A variable-frequency microwave heating device and a vacuum heating furnace

Abstract

The present invention relates to the technical field of battery cell drying, and discloses a variable-frequency microwave heating device and a vacuum heating furnace, which include an outer frame body, a first heating component and a plurality of second heating components; wherein, the first heating component includes two mounting plates and a plurality of first heating plates, the two mounting plates are respectively fixed at both ends inside the outer frame body, and the plurality of first heating plates are respectively mounted on the two mounting plates. The variable-frequency microwave heating device proposed by the present invention replaces the structure of the traditional fixed heating device, greatly expands the versatility of the device, eliminates the need to prepare heating devices of different specifications to adapt to batteries of various shapes, reduces the equipment cost and space occupation, improves the production efficiency and equipment utilization rate, and brings significant convenience and economic benefits to the lithium battery production industry.

Description

Technical Field

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

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

[0003] Common lithium batteries on the market can basically be divided into square batteries, soft-pack batteries, cylindrical batteries, and blade batteries. Among them, square batteries, soft-pack batteries, and blade batteries are in the shape of sheets or plates, while cylindrical batteries are in a columnar structure. However, the existing battery drying equipment in the prior art can usually only dry a certain type of battery, and its versatility is poor and it cannot be applied to batteries of different shapes. For example, the Chinese patent with the publication number CN105180643A discloses a lithium battery drying rack, a lithium battery drying device, and a method for drying lithium batteries, belonging to the technical field of lithium-ion batteries. It includes a drying rack body, which includes a drying rack cross beam extending in the front-rear direction and battery trays fixedly arranged on one side or both sides of the drying rack cross beam and extending in the left-right direction. A vacuum pumping pipeline for sealing connection with the air extraction port of the battery is fixedly arranged on the drying rack cross beam, and a limiting mechanism for keeping the battery in a sealed connection state with the vacuum pumping pipeline is fixedly arranged on the battery tray. The lithium battery drying rack proposed in the above solution improves the drying efficiency of lithium batteries and reduces the production cost. However, this solution has this shortcoming. This limitation results in the need to replace or adjust according to different battery shapes during use, increasing the complexity and cost of production operations, and at the same time reducing production efficiency and equipment utilization rate. Therefore, the existing battery drying equipment has obvious deficiencies in meeting the drying requirements of diverse 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 deficiencies existing in the prior art, and to propose a variable-frequency microwave heating device and a vacuum heating furnace.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A variable-frequency microwave heating device includes an outer frame body, a first heating component, and a plurality of second heating components;

[0008] Among them, the first heating component includes two mounting plates and a plurality of first heating plates. The two mounting plates are respectively fixed at both ends inside the outer frame body, and the plurality of first heating plates are respectively mounted on the two mounting plates;

[0009] Among them, a plurality of the second heating components are all arranged between the two mounting plates, and the plurality of second heating components are arranged in a linear array. Each second heating component 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. A plurality of second heating plates are respectively mounted on each movable plate. The adjusting element is arranged on the top of the assembly plate and is used to adjust the distance between the two movable plates. A plurality of positioning frames are fixed on the assembly plate, and each positioning frame has a U-shaped structure.

[0010] As a preferred technical solution of the present invention, the first heating element further includes two mounting ports and two elastic connecting pieces. The two mounting ports are respectively opened at both ends of the assembly plate, the two elastic connecting pieces are respectively arranged in the two mounting ports, and the two movable plates are connected by the two elastic connecting pieces.

[0011] As a preferred technical solution of the present invention, the elastic connecting piece includes a cylinder body and two connecting rods. The cylinder body is fixed in the mounting port. Both ends of the cylinder body are open. The two connecting rods are both slidably arranged in the cylinder body. The ends of the two connecting rods away from each other extend to the outside of the cylinder body. The ends of the two connecting rods away from each other are respectively fixedly connected to the two movable plates, and the ends of the two connecting rods close to each other are connected by a connecting spring.

[0012] As a preferred technical solution of the present invention, the adjusting element includes a fixing frame, an adjusting screw, a moving plate, two pressing plates and two ejector rods. The fixing frame has a U-shaped structure and is fixed on the top surface of the assembly plate. The adjusting screw passes through the fixing frame and is threadedly connected to the fixing frame. The moving plate is rotatably mounted at the bottom end of the adjusting screw. The two pressing plates are both fixed on the bottom surface of the moving plate, and the two pressing plates are respectively arranged on both sides of the assembly plate. Each pressing plate is provided with an inclined surface. The inclined surfaces of the two pressing plates are respectively arranged facing the two movable plates. The two ejector rods are respectively fixed on the opposite side surfaces of the two movable plates, and the two ejector rods are respectively arranged facing the two pressing plates. Two guiding ports are opened on the fixing frame. Guide bars are respectively fixed on both sides of the moving plate. The ends of the two guide bars away from the moving plate respectively extend into the two guiding ports, and the two guide bars are respectively slidable in the two guiding ports.

[0013] As a preferred technical solution of the present invention, a number of third heating components are provided on each of the assembly plates, and the number of the third heating components are distributed on both sides of the assembly plate. Each of the third heating components includes a second heating element, a fixing member, a pressing member and a limiting member;

[0014] Wherein, the fixing member includes a side plate and two movable pressing plates, and the two pressing plates are both slidably assembled on the side plate;

[0015] 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 limits for the two pressing plates.

[0016] As a preferred technical solution of the present invention, the second heating element includes a heating base, a heating port and an annular heating diaphragm. The heating base is installed on the side of the assembly plate, the heating port is opened on the heating base, and the annular heating diaphragm is installed inside the heating port.

[0017] As a preferred technical solution of the present invention, the fixing member further includes a through groove, the through groove is opened on the side of the side plate, the two pressing plates are both slidably arranged in the through groove, and one ends of the two pressing plates away from each other both extend to the outside of the through groove.

[0018] As a preferred technical solution of the present invention, the pressing member includes a slot, two inclined plates and a pressing block. The slot is opened on the groove wall of the through groove, the two inclined plates are respectively fixed on the sides of the two pressing plates, the two inclined plates are both inclined, and the inclined directions of the two inclined plates are opposite. The pressing block is slidably arranged in the slot, the pressing block is arranged above the two inclined plates, and the pressing block is arranged opposite to the two inclined plates.

[0019] As a preferred technical solution of the present invention, the limiting member includes a vertical rod, two connecting rods, a limiting ring, a limiting block and a movable ring. A through hole communicating with the slot is opened on the top surface of the side plate, the vertical rod slides in the through hole, the bottom end of the vertical rod is rotatably connected with the pressing block, a knob is fixed at the top end of the vertical rod, the two connecting rods are both fixed on the top surface of the side plate, the limiting ring is fixed between the two connecting rods, and the limiting ring is sleeved on the vertical rod. The limiting block is fixed on the outer peripheral surface of the vertical rod, the limiting block is arranged above the limiting ring, a limiting opening adapted to the limiting block is opened on the limiting ring, the movable ring is slidably sleeved on the vertical rod, and the movable ring is connected with the top surface of the side plate through a boosting spring, and the movable ring is located below the limiting ring.

[0020] A vacuum heating furnace includes a vacuum heating device, and the vacuum heating device adopts the above-mentioned variable-frequency microwave heating device.

[0021] The present invention has the following beneficial effects:

[0022] 1. The variable-frequency microwave heating device proposed by the present invention has two usage states, which can flexibly adapt to batteries of different shapes for drying treatment. In the first usage state, through the movable plates and the second heating plates thereon in two adjacent second heating components, square batteries, soft-pack batteries, and blade batteries can be effectively heated and dried. In the second usage state, by using the annular heating diaphragm in the heating port, cylindrical batteries can be heated and dried. 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 various shapes, reducing equipment costs and space occupancy, improving production efficiency and equipment utilization rate, and bringing significant convenience and economic benefits to the lithium battery production industry;

[0023] 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 plate-shaped batteries of different sizes for heating treatment. The staff only needs to rotate the handwheel on the adjusting screw to drive the adjusting screw to move, and drive the moving plate to move stably along the guiding port and guiding strip. The movement of the moving plate further drives the two pressing plates to move synchronously. By pressing or releasing the ejector rod on the movable plate through the inclined surface on the pressing plate, the two movable plates can be moved away from or close to each other. This adjustment mechanism is not only easy to operate but also greatly improves the applicable range and flexibility of the device, enabling the same device to 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 operation complexity, and enhancing production efficiency and equipment utilization rate;

[0024] 3. The first heating component arranged inside the outer frame body is fixed and installs several first heating plates through two mounting plates, and cooperates with the second heating plates to achieve comprehensive heating and drying of the batteries. This design enables the movable plates at both ends of the outer frame body to also play a full heating role, improving the heating efficiency. At the same time, due to the addition of the first heating component, more batteries can be placed inside the outer frame body, so that more batteries can be processed in a limited space, significantly enhancing the battery processing efficiency. This design not only optimizes the equipment space utilization but also improves production efficiency and equipment production capacity, bringing a substantial improvement to the lithium battery production industry;

[0025] 4. When heating a cylindrical battery, the design can effectively heat the cylindrical battery by flexibly adjusting the position of the movable plate and inserting it into the heating base. Through the ingenious design of the fixing piece, the pressing piece and the limiting piece, the heating base can be conveniently and stably fixed between the movable plate and the assembly plate. In the specific operation, the cooperation between the limiting block and the limiting ring, as well as the linkage mechanism of the vertical rod, the pressing block and the pressing plate, not only make the installation process of the heating base simple and fast, but also ensure the stability of the heating base during operation. At the same time, the design of the boosting spring and the movable ring provides a reliable fixing effect for the limiting block, further ensuring the firm fixing of the heating base by the two pressing plates. This design not only improves the applicability and flexibility of the equipment, enabling the same device to process batteries of different shapes, but also optimizes the operation process, improves work efficiency and equipment reliability, bringing significant convenience and benefits to the production of lithium batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of a variable-frequency microwave heating device proposed by the present invention;

[0027] Figure 2 is a schematic structural diagram of another state of a variable-frequency microwave heating device proposed by the present invention;

[0028] Figure 3 is a schematic structural diagram of the second heating component;

[0029] Figure 4 is a schematic structural diagram of the assembly plate and several third heating components;

[0030] Figure 5 is a schematic structural diagram of the assembly plate, two movable plates and the connecting piece;

[0031] Figure 6 is a schematic structural diagram of the second heating element;

[0032] Figure 7 is a sectional structural diagram of the second heating element;

[0033] Figure 8 is Figure 4 an enlarged view of the structure at position A of

[0034] Figure 9 is Figure 6 an enlarged view of the structure at position B of

[0035] Figure 10 is Figure 5 an enlarged view of the structure at position C of

[0036] Figure 11 is a schematic structural diagram of a vacuum heating furnace proposed by the present invention.

[0037] In the figure: 1. Outer frame; 2. Mounting plate; 3. First heating plate; 41. Assembly plate; 42. Mounting opening; 43. Elastic connecting piece; 44. Movable plate; 45. Second heating plate; 51. Fixed frame; 52. Adjusting screw; 53. Movable plate; 54. Extrusion plate; 55. Thrust rod; 61. Heating base; 62. Heating opening; 63. Annular heating diaphragm; 71. Side plate; 72. Through groove; 73. Pressing plate; 81. Groove; 82. Inclined plate; 83. Pressing block; 91. Vertical rod; 92. Connecting rod; 93. Limiting ring; 94. Limiting block; 95. Limiting opening; 96. Movable ring; 97. Boosting spring; 10. Positioning frame; 11. Vacuum heating device. Detailed implementation mode

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0039] Referring to Figures 1 - 10 , a variable-frequency microwave heating device includes an outer frame 1, a first heating assembly and several second heating assemblies. The first heating assembly includes two mounting plates 2 and several first heating plates 3. The two mounting plates 2 are respectively fixed at both ends inside the outer frame 1, and several first heating plates 3 are respectively mounted on the two mounting plates 2.

[0040] Several second heating assemblies are all arranged between the two mounting plates 2, and several second heating assemblies are arranged in a linear array. Each second heating assembly is composed of a first heating element and an adjusting element. The first heating element includes 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. Several second heating plates 45 are respectively mounted on each movable plate 44. The first heating element also includes two mounting openings 42 and two elastic connecting pieces 43. The two mounting openings 42 are respectively opened at both ends of the assembly plate 41. The two elastic connecting pieces 43 are respectively arranged in the two mounting openings 42. The two movable plates 44 are connected to each other through the two elastic connecting pieces 43. The elastic connecting piece 43 includes a cylinder body and two connecting rods. The cylinder body is fixed in the mounting opening 42. Both ends of the cylinder body are open. The two connecting rods are both slidably arranged in the cylinder body. The ends of the two connecting rods away from each other both extend to the outside of the cylinder body. The ends of the two connecting rods away from each other are respectively fixed to the two movable plates 44. The ends of the two connecting rods close to each other are connected through a connecting spring.

[0041] The adjusting member is arranged on the top of the mounting 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 mounting plate 41, and each positioning frame 10 has a U-shaped structure. The adjusting member includes a fixed frame 51, an adjusting screw 52, a moving plate 53, two pressing plates 54 and two ejector rods 55. The fixed frame 51 has a U-shaped structure and is fixed on the top surface of the mounting plate 41. The adjusting screw 52 passes through the fixed frame 51 and is threadedly connected to the fixed frame 51. The moving plate 53 is rotatably mounted at the bottom end of the adjusting screw 52. The two pressing plates 54 are both fixed on the bottom surface of the moving plate 53, and the two pressing plates 54 are respectively arranged on both sides of the mounting plate 41. An inclined surface is provided on each pressing plate 54, and the inclined surfaces of the two pressing plates 54 are respectively arranged facing the two movable plates 44. The two ejector rods 55 are respectively fixed on the opposite side surfaces of the two movable plates 44, and the two ejector rods 55 are respectively arranged facing the two pressing plates 54. Two guiding openings are formed in the fixed frame 51. Guide bars are respectively fixed on both sides of the moving plate 53. One ends of the two guide bars away from the moving plate 53 respectively extend into the two guiding openings, and the two guide bars respectively slide in the two guiding openings. When adjusting the distance between the two movable plates 44 in the first heating member, the staff can rotate the handwheel on the adjusting screw 52 to make the adjusting screw 52 rotate. When the adjusting screw 52 rotates, it can move and drive the moving plate 53 to move. During the movement of the moving plate 53, the two guiding openings and the two guide bars play a role in limiting the movement of the moving plate 53 to ensure the stability of the moving plate 53 during the movement. When the moving plate 53 moves, the two pressing plates 54 thereon will move synchronously. When the two pressing plates 54 move downward, the inclined surfaces on the two pressing plates 54 respectively press the ejector rods 55 on the two movable plates 44. At this time, the two ejector rods 55 will drive the two movable plates 44 to move away from each other. When the two pressing plates 54 move upward, the two pressing plates 54 no longer press the two ejector rods 55. At this time, the two movable plates 44 will approach each other under the action of the two elastic connecting members 43. Therefore, the staff can adjust the positions of the two movable plates 44 by rotating the adjusting screw 52.

[0042] A plurality of third heating assemblies are arranged on each mounting plate 41, and the plurality of third heating assemblies are distributed on both sides of the mounting plate 41. Each third heating assembly includes a second heating member, a fixing member, a pressing member and a limiting member. The second heating member includes a heating base 61, a heating opening 62 and an annular heating film 63. The heating base 61 is installed on the side surface of the mounting plate 41. The heating opening 62 is formed in the heating base 61. The annular heating film 63 is installed inside the heating opening 62.

[0043] The fixing member includes a side plate 71 and two movable pressing plates 73. Both of the two pressing plates 73 are slidably assembled on the side plate 71. The fixing member further includes a through groove 72 which is opened on the side surface of the side plate 71. Both of the two pressing plates 73 are slidably arranged in the through groove 72, and one end of each of the two pressing plates 73 away from each other extends to the outside of the through groove 72.

[0044] 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 limitation for the two pressing plates 73. The pressing member includes a slotted opening 81, two inclined plates 82 and a pressing block 83. The slotted opening 81 is opened on the groove wall of the through groove 72. The two inclined plates 82 are respectively fixed on the side surfaces of the two pressing plates 73. Both of 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 slotted opening 81. The pressing block 83 is arranged above the two inclined plates 82 and is disposed right opposite to the two inclined plates 82. 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. A through opening communicating with the slotted opening 81 is opened on the top surface of the side plate 71. The vertical rod 91 slides in the through opening. The bottom end of the vertical rod 91 is rotatably connected to the pressing block 83. A knob is fixed at the top end of the vertical rod 91. The two connecting rods 92 are both fixed on the top surface of the side plate 71. The limiting ring 93 is fixed between the two connecting rods 92 and 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. A limiting opening 95 adapted to the limiting block 94 is opened on the limiting ring 93. 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 boosting spring 97, and the movable ring 96 is located below the limiting ring 93. After the heating base 61 is assembled in place, the staff aligns the limiting block 94 with the limiting opening 95 on the limiting ring 93 and presses down the vertical rod 91. 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 plates 82 arranged obliquely, so that the two pressing plates 73 move away from each other until the two pressing plates 73 respectively press the assembling plate 41 and the movable plate 44. At this time, the two pressing plates 73 jointly play a role in fixing the heating base 61, so as to fix the heating base 61 between the assembling plate 41 and the movable plate 44. This fixing method is convenient to operate and can ensure the stability of the heating base 61 during the working process.

[0045] The specific working principle of the present invention is as follows:

[0046] The variable-frequency microwave heating device proposed by the present invention has two usage states. In the first usage state, the staff can place the battery between two adjacent movable plates 44 that are close to each other in two second heating components, and use a number of second heating plates 45 on the two movable plates 44 to heat and dry the battery. In this state, the variable-frequency microwave heating device can perform drying treatment on 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 film 63 to heat and dry the battery. In this state, the variable-frequency microwave heating device can perform drying treatment on cylindrical batteries. Therefore, the variable-frequency microwave heating device proposed by the present invention can perform drying treatment on various common batteries on the market, replacing the structure of the traditional fixed heating device, expanding the versatility of the device, and eliminating the need to prepare heating devices of different specifications to adapt to batteries of different shapes.

[0047] For the second heating component, the distance between the two movable plates 44 in the first heating element provided therein can be adjusted. The staff can adjust the distance between the two adjacent movable plates 44 that are close to each other in two 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 rotate the handwheel on the adjusting screw 52, causing the adjusting screw 52 to rotate. When the adjusting screw 52 rotates, it can move and drive the moving plate 53 to move. During the movement of the moving plate 53, the two guiding ports and the two guiding strips play a role in limiting the movement of the moving plate 53, ensuring the stability of the moving plate 53 during movement. When the moving plate 53 moves, the two pressing plates 54 thereon will move synchronously. When the two pressing plates 54 move downward, the inclined surfaces on the two pressing plates 54 respectively press the ejector rods 55 on the two movable plates 44. At this time, the two ejector rods 55 will drive the two movable plates 44 to move away from each other. When the two pressing plates 54 move upward, the two pressing plates 54 no longer press the two ejector rods 55. At this time, the two movable plates 44 will approach each other under the action of the two elastic connecting members 43. Therefore, the staff can adjust the positions of the two movable plates 44 by rotating the adjusting screw 52, enabling the device to heat and process plate-shaped batteries of different sizes and expanding the applicable range of the device.

[0048] For the elastic connecting member 43, when the two movable plates 44 move, they drive the two connecting rods to move respectively, 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 also move away from each other. At this time, the two connecting rods will jointly stretch the connecting spring. When the two pressing plates 54 no longer press the two ejector rods 55, the two movable plates 44 will 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 movement of the two movable plates 44 and is also used for the automatic reset of the two movable plates 44.

[0049] In the present invention, in order to enable the movable plates 44 at both ends of the outer frame 1 to also play a heating role, a first heating component is further provided inside the outer frame 1. 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 both ends inside the outer frame 1, and the plurality of first heating plates 3 are respectively mounted on the two mounting plates 2. The first heating plates 3 and the second heating plates 45 can jointly heat and dry the battery, so that more batteries can be placed inside the outer frame 1, improving the processing efficiency of the batteries.

[0050] When heating a cylindrical battery, the staff first adjusts the movable plate 44 in a plurality of first heating members until the two adjacent movable plates 44 in the two second heating components that are close to each other are in contact with each other. 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 base 61 between the movable plate 44 and the assembly plate 41, and use the annular heating film 63 on the heating base 61 to heat the cylindrical battery. For the heating base 61, it is fixed between the movable plate 44 and the assembly plate 41 through a fixing member, a pressing member and a limiting member. Specifically, when the heating base 61 is assembled in place, the staff aligns the limiting block 94 with the limiting port 95 on the limiting ring 93 and presses down the vertical rod 91. 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 obliquely arranged inclined plates 82, so that the two pressing plates 73 move away from each other until the two pressing plates 73 respectively press the assembly plate 41 and the movable plate 44. At this time, the two pressing plates 73 jointly fix the heating base 61, thereby fixing the heating base 61 between the assembly plate 41 and the movable plate 44. This fixing method is convenient to operate and can ensure the stability of the heating base 61 during operation.

[0051] During the downward movement of the vertical rod 91, the limit block 94 thereon will pass through the limit opening 95. When the limit block 94 moves below the limit ring 93, the staff rotates the knob at the top of the vertical rod 91 to drive the vertical rod 91 to drive the limit block 94 to rotate until the limit block 94 is staggered from the limit opening 95. In this case, the limit block 94 cannot pass through the limit opening 95 and move above the limit ring 93. In addition, when the limit block 94 moves below 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 booster 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 from 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 pressing block 83 and the two pressing plates 73 will also be fixed. This design can ensure the fixing effect of the two pressing plates 73 on the heating base 61.

[0052] It should be noted that the specific structures and working principles of the first heating plate 3, the second heating plate 45 and the annular heating film 63 in the present invention are all prior arts and will not be elaborated here. The variable-frequency microwave heating device proposed by the present invention has two usage states. In the first usage state, the staff can place the battery between two adjacent movable plates 44 in two adjacent second heating components, and use a number of second heating plates 45 on the 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 film 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 by the present invention can dry various common batteries on the market.

[0053] Refer to Figure 11 , the present invention also discloses a vacuum heating furnace. The above variable-frequency microwave heating device is applied inside the vacuum heating device 11. The vacuum heating furnace can provide a vacuum environment for the battery, thereby improving the heating efficiency of the device for the battery.

[0054] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A variable-frequency microwave heating device, characterized in that, It includes an outer frame body (1), a first heating component and several second heating components; Among them, the first heating component includes two mounting plates (2) and several first heating plates (3). The two mounting plates (2) are respectively fixed at both ends inside the outer frame body (1), and several first heating plates (3) are respectively mounted on the two mounting plates (2); Among them, several second heating components are all arranged between the two mounting plates (2), and several second heating components are arranged in a linear array. Each second heating component is composed of a first heating element and an adjusting element. The first heating element includes 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). Several second heating plates (45) are respectively mounted on each movable plate (44). 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). Several positioning frames (10) are fixed on the assembly plate (41), and each positioning frame (10) is of a U-shaped structure; The first heating element further includes two mounting openings (42) and two elastic connecting pieces (43). The two mounting openings (42) are respectively opened at both ends of the assembly plate (41), and the two elastic connecting pieces (43) are respectively arranged in the two mounting openings (42). The two movable plates (44) are connected by the two elastic connecting pieces (43); The elastic connecting piece (43) includes a cylinder body and two connecting rods. The cylinder body is fixed in the mounting opening (42). Both ends of the cylinder body are open. The two connecting rods are both slidably arranged in the cylinder body. The ends of the two connecting rods away from each other both extend to the outside of the cylinder body. The ends of the two connecting rods away from each other are respectively fixedly connected to the two movable plates (44). The ends of the two connecting rods close to each other are connected by a connecting spring; The adjusting member includes a fixing frame (51), an adjusting screw (52), a moving plate (53), two pressing plates (54) and two ejector rods (55). The fixing frame (51) has a U-shaped structure and is fixed on the top surface of the assembling plate (41). The adjusting screw (52) passes through the fixing frame (51) and is threadedly connected to the fixing frame (51). The moving plate (53) is rotatably installed at the bottom end of the adjusting screw (52). The two pressing plates (54) are both fixed on the bottom surface of the moving plate (53), and the two pressing plates (54) are respectively arranged on both sides of the assembling plate (41). Each pressing plate (54) is provided with an inclined surface, and the inclined surfaces of the two pressing plates (54) are respectively arranged facing the two movable plates (44). The two ejector rods (55) are respectively fixed on the opposite side surfaces of the two movable plates (44), and the two ejector rods (55) are respectively arranged facing the two pressing plates (54). Two guiding openings are formed in the fixing frame (51). Guide bars are respectively fixed on both sides of the moving plate (53). The ends of the two guide bars away from the moving plate (53) respectively extend into the two guiding openings, and the two guide bars respectively slide in the two guiding openings.

2. The variable-frequency microwave heating device according to claim 1, wherein A plurality of third heating components are arranged on each assembling plate (41). The plurality of third heating components are distributed on both sides of the assembling plate (41). Each third heating component includes a second heating member, a fixing member, a pressing member and a limiting member. Among them, the fixing member includes a side plate (71) and two movable pressing plates (73). The two pressing plates (73) are both slidably assembled on the side plate (71). Among them, 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 limitation for the two pressing plates (73).

3. The variable-frequency microwave heating device according to claim 2, characterized in that, The second heating member includes a heating base (61), a heating opening (62) and an annular heating film (63). The heating base (61) is installed on the side surface of the assembling plate (41). The heating opening (62) is formed in the heating base (61). The annular heating film (63) is installed inside the heating opening (62).

4. The variable-frequency microwave heating device according to claim 3, characterized in that, The fixing member further includes a through groove (72). The through groove (72) is formed in the side surface of the side plate (71). The two pressing plates (73) are both slidably arranged in the through groove (72), and the ends of the two pressing plates (73) away from each other both extend outside the through groove (72).

5. The variable-frequency microwave heating device according to claim 4, wherein The pressing member includes a slot (81), two inclined plates (82) and a pressing block (83). The slot (81) is formed in the groove wall of the through groove (72). The two inclined plates (82) are respectively fixed on 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 is arranged facing the two inclined plates (82).

6. The variable-frequency microwave heating device according to claim 5, wherein, 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). A through hole communicating with the slot (81) is formed in 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 both fixed to the top surface of the side plate (71). The limiting ring (93) is fixed between the two connecting rods (92) and sleeved on the vertical rod (91). The limiting block (94) is fixed to the outer peripheral surface of the vertical rod (91). The limiting block (94) is located above the limiting ring (93). A limiting opening (95) adapted to the limiting block (94) is formed in the limiting ring (93). 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 pressure increasing spring (97), and the movable ring (96) is located below the limiting ring (93).

7. A vacuum heating furnace, characterized in that, It includes a vacuum heating device (11), and the vacuum heating device (11) adopts the variable frequency microwave heating device as described in any one of claims 1-6.

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