddy current heating assembly 130 includes a second electromagnetic heating coil 132, which is located between the base plate 112 and the support plate 111.

[0068] The base assembly 110 includes a support plate 111 and a base plate 112, with a cavity between the support plate 111 and the base plate 112. The support plate 111 can be movably or fixedly connected to the base plate through a connecting structure.

[0069] The second electromagnetic heating coil 132 is located in the cavity between the support plate 111 and the base plate 112. In some embodiments, the second electromagnetic heating coil 132 can be connected and fixed to the support plate 111 or to the base plate 112. The specific connection method is not limited in this application embodiment.

[0070] The number of second electromagnetic heating coils 132 can be one or more, and this application embodiment does not limit the number.

[0071] In some embodiments, the heating device 100 may simultaneously include a first electromagnetic heating coil 131 located above the support plate 111 and a second electromagnetic heating coil 132 located below the support plate 111.

[0072] The second electromagnetic heating coil 132 and the target workpiece 200 are respectively set on both sides of the support plate 111. The structure layout is clear and layered, and there will be no physical contact or interference between the two. This is conducive to quickly picking up or placing the target workpiece 200 and improving the processing efficiency of the target workpiece 200.

[0073] According to some embodiments of this application, such as Figure 3 and Figure 4 As shown, the second electromagnetic heating coil 132 has a planar spiral structure, and the plane in which the extension direction of the second electromagnetic heating coil 132 is located is parallel to the side surface of the support plate 111 facing away from the target workpiece 200.

[0074] The second electromagnetic heating coil 132 having a planar spiral structure means that the second electromagnetic heating coil 132 extends spirally within a plane, and this plane is parallel to the lower surface of the support plate 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.

[0075] In some examples, the second electromagnetic heating coil 132 can be directly fixed to the lower surface of the support plate 111.

[0076] When current passes through the planar spiral coil, a relatively uniform magnetic field is generated in the planar region above or below it. Since the target workpiece 200 is located above the second electromagnetic heating coil 132, the conductive layer of the target workpiece 200 is situated within this uniform magnetic field. The specific number of turns of the second electromagnetic heating coil 132 can be determined according to actual needs, such as 10 turns, 15 turns, etc.

[0077] By configuring the second electromagnetic heating coil 132 as a planar spiral structure, it can be arranged in a two-dimensional plane, improving space utilization. The planar spiral 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 coil, it can generate a relatively uniform magnetic field in the planar region above or below it. The conductive layer of the target workpiece 200 is in a uniform magnetic field, which can achieve a stable and uniform heating effect and improve the crystal quality of the conductive layer of the perovskite solar cell.

[0078] According to some embodiments of this application, the eddy current heating assembly 130 includes a third electromagnetic heating coil, which is fixedly connected to the inner surface of the cover 120 for forming the receiving cavity 121.

[0079] The third electromagnetic heating coil is fixedly connected to the inner surface of the cover 120. The third electromagnetic heating coil can be in the form of a spiral structure and extend along the height direction of the side wall of the cover 120.

[0080] Understandably, the target workpiece 200 is placed on the support plate 111, and the third electromagnetic heating coil is fixed on the inner surface of the cover 120. When the cover 120 is connected to the base assembly, the third electromagnetic heating coil can surround the outer periphery of the target workpiece 200, or in other words, the target workpiece 200 is located in the hollow area of ​​the third electromagnetic heating coil, so that the third electromagnetic heating coil can heat the target workpiece 200 through an alternating magnetic field. After heating is completed, the third electromagnetic heating coil separates from the base assembly 110 along with the cover 120, and the target workpiece 200 is simultaneously separated from the third electromagnetic heating coil.

[0081] By fixing the third electromagnetic heating coil to the inner surface of the cover 120, the space occupied in the vertical direction is reduced, improving space utilization. At the same time, the third electromagnetic heating coil can also be separated from the target workpiece 200 when the cover 120 is separated from the base assembly 110, so as not to affect the picking or placing of the target workpiece 200, reducing the probability of interference between the third electromagnetic heating coil and the target workpiece 200, and improving the efficiency of heating the target workpiece 200.

[0082] According to some embodiments of this application, the eddy current heating assembly 130 includes a plurality of fourth electromagnetic heating coils; the heating device 100 also includes a controller 140, which is connected to each of the plurality of fourth electromagnetic heating coils and controls the current of each of the plurality of fourth electromagnetic heating coils respectively. The fourth electromagnetic heating coils may include one or more of the first electromagnetic heating coil 131, the second electromagnetic heating coil 132 and the third electromagnetic heating coil in the foregoing embodiments.

[0083] The plurality of fourth electromagnetic heating coils may be a plurality of first electromagnetic heating coils 131, or a plurality of second electromagnetic heating coils 132, or a plurality of third electromagnetic heating coils, or may be a combination of at least two or more of the first electromagnetic heating coils 131, second electromagnetic heating coils 132 and third electromagnetic heating coils in any number.

[0084] The controller 140 is connected to each of the plurality of fourth electromagnetic heating coils and specifically controls the current supplied to the fourth electromagnetic heating coil. The controller 140 controls the current, including controlling the magnitude of the current and / or the frequency of the current.

[0085] For example, the plurality of fourth electromagnetic heating coils are specifically a combination of at least one first electromagnetic heating coil 131 and at least one second electromagnetic heating coil 132, and the controller 140 controls the current of each first electromagnetic heating coil 131 and each second electromagnetic heating coil 132 respectively.

[0086] By setting up multiple fourth electromagnetic heating coils, and controlling each fourth electromagnetic heating coil independently, different numbers and positions of fourth electromagnetic heating coils can be turned on for heating according to actual needs. This can improve the flexibility of heating control of the eddy current heating component and meet the heating and crystallization needs of target workpieces 200 of various specifications.

[0087] According to some embodiments of this application, such as Figure 1 As shown, the heating device 100 also includes a first lifting unit 150, which is connected to the cover 120 and is used to control the lifting of the cover 120 so that the cover 120 can dock with the base assembly 110 to form a receiving cavity 121 or separate from the base assembly 110.

[0088] The first lifting unit 150 is a device for enabling the cover 120 to dock with the base assembly 110 to form a receiving cavity 121 or to separate from the base assembly 110. Any device structure capable of achieving this function meets the requirements of this application. For example, the first lifting unit 150 is a lifting cylinder. The base assembly 110 includes a support frame 113. The body of the lifting cylinder is located within the space surrounded by the support frame 113. The lifting rod of the lifting cylinder extends to contact the cover 120, and the lifting cylinder provides power. Specifically, the lifting cylinder lifts the cover 120 by controlling the lifting rod, causing the cover 120 to move upward and separate from the base assembly 110, so as to facilitate the placement or removal of the target workpiece 200. Subsequently, the lifting cylinder is controlled to lower the cover 120, causing the cover 120 to dock with the base assembly 110 to form a receiving cavity 121.

[0089] By setting up a first lifting unit 150, the connection and separation of the cover 120 and the base assembly 110 are carried out using the first lifting unit 150, which effectively improves the automation level of the heating device 100, saves manpower, and improves the efficiency of batch processing of target workpieces 200.

[0090] According to some embodiments of this application, the heating device 100 further includes a second lifting unit, which is connected to the base assembly 110 and is used to control the lifting of the base assembly 110, so that the base assembly 110 can dock with the cover 120 to form a receiving cavity 121 or separate from the cover 120.

[0091] The second lifting unit is a device for enabling the cover 120 to dock with the base assembly 110 to form a receiving cavity 121 or to separate from the base assembly 110. Any device structure capable of achieving this function meets the requirements of this application. For example, the second lifting unit is a lifting cylinder. The base assembly 110 includes a support frame 113 and a base plate 112. The body of the lifting cylinder is located within the space surrounded by the support frame 113. The lifting rod of the lifting cylinder extends to contact the base plate 112, and the lifting cylinder provides power. Specifically, by controlling the lifting rod of the lifting cylinder, the base plate 112 and the base assembly 110 are lifted, and the base assembly 110 docks and fits with the cover 120 to form a receiving cavity 121. Then, the lifting cylinder is controlled to drive the base plate 112 down, and the cover 120 separates from the base assembly 110 to facilitate the placement or removal of the target workpiece 200.

[0092] By setting up a second lifting unit, the connection and separation of the cover 120 and the base assembly 110 can be carried out, which can effectively improve the automation level of the heating device 100, save manpower, and improve the efficiency of batch processing of target workpieces 200.

[0093] According to some embodiments of this application, the eddy current heating assembly 130 is configured to electromagnetically heat the conductive layer at a rate greater than or equal to 10°C and less than or equal to 140°C per minute.

[0094] The eddy current heating assembly 130 includes an electromagnetic heating coil and a corresponding controller 140. The controller 140 controls the magnitude of the current passing through the electromagnetic heating coil and the frequency of the alternating current to control the heating rate of the conductive layer. The heating rate can be determined according to actual needs, such as 10°C, 20°C, 50°C, 100°C, 140°C per minute, etc., or any value between the above values.

[0095] By controlling the heating rate of the conductive layer electromagnetically heated by the eddy current heating component 130, the crystal quality of the conductive layer of the target workpiece 200 can be improved.

[0096] According to some embodiments of this application, such as Figure 1 As shown, the heating device 100 also includes a vacuum assembly 160, which includes a vacuum pipe 161, a vacuum pump 162, and a vacuum valve 163. The first end 1611 of the vacuum pipe 161 is connected to the receiving cavity 121 through the cover 120; the vacuum pump 162 is connected to the second end 1612 of the vacuum pipe 161; and the vacuum valve 163 is located inside the vacuum pipe 161 and is used to control the connection or disconnection between the first end 1611 and the second end 1612.

[0097] Vacuum assembly 160 is a device for vacuuming the containment cavity 121, providing a vacuum environment as close to ideal as possible. Vacuum assembly 160 includes a vacuum line 161, a vacuum pump 162, and a vacuum valve 163. The vacuum line 161 is used to create a vacuum. An opening is provided on the cover 120. The first end 1611 of the vacuum line 161 communicates with the containment cavity 121 through the opening, and the second end 1612 of the vacuum line 161 is connected to the vacuum pump 162. The vacuum pump 162 is used to create a vacuum environment. The vacuum pump 162 can be installed within the support frame 113 and is used to extract gas from the containment cavity 121. The vacuum valve 163 is a device for controlling the opening and closing of the vacuum line 161. It can be understood as a valve device and is installed on the vacuum line 161. The opening or closing of the valve controls the opening and closing of the vacuum line 161.

[0098] In some embodiments, in order to accurately obtain the vacuum level, the heating device 100 may also include a vacuum gauge 164 for detecting the vacuum level. The vacuum gauge 164 may be fixed inside the receiving cavity 121 or at the position of the pipe interface communicating with the receiving cavity 121.

[0099] By setting up a vacuum component 160, a vacuum environment is provided for the target workpiece 200 to prevent oxidation of the target workpiece 200. At the same time, the volatile solution is quickly extracted to improve the crystal quality of the conductive layer of the target workpiece 200, thereby improving the performance of the perovskite solar cell.

[0100] According to some embodiments of this application, such as Figure 1 As shown, the heating device 100 also includes a vacuum breaker valve 170 for supplying gas to the receiving cavity 121. The vacuum breaker valve 170 includes at least a first interface, a second interface, and a valve core for controlling the opening and closing of the first interface and the second interface. The first interface of the vacuum breaker valve 170 is connected to the receiving cavity 121 through the cover 120, and the second interface is used to communicate with the outside gas.

[0101] Vacuum breaker valve 170 is a valve used to break a vacuum. When the pressure inside the receiving cavity 121 is lower than the external atmospheric pressure, forming a vacuum, vacuum breaker valve 170 can automatically or manually open to allow outside air to enter the receiving cavity 121, thereby balancing the pressure inside and outside the receiving cavity 121. Vacuum breaker valve 170 includes at least a first port and a second port. The first port communicates with the receiving cavity 121 through a cover 120. For example, the cover 120 is provided with an opening, and the first port is fixed to the opening position. The second port is directly connected to the outside. A valve core is provided between the first port and the second port, and the opening or closing of the valve core controls the connection between the first port and the second port.

[0102] By setting up a vacuum breaker valve 170, after drying is completed, the vacuum breaker valve 170 can allow air to slowly enter the cavity 121, so as to avoid damage to some components caused by excessive pressure changes in the cavity 121, and gradually restore the pressure inside the cavity 121 to a level close to the external atmospheric pressure.

[0103] According to some embodiments of this application, in conjunction with Figure 1 and Figure 5 As shown, Figure 5 This is a schematic diagram of the connection between the cover and the multi-way valve in some embodiments of this application.

[0104] The heating device 100 also includes a multi-way valve 180, which includes at least a first connecting valve port 181, a second connecting valve port 182 and a third connecting valve port 183 that are interconnected. The first connecting valve port 181 is connected to the receiving cavity 121 through the cover 120, the second connecting valve port 182 is connected to the first end of the suction pipe 161, and the third connecting valve port 183 is connected to the first interface of the vacuum breaker valve 170.

[0105] The multi-way valve 180 is an intermediate connecting device, and all related devices are connected to the multi-way valve 180, which in turn connects to the receiving cavity 121. The cover 120 has an opening, through which the first connecting valve port 181 connects to the receiving cavity 121. The second connecting valve port 182 connects to the first end of the suction pipe 161, which in turn connects to the receiving cavity 121 via both the second and first connecting valve ports 182 and 181. The third connecting valve port 183 connects to the first interface of the vacuum breaker valve 170, which in turn connects to the receiving cavity 121 via both the third and first connecting valve ports 183 and 181.

[0106] In some embodiments, the multi-way valve 180 further includes a fourth connecting valve port 184, on which a fixed vacuum gauge 174 is mounted. The vacuum gauge 174 can detect the vacuum level in the accommodating cavity 121 through the fourth connecting valve port 184 and the first connecting valve port 181.

[0107] By setting a multi-way valve 180, one of the connecting valve ports of the multi-way valve 180 is connected to the receiving cavity 121, and the other connecting valve ports are connected to the vacuum breaker valve 170 and the suction line 161 respectively. The vacuum breaker valve 170 and the suction line 161 are both connected to the receiving cavity 121 through the multi-way valve 180, which can reduce the number of openings on the cover 120 and facilitate the connection and installation of the vacuum breaker valve 170 and the suction line 161.

[0108] Some embodiments of this application provide a battery manufacturing apparatus, including the heating device described in the above embodiments.

[0109] In some embodiments, such as Figure 1 As shown, the heating device 100 includes a base assembly 110, a cover 120, an eddy current heating assembly 130, a controller 140, a first lifting unit 150, a vacuum assembly 160, a vacuum breaking valve 170, and a multi-way valve 180.

[0110] The base assembly 110 is connected to the cover 120 to form a receiving cavity 121 for accommodating the target workpiece 200. The first lifting unit 150 is connected to the cover 120 and is used to control the lifting of the cover 120, so that the cover 120 can be connected and sealed with the base assembly 110 or separated from the base assembly 110.

[0111] The base assembly 110 includes a support plate 111 and a support frame 113. The eddy current heating assembly 130 includes a first electromagnetic heating coil 131, which extends in a spiral structure away from the support plate 111 and is fixed to the support plate 111 by a snap-fit ​​114. The target workpiece 200 is located within the cavity formed by the spiral structure. The controller 140 controls the heating rate of the first electromagnetic heating coil 131 on the target workpiece 200 to be greater than or equal to 10°C and less than or equal to 140°C per minute.

[0112] The cover 120 has an opening, through which the first connection port 181 of the multi-way valve 180 communicates with the receiving cavity 121. The vacuum assembly 160 includes an evacuation line 161 and a vacuum pump 162, which is also arranged within the space enclosed by the support frame 113. The second connection port 182 of the multi-way valve 180 is connected to the vacuum pump 162 via the evacuation line 161; the third connection port 183 of the multi-way valve 180 is connected to the vacuum breaker valve 170; and a fixed vacuum gauge 174 is mounted on the third connection port 183 of the multi-way valve 180.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A heating device for preparing a battery for heating a target workpiece having an electrically conductive layer, the target workpiece being used for preparing a battery, characterized by, The heating device comprises: a base assembly comprising a support plate for carrying the target workpiece; a cover body for interfacing with the base assembly and defining a receiving cavity with the base assembly for receiving the target workpiece; an eddy current heating assembly located in the receiving cavity, the eddy current heating assembly being configured to heat the conductive layer of the target workpiece.

2. The heating device of claim 1, wherein The eddy current heating assembly comprises a first electromagnetic heating coil carried by the support plate, and the first electromagnetic heating coil and the target workpiece are located on the same side of the support plate.

3. The heating device of claim 2, wherein, The first electromagnetic heating coil extends away from the support plate in a helical structure, and the target workpiece is located in a cavity formed by the first electromagnetic heating coil.

4. The heating device according to any one of claims 1 to 3, characterized in that The base assembly further comprises a bottom plate located on the side of the support plate away from the target workpiece and spaced apart from the support plate; The eddy current heating assembly comprises a second electromagnetic heating coil located between the bottom plate and the support plate.

5. The heating device of claim 4, wherein, The second electromagnetic heating coil has a planar helical structure, and the plane in which the second electromagnetic heating coil extends is parallel to the surface of the side of the support plate away from the target workpiece.

6. The heating device according to any one of claims 1 to 5, characterized in that The eddy current heating assembly comprises a third electromagnetic heating coil fixedly connected to the cover body for forming the inner surface of the receiving cavity.

7. The heating device according to any one of claims 1 to 6, characterized in that The eddy current heating assembly comprises a plurality of fourth electromagnetic heating coils; The heating device further comprises a controller connected to each of the plurality of fourth electromagnetic heating coils and configured to control the current of each of the plurality of fourth electromagnetic heating coils. The fourth electromagnetic heating coil comprises at least one of the first electromagnetic heating coil, the second electromagnetic heating coil and the third electromagnetic heating coil, the first electromagnetic heating coil and the target workpiece are located on the same side of the support plate, the second electromagnetic heating coil and the target workpiece are located on the two sides of the support plate respectively, and the third electromagnetic heating coil is fixedly connected to the cover body for forming the inner surface of the receiving cavity.

8. The heating device according to any one of claims 1 to 7, characterized in that The heating device further comprises a first lifting unit connected to the cover body and configured to control the lifting of the cover body so that the cover body can interface with the base assembly to form the receiving cavity or separate from the base assembly.

9. The heating device according to any one of claims 1 to 8, characterized in that The heating device further comprises a second lifting unit connected to the base assembly and configured to control the lifting of the base assembly so that the base assembly can interface with the cover body to form the receiving cavity or separate from the cover body.

10. The heating device according to any one of claims 1 to 9, characterized in that The eddy current heating assembly is configured to heat the conductive layer at a temperature rise rate of greater than or equal to 10℃ per minute and less than or equal to 140℃ per minute.

11. The heating device according to any one of claims 1 to 10, characterized in that The heating device further comprises a vacuum assembly comprising: an air extraction pipeline, a first end of the air extraction pipeline being in communication with the receiving cavity through the cover body; a vacuum pump in communication with a second end of the air extraction pipeline; an air extraction valve located in the air extraction pipeline and configured to control the communication or disconnection between the first end and the second end.

12. The heating device of claim 11, wherein, The heating device further comprises a vacuum breaking valve for supplying gas into the accommodating cavity, the vacuum breaking valve comprising at least a first port, a second port and a valve core for controlling the opening and closing of the first port and the second port, the first port of the vacuum breaking valve being in communication with the accommodating cavity through the cover, and the second port being in communication with external gas.

13. The heating device of claim 12, wherein, The heating device further comprises a multi-way valve, the multi-way valve comprising at least a first connecting port, a second connecting port and a third connecting port in communication with each other, the first connecting port being in communication with the accommodating cavity through the cover, the second connecting port being connected with the first end of the gas suction pipeline, and the third connecting port being connected with the first port of the vacuum breaking valve.

14. A manufacturing apparatus of a battery, characterized by comprising: The heating device according to any one of claims 1 to 13. The heating device according to any one of claims 1 to 13.

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