Battery drying apparatus

Abstract

The application relates to a battery drying device, which comprises a vacuum chamber and at least one heating unit located in the vacuum chamber; the heating unit comprises oppositely arranged contact heating parts and radiation heating parts; the contact heating parts are close to one side of the radiation heating parts and are used for supporting and contact heating of the battery core; and the radiation heating parts are used for radiation heating of the side of the battery core away from the contact heating parts. The battery drying device can improve the heating efficiency, accelerate the overall heating speed of the battery core, and improve the temperature uniformity of the battery core.

Description

Technical Field

[0001] This application relates to the field of battery drying equipment technology, and in particular to battery drying equipment. Background Technology

[0002] In lithium battery manufacturing, battery drying equipment is a crucial moisture removal device. Its core function is to effectively remove moisture from the battery cells by precisely controlling drying environment parameters (such as temperature, vacuum level, and airflow rate). Because water molecules inside lithium batteries can undergo side reactions with the electrolyte, ultimately leading to problems such as rapid capacity decay, shortened cycle life, and increased internal resistance, strict moisture control has become a core quality control aspect in the mass production of power batteries and energy storage batteries.

[0003] Battery drying equipment primarily removes moisture from battery cells through heating and evaporation. However, conventional battery drying equipment has low heating efficiency and poor temperature uniformity when heating battery cells. Utility Model Content

[0004] In view of the above problems, this application provides a battery drying device that can improve the heating efficiency of the battery cell and improve the temperature uniformity of the battery cell.

[0005] One embodiment of this application provides a battery drying device, which includes a vacuum chamber and at least one heating unit located inside the vacuum chamber;

[0006] The heating unit includes a contact heating section and a radiant heating section arranged opposite to each other. The side of the contact heating section closest to the radiant heating section is used to support the battery cell and perform contact heating on the battery cell. The radiant heating section is used to perform radiant heating on the side of the battery cell facing away from the contact heating section.

[0007] In actual use, the battery drying equipment described above places the battery cell on the contact heating section, specifically on the side of the contact heating section closest to the radiant heating section. The contact heating section supports the battery cell and transfers heat to it through contact heating, while the radiant heating section heats the side of the battery cell facing away from the contact heating section using a radiant (i.e., non-contact) heating method. This creates a bidirectional heating mechanism that heats both sides of the battery cell simultaneously. Bidirectional heating allows both sides of the battery cell to be heated at the same time, shortening the heat conduction path, improving heating efficiency, and accelerating the overall temperature rise of the battery cell. Furthermore, the bidirectional heating mechanism effectively reduces the heat difference between the two sides of the battery cell, significantly improving the temperature uniformity of the battery cell.

[0008] In one embodiment, the radiative heating element includes an integrated plate and a plurality of infrared light-emitting elements, which are disposed on the integrated plate and located on the side of the integrated plate close to the battery cell.

[0009] When the infrared light-emitting element is powered on, it can emit infrared light, thereby radiating heat to the side of the battery cell that is away from the contact heating part. This eliminates the need for contact with the battery cell, making it convenient to work together with the contact heating part to form bidirectional heating of the battery cell.

[0010] In one embodiment, the infrared light-emitting element includes an infrared light source and a lens, with the light-incident surface of the lens facing the infrared light source and the light-exiting surface of the lens facing the battery cell. The light-exiting surface of the lens is constructed with multiple light-diffusing microstructures.

[0011] Because the light-emitting surface has multiple light-diffusing microstructures, when infrared light reaches the light-emitting surface of the lens, the infrared light will undergo multiple refractions, reflections and scatterings on the surface of the microstructures. The originally concentrated infrared light is dispersed and shines on the battery cell from the light-emitting surface of the lens in a more divergent form, thereby achieving a more uniform heating effect on the multiple battery cells supported on the contact heating part.

[0012] In one embodiment, an anti-reflective coating is provided on the light-incident surface of the lens. By providing an anti-reflective coating on the light-incident surface of the lens, the reflection loss when infrared light is incident can be reduced, allowing more infrared light to penetrate the lens and act on the battery cell, thereby improving energy utilization.

[0013] In one embodiment, the antireflective coating has a reflectivity of <3% for infrared light emitted by an infrared light source; and / or, the lens has a transmittance of ≥92%.

[0014] The antireflective coating in this embodiment has a reflectivity of <3% for infrared light with wavelengths λ between 2μm and 3μm, thus effectively reducing reflection loss when infrared light with wavelengths λ between 2μm and 3μm is incident. The lens has a transmittance of ≥92%, which helps ensure sufficient infrared energy can pass through and reduces infrared energy loss.

[0015] In one embodiment, the wavelength λ of the infrared light emitted by the infrared light-emitting element satisfies the condition: 3μm≥λ≥2μm.

[0016] By ensuring that the wavelength λ of the infrared light emitted by the infrared light-emitting element meets the condition 3μm≥λ≥2μm, the infrared light can be better matched with the spectral absorption characteristics of the aluminum shell material of the battery cell, which is conducive to the rapid absorption of heat by the aluminum shell of the battery cell and accelerates the heating rate of the battery cell.

[0017] In one embodiment, the battery drying equipment further includes a temperature detection element located within a vacuum chamber and used to detect the temperature of the cell surface.

[0018] Temperature sensors can acquire real-time data on the surface temperature of the battery cells, allowing staff to intuitively monitor the heating status of the cells, control the drying process, reduce cell membrane pores caused by excessively high temperatures, and ensure that the drying effect meets process requirements.

[0019] In one embodiment, the battery drying equipment further includes a control module, which is connected to the temperature detection element and the heating unit respectively, and is used to adjust the heating energy of the heating unit according to the detection result of the temperature detection element.

[0020] The temperature sensing element collects real-time data on the surface temperature of the battery cell and transmits it to the control module. If the surface temperature of the battery cell is higher than the preset value, the control module controls the heating unit to reduce the heating power, thereby slowing down the heating rate of the battery cell and reducing the risk of diaphragm pore blockage.

[0021] In one embodiment, the battery drying equipment includes a row of heating units, or the battery drying equipment includes multiple rows of heating units arranged along a second direction, the second direction intersecting with a first direction, the first direction being the relative direction between the contact heating part and the radiation heating part;

[0022] The heating unit column includes multiple heating units arranged at intervals along a first direction.

[0023] By equipping the battery drying device with at least one column of heating units, the column of heating units comprising multiple heating units spaced apart sequentially along a first direction, more battery cells can be dried simultaneously through multiple heating units, thereby improving drying efficiency.

[0024] In one embodiment, the heating unit is installed in the vacuum chamber; the heating unit has an electrical input interface, the vacuum chamber has an electrical output interface, the electrical input interface and the electrical output interface are electrically connected, and the electrical output interface is used to electrically connect to an external power supply and a control module.

[0025] When the heating unit is installed in the vacuum chamber, its electrical input interface can be electrically connected to the vacuum chamber's electrical output interface. Since the vacuum chamber's electrical output interface is used to connect to an external power supply and control module, the external power supply can power the heating unit through the vacuum chamber's electrical output interface. Simultaneously, the control module can establish a signal connection between the vacuum chamber's electrical output interface and the heating unit's electrical input interface, facilitating the adjustment of the heating energy.

[0026] In one embodiment, the vacuum chamber has two sidewalls facing each other along a second direction. Mounting grooves are provided on the sidewalls, extending along a third direction. One end of a heating unit adjacent to a sidewall is mounted in the mounting groove. The second direction intersects with the first direction, which is the direction opposite to the contact heating element and the radiant heating element. The third direction intersects with both the first and second directions. This facilitates the installation of the heating unit.

[0027] 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

[0028] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of a battery drying device according to some embodiments of this application.

[0030] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle.

[0031] Figure 3 This is a schematic diagram of the structure of a radiant heating element according to some embodiments of this application.

[0032] Figure 4 This is a schematic diagram showing the cooperation relationship between the contact heating element, the battery cell, and the limiting component in some embodiments of this application.

[0033] Figure 5 for Figure 4 A magnified view of a portion of region B in the middle.

[0034] Figure 6 for Figure 4 A schematic diagram of the side of the contact heating element facing away from the battery cell.

[0035] The reference numerals in the detailed embodiments are as follows:

[0036] ZZ', First direction; XX', Second direction; YY', Third direction;

[0037] 10. Battery cells;

[0038] 100. Vacuum chamber; 110. Chamber body; 111. First side wall; 112. Second side wall; 110a. First mounting slot; 110b. Second mounting slot; 120. Chamber door; 121. Observation window;

[0039] 200, Heating unit; 210, Contact heating element; 210a, First electrical input interface; 220, Radiant heating element; 220a, First electrical input interface; 221, Integrated board; 222, Infrared light-emitting element; 230, Limiting component; 231, Limiting rod; 232, Limiting block;

[0040] 300. Temperature detection components. Detailed Implementation

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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).

[0047] 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.

[0048] 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.

[0049] As mentioned in the background section, conventional battery drying equipment has low heating efficiency and poor temperature uniformity when heating battery cells. This is mainly because conventional battery drying equipment relies on the contact between the heating substrate and the bottom of the battery cell for heat transfer. The heat transfer path from the bottom to the top of the cell is relatively long, resulting in a slow overall temperature rise. Furthermore, the significant difference in heat received by the top and bottom of the cell leads to uneven temperature distribution.

[0050] This phenomenon becomes increasingly pronounced, especially as energy storage cells evolve towards larger cell designs and become taller. Furthermore, in some battery products, the explosion-proof valve is located at the bottom of the cell. When the battery drying equipment heats the cell, a clearance area is designed on the heating plate to prevent the explosion-proof valve area from being scratched or damaged, thus avoiding contact between the valve and the heating plate. This reduces the contact area between the bottom of the cell and the heating plate, resulting in a slower cell heating rate and further deterioration of cell temperature uniformity.

[0051] Based on the above problems, this application provides a battery drying device in which a contact heating part supports the battery cell, and the contact heating part and the radiation heating part heat both sides of the battery cell at the same time, which shortens the heat conduction path and accelerates the overall heating speed of the battery cell. At the same time, the bidirectional heating mechanism effectively reduces the heat difference between the two sides of the battery cell and significantly improves the temperature uniformity of the battery cell.

[0052] Figure 1 This is a schematic diagram of the structure of a battery drying device according to some embodiments of this application. Figure 2 for Figure 1 A magnified view of a portion of region A in the middle. Please refer to... Figure 1 and Figure 2 This application provides a battery drying apparatus, which includes a vacuum chamber 100 and at least one heating unit 200 located within the vacuum chamber 100. The heating unit 200 includes a contact heating section 210 and a radiant heating section 220 disposed opposite to each other. The side of the contact heating section 210 near the radiant heating section 220 is used to support a battery cell 10 and perform contact heating on the battery cell 10. The radiant heating section 220 is used to radiate heat the side of the battery cell 10 facing away from the contact heating section 210.

[0053] Specifically, the contact heating element 210 and the battery cell 10 can be in direct contact, or an intermediate heat-conducting element can be provided between them. The two sides of the intermediate heat-conducting element are in contact with the contact heating element 210 and the battery cell 10 respectively, that is, the contact heating element 210 and the battery cell 10 can also be in indirect contact.

[0054] The contact heating element 210 can support the battery cell 10 by directly or indirectly contacting it. That is, the contact heating element 210 can simultaneously support the battery cell 10 and provide contact heating.

[0055] In actual use, the battery drying equipment described above places the battery cell 10 on the contact heating section 210, specifically on the side of the contact heating section 210 closest to the radiant heating section 220. The contact heating section 210 supports the battery cell 10 and transfers heat to it through contact heating. Simultaneously, the radiant heating section 220 radiates (i.e., non-contactly) heats the side of the battery cell 10 facing away from the contact heating section 210, thus forming a bidirectional heating mechanism that heats both sides of the battery cell 10 simultaneously. This bidirectional heating allows both sides of the battery cell 10 to be heated simultaneously, shortening the heat conduction path, improving heating efficiency, and accelerating the overall temperature rise of the battery cell 10. Furthermore, the bidirectional heating mechanism effectively reduces the heat difference between the two sides of the battery cell 10, significantly improving the temperature uniformity of the battery cell 10.

[0056] Especially for the increasingly demanding drying scenarios of large battery cells, the aforementioned battery drying equipment can significantly improve heating efficiency, accelerate the overall heating rate of the battery cell 10, and significantly improve the temperature uniformity of the battery cell 10.

[0057] In addition, even if the side of the battery cell 10 with the explosion-proof valve is supported on the contact heating part 210, the contact heating part 210 reduces the contact area with the battery cell 10 due to the clearance of the explosion-proof valve. The radiant heating part 220 can also make up for the lack of contact heat transfer through non-contact heating, thereby improving the heating efficiency of the battery cell 10 and improving the temperature uniformity of the battery cell 10.

[0058] For ease of description, the orientation is described below using the first direction ZZ', the second direction XX', and the third direction YY'. The first direction ZZ', the second direction XX', and the third direction YY' intersect each other; optionally, they are perpendicular to each other. The first direction ZZ' is the direction in which the contact heating unit 210 and the radiation heating unit 220 are opposite each other. In actual use of the battery drying equipment, the first direction ZZ' can be vertical.

[0059] Figure 3 This is a schematic diagram of the structure of a radiant heating element according to some embodiments of this application. Please refer to... Figure 3 Combination Figure 1 In some embodiments, the radiant heating element 220 includes an integrated plate 221 and a plurality of infrared light-emitting elements 222, which are disposed on the integrated plate 221 and located on the side of the integrated plate 221 close to the battery cell 10.

[0060] Specifically, the integrated board 221 serves as a support carrier for multiple infrared light-emitting elements 222, and the multiple infrared light-emitting elements 222 can be arranged in an orderly manner on the side of the integrated board 221 close to the battery cell 10.

[0061] When the infrared light-emitting element 222 is powered on, it can emit infrared light, thereby radiating heat to the side of the battery cell 10 that is away from the contact heating part 210 without contacting the battery cell 10. This facilitates bidirectional heating of the battery cell 10 in conjunction with the contact heating part 210.

[0062] Optionally, in actual use, the side of the battery cell 10 with the explosion-proof valve can face the radiant heating element 220, while the side of the battery cell 10 away from the explosion-proof valve can be supported on the contact heating element 210. This not only improves the heating rate and temperature uniformity of the battery cell 10 through bidirectional heating, but also eliminates the need for the explosion-proof valve to contact the radiant heating element 220, thus avoiding the need to design an air gap for the explosion-proof valve and preventing collision damage caused by contact.

[0063] When the infrared light-emitting element 222 is powered on, it emits infrared radiation energy, which acts directly on the side of the battery cell 10 facing away from the contact heating part 210 in a non-contact manner. The integrated board 221 can integrate the circuit and control the power supply of the infrared light-emitting element 222, so that each infrared light-emitting element 222 works together to form a radiative heating field facing the back of the battery cell 10, which forms a bidirectional heating combination with the front heating of the contact heating part 210.

[0064] In one embodiment, the infrared light-emitting element 222 is an infrared lamp tube. Multiple infrared lamp tubes are arranged at intervals along the second direction XX'. The length direction of the infrared lamp tubes is along the third direction YY'. This arrangement can form a more uniform radiant heating area, thereby facilitating a more uniform heating effect on the multiple battery cells 10 supported on the contact heating part 210.

[0065] In some embodiments, the contact heating element 210 may be an electrically heated heating substrate. For example, the heating substrate includes a metal shell, inside which a resistance wire is disposed, and an insulating thermally conductive layer is placed between the resistance wire and the metal shell. When the resistance wire is heated, it transfers heat to the metal shell through the insulating thermally conductive layer, thereby transferring heat to the battery cell 10 via the metal shell. The insulating thermally conductive layer also provides insulation protection between the resistance wire and the metal shell. The heating substrate is not limited to this structure and may be other types of heating substrates.

[0066] In one embodiment, the infrared light-emitting element 222 includes an infrared light source and a lens, with the light-incident surface of the lens facing the infrared light source and the light-exiting surface of the lens facing the battery cell 10. The light-exiting surface of the lens is constructed with multiple light-diffusing microstructures.

[0067] Optionally, the light-diffusing microstructure includes micro-protrusions and / or micro-recesses. Optionally, the light-diffusing microstructure includes microprisms.

[0068] Specifically, the infrared light source emits infrared light, which strikes the incident surface of the lens and penetrates the lens to reach the emitting surface. Because the emitting surface has multiple light-diffusing microstructures, when the infrared light reaches the emitting surface of the lens, it undergoes multiple refractions, reflections, and scatterings on the surface of the microstructures. The originally concentrated infrared light is dispersed and emitted from the emitting surface of the lens to the battery cell 10 in a more divergent form, thereby achieving a more uniform heating effect on the multiple battery cells 10 supported on the contact heating unit 210.

[0069] In one embodiment, the light-incident surface of the lens is provided with an anti-reflective coating.

[0070] Anti-reflective coatings include, for example, single-layer magnesium fluoride coatings, multi-layer dielectric coatings (made of alternating deposition of materials with different refractive indices, such as silicon dioxide and titanium dioxide), and nanostructured anti-reflective coatings.

[0071] By setting an anti-reflective coating on the light-incident surface of the lens, the reflection loss when infrared light is incident can be reduced, allowing more infrared light to penetrate the lens and act on the battery cell, thereby improving energy utilization.

[0072] In one embodiment, the wavelength λ of the infrared light emitted by the infrared light-emitting element 222 satisfies the condition: 3μm≥λ≥2μm.

[0073] Optionally, λ can be 2.5μm, 2μm, 3μm, etc.

[0074] By ensuring that the wavelength λ of the infrared light emitted by the infrared light-emitting element 222 meets the condition 3μm≥λ≥2μm, the infrared light can be better matched with the spectral absorption characteristics of the aluminum shell material of the battery cell 10, which is conducive to the rapid absorption of heat by the aluminum shell of the battery cell 10 and accelerates the heating rate of the battery cell 10.

[0075] In one embodiment, the antireflective coating has a reflectivity of less than 3% for infrared light emitted by an infrared light source.

[0076] Specifically, under the premise that the wavelength λ of the infrared light emitted by the infrared light-emitting element 222 meets the condition: 3μm≥λ≥2μm, that is, the anti-reflection film layer in this embodiment has a reflectivity of <3% for infrared light with wavelength λ between 2μm and 3μm, thereby effectively reducing the reflection loss when infrared light with wavelength λ between 2μm and 3μm is incident.

[0077] Understandably, a reflectivity of less than 3% can be achieved through the selection of materials for the anti-reflective coating and the design of the coating combination, which will not be elaborated further.

[0078] In one embodiment, the infrared light-emitting element 222 further includes a lampshade that covers the infrared light source. A lens may be disposed between the infrared light source and the lampshade.

[0079] Specifically, the lens can be mounted on the lampshade.

[0080] By installing a lampshade, the lens and infrared light source can be protected.

[0081] In other embodiments, a separate lampshade may not be required; instead, the lens may be used as the lampshade, meaning the lens and lampshade share the same structure.

[0082] In one embodiment, the lens has a transmittance of ≥92%, which helps to ensure that sufficient infrared energy can pass through and reduce infrared energy loss.

[0083] Understandably, light transmittance ≥92% can be achieved by adjusting the lens material, structure, and the material selection and layer combination of the anti-reflective coating, which will not be elaborated further.

[0084] Please refer to Figure 1 In one embodiment, the vacuum chamber 100 includes a chamber body 110 and a chamber door 120, the chamber door 120 being connected to the side of the chamber body 110 having an opening.

[0085] The chamber door 120 can be opened and closed. When the chamber door 120 is open, the heating unit and the battery cell 10 can be placed into the chamber body 110. Figure 1In the embodiment shown, the chamber door 120 is located on one side of the chamber body 110 along the third direction YY'.

[0086] In one embodiment, a sealing ring is provided between the chamber door 120 and the chamber body 110. The sealing ring can be provided on the chamber body 110 or the chamber door 120. When the chamber door 120 is closed, the sealing ring can seal the interface between the chamber door 120 and the chamber body 110. Understandably, the sealing ring is made of a high-temperature resistant material.

[0087] Please refer to Figure 1 In one embodiment, the chamber door 120 is provided with an observation window 121. During the drying process of the battery cell 10 by the battery drying equipment, the heating status of multiple battery cells 10 can be easily observed through the observation window 121.

[0088] In one embodiment, the observation window 121 is a double-glazed insulated glass unit, which includes a first glass layer and a second glass layer disposed opposite to and spaced apart from each other, and a sealant frame located between the first glass layer and the second glass layer. The two sides of the sealant frame are respectively bonded to the first glass layer and the second glass layer, and the first glass layer, the second glass layer and the sealant frame together define the hollow cavity layer.

[0089] The hollow cavity can be filled with inert gases such as nitrogen.

[0090] By using double-glazed laminated glass as the observation window 121, the heat insulation performance is good, which can reduce the heat loss through the observation window 121 and ensure the drying effect of the battery cell 10.

[0091] Please refer to Figure 1 In one embodiment, the battery drying equipment further includes a temperature detection element 300, which is located inside the vacuum chamber 100 and is used to detect the temperature of the surface of the battery cell 10.

[0092] The temperature sensing element 300 can be a thermocouple, an infrared thermometer, a resistance thermometer, etc. The temperature sensing element 300 can be installed on the inner wall of the vacuum chamber 100, for example, on the chamber door 120 or on the inner wall of the chamber body 110.

[0093] The temperature sensor 300 can acquire the surface temperature data of the battery cell 10 in real time, allowing staff to intuitively grasp the heating status of the battery cell 10, control the drying process, reduce the pore blockage of the battery cell 10 diaphragm caused by excessive temperature, and ensure that the drying effect meets the process requirements.

[0094] In one embodiment, the battery drying equipment further includes a control module, which is signal-connected to the temperature detection element 300 and the heating unit 200 respectively, and is used to adjust the heating energy of the heating unit 200 according to the detection result of the temperature detection element 300.

[0095] The control module can be, for example, a desktop computer, tablet computer, or laptop computer. The control module can be electrically connected to the contact heating unit 210 and the radiant heating unit 220 respectively, so that the heating energy of the contact heating unit 210 and the radiant heating unit 220 can be adjusted separately.

[0096] Temperature sensing element 300 collects real-time surface temperature data of battery cell 10 and transmits it to the control module. If the surface temperature data of battery cell 10 is higher than the preset value, the control module controls heating unit 200 to reduce heating power, thereby slowing down the heating rate of battery cell 10 and reducing the risk of diaphragm pore blockage. The preset value can be stored in the control module in advance and set according to process requirements.

[0097] Figure 4 This is a schematic diagram showing the cooperation relationship between the contact heating element, the battery cell, and the limiting component in some embodiments of this application. Figure 5 for Figure 4 A magnified view of a portion of region A in the middle. (Combined with...) Figure 4 and Figure 5 In one embodiment, the heating unit 200 further includes a limiting component 230, which is disposed on the side of the contact heating part 210 near the radiation heating part 220, and is used to limit the battery cell 10.

[0098] The limiting component 230 is installed on the side of the contact heating part 210 near the radiation heating part 220. It can accurately limit the position of the battery cell 10 and prevent the battery cell 10 from shifting during the use of the battery drying equipment. This is conducive to the uniform heating of each battery cell 10 and reduces the risk of collision damage caused by the shifting of the battery cell 10.

[0099] In one embodiment, the limiting component 230 defines a plurality of cell receiving spaces, each cell receiving space being used to receive a single cell 10. The plurality of cell receiving spaces are arranged in a multi-row, multi-column array along the second direction XX' and the third direction YY', thereby enabling the simultaneous drying of the array of multiple cells 10.

[0100] Combination Figure 4 and Figure 5 In one embodiment, the limiting component 230 includes a plurality of limiting rods 231 arranged in parallel at intervals, and a plurality of limiting blocks 232 arranged at intervals along the length direction on the limiting rods 231.

[0101] In any two adjacent limit rods 231, any two adjacent limit blocks 232 on one limit rod 231 and the other two limit blocks 232 at corresponding positions on the other limit rod 231 together define a cell accommodating space, which is used to accommodate a single cell 10.

[0102] Understandably, the four limiting blocks 232 can define a space for accommodating a battery cell. The four limiting blocks 232 are arranged in a two-row, two-column configuration. Optionally, the length direction of the limiting rod 231 is along the second direction XX', and the arrangement direction of the multiple limiting rods 231 is along the third direction YY'.

[0103] By arranging multiple limiting rods 231 and multiple limiting blocks 232 in this embodiment, multiple battery cell accommodating spaces can be formed in an array arrangement of multiple rows and columns, thereby enabling the simultaneous drying of multiple battery cells 10 arranged in the array.

[0104] When the battery cell 10 enters the drying process, the operator places multiple battery cells 10 in multiple battery cell housing spaces in sequence. The four limit blocks 232 corresponding to each battery cell housing space precisely constrain the corresponding battery cell 10 so that the battery cell 10 is reliably positioned.

[0105] In one embodiment, the battery drying equipment further includes a vacuum generating device connected to the vacuum chamber 100 to create a vacuum environment within the vacuum chamber 100.

[0106] Vacuum-generating devices can be, for example, vacuum pumps.

[0107] When using battery drying equipment, a vacuum device can be used to extract gas from the battery drying equipment in real time to maintain a vacuum state. This not only accelerates the evaporation of moisture from the battery cell and improves drying efficiency, but also isolates oxygen to prevent oxidation of materials inside the battery cell and deterioration of the electrolyte, thus ensuring the performance and quality of the battery cell.

[0108] Please refer to Figure 1 In one embodiment, the battery drying device includes at least one column of heating units, the column of heating units including a plurality of heating units 200 arranged at intervals along a first direction ZZ'.

[0109] By equipping the battery drying device with at least one column of heating units, the column of heating units includes multiple heating units 200 arranged sequentially at intervals along the first direction ZZ', thereby enabling more battery cells 10 to be dried simultaneously through multiple heating units 200, thus improving drying efficiency.

[0110] Please refer to Figure 1 In one embodiment, the battery drying equipment includes a row of heating units.

[0111] In other embodiments, the battery drying device may also include multiple rows of heating units arranged along the second direction XX'.

[0112] In one embodiment, the heating unit 200 is mounted in the vacuum chamber 100. The heating unit 200 has an electrical input interface, and the vacuum chamber 100 has an electrical output interface. The electrical input interface of the heating unit 200 is electrically connected to the electrical output interface of the vacuum chamber 100, and the electrical output interface of the vacuum chamber 100 is used for electrical connection to an external power supply and a control module.

[0113] When the heating unit 200 is installed in the vacuum chamber 100, the electrical input interface of the heating unit 200 can be electrically connected to the electrical output interface of the vacuum chamber 100. Since the electrical output interface of the vacuum chamber 100 is used for electrical connection with an external power supply and control module, the external power supply can supply power to the heating unit 200 through the electrical output interface on the vacuum chamber 100. Simultaneously, the control module can establish a signal connection with the electrical input interface of the heating unit 200 through the electrical output interface on the vacuum chamber 100, thereby facilitating the adjustment of the heating energy of the heating unit 200.

[0114] Please combine Figure 1 and Figure 2 In one embodiment, the vacuum chamber 100 has two sidewalls opposite each other along the second direction XX', and one end of the heating unit 200 adjacent to the sidewall is mounted on the sidewall.

[0115] Specifically, the two opposite sidewalls of the vacuum chamber 100 along the second direction XX' are the first sidewall 111 and the second sidewall 112, respectively. For the case where the number of heating unit columns is one column, i.e. Figure 1 As shown, each heating unit 200 in this column of heating units is adjacent to a side wall. These heating units 200 are adjacent not only to the first side wall 111 but also to the second side wall 112. The end of the heating unit 200 adjacent to the first side wall 111 is mounted on the first side wall 111, and the end adjacent to the second side wall 112 is mounted on the second side wall 112.

[0116] In one embodiment, a mounting groove is provided on the side wall, and the mounting groove extends along the third direction YY'. One end of the heating unit 200 adjacent to the side wall is mounted in the mounting groove.

[0117] Specifically, the mounting groove extends along the third direction YY', so the heating unit 200 can slide into the mounting groove along the third direction YY', thereby achieving convenient assembly on the side wall. In the case where the number of heating units is one column, one end of the heating unit 200 engages with the mounting groove on the first side wall 111, and the other end engages with the mounting groove on the second side wall 112.

[0118] Specifically, please combine Figure 1 and Figure 2The mounting slots corresponding to a heating unit 200 include a first mounting slot 110a and a second mounting slot 110b, both extending in the third direction YY'. The first mounting slot 110a is used to cooperate with the contact heating part 210, and the second mounting slot 110b is used to cooperate with the radiant heating part 220 (specifically, the integrated plate 221).

[0119] For the case where the number of heating unit columns is one column, that is... Figure 1 and Figure 2 As shown, the first sidewall 111 and the second sidewall 112 are respectively provided with first mounting grooves 110a corresponding to the contact heating part 210. One end of the contact heating part 210 engages with the first mounting groove 110a on the first sidewall 111, and the other end of the contact heating part 210 engages with the first mounting groove 110a on the second sidewall 112. Similarly, the first sidewall 111 and the second sidewall 112 are respectively provided with second mounting grooves 110b corresponding to the radiant heating part 220. One end of the radiant heating part 220 engages with the second mounting groove 110b on the first sidewall 111, and the other end of the radiant heating part 220 engages with the second mounting groove 110b on the second sidewall 112.

[0120] In one embodiment, the battery drying equipment includes a row of heating units, which includes a plurality of heating units 200 arranged at intervals along a first direction ZZ'. The two ends of each heating unit 200 along a second direction XX' are respectively mounted on two side walls. The side walls have electrical output interfaces, and the end of each heating unit 200 connected to the side wall has an electrical input interface.

[0121] When the heating unit 200 is installed on the two side walls at both ends along the second direction XX', the electrical input interface at one end of the heating unit 200 is electrically connected to the electrical output interface on the side wall, so that it can be electrically connected to the external power supply and control module through the electrical output interface on the side wall to realize the power supply and control of the heating unit 200.

[0122] Figure 6 for Figure 4 A schematic diagram of the contact heating element on the side facing away from the battery cell. (Combined with...) Figure 3 and Figure 6 The electrical input interface on the contact heating unit 210 can be defined as the first electrical input interface 210a, and the electrical input interface on the radiant heating unit 220 (specifically on the integrated board 221) can be defined as the second electrical input interface 220a. Correspondingly, the side wall (which can be the first side wall or the second side wall) has a first electrical output interface corresponding to the first electrical input interface 210a and a second electrical output interface corresponding to the second electrical input interface 220a.

[0123] Specifically, the electrical output interface on the side wall can be located on the wall of the mounting slot. Thus, when one end of the heating unit 200 is installed in the mounting slot, the electrical input interface at one end of the heating unit 200 can be electrically connected to the electrical output interface on the wall of the mounting slot. For example, the first mounting slot has a first electrical output interface on its wall, and the second mounting slot has a second electrical output interface on its wall.

[0124] In other embodiments, when the battery drying equipment includes multiple rows (e.g., two rows, three rows, etc.) of heating unit rows (not shown), the vacuum chamber 100 includes not only the two opposing side walls (first side wall 111 and second side wall 112) mentioned above, but also a partition wall. A partition wall is provided between any two adjacent heating unit rows, and one end of the heating unit 200 adjacent to the partition wall is installed on the partition wall.

[0125] Understandably, in the case of multiple heating unit columns, the heating unit columns adjacent to the first sidewall 111 and the second sidewall 112 are not the same heating unit column. For example, when there are two heating unit columns, a partition wall is provided between the two columns. The ends of the two columns that are closer to each other are connected to the partition wall, and the ends that are farther apart are connected to the first sidewall 111 and the second sidewall 112, respectively. When there are three or four heating unit columns, the number of partition walls increases to two and three, respectively. One end of the heating unit column adjacent to the first sidewall 111 is connected to the first sidewall 111, and the other end is connected to an adjacent partition wall. One end of the heating unit column adjacent to the second sidewall 112 is connected to the second sidewall 112, and the other end is connected to an adjacent partition wall. The two ends of the other heating unit columns are connected to adjacent partition walls, respectively.

[0126] In the case of multiple rows of heating units, the connection method between the heating unit 200 in the row of heating units adjacent to the side wall of the vacuum chamber 100 and the side wall is the same as the connection method between the heating unit 200 in the single row of heating units and the side wall, and will not be described again. The connection method between one end of the heating unit 200 and the partition wall is the same as the connection method between the heating unit 200 and the side wall; that is, the partition wall can also be provided with the same mounting groove and electrical output interface as the side wall. For details, please refer to the description in the aforementioned embodiments, and will not be described in detail here.

[0127] 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 battery drying device, characterized in that, The battery drying equipment includes a vacuum chamber and at least one heating unit located inside the vacuum chamber; The heating unit includes a contact heating section and a radiant heating section arranged opposite to each other. The side of the contact heating section near the radiant heating section is used to support the battery cell and perform contact heating on the battery cell. The radiant heating section is used to perform radiant heating on the side of the battery cell facing away from the contact heating section.

2. The battery drying equipment according to claim 1, characterized in that, The radiant heating element includes an integrated plate and multiple infrared light-emitting elements, which are disposed on the integrated plate and located on the side of the integrated plate close to the battery cell.

3. The battery drying equipment according to claim 2, characterized in that, The infrared light-emitting element includes an infrared light source and a lens. The light-incident surface of the lens faces the infrared light source, and the light-exiting surface of the lens faces the battery cell. The light-exiting surface of the lens is constructed with multiple light-diffusing microstructures.

4. The battery drying equipment according to claim 3, characterized in that, The incident surface of the lens is provided with an anti-reflective coating.

5. The battery drying equipment according to claim 3, characterized in that, The incident surface of the lens is provided with an anti-reflective coating layer, the anti-reflective coating layer having a reflectivity of <3% for infrared light emitted by the infrared light source; and / or, The light transmittance of the lens is ≥92%.

6. The battery drying equipment according to claim 2, characterized in that, The wavelength λ of the infrared light emitted by the infrared light-emitting element satisfies the condition: 3μm≥λ≥2μm.

7. The battery drying equipment according to claim 1, characterized in that, It also includes a temperature sensing element, which is located inside the vacuum chamber and is used to detect the temperature of the cell surface.

8. The battery drying equipment according to claim 7, characterized in that, It also includes a control module, which is connected to the temperature sensor and the heating unit respectively, and is used to adjust the heating energy of the heating unit according to the detection result of the temperature sensor.

9. The battery drying equipment according to claim 1, characterized in that, The battery drying equipment includes a row of heating units, or the battery drying equipment includes multiple rows of heating units arranged along a second direction, the second direction intersecting with the first direction, the first direction being the relative direction between the contact heating part and the radiation heating part; The heating unit column includes a plurality of heating units arranged at intervals along a first direction.

10. The battery drying equipment according to claim 1, characterized in that, The heating unit is installed in the vacuum chamber; the heating unit has an electrical input interface, the vacuum chamber has an electrical output interface, the electrical input interface and the electrical output interface are electrically connected, and the electrical output interface is used to electrically connect to an external power supply and a control module.

11. The battery drying equipment according to claim 1, characterized in that, The vacuum chamber has two sidewalls opposite each other along a second direction. The sidewalls are provided with mounting grooves. The mounting grooves extend along a third direction. One end of the heating unit adjacent to the sidewall is installed in the mounting groove. The second direction intersects with the first direction. The first direction is the opposite direction of the contact heating part and the radiation heating part. The third direction intersects with the first direction and also with the second direction.

Images