Full-contact vacuum drying equipment

Abstract

The utility model discloses full-contact vacuum drying equipment, which belongs to the technical field of drying and comprises a drying box and a heating clamp, the heating clamp comprises an upper heating clamp and a lower heating clamp, the lower heating clamp is fixed in a vacuum chamber of the drying box, and the upper heating clamp is placed on the lower heating clamp and matched with the lower heating clamp. A wrapping type design is adopted, so that the heating plate is in direct contact with each surface of a material, all-directional heating is realized, heating is more uniform, under the control of special software, the temperature of the heating plate can be randomly adjusted in a vacuum state, accurate temperature control is realized, high-speed drying and moisture removal are realized, and the purpose of accurately controlling the temperature is achieved; and the rapid drying effect is achieved through the pressure difference generated by negative pressure, and the drying efficiency is higher than that of a traditional mode by 100% or above.

Description

Technical Field

[0001] The utility model relates to the technical field of drying, in particular to full-contact vacuum drying equipment capable of contact heating multiple surfaces of a material at the same time. Background Art

[0002] Vacuum ovens, also known as vacuum ovens, vacuum baking ovens, and vacuum furnaces, are widely used in the chemical, electronics, food, light industry, and pharmaceutical industries to dry materials under vacuum. They offer the advantages of fast drying speed, minimal pollution, and no damage to the inherent quality of the dried items. Battery-specific vacuum ovens are specifically designed for the baking process of lithium-ion batteries. Due to the special properties of the materials used in these ovens, they must be resistant to strong acid and alkali corrosion, possess precise temperature control, efficient programmable control, and be stable and safe.

[0003] Currently, vacuum baking of batteries in China mostly uses the following three methods. The first is hot air heating, which uses hot gas to heat the material. The disadvantage of this heating method is that, in a vacuum, the absence of a gas medium prevents continuous and uniform gas heating of the material. This results in significant temperature loss in the chamber, causing uneven heating of the material, which seriously affects yield and production efficiency. The second method uses thermal radiation heating, which uses radiation from a heating source to heat the material. This method also has the disadvantage of uneven heating, with materials closer to the heating source experiencing higher temperatures and those farther away experiencing lower temperatures. This results in large temperature differences, seriously impacting yield and production efficiency. The third method is single-sided heat conduction heating, where the material is placed on a heated surface and the heat is transferred from one surface to the entire material. This heating method is unsuitable for heating large materials, as the larger the material, the worse the temperature difference and heating time. This product is not suitable for heating small materials, such as Bluetooth and mobile phone batteries. However, laptop batteries, car batteries, power batteries, and energy storage batteries are not suitable. Utility Model Content

[0004] The main purpose of the utility model is to provide a full-contact vacuum drying equipment, which adopts a wrapping design so that the heating plate directly contacts every surface of the material, heating more evenly, and realizes precise temperature control under the control of special software, which can dry and remove moisture at high speed, solving the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A full-contact vacuum drying device includes a drying box and a heating clamp, wherein a vacuum chamber is provided inside the drying box, and the heating clamp includes an upper heating clamp and a lower heating clamp, wherein the lower heating clamp is fixed in the vacuum chamber of the drying box, and the upper heating clamp is placed on the lower heating clamp and cooperates with the lower heating clamp, wherein the bottom surface of the upper heating clamp is distributed with a plurality of conductive contact holes, and the surface of the lower heating clamp is distributed with conductive probes corresponding to the number and position of the conductive contact holes, and the upper heating clamp includes a frame, a synchronous tensioning device and a heating plate, wherein guide pillars are provided on both inner sides of the frame, and a card slot is provided on the inner side of the guide pillar, and the two ends of the heating plate are inserted into the card slot to form a battery slot for placing batteries.

[0007] Preferably, the synchronous tensioning device includes an adjusting rod, a thrust plate and two trapezoidal screw rods arranged on the front side of the frame. The two trapezoidal screw rods are respectively arranged on the left and right sides of the frame. The thrust plate is arranged horizontally on the frame. The two ends of the thrust plate are transmission connected to the trapezoidal screw rod. The front end of the trapezoidal screw rod is provided with a synchronous wheel, and the synchronous wheel is transmission connected to the adjusting rod through a synchronous belt.

[0008] Preferably, the frame includes a bottom plate, a front side plate and a rear side plate, wherein a side frame is provided between the front side plate and the rear side plate, the side frame is composed of a plurality of vertical columns and a cross bar, the top surface of the cross bar is concave to form a guide groove, a guide wheel is provided in the guide groove, and the guide wheel and the guide column are movably connected.

[0009] Preferably, there are several heating plates, which are distributed on the bottom surface of the frame and in the slots of the guide pillars.

[0010] Preferably, the frame is further provided with a plurality of positioners and insulating sheets, the positioners are provided at the four corners of the bottom surface of the base plate, and the insulating sheets are attached to the conductive contact holes of the base plate.

[0011] Preferably, the heating lower clamp includes a base and two groups of insulating plate bridge frames, the two groups of insulating plate bridge frames are arranged on the base, the sides of the two groups of insulating plate bridge frames are provided with terminal blocks, the surfaces of the insulating plate bridge frames are provided with insulating plates, the conductive probes are evenly distributed on the insulating plate bridge frames and pass through the insulating plates, and the conductive probes are electrically connected to the terminal blocks.

[0012] Preferably, the base is further provided with a plurality of groups of insulating blocks, and the insulating blocks are arranged at the four corners and the left and right edges of the base.

[0013] Preferably, the base is further provided with a limit sensor, and there are two limit sensors in total, which are respectively arranged at the diagonal positions of the base.

[0014] Preferably, the base is further provided with positioning pins, and there are four positioning pins in total, all close to the four corners of the base.

[0015] Preferably, the base comprises a fixing plate and four frame bars, and the frame bars are fixed to the fixing plate by welding or fixing members, thereby being assembled into one body.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The utility model designs a brand-new heating device with a wrapping design, so that the heating plate is in direct contact with every surface of the material, achieving all-round heating and more uniform heating. Under the control of special software, the temperature of the heating plate can be adjusted at will under vacuum state, achieving precise temperature control, high-speed drying and removing moisture, achieving the purpose of precise temperature control, and taking advantage of the pressure difference generated by negative pressure to achieve the effect of rapid drying. The drying efficiency is more than 100% faster than the traditional method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is a schematic diagram from another angle of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the heating upper clamp of the utility model;

[0021] Figure 4 This is a schematic diagram of the bottom structure of the upper heating fixture of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the heating lower clamp of the utility model;

[0023] Figure 6 This is a schematic structural diagram of the heating fixture of the present invention.

[0024] In the figure: 1. Drying oven; 11. Vacuum chamber; 12. Control system; 2. Heating upper fixture; 201. Conductive contact hole; 202. Frame; 203. Synchronous tensioning device; 2031. Adjusting rod; 2032. Thrust plate; 2033. Trapezoidal screw; 2034. Synchronous wheel; 2035. Synchronous belt; 204. Heating plate; 205. Guide column; 206. Slot; 207. Guide groove; 208. Guide wheel; 209. Positioner; 210. Insulating sheet; 3. Heating lower fixture; 301. Conductive probe; 302. Insulating plate bridge; 303. Terminal block; 304. Insulating block; 305. Limit sensor; 306. Positioning pin; 307. Insulating plate; 4. Battery. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] like Figure 1-6 As shown, a full-contact vacuum drying equipment in this scheme includes a drying oven 1 and a heating fixture. The interior of the drying oven 1 is provided with a vacuum chamber 11. The heating fixture includes a heating upper fixture 2 and a heating lower fixture 3. The heating lower fixture 3 is fixed in the vacuum chamber 11 of the drying oven 1. The heating upper fixture 2 is placed on the heating lower fixture 3 and cooperates with the heating lower fixture 3. The bottom surface of the heating upper fixture 2 is distributed with a plurality of conductive contact holes 201, and the surface of the heating lower fixture 3 is distributed with conductive probes 301 corresponding to the number and position of the conductive contact holes 201. The heating upper fixture 2 includes a frame 202, a synchronous tensioning device 203 and a heating plate 204, wherein guide pillars 205 are provided on both inner sides of the frame 202, and a card slot 206 is provided on the inner side of the guide pillar 205. The two ends of the heating plate 204 are inserted into the card slot 206 to form a battery slot for placing the battery 4. The battery 4 is placed in the battery slot, and the battery 4 in the battery slot is tightened by adjusting the synchronous tensioning device 203.

[0027] Specifically, the synchronous tensioning device 203 includes an adjusting rod 2031, a thrust plate 2032 and two trapezoidal screw rods 2033 arranged on the front side of the frame 202. The two trapezoidal screw rods 2033 are respectively arranged on the left and right sides of the frame 202. The thrust plate 2032 is horizontally arranged on the frame 202. The two ends of the thrust plate 2032 are transmission connected to the trapezoidal screw rod 2033. The front end of the trapezoidal screw rod 2033 is provided with a synchronous wheel 2034, and the synchronous wheel 2034 is transmission connected to the adjusting rod 2031 through a synchronous belt 2035. During operation, the adjusting rod 2031 is screwed with a wrench, and the adjusting rod 2031 rotates to drive the synchronous belt 2035, and the synchronous belt 2035 drives the two synchronous wheels 2034 to rotate synchronously. The rotation of the synchronous wheel 2034 also drives the trapezoidal screw rod 2033. As the trapezoidal screw rod 2033 rotates, the thrust plate 2032 moves forward along the trapezoidal screw rod 2033 to tighten the battery 4. The heating plate 204 is pushed together with the thrust plate 2032 to fit tightly against the contact surface of the battery 4, realizing full-contact wrapping heating.

[0028] Specifically, the frame 202 includes a bottom plate, front side plates, and rear side plates. A side frame is disposed between the front and rear side plates. The side frame is composed of several uprights and crossbars. The top surfaces of the crossbars are concave to form guide grooves 207. Guide wheels 208 are disposed within guide grooves 207 and are movably connected to guide posts 205. During operation, guide wheels 208 are embedded in the guide rails. When pushed by thrust plate 2032, guide wheels 208 move along the guide rails to clamp battery 4, assisting guide posts 205 in moving forward and backward, making the movement smoother.

[0029] Specifically, the heating plates 204 are provided in a plurality of pieces and are distributed on the bottom surface of the frame 202 and in the slots 206 of the guide pillars 205. The heating plates 204 correspond to the slots 206, and the two sides of the heating plates 204 match the slots 206 of the guide pillars 205, which is easy to operate and can easily replace heating plates 204 of various shapes and specifications, and has a wider range of applications.

[0030] Specifically, the frame 202 is also equipped with several positioners 209 and insulating sheets 210. The positioners 209 are located at the four corners of the bottom surface of the base plate, and the insulating sheets 210 are attached to the conductive contact holes 201 of the base plate. The positioners 209 allow the upper heating fixture 2 to be aligned with the lower heating fixture 3, ensuring more precise alignment. At the same time, the insulating sheets 210 ensure the insulation of each conductive contact hole 201.

[0031] Specifically, the heating lower clamp 3 includes a base and two groups of insulating plate bridge frames 302, the two groups of insulating plate bridge frames 302 are arranged on the base, the sides of the two groups of insulating plate bridge frames 302 are provided with terminal blocks 303, the surface of the insulating plate bridge frames 302 is provided with insulating plates 307, the conductive probes 301 are evenly distributed on the insulating plate bridge frames 302 and pass through the insulating plates 307, and the conductive probes 301 are electrically connected to the terminal blocks 303.

[0032] Specifically, the base is also equipped with several sets of insulating blocks 304, located at the four corners and left and right edges of the base. When the upper heating fixture 2 and the lower heating fixture 3 are combined, an insulating block 304 is added between them to prevent short circuits caused by direct contact, further improving safety.

[0033] Specifically, the base is further provided with two limit sensors 305, which are respectively located at opposite corners of the base. When in use, after the upper heating clamp 2 and the lower heating clamp 3 are closed, if the two are in poor contact, the system will sound a warning alarm.

[0034] Specifically, the base is further provided with four positioning pins 306, all located near the four corners of the base. When the upper heated clamp 2 and the lower heated clamp 3 are closed, the positioning pins 306 correspond to the positioners 209 to ensure accurate closing and avoid deviation.

[0035] Specifically, the base comprises a fixed plate and four frame bars, which are fixed to the fixed plate by welding or fixing members, thereby forming a whole. By adopting the above technical solution, the structure is simple, the design is reasonable, the assembly and disassembly are convenient, and the production cost is low.

[0036] It is worth mentioning that the heating fixture can be adapted to heat materials of various shapes and specifications, such as Figure 6 As shown, such as: power soft pack battery 4, power blade battery 4, power cylindrical battery 4, power hard shell (square shell) battery 4, etc., the device achieves the purpose of flexibility, versatility and cost saving. When replacing the finished product, it is only necessary to unlock the heating plate slot 206, remove the original heating plate, and then install several heating plates corresponding to the specifications of the battery 4 into the slot 206 and lock the slot 206. The time for replacing the battery 4 model is ≤ 10 minutes, and it is widely used.

[0037] It should be noted that when the present invention is working, the material is filled into the wrapped heating upper clamp 2, and then the wrapped heating upper clamp 2 is transported to the vacuum chamber 11 and combined with the heating lower clamp 3. The electric probe 301 of the heating lower clamp 3 is in contact with the conductive contact hole 201 of the heating upper clamp 2. The process parameters such as temperature and time are set by the control system 12. The equipment automatically starts vacuum and heating to heat the material and remove excess moisture. During heating, the wrapped heating upper clamp 2 heats the bottom surface of the material with a heating plate 204, and the heating plates 204 on both sides will continuously heat the three sides of the material according to the set parameters. The temperatures of these three heating surfaces are independently controlled, and the PID is automatically adjusted. The negative pressure generated by the vacuum chamber 11 accelerates the vaporization and volatilization of moisture to achieve the purpose of quickly removing moisture. The control parameters of the equipment system can be freely set to match more different products and characteristics.

[0038] When the finished product model needs to be changed, the upper heating fixture 2 can be replaced. Just unlock the fixing screws of the heating plate 204 and replace the heating plate 204 customized for the corresponding product. The lower heating fixture 3 does not need to be replaced. You only need to perform program operations in the control system 12.

[0039] Anything not described in detail in the present invention is well known to those skilled in the art.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A full-contact vacuum drying device, comprising a drying box (1) and a heating fixture, wherein a vacuum chamber (11) is provided inside the drying box (1), and characterized in that: The heating fixture comprises an upper heating fixture (2) and a lower heating fixture (3), wherein the lower heating fixture (3) is fixed in a vacuum chamber (11) of a drying box (1), and the upper heating fixture (2) is placed on the lower heating fixture (3) and cooperates with the lower heating fixture (3). The bottom surface of the upper heating fixture (2) is distributed with a plurality of conductive contact holes (201), and the surface of the lower heating fixture (3) is distributed with conductive probes (301) corresponding in number and position to the conductive contact holes (201). The upper heating fixture (2) comprises a frame (202), a synchronous tensioning device (203) and a heating plate (204), wherein both inner sides of the frame (202) are provided with guide pillars (205), and the inner side of the guide pillars (205) is provided with a card slot (206), and the two ends of the heating plate (204) are inserted into the card slot (206) to form a battery (4) slot for placing the battery (4).

2. A full-contact vacuum drying equipment according to claim 1, characterized in that: The synchronous tensioning device (203) comprises an adjusting rod (2031) arranged on the front side of the frame (202), a thrust plate (2032) and two trapezoidal screw rods (2033), the two trapezoidal screw rods (2033) being arranged on the left and right sides of the frame (202) respectively, the thrust plate (2032) being arranged transversely on the frame (202), the two ends of the thrust plate (2032) being transmission-connected to the trapezoidal screw rods (2033), the front end of the trapezoidal screw rods (2033) being provided with a synchronous wheel (2034), and the synchronous wheel (2034) being transmission-connected to the adjusting rod (2031) via a synchronous belt (2035).

3. The full-contact vacuum drying equipment according to claim 1, characterized in that: The frame (202) includes a bottom plate, a front side plate and a rear side plate, wherein a side frame is provided between the front side plate and the rear side plate, the side frame is composed of a plurality of upright posts and a cross bar, the top surface of the cross bar is concave to form a guide groove (207), a guide wheel (208) is provided in the guide groove (207), and the guide wheel (208) and the guide post (205) are movably connected.

4. The full-contact vacuum drying equipment according to claim 1, characterized in that: The heating plates (204) are provided in a number and are distributed on the bottom surface of the frame (202) and in the slots (206) of the guide pillars (205).

5. The full-contact vacuum drying equipment according to claim 3, characterized in that: The frame (202) is also provided with a plurality of positioners (209) and insulating sheets (210). The positioners (209) are provided at the four corners of the bottom surface of the base plate, and the insulating sheets (210) are attached to the conductive contact holes (201) of the base plate.

6. The full-contact vacuum drying equipment according to claim 1, characterized in that: The heating lower clamp (3) includes a base and two groups of insulating plate bridge frames (302), wherein the two groups of insulating plate bridge frames (302) are arranged on the base, and the sides of the two groups of insulating plate bridge frames (302) are provided with terminal blocks (303), and the surfaces of the insulating plate bridge frames (302) are provided with insulating plates (307), and the conductive probes (301) are evenly distributed on the insulating plate bridge frames (302) and pass through the insulating plates (307), and the conductive probes (301) are electrically connected to the terminal blocks (303).

7. The full-contact vacuum drying equipment according to claim 6, characterized in that: The base is also provided with a plurality of groups of insulating blocks (304), and the insulating blocks (304) are arranged at the four corners and the left and right edges of the base.

8. The full-contact vacuum drying equipment according to claim 7, characterized in that: The base is also provided with a limit sensor (305), and there are two limit sensors (305) in total, and the two limit sensors (305) are respectively provided at the diagonal positions of the base.

9. The full-contact vacuum drying equipment according to claim 8, characterized in that: The base is also provided with positioning pins (306), and there are four positioning pins (306) in total, all of which are close to the four corners of the base.

10. The full-contact vacuum drying equipment according to any one of claims 6 to 9, characterized in that: The base comprises a fixing plate and four frame bars, and the frame bars are fixed to the fixing plate by welding or fixing pieces, so as to be assembled into one body.

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