Heating device

Abstract

The utility model relates to the technical field of battery production, and discloses a heating device. The heating device comprises at least one heating assembly, an air source and an air inlet pipe, the heating assembly comprises a main body part and an air nozzle, the air nozzle is provided with an air outlet and an air inlet along two sides of a first direction, the air inlet is connected with the main body part, an air inlet cavity is formed in the main body part, and the air nozzle is communicated with the air inlet cavity; the air outlets comprise the first air outlet and the second air outlet, and the size of the first air outlet is larger than that of the second air outlet in the width direction of the tuyere. The heating assembly is at least partially contained in the high-pressure box and used for blowing hot air to the bottom wall of the high-pressure box. Through the application, the limited space in the high-voltage box can be utilized to blow and heat the adhesive layer, the problem of heating and curing of the adhesive layer in a special limited space scene is solved, the air volume is distributed through the tuyere structure, the hot air coverage area is increased, the curing of the bottom adhesive layer is reliably realized, and the production quality and efficiency of the battery device are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery production, in particular to a heating device. BACKGROUND

[0002] New energy batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also increasingly used in the field of energy storage and the like.

[0003] In new energy vehicles equipped with batteries, the batteries can be used to provide power in whole or in part. In the field of energy storage, the batteries can be installed in an energy storage box or directly installed at a user side. In the production scene of the batteries, the bottom of a high-voltage box is fixedly bonded to a battery monomer through a cured adhesive layer. The natural curing of the adhesive layer requires a certain time. With the increasing demand for batteries, the industry is constantly improving the production efficiency of the batteries. Therefore, how to accelerate the curing of the adhesive layer and improve the production efficiency of the batteries is one of the research topics in the industry. CONTENT OF THE INVENTION

[0004] To solve the above technical problems, the present application provides a heating device.

[0005] The present application is implemented through the following technical solutions.

[0006] The present application provides a heating device for heating the bottom wall of a high-voltage box. The heating device comprises at least one heating assembly, an air source and an air inlet pipe. The heating assembly is used for blowing hot air. The heating assembly comprises a main body and a nozzle. The nozzle has an air outlet and an air inlet on both sides in a first direction. The air inlet is connected to the main body. An air inlet cavity is formed in the main body. The nozzle is in communication with the air inlet cavity. The air outlet comprises a first air outlet and a second air outlet. In the width direction of the nozzle, the size of the first air outlet is greater than that of the second air outlet. Two first air outlets are arranged on both sides of the second air outlet in a second direction. The first direction, the second direction and the width direction of the nozzle are perpendicular to each other. The air inlet pipe is in communication with the air source and the main body of each heating assembly. The heating assembly is at least partially accommodated in the interior of the high-voltage box and is used for blowing hot air to the bottom wall of the high-voltage box.

[0007] In the technical scheme of the embodiment of the present application, since the heating assembly is integrated with the air source, at least part of the heating assembly is placed inside the high-pressure box during heating, the heating device can adapt to the limited space in the high-pressure box and heat the adhesive layer, solves the problem of heating and curing under special circumstances (i.e. the other side of the adhesive layer cannot be heated by blowing), and can reliably realize the curing of the bottom adhesive layer, thereby improving the quality and efficiency of battery device production. The heating device is connected to the air source and multiple heating assemblies through the air inlet pipe, and can provide synchronous and stable hot air for all components, thereby improving the overall heating uniformity of the adhesive layer. In addition, since the air outlet includes a first air outlet and a second air outlet, the width of the first air outlet is greater than the width of the second air outlet, and the first air outlet is arranged on both sides of the second air outlet, the air nozzle can guide the hot air to be distributed along the air outlet, the second air outlet can provide a main air flow to cover the middle area in the width direction, and the first air outlet can provide an auxiliary air flow to cover the two side areas in the second direction, thereby realizing the non-uniform distribution of air volume in the air outlet plane. The first air outlet has a relatively small air resistance, so the air flow rate is higher, which is beneficial to supplementing the air volume to the edge area on both sides of the second direction under the guidance of the first air outlet, so that the middle and edge areas can be sufficiently heated, and the adhesive layer area to be heated has a larger coverage area, solving the problem of insufficient edge air volume under a large heating range, and facilitating the heating uniformity of the adhesive layer in the middle and edge areas, improving the uniformity and consistency of the adhesive layer curing, and avoiding the influence of local insufficient curing on the sealing of the battery.

[0008] In some embodiments, along a direction from the air inlet to the air outlet in the first direction, the size of the air nozzle in the second direction gradually increases.

[0009] In the technical scheme of the embodiment of the present application, since the size of the air nozzle in the second direction gradually increases along the first direction, the air nozzle is approximately in the shape of a horn in the second direction, which plays a role in guiding and diffusing hot air, can guide the hot air to gradually spread to both sides in the flow, avoid air flow accumulation, and at the same time make the hot air blown to both sides cover a wider angle and a farther range, further expand the heating area covered by the air nozzle, and reduce the heating dead angle.

[0010] In some embodiments, the main body part includes a plurality of side walls, and the plurality of side walls enclose and define the air inlet cavity.

[0011] In the technical scheme of the embodiment of the present application, since the main body part forms a closed air inlet cavity by the plurality of side walls, it is beneficial for the hot air to flow directionally along the inner wall of the cavity and avoid spreading to the surroundings. When the side walls form a rectangular shape, a larger area of the adhesive layer can be covered in the second direction without moving the heating assembly or arranging more heating assemblies, thereby improving the efficiency of the heating operation, and at the same time, the narrow and long space of the high-pressure box can be adapted.

[0012] In some embodiments, the main body part comprises a cylindrical part and a tapered part, and the tapered part is connected to the air inlet at one end and connected to the cylindrical part at the other end along the first direction.

[0013] In the technical scheme of the embodiments of the present application, since the main body part is provided with the tapered part, the tapered part can concentrate the airflow delivered by the cylindrical part and send it to the air outlet, thereby increasing the wind speed of the hot air and accelerating the curing speed of the adhesive layer. In addition, since the cross-sectional size of the tapered part gradually decreases at the end close to the air nozzle, the front end of the heating assembly as a whole can extend into the narrow gap in the high-pressure box, so that the adhesive layer can be accurately heated, the blind heating area is reduced, and the uniformity and consistency of the curing of the adhesive layer are further improved.

[0014] In some embodiments, the inner diameter of the cylindrical part is in the range of 20mm to 50mm, and / or the included angle between the generatrix of the tapered part and the first direction is in the range of 15° to 45° when the tapered part is projected onto a projection plane perpendicular to the second direction.

[0015] In the technical scheme of the embodiments of the present application, thus, the cylindrical part can not only provide sufficient air volume, but also maintain airflow velocity and reduce heat loss. In addition, the included angle of the tapered part and the maximum inner diameter are in a suitable range, which is conducive to controlling the length of the tapered part along the first direction, better adapting to the narrow space of the high-pressure box, and reducing installation interference.

[0016] In some embodiments, the heating assembly comprises a mesh plate, the mesh plate is provided with a plurality of through holes, and at least part of the air outlet is provided with the mesh plate.

[0017] In the technical scheme of the embodiments of the present application, since the mesh plate provided with a plurality of through holes is installed at the air outlet, the airflow can be dispersed into more uniform microjets, which is conducive to controlling the uniformity of the air outlet, reducing local high-temperature points, improving the uniformity of the heating of the adhesive layer, and improving the overall curing quality of the adhesive layer.

[0018] In some embodiments, along the second direction, the ratio of the size of each first air outlet to the size of the air nozzle is in the range of 0.2 to 0.4.

[0019] In the technical scheme of the embodiments of the present application, since the ratio of the size of the first air outlet to the size of the air nozzle along the second direction is in a suitable range, the heating requirements of the middle region can be considered, and a certain space can be reserved for the first air outlets on both sides, so that the two sides have a wide enough air outlet area. Therefore, it is suitable for adhesive layers of different lengths, and the coverage capability of the entire air nozzle length is maximized.

[0020] In some embodiments, the width of the air nozzle is in the range of 3mm to 10mm along the first direction from the air inlet to the air outlet.

[0021] In the technical scheme of the embodiments of the present application, thus, the air nozzle can take into account the cross-sectional area of the air outlet and the overall size, and can also cover the largest possible heating area, reduce the heating blind area, and save the number of air nozzles used each time.

[0022] In some embodiments, the length of the air nozzle is in the range of 5mm to 20mm along the first direction.

[0023] In the technical scheme of the embodiments of the present application, since the length of the air nozzle along the first direction is in a suitable range, it can not only provide sufficient directional path for the airflow of the first air outlet on both sides, but also control the length of the air nozzle extending out, which is conducive to the air nozzle extending into the high-pressure box and avoiding interference with other components in the high-pressure box, and makes the hot air precisely act on the edges of the adhesive layer on both sides.

[0024] In some embodiments, the first direction and the plane in which the bottom wall of the high-pressure box is located form an angle in the range of 30° to 90°.

[0025] In the technical scheme of the embodiments of the present application, since the first direction and the bottom wall form an angle in a suitable range, the heating assembly can be placed vertically or obliquely, which is suitable for different scenes in the box and improves the flexibility of the arrangement of the heating assembly, so as to optimally match the actual shape and distribution of the adhesive layer. In addition, the heating assembly can be accurately aligned with the bottom wall of the high-pressure box when installed, avoiding the invalid loss of heating caused by the deviation of the hot air injection direction.

[0026] In some embodiments, the heating device comprises a return air plate for covering the opening of the high-pressure box, and the return air plate is provided with at least one return air outlet, and the sum of the opening areas of the return air outlets is not less than the sum of the opening areas of the air outlets and not more than 1.5 times the sum of the opening areas of the air outlets.

[0027] In the technical scheme of the embodiments of the present application, since the return air plate and the heating assembly establish a controllable air circulation, dry hot air is continuously introduced and humid low-temperature air is discharged, so that a stable and efficient heating environment can be created in the high-pressure box, which not only accelerates the curing process, but also reduces the curing defects caused by heat loss, water vapor retention or local high temperature, and improves the curing quality of the adhesive layer.

[0028] The beneficial effects of the embodiments of the present disclosure include: through the present application, the limited space in the high-pressure box can be used to blow and heat the adhesive layer, the adhesive layer heating and curing problem in the special limited space scene is solved, the air volume is distributed through the air nozzle structure, the hot air coverage area is improved, the curing of the bottom adhesive layer is reliably realized, and the quality and efficiency of the battery device production are improved.

[0029] The above description is only a summary of the technical solutions of the present application, in order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the specification, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0030] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are intended to depict only preferred embodiments of the application, and therefore should not be considered to narrow the scope of the present application in any way. Instead, they are included to provide illustration of the preferred embodiments of the present application. In the drawings:

[0031] Figure 1 Structure schematic view of the air nozzle provided for some embodiments of the present application;

[0032] Figure 2 Structure schematic view of the heating assembly provided for some embodiments of the present application;

[0033] Figure 3 Structure schematic view of the heating assembly provided for some embodiments of the present application;

[0034] Figure 4 Side view of the heating assembly provided for some embodiments of the present application;

[0035] Figure 5 Installation schematic view of the heating device provided for some embodiments of the present application;

[0036] Figure 6 Top view of the heating device provided for some embodiments of the present application;

[0037] Figure 7 For Figure 6 Cross-sectional view at A-A;

[0038] Figure 8 Installation schematic view of the heating assembly provided for some embodiments of the present application;

[0039] Figure 9 Top view of the heating device provided for some embodiments of the present application;

[0040] Figure 10 For Figure 9Cross-sectional view at B-B;

[0041] Figure 11 Structure schematic diagram of mesh plate provided for some embodiments of the present application.

[0042] Reference signs

[0043] 100, heating assembly; 10, main body; 20, tuyere; 21, air outlet; 22, air inlet; 211, first air outlet; 212, second air outlet; 12, side wall; 13, cylindrical portion; 14, tapered portion; 30, mesh plate; 1000, heating device; 300, air source; 400, air inlet pipe; 2000, high-pressure box; 2001, bottom wall; 2002, sheet metal support; 500, air return plate; 510, air return opening; 520, air return pipe; 3000, battery monomer; 4000, adhesive layer. DETAILED DESCRIPTION

[0044] The embodiments of the technical solutions of the present application will be described in detail below with reference to the 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.

[0045] 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 and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the text and the above description of drawings are intended to cover non-exclusive inclusion.

[0046] 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 "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0047] In this text, the reference to "embodiments" means that the specific features, structures or properties described in conjunction with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. The skilled person in the art explicitly and implicitly understands that the embodiments described herein can be combined with other embodiments.

[0048] 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 existing alone, A and B existing together, and B existing alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0049] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like are based on the orientations or positional relationships shown in the drawings, and are merely for the convenience of describing the embodiments of the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed, operated or used in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0050] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connecting", "fixing", and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; or 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.

[0051] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical term "contact" should be understood in a broad sense, which can be direct contact, or contact through an intermediate medium layer, or contact between two objects in contact without interaction force, or contact between two objects in contact with interaction force.

[0052] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "parallel" and "perpendicular" both allow a certain degree of tolerance and / or error, including approximately parallel and approximately perpendicular.

[0053] In the following, the present application will be described in detail.

[0054] At present, new energy batteries are more and more widely used in life and industry. New energy batteries are 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, and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also increasing.

[0055] In the production scene of the battery, the bottom of the high-pressure box is bonded and fixed with the battery monomer through the adhesive layer after curing, and the natural curing of the adhesive layer needs a certain time. With the increasing demand for batteries, the industry's demand for battery production efficiency is also increasing, therefore, how to accelerate the curing of the adhesive layer and thus improve the production efficiency of the battery is one of the research topics in the industry.

[0056] After research and design, one side of the adhesive layer is connected with the battery monomer, which interferes with the blowing of hot air, and the other side is bonded with the bottom wall of the high-pressure box, so blowing and heating can only be done from this side. Considering the heating efficiency, a blowing assembly capable of extending into the interior of the high-pressure box needs to be designed, which can cover a larger heating area after installation in the limited internal space.

[0057] Based on such design concept, the application designs a heating device for heating the bottom wall of the high-pressure box. The heating device comprises at least one heating assembly, an air source and an air inlet pipe. The heating assembly is used for blowing hot air, and the heating assembly comprises a main body and a nozzle. The nozzle has an air outlet and an air inlet on both sides in a first direction, the air inlet is connected with the main body, the main body forms an air inlet cavity, the nozzle communicates with the air inlet cavity; the air outlet comprises a first air outlet and a second air outlet, along the width direction of the nozzle, the size of the first air outlet is larger than that of the second air outlet, two first air outlets are respectively arranged on both sides of the second air outlet along a second direction, the first direction, the second direction and the width direction of the nozzle are perpendicular to each other.

[0058] The air inlet pipe communicates the air source with the main body of each heating assembly; the heating assembly is at least partially accommodated in the interior of the high-pressure box and is used for blowing hot air to the bottom wall of the high-pressure box.

[0059] The heating device can adapt to the limited space in the high-pressure box and heat the adhesive layer, solve the problem of heating and curing in special scenarios, reliably realize the curing of the bottom adhesive layer, and improve the quality and efficiency of battery device production. In addition, since the air outlet includes a first air outlet and a second air outlet, the size of the first air outlet is larger than the size of the second air outlet along the width direction of the air nozzle, and the second air outlet is arranged on both sides of the first air outlet along the second direction, the air nozzle can guide the hot air to be distributed along the air outlet, the first air outlet can provide the main air flow to cover the middle area in the width direction, and the second air outlet can provide the auxiliary air flow to cover the area on both sides in the second direction, thereby realizing the non-uniform distribution of air volume on the air outlet plane. The first air outlet has a larger size and a relatively smaller air resistance, so that the air flow rate is higher, the air volume can be supplemented to the edge area on both sides in the second direction under the guidance of the first air outlet, so that the middle and edge areas can be sufficiently heated, the adhesive layer area to be heated has a larger coverage area, the problem of insufficient air volume in the edge area under large heating range is solved, the adhesive layer is uniformly heated in the middle and edge areas, the uniformity and consistency of the adhesive layer curing are improved, and the influence of local insufficient curing on the sealing of the battery is avoided.

[0060] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0061] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc. The present application is not limited thereto.

[0062] In some embodiments, the battery cell can include a housing. The housing is used to package components such as electrode assemblies and electrolytes. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc.

[0063] For example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or other shapes of battery cells. The prismatic battery cell includes a square battery cell, a blade-shaped battery cell, a multi-prismatic battery, such as a hexagonal prismatic battery, etc. The present application is not particularly limited.

[0064] The emissions from the battery cell mentioned in the present application include but are not limited to: electrolyte, dissolved or split positive and negative electrode sheets, fragments of separator membranes, high-temperature and high-pressure gases generated by reactions, flames, etc.

[0065] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0066] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0067] In some embodiments, the battery apparatus can be a battery pack including a box and one or more battery cell assemblies accommodated in the box.

[0068] As an example, the battery cell assembly can be a battery module, which can be accommodated in the box by fixing the battery module in the box.

[0069] As an example, the battery cell assembly can also be accommodated in the box by directly fixing a plurality of battery cells in the box.

[0070] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery cells and battery apparatuses, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships, and spacecraft, such as aircraft, rockets, space shuttles, and spacecraft.

[0071] Hereinafter, the technical solutions of the present application will be described in detail with reference to the accompanying drawings. Figures 1 to 11 The embodiments of the present application will be described in detail.

[0072] Figure 1 The structure schematic diagram of the tuyere provided for some embodiments of the present application; Figure 2 The structure schematic diagram of the heating assembly provided for some embodiments of the present application; Figure 3 The structure schematic diagram of the heating assembly provided for some embodiments of the present application; Figure 4 The side view of the heating assembly provided for some embodiments of the present application; Figure 5 The installation schematic diagram of the heating device provided for some embodiments of the present application; Figure 6 The top view of the heating device provided for some embodiments of the present application; Figure 7 The structure schematic diagram of the tuyere provided for some embodiments of the present application; Figure 6 The cross-sectional view at A-A in FIG. 8; Figure 8A schematic view of the installation of the heating assembly according to some embodiments of the present application; Figure 9 A top view of the heating device according to some embodiments of the present application; Figure 10 A schematic view of the structure of the mesh plate according to some embodiments of the present application. Figure 9 A sectional view along B-B in FIG. 8; Figure 11 A schematic view of the structure of the mesh plate according to some embodiments of the present application.

[0073] In some embodiments of the present application, a first direction, a second direction and a width direction of the tuyere (hereinafter referred to as the width direction) are set for the purpose of illustration. The directions of the first direction, the second direction and the width direction are directions intersecting with each other, and here, the directions intersecting with each other include directions perpendicular to each other. For the purpose of understanding the embodiments of the present application, in the embodiments shown in FIGS. 1 to 11, the first direction, the second direction and the width direction are directions perpendicular to each other, but it should be understood by those skilled in the art that the embodiments of the present application are not limited to the case where the three directions are perpendicular to each other. For the purpose of illustration, as shown by the arrows in FIGS. 1 to 11, the direction of the arrow Z is the first direction, the direction of the arrow Y is the second direction, and the direction of the arrow X is the width direction.

[0074] The embodiments of the present application provide a heating device 1000 for heating the bottom wall 2001 of a high-pressure box 2000. In the embodiments of the present application, the heating device 1000 comprises at least one heating assembly 100, an air source 300 and an air inlet pipe 400.

[0075] The heating assembly 100 is used for blowing hot air. In the embodiments of the present application, as shown in FIGS. 2 to 5, the heating assembly 100 comprises a main body part 10 and a tuyere 20. The tuyere 20 has an air outlet 21 and an air inlet 22 on both sides along a first direction (Z). The air inlet 22 is connected to the main body part 10. An air inlet cavity is formed in the main body part 10, and the tuyere 20 communicates with the air inlet cavity. The air outlet 21 comprises a first air outlet 211 and a second air outlet 212. Along the width direction (X) of the tuyere 20, the size of the first air outlet 211 is greater than the size of the second air outlet 212. Two first air outlets 211 are arranged on both sides of the second air outlet 212 along a second direction (Y). The first direction (Z), the second direction (Y) and the width direction (X) of the tuyere 20 are perpendicular to each other. Figure 2 、 Figure 3

[0076] The air inlet pipe 400 communicates the air source 300 with the main body part 10 of each heating assembly 100. The heating assembly 100 is configured to be at least partially accommodated in the interior of the high-pressure box 2000 and is used for blowing hot air to the bottom wall 2001 of the high-pressure box 2000.

[0077] ​It should be noted that the high-voltage box 2000, also known as a high-voltage power distribution box or PDU, is a high-voltage power distribution unit. In an electrical device such as a vehicle, it has the functions of distributing high-voltage direct current, overload / short circuit protection, leakage protection, overcurrent / overvoltage protection, signal acquisition (such as voltage, current, temperature), etc.

[0078] It should be noted that the high-voltage box 2000 in the embodiments of the present application refers to the high-voltage box body, which can accommodate functional units such as connectors, contactors / relays, resistors, sensors, and conductive parts. However, in the heating process of the embodiments of the present application, the above-mentioned functional units are not installed in the box body.

[0079] It should be noted that the heating device 1000 is used to heat the high-voltage box 2000. As shown in Figure 5 、 Figure 7 、 Figure 8 、 Figure 10 The bottom wall 2001 of the high-voltage box 2000 serves as the box body of the battery monomer 3000 (other parts of the box body are omitted in the figure), and the battery monomer 3000 is fixed to the box body (i.e. the bottom wall 2001 of the high-voltage box 2000) through an adhesive layer 4000, i.e. the adhesive layer 4000 is located between the battery monomer 3000 and the bottom wall 2001 of the high-voltage box 2000. As can be seen from the figure, the adhesive layer 4000 cannot be accelerated by blowing and heating on the side (lower side) of the battery monomer 3000. To solve this technical problem, the heating device 1000 designed in the embodiments of the present application can blow and heat on the side (upper side) of the bottom wall 2001 of the high-voltage box 2000. By partially or completely inserting the heating assembly 100 into the high-voltage box 2000, blowing and heating on the bottom wall 2001 of the high-voltage box 2000 is realized, and heat is transferred to the adhesive layer 4000 through heat conduction to accelerate the solidification of the adhesive.

[0080] Optionally, the battery monomer 3000 is placed upside down, and the bottom of the shell is bonded to the bottom wall 2001 of the high-voltage box 2000 through the adhesive layer 4000.

[0081] Optionally, the adhesive layer 4000 can be a certain thickness of adhesive layer formed by epoxy resin adhesive, polyurethane adhesive, or heat-conducting adhesive.

[0082] It can be understood that the heating device 1000 is a system comprising at least one heating assembly 100, an air source 300, and an air inlet pipe 400. In other embodiments, the heating device 1000 can also include a support (for supporting the heating assembly 100 and the air inlet pipe 400), a temperature measuring assembly, an air return assembly, a waste heat recovery assembly, etc. The embodiments of the present application do not limit this.

[0083] It can be understood that the air source 300 is a power source for providing hot air to the heating assembly 100, which can be an electric heating fan or a hot air furnace, and can output hot air with stable temperature and pressure.

[0084] Optionally, the pressure of the air source 300 can be adjusted.

[0085] It can be understood that the air inlet pipe 400 is a pipeline connecting the air source 300 and the main body part 10 of the heating assembly 100, and can transmit the hot air output by the air source 300.

[0086] Optionally, the material of the air inlet pipe 400 can be a high polymer material, a composite material or a metal. The embodiments of the present application do not limit this.

[0087] Optionally, the embodiments of the present application do not limit the shape, length and inner diameter size of the air inlet pipe 400, which can be designed according to the specific use scenario.

[0088] Exemplarily, as shown in Figure 7 , Figure 8 , Figure 9 , the heating assembly 100 is entirely accommodated in the high-pressure box 2000, and the heating assembly 100 includes the cylindrical part 13, the conical part 14 and the air nozzle 20. The sheet metal support 2002 is arranged in the high-pressure box 2000 and can support the heating assembly 100, so that the air nozzle 20 stably blows out hot air toward the bottom wall 2001. The distance between the air nozzle 20 and the bottom wall 2001 can be 2-5 mm, so as to realize direct heating of the bottom wall 2001.

[0089] Exemplarily, as shown in the figure, the air source 300 and the air inlet pipe 400 are omitted in the figure, the heating assembly 100 includes the air nozzle 20 and the parallel plate-shaped main body part 10, and part of the main body part 10 is accommodated in the high-pressure box 2000. The main body part 10 can form an angle of 30° to 90° with the bottom wall 2001 of the high-pressure box 2000, so as to optimize the heat transfer efficiency of the hot air convection.

[0090] Optionally, the heating assembly 100 can be connected to at least one air inlet pipe 400. Specifically, the air source 300 and the air inlet pipe 400 can be provided in three, arranged along the second direction (Y), and the hot air is introduced into the parallel plate-shaped main body part 10.

[0091] Optionally, the heating device 1000 can include two kinds of heating assemblies 100, i.e. the heating assembly 100 with the cylindrical part 13 and the heating assembly 100 with the parallel plate structure. The combination of multiple heating assemblies 100 can improve the heating efficiency and reduce the heating blind area.

[0092] In the technical scheme of the embodiment of the present application, since the heating assembly 100 is integrated with the air source 300 and part of the heating assembly 100 is arranged inside the high-pressure box 2000, the heating device 1000 can heat the adhesive layer 4000 by using the limited space inside the high-pressure box 2000, thereby solving the problem of heating and curing in a special scenario (i.e., the other side of the adhesive layer 4000 cannot be heated by blowing) and reliably realizing the curing of the bottom adhesive layer 4000, thereby improving the quality and efficiency of battery device production. In addition, the heating device 1000 is connected to the air source 300 and the plurality of heating assemblies 100 through the air inlet pipe 400, and can provide synchronous and stable hot air for all assemblies, thereby improving the overall heating uniformity of the adhesive layer 4000.

[0093] It can be understood that the main body part 10 is a transition structure of the heating assembly 100 for forming an air inlet cavity and connecting an external ventilation pipe and the air nozzle 20, can receive air flow from the air inlet pipe 400 and stably guide the air flow to the air nozzle 20, and can provide a stable transmission channel for the hot air.

[0094] Optionally, the main body part 10 can form a hollow air inlet cavity inside, and the shape can be a circular cylinder, a square cylinder or a parallel plate slit.

[0095] Optionally, the material of the main body part 10 can be a high polymer, a metal or a composite material.

[0096] Exemplarily, the material of the main body part 10 can be an aluminum alloy.

[0097] It can be understood that the air nozzle 20 is a terminal component of the heating assembly 100, surrounded by a plurality of wall surfaces, and can be connected to the main body part 10. The air nozzle 20 has a certain width, can direct the air flow to be sprayed in a specific form, and can control the distribution of the hot air.

[0098] Exemplarily, the air nozzle 20 divides the hot air of the air inlet cavity to the middle and both sides of the air nozzle 20 through the first air outlet 211 and the second air outlet 212.

[0099] Exemplarily, the air nozzle 20 can be detachably connected to the main body part 10, such as threaded connection, buckle connection or flange connection. A sealing ring can be arranged at the connection position to prevent the hot air from leaking from the gap.

[0100] Exemplarily, the air nozzle 20 can be integrally formed with the main body part 10, thereby reducing the processing difficulty.

[0101] It can be understood that the first direction (Z) refers to the main flow direction of the air flow in the main body part 10 and the air nozzle 20, i.e., the direction from the air inlet 22 to the air outlet 21 in the air nozzle 20.

[0102] It can be understood that the second direction (Y) is perpendicular to the first direction (Z) and the width direction (X) of the air nozzle 20. When the air nozzle 20 is rectangular, the second direction (Y) is the length direction thereof.

[0103] It can be understood that the first air outlet 211 refers to the part of the air outlet 21 with a larger size on both sides of the length direction, which can provide a larger flow cross-sectional area, thereby guiding more airflow and heat flow to cover the edge area on both sides.

[0104] Optionally, the edge of the first air outlet 211 can be provided with a rounded corner to avoid vortex of hot air at the corner of the air outlet 21.

[0105] Optionally, the inside of the first air outlet 211 (i.e. the inner side of the wall of the air nozzle 20) can be provided with a reinforcing rib to further improve the airflow guiding capability and also prevent deformation of the air outlet 21 caused by long-term impact of hot air.

[0106] It can be understood that the second air outlet 212 refers to the part of the air outlet 21 with a smaller size in the middle. Its function is to maintain the basic air volume of the middle area, and together with the first air outlet 211 to form a complete air outlet plane.

[0107] Optionally, the size of the second air outlet 212 along the second direction (Y) can be equal to, higher than or lower than that of the first air outlet 211. The size ratio of the two can be designed according to the specific heating requirements.

[0108] Optionally, a partition can be provided between the first air outlet 211 and the second air outlet 212, or not.

[0109] Exemplarily, no partition is provided between the air outlets 21.

[0110] In the technical scheme of the embodiment of the present application, since the air outlet 21 comprises the first air outlet 211 and the second air outlet 212, the width of the first air outlet 211 is greater than the width of the second air outlet 212, and the first air outlet 211 is arranged on both sides of the second air outlet 212 along the second direction (Y), the air nozzle 20 can guide the hot air to be distributed along the air outlet 21, the second air outlet 212 can provide a main air flow covering the middle area in the width direction (X), and the first air outlet 211 can provide an auxiliary air flow covering the two side areas in the second direction (Y), thereby realizing the non-uniform distribution of the air volume in the plane of the air outlet 21. The size of the first air outlet 211 is relatively large, the air resistance is relatively small, the flow rate of the air volume is higher, the air volume can be supplemented to the edge areas on both sides in the second direction (Y) under the guidance of the first air outlet 211, the middle and edge areas can be sufficiently heated, the adhesive layer area to be heated with a larger coverage area can be covered, the problem of insufficient air volume in the edge area under a large heating range is solved, the adhesive layer is uniformly heated in the middle and edge areas, the uniformity and consistency of the curing of the adhesive layer are improved, and the sealing of the battery is affected by the insufficient local curing.

[0111] In the embodiment of the present application, along the first direction (Z) and from the air inlet 22 to the air outlet 21, the size of the air nozzle 20 along the second direction (Y) gradually increases.

[0112] Optionally, the air nozzle 20 forms a horn-shaped or diffuser-shaped flow guide channel.

[0113] Exemplarily, the size of the air nozzle 20 can be linearly gradually increased, so that the air nozzle 20 forms a quadrangular frustum shape.

[0114] Exemplarily, the size of the air nozzle 20 can be linearly gradually increased, so that the air nozzle 20 forms a quadrangular frustum shape.

[0115] Optionally, the linearly gradually increased size can adopt linearly gradual change or stepwise gradual change.

[0116] Exemplarily, as shown in Figure 1 , the size of the air nozzle 20 can be exponentially curvedly gradually changed. The two outer walls along the second direction (Y) are outwardly expanded away from the second air outlet 212.

[0117] In the technical scheme of the embodiment of the present application, since along the first direction (Z), the size of the air nozzle 20 along the second direction (Y) gradually increases, the horn-shaped air nozzle 20 structure plays a flow guiding and diffusing role on the hot air, can guide the hot air to gradually diffuse to both sides in the flow, avoids air flow accumulation, and makes the hot air blown to both sides cover a wider angle and a farther range, further expands the heating area that can be covered by the air nozzle 20, and reduces the heating dead angle.

[0118] In the embodiments of the present application, the main body 10 comprises a plurality of side walls 12, which enclose to define an air inlet cavity.

[0119] It can be understood that the main body 10 is formed by plate splicing or integrated forming into a tubular structure with a specific cross section.

[0120] It can be understood that the number of side walls 12 is determined according to the shape of the main body 10, such as a cuboid main body 10 having 4 side walls 12, a triangular prism main body 10 having 3 side walls 12; or more, such as 6 side walls 12 forming a hexagonal prism-shaped main body 10 to increase structural strength.

[0121] It can be understood that when the main body 10 is in the shape of a cylinder, it has 1 side wall 12, which can define the space of the air inlet cavity and guide the airflow.

[0122] Optionally, the adjacent side walls 12 can be connected by welding, riveting or bending process to ensure the sealing of the air inlet cavity.

[0123] Exemplarily, as shown in Figure 2 , the 4 side walls 12 can also form a parallel plate-shaped main body 10, in which two side walls 12 are larger in area and parallel to each other.

[0124] In the technical scheme of the embodiments of the present application, since the main body 10 is formed by a plurality of side walls 12 to enclose a closed air inlet cavity, it is beneficial for the hot air to flow along the inner wall of the cavity in a directional manner, avoiding diffusion to the surrounding. When the side walls 12 enclose a cuboid shape, a larger area of adhesive layer can be covered in the second direction (Y), without the need to move the heating assembly 100 or set more heating assemblies 100, thereby improving the efficiency of the heating operation, and also adapting to the narrow space of the high-pressure box 2000.

[0125] In the embodiments of the present application, the main body 10 comprises a cylindrical portion 13 and a conical portion 14, and along the first direction (Z), one end of the conical portion 14 is connected to the air inlet 22, and the other end is connected to the cylindrical portion 13.

[0126] It should be noted that the cylindrical portion 13 in the present embodiment refers to a cylinder.

[0127] It can be understood that the cylindrical portion 13 is a cylindrical structure connecting the ventilation pipe and the air source, and the cross section is a circular annular tubular part, which can receive the hot air of the air source and transmit it to the conical portion 14 and the air nozzle 20. The flow channel of the air inlet cavity of the cylinder is uniform, and the airflow resistance is small.

[0128] Optionally, the cylindrical portion 13 can be designed as a cylinder that can be telescoped along the first direction (Z).

[0129] Optionally, the length of the cylindrical portion 13 along the first direction (Z) can be adaptively set according to the use scenario, for example, a smaller size is suitable for short-distance installation or installation in a limited space, and a larger size is suitable for long-distance extension and convenient connection of external ventilation pipes.

[0130] It can be understood that the tapered portion 14 refers to a transition cone with a cross-sectional diameter changing along the first direction (Z), used to connect flow channels with different cross sections, such as the flow channels of the cylindrical portion 13 and the tuyere 20, to realize acceleration or deceleration and transition of the airflow.

[0131] Exemplarily, as shown in Figure 3 , Figure 4 The tapered portion 14 can be located between the cylindrical portion 13 and the air inlet 22 of the tuyere 20, that is, the large end of the tapered portion 14 is connected to the cylindrical portion 13, and the small end is connected to the tuyere 20, which can accelerate the airflow and smoothly guide it into the tuyere 20.

[0132] Optionally, in an embodiment not shown, the tapered portion 14 can also be reversely arranged, that is, the small end is connected to the cylindrical portion 13, and the large end is connected to the tuyere 20, which can decelerate the airflow, increase the static pressure, and make the air outlet of the tuyere 20 more uniform.

[0133] Optionally, the taper of the tapered portion 14 can be set according to the caliber of the tuyere 20, for example, a low taper is suitable for a small-caliber tuyere 20, and a large taper is suitable for a large-caliber tuyere 20.

[0134] It should be noted that the central axis of the tapered portion 14 is consistent with the axis of the cylindrical portion 13 and parallel to the first direction (Z).

[0135] Optionally, the tapered portion 14 and the cylindrical portion 13 can be connected by welding or bonding.

[0136] Alternatively, the tapered portion 14 and the cylindrical portion 13 can be integrally formed, for example, compression molding of a high molecular material.

[0137] Optionally, the tapered portion 14 and the tuyere 20 can be connected by welding or bonding.

[0138] Alternatively, the tapered portion 14 and the tuyere 20 can be integrally formed, for example, compression molding of a high molecular material.

[0139] In the technical scheme of the embodiments of the present application, since the main body portion 10 is provided with the tapered portion 14, the tapered portion 14 can concentrate the airflow delivered by the cylindrical portion 13 to the air outlet 21, thereby increasing the wind speed of the hot air and accelerating the curing speed of the adhesive layer. In addition, since the cross-sectional size of the tapered portion 14 near the tuyere 20 end can be reduced, the front end of the heating assembly 100 can extend into the narrow gap in the high-pressure box 2000, accurately heat the adhesive layer, reduce the heating blind area, and further improve the uniformity and consistency of the curing of the adhesive layer.

[0140] In the embodiments of the present application, the inner diameter of the cylindrical portion 13 is in the range of 20mm to 50mm, and / or, the angle between the generatrix of the conical portion 14 and the first direction (Z) is in the range of 15° to 45°, projected onto a projection plane perpendicular to the second direction (Y).

[0141] It can be understood that the inner diameter refers to the diameter of the flow passage cross section inside the cylindrical portion 13, which can define the size of the flow passage cross section of the hot air in the cylindrical portion 13.

[0142] It can be understood that the angle between the generatrix of the conical portion 14 and the first direction (Z) refers to the angle between the generatrix of the conical portion 14 and the central axis of the conical portion 14. The angle controls the expansion or convergence rate of the airflow, which can be designed according to actual needs.

[0143] Optionally, the inner diameter of the cylindrical portion 13 can be any one of the following values, or a value between any two of these values: 20mm, 22mm, 24mm, 25mm, 26mm, 28mm, 30mm, 32mm, 34mm, 35mm, 36mm, 38mm, 40mm, 42mm, 44mm, 45mm, 46mm, 48mm, 50mm.

[0144] Optionally, the angle can be any one of the following values, or a value between any two of these values: 15°, 18°, 20°, 21°, 24°, 25°, 27°, 30°, 33°, 35°, 36°, 39°, 40°, 42°, 45°.

[0145] In the technical solutions of the embodiments of the present application, thus, the cylindrical portion 13 can not only provide sufficient air volume, but also maintain the flow rate of the airflow and reduce heat loss. In addition, the angle of the conical portion 14 and the maximum inner diameter are in a suitable range, which is conducive to controlling the length of the conical portion 14 along the first direction (Z) and better adapting to the narrow space of the high-pressure box 2000, thereby reducing installation interference.

[0146] It can be understood that the mesh plate 30 is a plate-shaped flow uniformizing member with a plurality of through holes, which is installed at the air outlet 21 of the air nozzle 20. It has a certain thickness and can be arranged at the air outlet 21 of the air nozzle 20, so that the concentrated airflow blown out of the air nozzle 20 is divided and redistributed when flowing through the through holes, thereby achieving uniform air outlet. At the same time, it blocks impurities from entering the air nozzle 20 to some extent.

[0147] Optionally, the installation mode of the mesh plate 30 can adopt a detachable connection mode such as buckle fixing or bolt fixing.

[0148] Alternatively, the mesh plate 30 can be integrally formed with the air nozzle 20.

[0149] Optionally, the mesh plate 30 can be made of stainless steel or high polymer material such as nylon. The embodiments of the present application do not limit this.

[0150] Optionally, the through holes of the mesh plate 30 can be arranged in a matrix side by side or staggered.

[0151] Optionally, the through holes can be circular, square or rhombic in shape.

[0152] Optionally, the diameter of the through holes can be 2 to 10 mm. The distance between the holes (i.e. the distance between the centers of adjacent holes) can be 4 to 20 mm.

[0153] Optionally, the diameter of the through holes can be any one of the following values, or a value between any two of the following values: 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm.

[0154] Optionally, the distance between the holes can be any one of the following values, or a value between any two of the following values: 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm.

[0155] Exemplarily, as shown in FIG. 5, the through holes of the mesh plate 30 are arranged in a matrix side by side, and the through holes are circular. Those skilled in the art should know that the shape, number and distribution of the through holes are not limited to the case shown in the figure. Figure 11

[0156] Optionally, the air nozzle 20 can be provided with multiple mesh plates 30 inside the air outlet 21 along the first direction (Z), and the distance between the mesh plates 30 is 30 to 100 mm.

[0157] Optionally, the distance between the mesh plates 30 is any one of the following values, or a value between any two of the following values: 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm, 80 mm, 85 mm, 90 mm, 95 mm, 100 mm.

[0158] Optionally, the first air outlet 211 or the second air outlet 212 can not be provided with a mesh plate 30.

[0159] Optionally, the first air outlet 211 and the second air outlet 212 are both provided with a mesh plate 30.

[0160] Optionally, one mesh plate 30 can be provided, covering the entire air outlet 21.

[0161] ​Optionally, the plurality of mesh plates 30 are arranged along the second direction (Y) and cover the air outlet 21, for example, the first air outlet 211 or the second air outlet 212.

[0162] In the embodiment of the present application, the heating assembly 100 comprises the mesh plate 30, and the mesh plate 30 is provided with a plurality of through holes, and at least part of the air outlet 21 is installed with the mesh plate 30.

[0163] In the technical scheme of the embodiment of the present application, since the mesh plate 30 provided with a plurality of through holes is installed at the air outlet 21, the airflow can be scattered into more uniform micro jets, which is beneficial to control the uniformity of the air outlet, reduce the local high temperature point, improve the uniformity of the heating of the adhesive layer, and improve the overall curing quality of the adhesive layer.

[0164] In the embodiment of the present application, along the second direction (Y), the ratio of the size of each first air outlet 211 to the size of the air nozzle 20 is in the range of 0.2 to 0.4.

[0165] It should be noted that the length and size described in the embodiment of the present application refer to the size of the inside of the air nozzle 20, that is, the wall thickness of the air nozzle 20 is not limited.

[0166] Optionally, the ratio of the size of each first air outlet 211 to the size of the air nozzle 20 is any one of the following values, or a value between any two of these values: 0.20, 0.22, 0.24, 0.26, 0.28, 0.30, 0.32, 0.34, 0.36, 0.38, 0.40.

[0167] For example, along the second direction (Y), the length of each first air outlet 211 accounts for 0.3, and the length of the middle second air outlet 212 accounts for 0.4.

[0168] In the technical scheme of the embodiment of the present application, since the size of the first air outlet 211 and the second air outlet 212 is in a suitable range, the heating demand of the middle region can be considered, and a certain space is reserved for the two sides, so that the two sides have a large enough air outlet area, thus adapting to adhesive layers of different sizes, and maximizing the heating coverage capability of the entire air nozzle 20.

[0169] In the embodiment of the present application, the width of the air nozzle 20 is in the range of 3mm to 10mm, and along the first direction (Z) and from the air inlet 22 to the air outlet 21, the width of the air nozzle 20 gradually increases.

[0170] Optionally, the specific width of the air nozzle 20 can be any one of the following values, or a value between any two of the values: 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm.

[0171] It can be understood that a smaller air nozzle 20 width (e.g., less than 5mm) can fit a narrow gap in the high-pressure box 2000, and a larger air nozzle 20 width (e.g., 5mm to 10mm) can fit a wider gap without installation interference.

[0172] In the technical solution of the embodiments of the present application, thus, the air nozzle 20 can take into account the cross-sectional area of the air outlet 21 and the overall size, and in addition, can cover the largest possible heating area, reduce the heating blind area, and save the number of air nozzles 20 used each time.

[0173] In the embodiments of the present application, the length of the air nozzle 20 along the first direction (Z) is in the range of 5 to 20mm.

[0174] Optionally, the length of the air nozzle 20 is in the range of 5 to 20mm, and the specific length can be any one of the following values, or a value between any two of the values: 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm.

[0175] It can be understood that a shorter air nozzle 20 length (e.g., 5mm to 10mm) is suitable for short-distance heating and has higher directional accuracy. A longer air nozzle 20 length (e.g., 10mm to 20mm) is suitable for long-distance heating.

[0176] In the technical solution of the embodiments of the present application, since the length of the air nozzle 20 along the first direction (Z) is in the appropriate range, it can provide sufficient directional path for the airflow of the two first air outlets 211, and control the length of the air nozzle 20 extending out, which is conducive to the air nozzle 20 extending into the high-pressure box 2000, avoiding interference with other components in the high-pressure box 2000, and allowing the hot air to act accurately on the edges of the adhesive layer on both sides.

[0177] In the embodiments of the present application, the angle between the first direction (Z) and the plane of the bottom wall 2001 of the high-pressure box 2000 is in the range of 30° to 90°.

[0178] Optionally, the included angle is in the range of 30° to 90°, and the specific length can be any one of the following values or a value between any two of the values: 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°.

[0179] In the technical solution of the embodiment of the application, since the first direction (Z) and the bottom wall 2001 form an included angle in a suitable range, the heating assembly 100 can be placed vertically or obliquely, adapt to different scenarios in the box, and improve the flexibility of arrangement of the heating assembly 100, so as to optimally match the actual shape and distribution of the adhesive layer 4000. In addition, the heating assembly 100 can be accurately aligned with the bottom wall 2001 of the high-voltage box 2000 when installed, so as to avoid invalid loss of heating caused by deviation of the hot air injection direction.

[0180] In the embodiment of the application, the heating device 1000 comprises a return air plate 500, the return air plate 500 is used for covering the opening of the high-voltage box 2000, the return air plate 500 is provided with at least one return air port 510, and the sum of the opening areas of the return air ports 510 is not less than the sum of the opening areas of the air outlets 21 and not more than 1.5 times the sum of the opening areas of the air outlets 21.

[0181] It can be understood that the heating device 1000 comprises at least one air outlet 21 and at least one return air port 510.

[0182] It can be understood that the upper side of the high-voltage box 2000 forms an opening, and the return air plate 500 can cover the opening, reduce the loss of hot air, provide a stable environment for internal heat circulation, stabilize the temperature in the box, and facilitate the curing of the adhesive layer 4000.

[0183] It can be understood that the sum of the opening areas of the air outlets 21 refers to the total sum of the opening areas of all the air outlets 21, and the sum of the opening areas of the return air ports 510 refers to the total sum of the opening areas of all the return air ports 510. The opening area refers to the net flow area.

[0184] Optionally, the ratio of the sum of the areas of the return air ports 510 to the sum of the opening areas of the air outlets 21 can be any one of the following values or a value between any two of the values: 1.00, 1.05, 1.10, 1.15, 1.20, 1.25, 1.30, 1.35, 1.40, 1.45, 1.50.

[0185] Exemplarily, the heating device 1000 comprises one heating assembly 100, the return air plate 500 is provided with one return air port 510, the opening area of the return air port 510 is not less than the opening area of the air outlet 21, and not more than 1.5 times the opening area of the air outlet 21.

[0186] Exemplarily, as shown in FIG. 6, the heating device 1000 comprises two heating assemblies 100, the return air plate 500 is provided with two return air ports 510, the sum of the opening areas of the two return air ports 510 is not less than the sum of the opening areas of the two air outlets 21, and not more than 1.5 times the sum of the opening areas of the two air outlets 21.Figure 5 , Figure 6 As shown in FIGS. 10 and 11, the heating device 1000 includes a plurality of heating assemblies 100, and the return air plate 500 is provided with a return air opening 510, the opening area of the return air opening 510 is not less than the sum of the opening areas of the plurality of air outlets 21, and is not greater than 1.5 times the sum of the opening areas of the plurality of air outlets 21.

[0187] It can be understood that the shape and area of the return air plate 500 and the return air opening 510 are not limited in the present application, and can be designed according to the shape and size of the high-pressure box 2000.

[0188] Optionally, the heating assembly 100 can further include a return air pipe 520 connected with the return air opening 510, for guiding the airflow after drying to export and recycle waste heat.

[0189] Exemplarily, as shown in FIGS. 10 and 11, the return air opening 510 can be provided as a circular opening, and the return air pipe 520 corresponds to the return air opening 510 one by one. Figure 5 , Figure 6 , Figure 7 Exemplarily, as shown in FIGS. 10 and 11, the return air opening 510 can be provided as a circular opening, and the return air pipe 520 corresponds to the return air opening 510 one by one.

[0190] Exemplarily, as shown in FIGS. 10 and 11, the return air opening 510 can be provided as a circular opening, and the return air pipe 520 corresponds to the return air opening 510 one by one. Figure 8 , Figure 9 , Figure 10 Exemplarily, as shown in FIGS. 10 and 11, the return air opening 510 can be provided as a circular opening, and the return air pipe 520 corresponds to the return air opening 510 one by one.

[0191] In the technical scheme of the embodiment of the present application, since the return air plate 500 and the heating assembly 100 establish controllable air circulation, dry hot air is continuously introduced and humid low-temperature air is discharged, so that a stable and efficient heating environment can be created in the high-pressure box 2000, which not only accelerates the curing process, but also reduces curing defects caused by heat loss, water vapor retention or local high temperature, and improves the curing quality of the adhesive layer 4000.

[0192] The specific scheme of the embodiment of the present application will be described below with reference to the accompanying drawings.

[0193] The embodiment of the present application provides a heating assembly 100 for blowing hot air. In specific embodiments, the heating assembly 100 includes a main body part 10 and a nozzle 20, the nozzle 20 has an air outlet 21 and an air inlet 22 on both sides along a first direction (Z), the air inlet 22 is connected with the main body part 10, the main body part 10 is formed with an air inlet cavity, and the nozzle 20 is in communication with the air inlet cavity; the air outlet 21 includes a first air outlet 211 and a second air outlet 212, along the width direction (X) of the nozzle 20, the size of the first air outlet 211 is greater than the size of the second air outlet 212, the first air outlet 211 is arranged on both sides of the second air outlet 212 along a second direction (Y), and the first direction (Z), the second direction (Y) and the width direction (X) of the nozzle 20 are perpendicular to each other.

[0194] The application further provides a heating device 1000 comprising the heating assembly 100, which is used for heating the bottom wall 2001 of the high-pressure box 2000. In some embodiments, the heating device 1000 comprises at least one heating assembly 100, an air source 300, an air inlet pipe 400 and an air return plate 500. The air inlet pipe 400 is connected to the air source 300 and the main body part 10 of each heating assembly 100. The heating assembly 100 is configured to be at least partially accommodated in the interior of the high-pressure box 2000 and is used for blowing hot air to the bottom wall 2001 of the high-pressure box 2000. The heating device 1000 comprises the air return plate 500, which is used for covering the opening of the high-pressure box 2000. The air return plate 500 is provided with at least one air return opening 510. The sum of the opening areas of the air return openings 510 is not less than the sum of the opening areas of the air outlet openings 21 and is not greater than 1.5 times the sum of the opening areas of the air outlet openings 21.

[0195] In specific embodiments, the heating device 1000 further comprises a waste heat recovery module and a control cabinet (containing a temperature sensor). The waste heat recovery module is connected to the air return openings 510 and is used for recovering the waste heat of the drying air flow. The control cabinet can determine whether the temperature rise time of the adhesive layer 4000 meets the process requirements and control the air source 300 to continue blowing hot air or stop heating work.

[0196] The application further provides a heating method, which is used for heating the adhesive layer 4000 outside the bottom wall 2001 of the high-pressure box 2000 by using the heating device 1000. The method specifically comprises the following steps:

[0197] The air source 300 is started, and the waste heat recovery module is operated.

[0198] The air source 300 delivers the hot air generated by the heating bag to the high-pressure box 2000 and sprays the hot air through the air nozzles 20 of the heating assemblies 100.

[0199] The temperature sensor monitors the temperature rise of the adhesive layer 4000, and the control cabinet determines whether the process time requirement is met.

[0200] If the requirement is met, the air source 300 is turned off; otherwise, the heating is prolonged or the parameters are adjusted until the heating is completed.

[0201] Optionally, the air speed at the blowing opening position of the air nozzle 20 is designed to be 5-30 m / s, and the temperature is 80-180℃.

[0202] Optionally, the single heating can be performed for 5-30 minutes.

[0203] Optionally, for the heating assembly 100 in the shape of parallel plates, the normal coverage area of the heating assembly 100 is 10-200 mm, that is, the projection of the heating assembly 100 along the direction of gravity to the plane where the bottom wall 2001 of the high-pressure box 2000 is located has a dimension in the direction perpendicular to the second direction (Y) in the range of 10-200 mm.

[0204] The following describes the heating assembly 100 in the shape of a parallel plate. The vertical distance between the blow nozzle 20 and the raised metal plate at the bottom of the high-pressure box 2000 is set to 5-20 mm to ensure that the hot air is effectively transmitted to the adhesive layer area. The installation angle of the blow nozzle 20 and the bottom wall 2001 of the high-pressure box 2000 is 30-90° to optimize the heat transfer efficiency of the hot air convection. The air return port 510 is arranged at the rear central position of the non-heating area, and the opening area is 1-1.5 times the size of the air outlet to ensure the air circulation efficiency and pressure balance. By adjusting the size of the air return port 510, the leakage of hot air can be effectively prevented, while maintaining the internal air pressure of the system below -20 Pa to avoid the risk of heat loss and structural deformation. The width of the blow nozzle 20 is 3-10 mm, and the taper angle along the width direction (X) of the blow nozzle 20 is 15-30° to optimize the air flow uniformity and pressure distribution. The air outlet 21 has a wind speed range of 5-30 m / s, and the wind temperature is set to 80-180 ℃ to match the adhesive curing process requirements. The wind speed and temperature parameters can be dynamically adjusted according to the actual heat conduction model to improve the heating uniformity and process stability.

[0205] Optionally, the heating assembly 100 can include a tubular part and a conical part 14, the tubular part has a diameter of 20-50 mm, and the angle of the generatrix of the conical part 14 is 15-45°. When the heating device 1000 includes multiple heating assemblies 100, the spacing between adjacent heating assemblies 100 is 30-100 mm. The conical part 14 can be inserted into the metal support 2002 to directly heat the bottom wall 2001 and improve the heat conduction efficiency.

[0206] Optionally, the air outlet 21 can be installed with a mesh plate 30, which has a plurality of through holes with a diameter of 2-10 mm and a spacing of 4-20 mm, and the holes are arranged side by side or staggered. If multiple mesh plates 30 are arranged, the spacing between adjacent plates is 30-100 mm.

[0207] It can be understood that the heating device 1000 includes multiple heating assemblies 100, which cooperate with each other to reduce the dead angle of the heating area and improve the overall heat distribution uniformity.

[0208] If not specifically stated, all embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions.

[0209] If not specifically stated, all technical features and optional technical features of the present application can be combined with each other to form new technical solutions.

[0210] If not otherwise specified, all steps of the application can be performed in any order, preferably in the order as specified. For example, the method comprises steps (a) and (b) means that the method can comprise steps (a) and (b) in the order as specified, or steps (b) and (a) in the order as specified. For example, it is mentioned that the method can further comprise step (c) means that step (c) can be added to the method in any order, for example, the method can comprise steps (a), (b) and (c), or steps (a), (c) and (b), or steps (c), (a) and (b), etc.

[0211] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; even though the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced equivalently; 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 present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claimed subject matter.

Claims

1. A heating device for heating the bottom wall of a high-pressure box, characterized in that, The device includes at least one heating element, an air source, and an air inlet pipe. The heating element is used to blow hot air. The heating element includes a main body and a nozzle. The nozzle has an air outlet and an air inlet on both sides along a first direction. The air inlet is connected to the main body. An air inlet cavity is formed inside the main body, and the nozzle communicates with the air inlet cavity. The air outlet includes a first air outlet and a second air outlet. Along the width direction of the nozzle, the size of the first air outlet is larger than the size of the second air outlet. The two first air outlets are respectively disposed on both sides of the second air outlet along a second direction. The first direction, the second direction, and the width direction of the nozzle are perpendicular to each other. The air inlet pipe connects the air source and the main body of each heating element. The heating element is configured to be at least partially housed inside the high-pressure box and is used to blow hot air onto the bottom wall of the high-pressure box.

2. The heating device according to claim 1, characterized in that, Along the first direction and from the air inlet to the air outlet, the size of the nozzle gradually increases along the second direction.

3. The heating device according to claim 1 or 2, characterized in that, The main body includes multiple sidewalls, which enclose and define the air inlet cavity.

4. The heating device according to claim 1 or 2, characterized in that, The main body includes a cylindrical part and a conical part. Along the first direction, one end of the conical part is connected to the air inlet, and the other end is connected to the cylindrical part.

5. The heating device according to claim 4, characterized in that, The inner diameter of the cylindrical portion is in the range of 20 mm to 50 mm, and / or, when projected along the second direction onto a projection plane perpendicular to the second direction, the angle between the generatrix of the conical portion and the first direction is in the range of 15° to 45°.

6. The heating device according to claim 3, characterized in that, The heating component includes a perforated plate with multiple through holes, and the perforated plate is installed on at least a portion of the air outlet.

7. The heating device according to claim 1 or 2, characterized in that, Along the second direction, the ratio of the size of each of the first air outlets to the size of the air nozzle is in the range of 0.2 to 0.

4.

8. The heating device according to claim 1 or 2, characterized in that, The width of the nozzle is in the range of 3mm to 10mm, and the width of the nozzle gradually increases along the first direction and from the air inlet to the air outlet.

9. The heating device according to claim 1 or 2, characterized in that, Along the first direction, the length of the nozzle is in the range of 5mm to 20mm.

10. The heating device according to claim 1 or 2, characterized in that, The angle between the first direction and the plane containing the bottom wall of the high-voltage box is in the range of 30° to 90°.

11. The heating device according to claim 10, characterized in that, The heating device includes a return air plate for covering the opening of the high-pressure box. The return air plate has at least one return air inlet. The sum of the opening areas of the return air inlets is not less than the sum of the opening areas of the air outlets, and not more than 1.5 times the sum of the opening areas of the air outlets.

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