Contact type baking device for lithium battery

Abstract

The utility model discloses a contact type baking device of a lithium battery, which relates to the technical field of lithium battery drying, and comprises a drying cylinder, an air exhaust mechanism, a driving mechanism, a heating mechanism, an air inlet pipe and a placing box, the air exhaust mechanism is arranged on the drying cylinder and is partially positioned in the drying cylinder, the placing box is arranged in the drying cylinder, and the driving mechanism is arranged on the drying cylinder. The multiple containing boxes are installed on the outer edge of the air exhaust mechanism and communicate with the air exhaust mechanism, an air inlet pipe is arranged on one side of the drying cylinder, a heating mechanism is arranged on the inner wall of the drying cylinder, and a driving mechanism is arranged at the lower end of the drying cylinder and is in driving connection with the air exhaust mechanism. According to the lithium battery drying device, water vapor in air in the containing box can be absorbed and removed, meanwhile, nitrogen is filled into the drying cylinder through the air inlet pipe, the nitrogen enters the containing box from the air inlet, the periphery of a lithium battery is filled with the nitrogen, meanwhile, the nitrogen is heated through the arranged electric heating pipe, and moisture in the lithium battery is further removed by means of the characteristic that the nitrogen is dry gas.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery drying, in particular to a contact type baking device for lithium batteries. Background Art

[0002] Lithium batteries include steel shell batteries, aluminum shell batteries, and plastic shell batteries. They are widely used in electric bicycles, electric motorcycles, electric vehicles, power tools, electric toys, solar photovoltaic power generation systems, wind power generation systems, mobile communication base stations, large servers, backup UPS power supplies, emergency lighting, portable mobile power supplies, and mine safety equipment due to their advantages of being lighter, thinner, having a long cycle life, good safety performance, high energy density, stable discharge platform, excellent power performance, and being environmentally friendly and pollution-free.

[0003] Patent No. CN107819158A in the prior art discloses a battery cell baking fixture and a method for baking a battery cell. The patent can perform drying work on lithium batteries in and out. The invention discloses a method for baking a battery cell using a phase change material. First, a battery cell baking fixture having a phase change material layer is heated and vacuumized, and the temperature of the fixture is maintained by the constant temperature characteristics of the phase change material. After the battery cell baking fixture has finished baking the battery cell, the battery cell can be taken out. The invention also discloses a battery cell baking fixture, including a fixture body and a cover plate. The fixture body is a concave structure, and the concave structure is separated by a partition to form a plurality of independent battery cell cavities. Phase change material layers are respectively provided in the battery cell cavity and the cover plate. The cover plate is detachably sealed and connected to the fixture body. Not only can the phase change material be recycled, but also due to the characteristics of the phase change material, the temperature in the fixture space can be kept relatively constant during the heat release process, so that the drying effect is better; at the same time, the independent battery cell cavities enable the battery cell baking fixture of the present invention to bake multiple battery cells at the same time, thereby ensuring the efficiency of battery cell baking.

[0004] However, in the prior art, the evaporation rate of water in the battery cell is increased by vacuuming, but after the water evaporates into water vapor, some water vapor still remains around the lithium battery. When the device stops baking, the water vapor liquefies again and remains in the lithium battery, resulting in incomplete drying. Utility Model Content

[0005] The purpose of the utility model is to provide a contact baking device for lithium batteries, so as to solve the above technical problems.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A contact baking device for lithium batteries comprises a drying cylinder, an exhaust mechanism, a driving mechanism, a heating mechanism, an air inlet pipe and a placement box, wherein the exhaust mechanism is arranged on the drying cylinder, and the exhaust mechanism is partially located in the drying cylinder, the placement box is arranged in the drying cylinder, a plurality of the placement boxes are installed on the outer edge of the exhaust mechanism and are connected to the exhaust mechanism, the air inlet pipe is arranged on one side of the drying cylinder, the heating mechanism is arranged on the inner wall of the drying cylinder, the driving mechanism is arranged at the lower end of the drying cylinder, and the driving mechanism is connected to the exhaust mechanism by driving.

[0008] Preferably, the exhaust mechanism comprises a rotating drum, which is installed inside the drying drum, and the lower end of the rotating drum is rotatably connected to the lower inner wall of the drying drum, and a plurality of exhaust holes are opened on the outer peripheral wall of the rotating drum.

[0009] As a further preference, it further includes an air pump, which is arranged at the upper end of the drying drum and is connected to the rotating drum.

[0010] Preferably, a sealing cover is provided at the upper end of the placement box.

[0011] Preferably, an electric heating plate is provided on the lower inner wall of the placement box.

[0012] As a further preference, one end of the placement box is provided with a plurality of air inlet holes, the other end of the placement box is provided with air exhaust holes, the other end of the placement box is connected to the rotating drum, and the air exhaust holes are directly opposite to the air suction holes.

[0013] As a further preference, it further comprises a driving gear and a gear ring, wherein the gear ring is disposed at the lower end of the rotating drum, and the driving mechanism comprises a motor, wherein the driving gear is disposed on the motor shaft of the motor, and the driving gear is meshed with the gear ring.

[0014] Preferably, the heating mechanism comprises an electric heating tube, a plurality of mounting grooves are provided on the inner peripheral wall of the drying cylinder, and the electric heating tubes are arranged in the mounting grooves.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] In the utility model, when the lithium battery is dried, the electric heating plate performs contact heating on the lithium battery, and at the same time, the motor drives the rotating drum to rotate, and the rotating drum drives the placement box to rotate, and the vacuum pump absorbs the water vapor in the air in the placement box, and at the same time, nitrogen is filled into the drying drum through the air inlet pipe, and the nitrogen enters the placement box from the air inlet, and the nitrogen is filled around the lithium battery. At the same time, the electric heating tube is arranged to heat the nitrogen, and the moisture in the lithium battery is further removed by utilizing the characteristic of nitrogen as a dry gas. After several operations of vacuuming and filling with nitrogen, the moisture inside the lithium battery is completely removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the contact baking device of the lithium battery in the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the contact baking device for lithium batteries in the utility model. Figure 1 ;

[0019] Figure 3 It is a structural schematic diagram of the placement box in the utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the contact baking device for lithium batteries in the utility model. Figure 2 .

[0021] In the figure: 1. drying drum; 2. air inlet pipe; 3. placement box; 4. rotating drum; 5. air extraction hole; 6. air extraction pump; 7. sealing cover; 8. electric heating plate; 9. air inlet hole; 10. exhaust hole; 11. driving gear; 12. gear ring; 13. motor; 14. electric heating tube; 15. installation slot; 16. sealing door. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Figure 1 It is a structural schematic diagram of the contact baking device of the lithium battery in the utility model; Figure 2 This is a schematic diagram of the internal structure of the contact baking device for lithium batteries in the utility model. Figure 1 ; Figure 3 It is a structural schematic diagram of the placement box in the utility model; Figure 4 This is a schematic diagram of the internal structure of the contact baking device for lithium batteries in the utility model. Figure 2 . See Figures 1 to 4 As shown, a preferred embodiment is shown, which shows a contact baking device for lithium batteries, including a drying drum 1, an exhaust mechanism, a driving mechanism, a heating mechanism, an air inlet pipe 2 and a placement box 3. The exhaust mechanism is arranged on the drying drum 1, and the exhaust mechanism is partially located in the drying drum 1. The drying drum 1 is provided with a placement box 3, and a plurality of placement boxes 3 are installed on the outer edge of the exhaust mechanism and are connected to the exhaust mechanism. An air inlet pipe 2 is arranged on one side of the drying drum 1, a heating mechanism is arranged on the inner wall of the drying drum 1, and a driving mechanism is arranged at the lower end of the drying drum 1, and the driving mechanism is connected to the exhaust mechanism. In this embodiment, see Figure 4 As shown, the exhaust device can extract the air inside the drying drum 1 to facilitate taking away the water vapor inside the drying drum 1, and the air inlet pipe 2 is used to connect with the external nitrogen supply device to pump nitrogen into the drying drum 1. The heating mechanism is used to heat the nitrogen so that the lithium battery can be dried when the nitrogen contacts the lithium battery. The driving mechanism is used to drive the exhaust mechanism to rotate, so that the exhaust mechanism drives the placement box 3 to rotate, and the lithium battery is placed in the placement box 3.

[0026] Further, as a preferred embodiment, the air extraction mechanism includes a rotary drum 4, which is installed inside the drying drum 1, and the lower end of the rotary drum 4 is rotatably connected to the lower inner wall of the drying drum 1, and a plurality of air extraction holes 5 are opened on the outer peripheral wall of the rotary drum 4. Figure 1As shown, an air pump 6 is also provided at the upper end of the drying drum 1, and the air pump 6 is connected to the inside of the rotating drum 4. The air pump 6 can generate negative pressure inside the rotating drum 4, so that nitrogen can enter the rotating drum 4 after passing through the placement box 3, and the nitrogen in the rotating drum 4 is extracted by the air pump 6. Among them, the lower end and the upper end of the rotating drum 4 are closed, and the lower end and the upper end of the rotating drum 4 can be rotatably connected to the inner wall of the drying drum 1 through a rotating shaft, and the air pump 6 can be connected to the inside of the rotating drum 4 through an air pipe.

[0027] Further, as a preferred embodiment, a sealing cover 7 is provided at the upper end of the placement box 3. Figure 2 As shown, the sealing cover 7 can be hingedly arranged on the upper end of the placement box 3.

[0028] Further, as a preferred embodiment, an electric heating plate 8 is provided on the lower inner wall of the placement box 3. The provided electric heating plate 8 can be in direct contact with the lithium battery to heat the lithium battery and dry the lithium battery.

[0029] Further, as a preferred embodiment, a plurality of air inlet holes 9 are provided at one end of the placement box 3, an exhaust hole 10 is provided at the other end of the placement box 3, the other end of the placement box 3 is connected to the rotating drum 4, and the exhaust hole 10 is directly opposite to the air extraction hole 5. A humidity sensor is provided in one of the air extraction holes 5 to detect the humidity of the air entering the air extraction hole 5, so as to judge the drying degree of the lithium battery. In this embodiment, a humidity sensor can also be provided in each air extraction hole 5.

[0030] Further, as a preferred embodiment, it also includes a driving gear 11 and a gear ring 12. The lower end of the drum 4 is provided with a gear ring 12. The driving mechanism includes a motor 13. The motor 13 shaft of the motor 13 is provided with a driving gear 11. The driving gear 11 is meshed with the gear ring 12. Figure 4 As shown, a chamber for installing a motor 13 is opened inside the lower end of the drying drum 1. The motor 13 drives the driving gear 11 to drive the gear ring 12 to drive the rotating drum 4 to rotate, and the rotating drum 4 drives the placement box 3 to rotate, thereby allowing the air in the drying drum 1 to flow, so that the lithium batteries are heated evenly and dried more thoroughly.

[0031] Further, as a preferred embodiment, the heating mechanism includes an electric heating tube 14, and a plurality of mounting grooves 15 are provided on the inner wall of the drying drum 1, and the electric heating tube 14 is provided in the mounting groove 15. The electric heating tube 14 is used to heat the nitrogen inside the drying drum 1, wherein the heating temperature of the electric heating tube 14 and the electric heating plate 8 can be set as required.

[0032] In this embodiment, a PLC controller is also included. The PLC controller can be arranged on the side wall of the drying drum 1 or in an external control room, wherein the electric heating tube 14, the motor 13, the electric heating plate 8 and the humidity sensor are all connected to the PLC controller.

[0033] See also Figure 1 As shown, a sealing door 16 is provided on the side wall of the drying drum 1, and the sealing door 16 is hinged to the side wall of the drying drum 1. The drying drum 1 can be closed or opened through the sealing door 16. The setting of the sealing door 16 also facilitates the placement or removal of lithium batteries, and the placement box 3 and the rotating drum 4 are welded and connected.

[0034] When in use, multiple lithium batteries are placed in the placement box 3 in sequence, and then the sealing cover 7 is covered, and then the sealing door 16 is closed, and the electric heating plate 8 is started to contact heat the lithium batteries, and then the motor 13 drives the driving gear 11 to rotate, the driving gear 11 drives the gear ring 12 to rotate, the gear ring 12 drives the rotating drum 4 to rotate, and the rotating drum 4 drives the placement box 3 to rotate, so that the air in the drying drum 1 flows, the lithium batteries are heated evenly, and the drying is more thorough. At the same time, nitrogen is rushed into the drying drum 1 through the air inlet pipe 2, and the electric heating pipe 14 provided at the same time generates heat to heat the nitrogen. Under the action of the vacuum pump 6, the nitrogen enters the placement box 3 from the air inlet hole 9 to dry the lithium batteries. The water vapor generated by the drying is brought into the rotating drum 4 through the exhaust hole 10 and the vacuum hole 5 to prevent the water vapor from remaining in the placement box 3, and then discharged to the outside through the vacuum pump 6, and the humidity sensor detects the appropriateness of the air entering the vacuum hole 5, so as to judge the drying degree of the lithium batteries.

[0035] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A contact baking device for lithium batteries, characterized in that: It includes a drying cylinder, an exhaust mechanism, a driving mechanism, a heating mechanism, an air inlet pipe and a placement box. The exhaust mechanism is arranged on the drying cylinder, and the exhaust mechanism is partially located in the drying cylinder. The placement box is arranged in the drying cylinder, and a plurality of the placement boxes are installed on the outer edge of the exhaust mechanism and are connected with the exhaust mechanism. The air inlet pipe is arranged on one side of the drying cylinder, the heating mechanism is arranged on the inner wall of the drying cylinder, and the driving mechanism is arranged at the lower end of the drying cylinder, and the driving mechanism is connected to the exhaust mechanism.

2. The contact baking device for lithium batteries according to claim 1, characterized in that: The air extraction mechanism comprises a rotating drum, which is installed inside the drying drum, and the lower end of the rotating drum is rotatably connected to the lower inner wall of the drying drum, and a plurality of air extraction holes are opened on the outer peripheral wall of the rotating drum.

3. The contact baking device for lithium batteries according to claim 2, characterized in that: It also includes an air pump, which is arranged at the upper end of the drying cylinder and is connected to the rotating cylinder.

4. The contact baking device for lithium batteries according to claim 1, characterized in that: A sealing cover is arranged on the upper end of the placing box.

5. The contact baking device for lithium batteries according to claim 1, characterized in that: An electric heating plate is arranged on the lower inner wall of the placing box.

6. The contact baking device for lithium batteries according to claim 2, characterized in that: One end of the placing box is provided with a plurality of air inlet holes, the other end of the placing box is provided with air exhaust holes, the other end of the placing box is connected to the rotating drum, and the air exhaust holes are directly opposite to the air extraction holes.

7. The contact baking device for lithium batteries according to claim 2, characterized in that: It also includes a driving gear and a gear ring. The gear ring is arranged at the lower end of the rotating drum. The driving mechanism includes a motor. The motor shaft of the motor is provided with the driving gear. The driving gear is meshed with the gear ring.

8. The contact baking device for lithium batteries according to claim 1, characterized in that: The heating mechanism comprises an electric heating tube. A plurality of mounting grooves are provided on the inner peripheral wall of the drying cylinder, and the electric heating tubes are arranged in the mounting grooves.

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