Variable-frequency microwave heating device and vacuum heating furnace

Abstract

The invention relates to the technical field of battery cell drying, and discloses a variable-frequency microwave heating device and a vacuum heating furnace. The variable-frequency microwave heating device comprises an outer frame body, a first heating assembly and a plurality of second heating assemblies; wherein the first heating assembly comprises two mounting plates and a plurality of first heating plates, the two mounting plates are fixed to the two ends of the interior of the outer frame body respectively, and the first heating plates are mounted on the two mounting plates respectively. The frequency conversion microwave heating device replaces a traditional fixed heating device structure, the universality of the device is greatly improved, heating devices of different specifications do not need to be prepared to be matched with batteries of different shapes, the equipment cost and space occupation are reduced, the production efficiency and the equipment utilization rate are improved, and the production cost is reduced. And remarkable convenience and economic benefits are brought to the lithium battery production industry.

Description

Technical Field

[0001] The invention relates to the technical field of battery core drying, and in particular to a variable frequency microwave heating device and a vacuum heating furnace. Background Art

[0002] Heating and drying is a crucial step in the production of lithium batteries. The main purpose of this step is to remove moisture or other solvents from lithium battery materials to ensure the stability and performance of battery materials. The heating and drying process involves multiple key links, such as drying of electrodes after coating and baking of battery cells.

[0003] Common lithium batteries on the market can be basically divided into square batteries, soft-pack batteries, cylindrical batteries and blade batteries. Among them, square batteries, soft-pack batteries and blade batteries are sheet-shaped or plate-shaped in appearance, and cylindrical batteries are columnar structures. However, battery drying equipment in the prior art is usually only able to dry batteries of a certain shape, and its versatility is poor and cannot be applied to batteries of different shapes. For example, a Chinese patent with announcement number CN105180643A discloses a lithium battery drying rack, a lithium battery drying device and a method for drying lithium batteries, which belong to the field of lithium-ion battery technology, including a drying rack body, the drying rack body including a drying rack crossbeam extending in the front-to-back direction and a drying rack crossbeam fixedly arranged on the drying rack crossbeam. A battery tray is provided on one side or both sides and extends in the left-right direction. A vacuum pipeline for sealingly connecting to the vacuum port of the battery is fixedly provided on the cross beam of the drying rack. A limiting mechanism for keeping the battery in a sealed connection state with the vacuum pipeline is fixedly provided on the battery tray. The lithium battery drying rack proposed in the above scheme improves the drying efficiency of lithium batteries and reduces production costs. However, this scheme has this deficiency. This limitation leads to the need to replace or adjust the equipment for different battery shapes when in use, which increases the complexity and cost of production operations, and also reduces production efficiency and equipment utilization. Therefore, the battery drying equipment in the prior art has obvious deficiencies in meeting the drying needs of diversified battery shapes.

[0004] Therefore, it is necessary to design a variable frequency microwave heating device and a vacuum heating furnace to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a variable frequency microwave heating device and a vacuum heating furnace.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A variable frequency microwave heating device comprises an outer frame, a first heating component and a plurality of second heating components; Wherein, the first heating assembly comprises two mounting plates and a plurality of first heating plates, the two mounting plates are respectively fixed at two ends of the inner part of the outer frame, and the plurality of first heating plates are respectively mounted on the two mounting plates; Among them, several second heating components are arranged between two mounting plates, and several second heating components are distributed in a linear array, each of the second heating components is composed of a first heating element and an adjusting element, the first heating element includes an assembly plate and two movable plates, the two movable plates are respectively arranged on both sides of the assembly plate, and several second heating plates are installed on each movable plate. The adjusting element is arranged on the top of the assembly plate for adjusting the distance between the two movable plates, and several positioning frames are fixed on the assembly plate, and each of the positioning frames is a U-shaped structure.

[0007] As a preferred technical solution of the present invention, the first heating element also includes two installation openings and two elastic connecting members, the two installation openings are respectively opened at both ends of the assembly plate, the two elastic connecting members are respectively arranged in the two installation openings, and the two movable plates are connected by two elastic connecting members.

[0008] As a preferred technical solution of the present invention, the elastic connecting member includes a cylinder and two connecting rods. The cylinder is fixed in the installation port, and both ends of the cylinder are open. The two connecting rods are slidably arranged in the cylinder. The ends of the two connecting rods that are away from each other extend to the outside of the cylinder. The ends of the two connecting rods that are away from each other are fixedly connected to two movable plates respectively, and the ends of the two connecting rods that are close to each other are connected by a connecting spring.

[0009] As a preferred technical solution of the present invention, the adjusting member includes a fixed frame, an adjusting screw, a movable plate, two extrusion plates and two push rods. The fixed frame is in a U-shaped structure and is fixed to the top surface of the assembly plate. The adjusting screw passes through the fixed frame and is threadedly connected to the fixed frame. The movable plate is rotatably mounted on the bottom end of the adjusting screw. The two extrusion plates are fixed to the bottom surface of the movable plate, and the two extrusion plates are respectively arranged on both sides of the assembly plate. Each of the extrusion plates is provided with an inclined surface, and the inclined surfaces of the two extrusion plates are respectively arranged opposite to the two movable plates. The two push rods are respectively fixed on the opposite sides of the two movable plates, and the two push rods are respectively arranged opposite to the two extrusion plates. The fixed frame is provided with two guide openings, and guide strips are fixed on both sides of the movable plate. The ends of the two guide strips away from the movable plate extend into the two guide openings respectively, and the two guide strips slide in the two guide openings respectively.

[0010] As a preferred technical solution of the present invention, a plurality of third heating components are arranged on each of the assembly plates, and the plurality of third heating components are distributed on both sides of the assembly plate, and each of the third heating components includes a second heating element, a fixing element, a pressing element and a limiting element; Wherein, the fixing member comprises a side plate and two movable clamping plates, and the two clamping plates are slidably assembled on the side plate; Wherein, the pressing member and the limiting member are both arranged on the side plate, the pressing member is used to drive the two pressing plates to move, and the limiting member is used to provide limiting for the two pressing plates.

[0011] As a preferred technical solution of the present invention, the second heating element includes a heating seat, a heating port and an annular heating diaphragm, the heating seat is installed on the side of the assembly plate, the heating port is opened on the heating seat, and the annular heating diaphragm is installed inside the heating port.

[0012] As a preferred technical solution of the present invention, the fixing member also includes a through slot, which is opened on the side of the side plate, and the two clamping plates are slidably arranged in the through slot, and the ends of the two clamping plates away from each other extend to the outside of the through slot.

[0013] As a preferred technical solution of the present invention, the lower pressing member includes a slot, two inclined plates and a pressing block. The slot is opened on the slot wall of the through slot. The two inclined plates are respectively fixed on the sides of the two clamping plates. The two inclined plates are both inclined, and the inclination directions of the two inclined plates are opposite. The pressing block is slidably set in the slot. The pressing block is arranged above the two inclined plates, and the pressing block is set opposite to the two inclined plates.

[0014] As a preferred technical solution of the present invention, the limit member includes a vertical rod, two connecting rods, a limit ring, a limit block and a movable ring. The top surface of the side plate is provided with a through hole connected to the groove, the vertical rod slides in the through hole, the bottom end of the vertical rod is rotatably connected with the pressure block, a knob is fixed on the top of the vertical rod, the two connecting rods are fixed on the top surface of the side plate, the limit ring is fixed between the two connecting rods, and the limit ring is sleeved on the vertical rod, the limit block is fixed on the outer circumferential surface of the vertical rod, the limit block is placed above the limit ring, the limit ring is provided with a limit opening matched with the limit block, the movable ring is slidably sleeved on the vertical rod, the movable ring is connected to the top surface of the side plate by a booster spring, and the movable ring is located below the limit ring.

[0015] A vacuum heating furnace comprises vacuum heating equipment, wherein the vacuum heating equipment adopts the variable frequency microwave heating device.

[0016] The present invention has the following beneficial effects: 1. The variable frequency microwave heating device proposed in the present invention has two use states, which can flexibly adapt to the drying of batteries of different shapes. In the first use state, the movable plates in the two adjacent second heating components and the second heating plates thereon can effectively heat and dry square batteries, soft-pack batteries and blade batteries, while in the second use state, the annular heating diaphragm in the heating port can be used to heat and dry cylindrical batteries. This design replaces the traditional fixed heating device structure, greatly expanding the versatility of the device. There is no need to prepare heating devices of different specifications to adapt to batteries of different shapes, reducing equipment cost and space occupancy, improving production efficiency and equipment utilization, and bringing significant convenience and economic benefits to the lithium battery production industry; 2. In the design of the second heating component, by adjusting the distance between the two movable plates in the first heating element, the device can flexibly adapt to the heating treatment of plate-shaped batteries of different sizes. The staff only needs to turn the hand wheel on the adjusting screw to drive the adjusting screw to move, and drive the movable plate to move stably along the guide port and the guide bar. The movement of the movable plate further drives the two extrusion plates to move synchronously, and the inclined surface on the extrusion plate squeezes or releases the top rod on the movable plate, so that the two movable plates can move away from or close to each other. This adjustment mechanism is not only easy to operate, but also greatly improves the scope of application and flexibility of the device, so that the same device can effectively heat and dry square batteries, soft-pack batteries or blade batteries of different sizes without replacing or adjusting the equipment, reducing production costs and operating complexity, and improving production efficiency and equipment utilization. 3. The first heating assembly arranged inside the outer frame is fixed and installed with a plurality of first heating plates through two mounting plates, and cooperates with the second heating plate to realize comprehensive heating and drying of the battery. This design enables the movable plates at both ends of the outer frame to fully exert the heating effect, thereby improving the heating efficiency. At the same time, due to the addition of the first heating assembly, more batteries can be placed inside the outer frame, thereby processing more batteries in a limited space, significantly improving the battery processing efficiency. This design not only optimizes the equipment space utilization, but also improves the production efficiency and equipment capacity, bringing substantial improvement to the lithium battery production industry; 4. When heating cylindrical batteries, this design realizes effective heating treatment of cylindrical batteries by flexibly adjusting the position of the movable plate and inserting the heating seat. The heating seat can be conveniently and stably fixed between the movable plate and the assembly plate through the ingenious design of the fixing parts, the lower pressing parts and the limiting parts. In specific operations, the cooperation of the limiting block and the limiting ring, as well as the linkage mechanism of the vertical rod, the pressing block and the clamping plate, not only makes the installation process of the heating seat simple and quick, but also ensures the stability of the heating seat during operation. At the same time, the design of the booster spring and the movable ring provides a reliable fixing effect for the limiting block, and further ensures that the two clamping plates firmly fix the heating seat. This design not only improves the applicability and flexibility of the equipment, so that the same device can process batteries of different shapes, but also optimizes the operation process, improves work efficiency and equipment reliability, and brings significant convenience and benefits to lithium battery production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a variable frequency microwave heating device proposed by the present invention; Figure 2 It is a structural schematic diagram of another state of a variable frequency microwave heating device proposed by the present invention; Figure 3 is a schematic structural diagram of a second heating component; Figure 4 It is a schematic diagram of the structure of the assembly plate and a plurality of third heating components; Figure 5 It is a structural schematic diagram of the assembly plate, two movable plates and connecting parts; Figure 6 is a schematic structural diagram of a second heating element; Figure 7 is a schematic cross-sectional structural diagram of a second heating element; Figure 8 for Figure 4 A magnified view of the structure at A; Fig. 9 for Figure 6 A magnified view of the structure at B; Fig.10 for Figure 5 A magnified view of the structure at C; Fig.11 This is a schematic structural diagram of a vacuum heating furnace proposed by the present invention.

[0018] In the figure: 1. outer frame; 2. mounting plate; 3. first heating plate; 41. assembly plate; 42. mounting port; 43. elastic connector; 44. movable plate; 45. second heating plate; 51. fixing frame; 52. adjusting screw; 53. movable plate; 54. extrusion plate; 55. ejector rod; 61. heating seat; 62. heating port; 63. annular heating diaphragm; 71. side plate; 72. through groove; 73. clamping plate; 81. slot; 82. inclined plate; 83. pressing block; 91. vertical rod; 92. connecting rod; 93. limiting ring; 94. limiting block; 95. limiting port; 96. movable ring; 97. booster spring; 10. positioning frame; 11. vacuum heating equipment. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figure 1-Figure 10 A variable frequency microwave heating device comprises an outer frame 1, a first heating component and a plurality of second heating components, the first heating component comprises two mounting plates 2 and a plurality of first heating plates 3, the two mounting plates 2 are respectively fixed at the two ends inside the outer frame 1, and the plurality of first heating plates 3 are respectively mounted on the two mounting plates 2.

[0021] A plurality of second heating assemblies are arranged between the two mounting plates 2, and the plurality of second heating assemblies are distributed in a linear array, each of the second heating assemblies is composed of a first heating element and an adjusting element, the first heating element comprises an assembly plate 41 and two movable plates 44, the two movable plates 44 are respectively arranged on both sides of the assembly plate 41, and a plurality of second heating plates 45 are installed on each movable plate 44, the first heating element also comprises two mounting ports 42 and two elastic connecting members 43, the two mounting ports 42 are respectively opened at both ends of the assembly plate 41, the two elastic connecting members 43 are respectively arranged in the two mounting ports 42, the two movable plates 44 are connected by two elastic connecting members 43, the elastic connecting member 43 comprises a cylinder and two connecting rods, the cylinder is fixed in the mounting port 42, both ends of the cylinder are open, the two connecting rods are slidably arranged in the cylinder, the ends of the two connecting rods away from each other extend to the outside of the cylinder, the ends of the two connecting rods away from each other are respectively fixedly connected to the two movable plates 44, and the ends of the two connecting rods close to each other are connected by a connecting spring.

[0022] The adjusting member is arranged on the top of the assembly plate 41, and is used to adjust the distance between the two movable plates 44. A plurality of positioning frames 10 are fixed on the assembly plate 41, and each positioning frame 10 is in a U-shaped structure. The adjusting member includes a fixing frame 51, an adjusting screw 52, ​​a movable plate 53, two extrusion plates 54 and two push rods 55. The fixing frame 51 is in a U-shaped structure, and the fixing frame 51 is fixed to the top surface of the assembly plate 41. The adjusting screw 52 passes through the fixing frame 51 and is threadedly connected to the fixing frame 51. The movable plate 53 is rotatably mounted on the bottom end of the adjusting screw 52. The two The two extrusion plates 54 are fixed to the bottom surface of the movable plate 53, and the two extrusion plates 54 are respectively arranged on both sides of the assembly plate 41, each extrusion plate 54 is provided with an inclined surface, and the inclined surfaces of the two extrusion plates 54 are respectively arranged opposite to the two movable plates 44, and the two push rods 55 are respectively fixed on the opposite sides of the two movable plates 44, and the two push rods 55 are respectively arranged opposite to the two extrusion plates 54, and the fixed frame 51 is provided with two guide openings, and guide strips are fixed on both sides of the movable plate 53, and the ends of the two guide strips away from the movable plate 53 extend to the two guide strips respectively. When the two extrusion plates 54 move downward, the inclined surfaces on the two extrusion plates 54 respectively squeeze the ejector rods 55 on the two movable plates 44. At this time, the two ejector rods 55 drive the two movable plates 44 to move away from each other. When the two extrusion plates 54 move upward, the two extrusion plates 54 no longer squeeze the two ejector rods 55. At this time, the two movable plates 44 will approach each other under the action of the two elastic connectors 43. Therefore, the staff can adjust the positions of the two movable plates 44 by rotating the adjusting screw 52.

[0023] A plurality of third heating components are provided on each assembly plate 41, and the plurality of third heating components are distributed on both sides of the assembly plate 41. Each third heating component includes a second heating member, a fixing member, a pressing member and a limiting member. The second heating member includes a heating seat 61, a heating port 62 and an annular heating diaphragm 63. The heating seat 61 is installed on the side of the assembly plate 41, the heating port 62 is opened on the heating seat 61, and the annular heating diaphragm 63 is installed inside the heating port 62.

[0024] The fixing member includes a side plate 71 and two movable clamping plates 73. The two clamping plates 73 are slidably assembled on the side plate 71. The fixing member also includes a through groove 72. The through groove 72 is opened on the side of the side plate 71. The two clamping plates 73 are slidably set in the through groove 72. The ends of the two clamping plates 73 that are away from each other extend to the outside of the through groove 72.

[0025] The pressing member and the limiting member are both arranged on the side plate 71. The pressing member is used to drive the two clamping plates 73 to move. The limiting member is used to provide a limit for the two clamping plates 73. The pressing member includes a slot 81, two inclined plates 82 and a pressing block 83. The slot 81 is arranged on the slot wall of the through slot 72. The two inclined plates 82 are respectively fixed to the sides of the two clamping plates 73. The two inclined plates 82 are inclined, and the inclination directions of the two inclined plates 82 are opposite. The pressing block 83 is slidably arranged in the slot 81. The pressing block 83 is arranged between the two inclined plates 82. The top of the plate 82 is provided with a pressure block 83 facing the two inclined plates 82, and the limiting member includes a vertical rod 91, two connecting rods 92, a limiting ring 93, a limiting block 94 and a movable ring 96. The top surface of the side plate 71 is provided with a through hole connected to the slot 81, the vertical rod 91 slides in the through hole, the bottom end of the vertical rod 91 is rotatably connected to the pressure block 83, the top of the vertical rod 91 is fixed with a knob, the two connecting rods 92 are fixed on the top surface of the side plate 71, the limiting ring 93 is fixed between the two connecting rods 92, and the limiting ring 93 is sleeved. The vertical rod 91 is provided with a limit block 94 fixed on the outer peripheral surface of the vertical rod 91, and the limit block 94 is placed above the limit ring 93. The limit ring 93 is provided with a limit opening 95 adapted to the limit block 94. The movable ring 96 is slidably sleeved on the vertical rod 91. The movable ring 96 is connected to the top surface of the side plate 71 through a booster spring 97, and the movable ring 96 is located below the limit ring 93. When the heating seat 61 is assembled in place, the staff aligns the limit block 94 with the limit opening 95 on the limit ring 93 and presses down the vertical rod. When the vertical rod 91 moves downward, it can drive the pressing block 83 to move downward. When the pressing block 83 moves downward, it can squeeze the two inclined inclined plates 82, so that the two clamping plates 73 move away from each other until the two clamping plates 73 press the assembly plate 41 and the movable plate 44 respectively. At this time, the two clamping plates 73 jointly fix the heating seat 61, thereby fixing the heating seat 61 between the assembly plate 41 and the movable plate 44. This fixing method is easy to operate and can ensure the stability of the heating seat 61 during operation.

[0026] The specific working principle of the present invention is as follows: The variable frequency microwave heating device proposed in the present invention has two usage states. In the first usage state, the staff can place the battery between two movable plates 44 close to each other in two adjacent second heating components, and use the several second heating plates 45 on the above two movable plates 44 to heat and dry the battery. In this state, the variable frequency microwave heating device can dry square batteries, soft-pack batteries and blade batteries. In the second usage state, the staff inserts the battery into the heating port 62, and uses the annular heating membrane 63 to heat and dry the battery. In this state, the variable frequency microwave heating device can dry cylindrical batteries. Therefore, the variable frequency microwave heating device proposed in the present invention can dry various common batteries on the market, replaces the structure of the traditional fixed heating device, expands the versatility of the device, and does not need to prepare heating devices of different specifications to adapt to batteries of different shapes.

[0027] For the second heating component, the distance between the two movable plates 44 in the first heating element can be adjusted. The staff can adjust the distance between the two movable plates 44 close to each other in the two adjacent second heating components according to the size of the battery. Specifically, when adjusting the distance between the two movable plates 44 in the first heating element, the staff can turn the hand wheel on the adjusting screw 52 to rotate the adjusting screw 52. When the adjusting screw 52 rotates, it can move and drive the movable plate 53 to move. During the movement of the movable plate 53, the two guide openings and the two guide strips limit the movement of the movable plate 53, thereby ensuring the stability of the movable plate 53 during the movement. When the movable plate 53 moves, the two extrusion plates 54 thereon will move synchronously. When the two extrusion plates 54 move downward, the inclined surfaces on the two extrusion plates 54 will respectively squeeze the top rods 55 on the two movable plates 44. At this time, the two top rods 55 will drive the two movable plates 44 to move away from each other. When the two extrusion plates 54 move upward, the two extrusion plates 54 will no longer squeeze the two top rods 55. At this time, the two movable plates 44 will approach each other under the action of the two elastic connectors 43. Therefore, the staff can adjust the position of the two movable plates 44 by rotating the adjusting screw 52, ​​so that the device can heat plate-shaped batteries of different sizes, thereby expanding the scope of application of the device.

[0028] For the elastic connecting member 43, when the two movable plates 44 move, they respectively drive the two connecting rods to move, so that the two connecting rods move inside the cylinder. When the two movable plates 44 move away from each other, the two connecting rods will also move away from each other. At this time, the two connecting rods will jointly stretch the connecting spring. When the two extrusion plates 54 no longer squeeze the two push rods 55, the two movable plates 44 will be reset under the action of the connecting spring. In summary, the setting of the elastic connecting member 43 is used to ensure the stability of the two movable plates 44 during the movement, and at the same time is used for the automatic reset of the two movable plates 44.

[0029] In the present invention, in order to enable the movable plates 44 located at both ends of the outer frame 1 to also play a heating role, a first heating component is also provided inside the outer frame 1, and the first heating component includes two mounting plates 2 and a plurality of first heating plates 3. The two mounting plates 2 are respectively fixed at the two ends inside the outer frame 1, and the plurality of first heating plates 3 are respectively installed on the two mounting plates 2. The first heating plate 3 and the second heating plate 45 can jointly heat and dry the battery, so that more batteries can be placed inside the outer frame 1, thereby improving the processing efficiency of the battery.

[0030] When it is necessary to heat a cylindrical battery, the staff first adjusts the movable plates 44 in the first heating components until the two movable plates 44 close to each other in the two adjacent second heating components fit together. In this case, the distance between the movable plate 44 and the corresponding assembly plate 41 is the largest. At this time, the staff can insert the heating seat 61 between the movable plate 44 and the assembly plate 41, and use the annular heating film 63 on the heating seat 61 to heat the cylindrical battery. For the heating seat 61, it is fixed between the movable plate 44 and the assembly plate 41 by the fixing member, the pressing member and the limiting member. Specifically, when the heating seat After 61 is assembled in place, the staff aligns the limit block 94 with the limit opening 95 on the limit ring 93 and presses down the vertical rod 91. When the vertical rod 91 moves downward, it can drive the pressure block 83 to move downward. When the pressure block 83 moves downward, it can squeeze the two inclined inclined plates 82, so that the two clamping plates 73 move away from each other until the two clamping plates 73 press the assembly plate 41 and the movable plate 44 respectively. At this time, the two clamping plates 73 jointly fix the heating seat 61, thereby fixing the heating seat 61 between the assembly plate 41 and the movable plate 44. This fixing method is easy to operate and can ensure the stability of the heating seat 61 during operation.

[0031] When the vertical rod 91 moves downward, the limit block 94 on it will pass through the limit opening 95. When the limit block 94 moves to the bottom of the limit ring 93, the staff turns the knob on the top of the vertical rod 91 to make the vertical rod 91 drive the limit block 94 to rotate until the limit block 94 and the limit opening 95 are staggered. In this case, the limit block 94 cannot pass through the limit opening 95 and move to the top of the limit ring 93. In addition, when the limit block 94 moves to the bottom of the limit ring 93, the limit block 94 will squeeze the movable ring 96, causing the movable ring 96 to move downward. When the movable ring 96 moves downward, it will squeeze the booster spring 97. Under the elastic force of the boost spring 97, the movable ring 96 always has a tendency to move upward, which makes the movable ring 96 always have a tendency to push the limit block 94 upward, that is, the limit block 94 also always has a tendency to move upward. Therefore, when the limit block 94 is staggered with the limit opening 95, the movable ring 96 can press the limit block 94 against the bottom surface of the limit ring 93, thereby fixing the position of the limit block 94. When the limit block 94 is fixed, the positions of the vertical rod 91, the pressure block 83 and the two clamping plates 73 will also be fixed. This design can ensure the fixing effect of the two clamping plates 73 on the heating seat 61.

[0032] It is worth noting that the specific structures and working principles of the first heating plate 3, the second heating plate 45 and the annular heating diaphragm 63 in the present invention are all prior arts, and will not be elaborated herein. The variable frequency microwave heating device proposed in the present invention has two usage states. In the first usage state, the staff can place the battery between two movable plates 44 close to each other in two adjacent second heating components, and use the several second heating plates 45 on the above two movable plates 44 to heat and dry the battery. In this state, the variable frequency microwave heating device can dry square batteries, soft-pack batteries and blade batteries. In the second usage state, the staff inserts the battery into the heating port 62, and uses the annular heating diaphragm 63 to heat and dry the battery. In this state, the variable frequency microwave heating device can dry cylindrical batteries. Therefore, the variable frequency microwave heating device proposed in the present invention can dry various common batteries on the market.

[0033] Reference Fig.11 The present invention also discloses a vacuum heating furnace. The vacuum heating device 11 uses the above-mentioned variable frequency microwave heating device inside. The vacuum heating furnace can provide a vacuum environment for the battery, thereby improving the heating efficiency of the device for the battery.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A variable frequency microwave heating device, characterized in that: It comprises an outer frame (1), a first heating component and a plurality of second heating components; The first heating assembly comprises two mounting plates (2) and a plurality of first heating plates (3), the two mounting plates (2) being respectively fixed at two ends of the interior of the outer frame (1), and the plurality of first heating plates (3) being respectively mounted on the two mounting plates (2); The plurality of second heating components are arranged between two mounting plates (2), and the plurality of second heating components are distributed in a linear array. Each of the second heating components is composed of a first heating element and an adjusting element. The first heating element comprises an assembly plate (41) and two movable plates (44). The two movable plates (44) are respectively arranged on both sides of the assembly plate (41). Each of the movable plates (44) is mounted with a plurality of second heating plates (45). The adjusting element is arranged on the top of the assembly plate (41) and is used to adjust the distance between the two movable plates (44). The assembly plate (41) is fixed with a plurality of positioning frames (10), and each of the positioning frames (10) is in a U-shaped structure.

2. The variable frequency microwave heating device according to claim 1, characterized in that: The first heating element further comprises two mounting openings (42) and two elastic connecting members (43); the two mounting openings (42) are respectively opened at two ends of the assembly plate (41); the two elastic connecting members (43) are respectively arranged in the two mounting openings (42); and the two movable plates (44) are connected via the two elastic connecting members (43).

3. The variable frequency microwave heating device according to claim 2, characterized in that: The elastic connecting member (43) comprises a cylinder and two connecting rods. The cylinder is fixed in the mounting opening (42). Both ends of the cylinder are open. The two connecting rods are slidably arranged in the cylinder. The ends of the two connecting rods that are away from each other extend to the outside of the cylinder. The ends of the two connecting rods that are away from each other are fixedly connected to two movable plates (44) respectively. The ends of the two connecting rods that are close to each other are connected via a connecting spring.

4. The variable frequency microwave heating device according to claim 3, characterized in that: The adjusting member comprises a fixing frame (51), an adjusting screw (52), a movable plate (53), two extrusion plates (54) and two push rods (55); the fixing frame (51) is in a U-shaped structure, and the fixing frame (51) is fixed to the top surface of the assembly plate (41); the adjusting screw (52) passes through the fixing frame (51) and is threadedly connected to the fixing frame (51); the movable plate (53) is rotatably mounted on the bottom end of the adjusting screw (52); the two extrusion plates (54) are both fixed to the bottom surface of the movable plate (53), and the two extrusion plates (54) are respectively arranged on the assembly plate (41) ), each of the extrusion plates (54) is provided with an inclined surface, the inclined surfaces of the two extrusion plates (54) are respectively arranged opposite to the two movable plates (44), the two push rods (55) are respectively fixed on the opposite sides of the two movable plates (44), the two push rods (55) are respectively arranged opposite to the two extrusion plates (54), the fixed frame (51) is provided with two guide openings, the two sides of the movable plate (53) are fixed with guide strips, the ends of the two guide strips away from the movable plate (53) respectively extend into the two guide openings, and the two guide strips respectively slide in the two guide openings.

5. The variable frequency microwave heating device according to claim 1, characterized in that: A plurality of third heating components are arranged on each of the assembly plates (41), the plurality of third heating components are distributed on both sides of the assembly plate (41), and each of the third heating components comprises a second heating element, a fixing element, a pressing element and a limiting element; Wherein, the fixing member comprises a side plate (71) and two movable clamping plates (73), and the two clamping plates (73) are both slidably assembled on the side plate (71); The pressing member and the limiting member are both arranged on the side plate (71); the pressing member is used to drive the two pressing plates (73) to move; and the limiting member is used to provide limiting for the two pressing plates (73).

6. The variable frequency microwave heating device according to claim 5, characterized in that: The second heating element comprises a heating seat (61), a heating port (62) and an annular heating diaphragm (63); the heating seat (61) is mounted on a side of the assembly plate (41); the heating port (62) is opened on the heating seat (61); and the annular heating diaphragm (63) is mounted inside the heating port (62).

7. The variable frequency microwave heating device according to claim 5, characterized in that: The fixing member further comprises a through slot (72), wherein the through slot (72) is formed on a side surface of the side plate (71), and the two clamping plates (73) are both slidably disposed in the through slot (72), and ends of the two clamping plates (73) that are away from each other extend to the outside of the through slot (72).

8. The variable frequency microwave heating device according to claim 7, characterized in that: The pressing member comprises a slot (81), two inclined plates (82) and a pressing block (83); the slot (81) is formed on the slot wall of the through slot (72); the two inclined plates (82) are respectively fixed to the side surfaces of the two pressing plates (73); the two inclined plates (82) are both inclined, and the inclination directions of the two inclined plates (82) are opposite; the pressing block (83) is slidably arranged in the slot (81); the pressing block (83) is arranged above the two inclined plates (82), and the pressing block (83) is arranged opposite to the two inclined plates (82).

9. The variable frequency microwave heating device according to claim 8, characterized in that: The limiting member comprises a vertical rod (91), two connecting rods (92), a limiting ring (93), a limiting block (94) and a movable ring (96); a through hole connected to the slot (81) is formed on the top surface of the side plate (71); the vertical rod (91) slides in the through hole; the bottom end of the vertical rod (91) is rotatably connected to the pressing block (83); a knob is fixed to the top end of the vertical rod (91); the two connecting rods (92) are fixed to the top surface of the side plate (71); the limiting ring (93) is fixed to the two connecting rods (92) ), and the limiting ring (93) is sleeved on the vertical rod (91), the limiting block (94) is fixed on the outer peripheral surface of the vertical rod (91), the limiting block (94) is placed above the limiting ring (93), the limiting ring (93) is provided with a limiting opening (95) adapted to the limiting block (94), the movable ring (96) is slidably sleeved on the vertical rod (91), the movable ring (96) is connected to the top surface of the side plate (71) via a pressure-boosting spring (97), and the movable ring (96) is located below the limiting ring (93).

10. A vacuum heating furnace, characterized in that: It comprises a vacuum heating device (11), wherein the vacuum heating device (11) adopts a variable frequency microwave heating device as claimed in any one of claims 1 to 9.

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