A contact baking device for lithium batteries

Abstract

The present invention belongs to the field of drying technology, and discloses a contact baking device for lithium batteries, including a vertical baking bin assembly, on which a vertical hanging arm assembly is arranged, and on which a bidirectional loading tray assembly is arranged, and the vertical hanging arm assembly forms a hanging arm structure for up and down heat equalizing action in the vertical baking bin assembly, and during the up and down heat equalizing action, the vertical hanging arm assembly itself forms a bidirectional annular heating heat equalizing structure. In the present invention, since the vertical hanging arm assembly is in an up and down reciprocating action on the vertical baking bin assembly, and cooperates with the annular and self-rotating structure of the vertical hanging arm assembly on the vertical baking bin assembly, during the up and down heat equalizing action, the vertical hanging arm assembly itself forms a bidirectional annular heating heat equalizing structure for baking lithium battery raw materials, and through the improvement of the above-mentioned double-layer baking structure, the heat equalizing performance of baking lithium battery raw materials is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of drying, and in particular relates to a contact baking device for a lithium battery. Background Art

[0002] There are two ways to bake lithium batteries according to the heating method, namely contact baking and hot air circulation baking. Hot air circulation baking is to heat the gas through a heating unit and then heat the battery through a circulation system. Contact baking is to bake the battery directly by the heating unit. Compared with hot air circulation baking, it has the characteristic of short baking cycle.

[0003] The existing technology has the following problems: contact baking is a method in which the heating unit directly bakes and heats the battery, but the contact baking currently has the following problems. On the one hand, it is inconvenient to load and unload lithium battery raw materials, and the existing contact baking equipment is large in size. On the other hand, the contact baking needs to be further improved in terms of baking uniformity, otherwise it is difficult to meet the existing production process. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a contact baking device for lithium batteries, which has the characteristics of good baking uniformity.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a contact baking device for lithium batteries, comprising a vertical baking bin assembly, a vertical boom assembly being provided on the vertical baking bin assembly, a bidirectional loading tray assembly being provided on the vertical boom assembly, the vertical boom assembly forming a boom structure for up and down heat equalizing action in the vertical baking bin assembly, during the up and down heat equalizing action, the vertical boom assembly itself forms a bidirectional annular heating heat equalizing structure, and the bottom of the vertical boom assembly forms a vacuum ventilation baking structure at the bottom of the vertical baking bin assembly, and the bidirectional loading tray assembly forms a coaxial inverted transposition loading tray structure on the vertical boom assembly.

[0006] In a preferred embodiment of a contact baking device for lithium batteries, the vertical baking bin assembly includes a baking bin, an exhaust pipe and an air bin are provided at the bottom of the baking bin, and a nitrogen inlet pipe, a support arm and a vertical arm are provided at the top of the baking bin, a guide rail boss is fixedly provided on the support arm, an air valve is provided on the nitrogen inlet pipe, a driving motor for driving a crank arm to rotate is provided on the vertical arm, a linkage arm is provided for rotation at the top of the crank arm, and closed doors are provided on both sides of the baking bin through the top push of a hinged cylinder;

[0007] The vertical boom assembly includes a boom, a piston plate and an air intake pipe are arranged at the bottom of the boom, and a center frustum and a ring arm are arranged at the top of the boom, a ring table is rotatably arranged on the ring arm through a bearing, a boom and a boom seat are fixedly arranged on the center frustum, an outer ring gear ring is fixedly arranged on the bottom end surface of the top of the boom, a support shaft tube is rotatably arranged on the center frustum through a bearing, a guide shaft ring and a center gear are fixedly arranged on the top and bottom of the support shaft tube respectively, a spiral guide rail groove is opened on the outer wall of the guide shaft ring, a plurality of edge gears are rotatably arranged on the bottom end surface of the ring table, and a plurality of heating rods are fixedly arranged on the edge gears;

[0008] The two-way loading tray assembly includes a fixed base arm, a hydraulic cylinder is fixedly arranged on the top of the fixed base arm, a pushing gear arm is fixedly arranged at one end of the hydraulic cylinder, an outer shaft arm tube and an inner shaft arm rod are rotatably arranged on one side of the top of the fixed base arm, a material tray driving gear and a first bevel gear are fixedly arranged on one end of the inner shaft arm rod, a third bevel gear is fixedly arranged on the outer shaft arm tube, a second bevel gear is rotatably arranged above the top of the fixed base arm through an L-shaped side arm, a second transposition arm and a fourth transposition arm are rotatably arranged on the top and bottom of one side of the top of the fixed base arm respectively, and the first transposition arm and the third transposition arm are rotatably arranged on the top and bottom of the other side of the top of the fixed base arm respectively, and a plurality of loading trays are hingedly arranged between the first transposition arm and the second transposition arm and the third transposition arm and the fourth transposition arm.

[0009] In a preferred embodiment of a contact baking device for lithium batteries, the suspension rod slides through the top of the baking chamber, and one side of the suspension rod seat is rotatably connected to the bottom of the linkage arm through an axle pin.

[0010] In a preferred embodiment of a contact baking device for lithium batteries, the support shaft tube is rotatably sleeved on the outside of the suspension rod, and the guide rail protrusion is inserted into the spiral guide rail slide groove.

[0011] In a preferred embodiment of a contact baking device for lithium batteries, the central gear, edge gear and outer ring gear are on the same horizontal plane, and two sides of the edge gear are respectively meshed with the central gear and the outer ring gear.

[0012] In a preferred embodiment of a contact baking device for lithium batteries, the piston plate moves up and down in the air chamber, and the exhaust pipe, the air intake pipe and the nitrogen air intake pipe are all provided with a one-way valve.

[0013] In a preferred embodiment of a contact baking device for lithium batteries, the second bevel gear is meshed with the first bevel gear and the third bevel gear on both sides respectively, the tray driving gear is meshed with the push gear arm, and the inner shaft arm rod rotates in the outer shaft arm tube.

[0014] In a preferred embodiment of a contact baking device for lithium batteries, the bottom of the first transposition arm is fixedly connected to the outer shaft arm tube, and the top of the third transposition arm is fixedly connected to the inner shaft arm rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the vertical boom assembly forms a boom structure with upper and lower heat equalization movements in the vertical baking bin assembly; during the upper and lower heat equalization movements, the vertical boom assembly itself forms a heat equalization structure with bidirectional cyclic heating, and the bottom of the vertical boom assembly forms a vacuum ventilation baking structure at the bottom of the vertical baking bin assembly; the bidirectional loading tray assembly forms a coaxial inverted position-changing loading tray structure on the vertical boom assembly; in actual use, the multiple loading trays at the top of the bidirectional loading tray assembly of the present invention swing forward to form a straight line, and the multiple loading trays at the bottom of the bidirectional loading tray assembly swing backward to form a straight line; in this way, the placement of lithium battery raw materials during baking is convenient; after the material is discharged, the vertical boom assembly of the present invention is in a position on the vertical baking bin assembly The vertical boom assembly reciprocates up and down, and cooperates with the annular and self-rotating structure of the vertical boom assembly on the vertical baking bin assembly. At this time, during the upper and lower heat equalization action process, the vertical boom assembly itself forms a two-way annular heating and heat equalization structure for baking the lithium battery raw materials. Through the improvement of the above-mentioned double-layer baking structure, the heat equalization performance of baking the lithium battery raw materials is greatly improved. The nitrogen inlet pipe of the present invention is connected to the external nitrogen supply equipment during actual use. When the vacuum degree in the vertical baking bin assembly reaches the rated value, the air valve opens the control of the air valve. A pressure sensing sensor can be set in the vertical baking bin assembly, and then the air valve is controlled by the existing control module. At this time, external nitrogen enters the baking bin, and during the piston action of the piston plate, the air flow and water vapor in the vertical baking bin assembly are smoothly discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of the present invention;

[0017] Figure 2 A three-dimensional diagram of another viewing angle of the present invention;

[0018] Figure 3 An exploded view of the present invention;

[0019] Figure 4 It is a three-dimensional diagram of the partial structure of the vertical baking chamber assembly of the present invention;

[0020] Figure 5 is a three-dimensional diagram of a vertical boom assembly of the present invention;

[0021] Figure 6 An exploded view of the vertical boom assembly of the present invention;

[0022] Figure 7 It is a three-dimensional diagram of the bidirectional loading tray assembly of the present invention;

[0023] Figure 8 An exploded view of the bidirectional loading tray assembly of the present invention;

[0024] In the figure: 100, vertical baking bin assembly; 101, baking bin; 102, gas bin; 103, exhaust pipe; 104, guide rail boss; 105, vertical arm; 106, drive motor; 107, curved arm; 108, linkage arm; 109, air valve; 110, nitrogen inlet pipe; 111, support arm; 200, vertical suspension arm assembly; 201, suspension arm; 202, piston plate; 203, inlet pipe; 204, ring arm; 205, ring platform; 206, center round platform; 207, suspension rod; 208, suspension rod seat; 209, guide rail shaft ring; 210, spiral guide rail slide; 211, suspension arm; 212, suspension arm; 213, suspension arm; 214, suspension arm; 215, suspension arm; 216, suspension arm; 217, suspension arm; 218, suspension arm seat; 219, guide rail shaft ring; 220, spiral guide rail slide; 221 1. Support shaft tube; 212. Edge gear; 213. Outer ring gear; 214. Center gear; 215. Heating rod; 300. Bidirectional loading tray assembly; 301. Fixed base arm; 302. Hydraulic cylinder; 303. Pushing gear arm; 304. Tray driving gear; 305. First bevel gear; 306. Second bevel gear; 307. Outer shaft arm tube; 308. L-shaped side arm; 309. Third bevel gear; 310. Inner shaft arm rod; 311. First transposition arm; 312. Second transposition arm; 313. Loading tray; 314. Third transposition arm; 315. Fourth transposition arm. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 8 As shown, the present invention provides a contact baking device for lithium batteries, including a vertical baking bin assembly 100, on which a vertical boom assembly 200 is arranged, on which a bidirectional loading tray assembly 300 is arranged, and the vertical boom assembly 200 forms a boom structure for up and down heat equalizing action in the vertical baking bin assembly 100, and during the up and down heat equalizing action, the vertical boom assembly 200 itself forms a bidirectional annular heating heat equalizing structure, and the bottom of the vertical boom assembly 200 forms a vacuum ventilation baking structure at the bottom of the vertical baking bin assembly 100, and the bidirectional loading tray assembly 300 forms a coaxial inverted transposition loading tray structure on the vertical boom assembly 200.

[0027] In a preferred embodiment, please refer to Figure 4The vertical baking bin assembly 100 includes a baking bin 101, an exhaust pipe 103 and an air bin 102 are arranged at the bottom of the baking bin 101, and a nitrogen inlet pipe 110, a support arm 111 and a vertical arm 105 are arranged at the top of the baking bin 101, a guide rail boss 104 is fixedly arranged on the support arm 111, an air valve 109 is arranged on the nitrogen inlet pipe 110, a driving motor 106 for driving a crank arm 107 to rotate is arranged on the vertical arm 105, a linkage arm 108 is rotatably arranged on the top of the crank arm 107, and closed doors are arranged on both sides of the baking bin 101 through the top push of a hinged cylinder.

[0028] In a preferred embodiment, please refer to Figure 5 and Figure 6 The vertical boom assembly 200 includes a boom 201, a piston plate 202 and an air inlet pipe 203 are arranged at the bottom of the boom 201, and a central truncated platform 206 and a ring arm 204 are arranged at the top of the boom 201, a ring platform 205 is rotatably arranged on the ring arm 204 through a bearing, a suspension rod 207 and a suspension rod seat 208 are fixedly arranged on the central truncated platform 206, an outer ring gear ring 213 is fixedly arranged on the bottom end surface of the top of the boom 201, a support shaft tube 211 is rotatably arranged on the central truncated platform 206 through a bearing, a guide shaft ring 209 and a central gear 214 are fixedly arranged on the top and bottom of the support shaft tube 211, a spiral guide rail groove 210 is opened on the outer wall of the guide shaft ring 209, and a rotatable device 210 is arranged on the bottom end surface of the ring platform 205. A plurality of edge gears 212 are arranged, and a plurality of heating rods 215 are fixedly arranged on the edge gears 212. The suspension rod 207 slides through the top of the baking chamber 101. One side of the suspension rod seat 208 is rotatably connected to the bottom of the linkage arm 108 through an axle pin. The support shaft tube 211 is rotatably sleeved on the outside of the suspension rod 207. The guide rail boss 104 is inserted into the spiral guide rail groove 210. The center gear 214, the edge gear 212 and the outer ring gear 213 are on the same horizontal plane. The two sides of the edge gear 212 are respectively meshed with the center gear 214 and the outer ring gear 213. The piston plate 202 moves up and down in the air chamber 102. One-way valves are arranged on the exhaust pipe 103, the air intake pipe 203 and the nitrogen air intake pipe 110.

[0029] In a preferred embodiment, please refer to Figure 7 and Figure 8The bidirectional loading tray assembly 300 includes a fixed base arm 301, a hydraulic cylinder 302 is fixedly arranged on the top of the fixed base arm 301, a top pushing gear arm 303 is fixedly arranged at one end of the hydraulic cylinder 302, an outer shaft arm tube 307 and an inner shaft arm rod 310 are rotatably arranged on one side of the top of the fixed base arm 301, a tray driving gear 304 and a first bevel gear 305 are fixedly arranged on one end of the inner shaft arm rod 310, a third bevel gear 309 is fixedly arranged on the outer shaft arm tube 307, a second bevel gear 306 is rotatably arranged above the top of the fixed base arm 301 through an L-shaped side arm 308, and a second transposition arm 312 and a second bevel gear 314 are rotatably arranged on the top and bottom of one side of the top of the fixed base arm 301, respectively. The fourth transposition arm 315, and the top and bottom on the other side of the top of the fixed base arm 301 are respectively rotatably provided with the first transposition arm 311 and the third transposition arm 314, a plurality of loading trays 313 are hingedly provided between the first transposition arm 311 and the second transposition arm 312 and the third transposition arm 314 and the fourth transposition arm 315, the second bevel gear 306 is respectively meshed with the first bevel gear 305 and the third bevel gear 309 on both sides, the tray driving gear 304 is meshed with the pushing gear arm 303, the inner shaft arm rod 310 rotates in the outer shaft arm tube 307, the bottom of the first transposition arm 311 is fixedly connected to the outer shaft arm tube 307, and the top of the third transposition arm 314 is fixedly connected to the inner shaft arm rod 310.

[0030] In summary, in actual use, the lithium battery raw materials are placed in the multiple loading trays 313 on the two-way loading tray assembly 300. The two-way loading tray assembly 300 of the present invention forms a coaxial reverse transposition loading tray structure on the vertical boom assembly 200. The specific working principle when in use is as follows: the hydraulic cylinder 302 drives the push gear arm 303 to move backward, and the push gear arm 303 drives the tray driving gear 304 to rotate counterclockwise. At this time, the inner shaft arm rod 310 drives the third transposition arm 31 4 rotates counterclockwise. Since a plurality of material loading trays 313 are hingedly arranged between the third transposition arm 314 and the fourth transposition arm 315, when the third transposition arm 314 swings backward, the plurality of material loading trays 313 between the third transposition arm 314 and the fourth transposition arm 315 swing backward synchronously. At this time, the plurality of material loading trays 313 between the third transposition arm 314 and the fourth transposition arm 315 are switched from a vertical arrangement to a horizontal arrangement. Through this transposition process, it is convenient to place the lithium battery raw materials on the On the plurality of material loading trays 313 between the third transposition arm 314 and the fourth transposition arm 315, when the third transposition arm 314 swings, since the second bevel gear 306 is meshed with the first bevel gear 305 and the third bevel gear 309 on both sides, when the inner shaft arm rod 310 swings backward, the outer shaft arm tube 307 swings forward, that is, a coaxial inversion structure is formed between the outer shaft arm tube 307 and the inner shaft arm rod 310, and the first transposition arm 311 and the second transposition arm 312 are connected. Multiple loading trays 313 swing forward synchronously, switching from a vertical arrangement to a horizontal arrangement. In this way, the two-way loading tray assembly 300 forms a coaxial inverted transposition loading tray structure on the vertical boom assembly 200, that is, the multiple loading trays 313 on the top of the two-way loading tray assembly 300 swing forward to form a straight line arrangement, and the multiple loading trays 313 at the bottom of the two-way loading tray assembly 300 swing backward to form a straight line arrangement. In this way, the placement of lithium battery raw materials during baking is convenient.

[0031] On the basis of the above, when the material is discharged, the airtight doors on both sides of the vertical baking bin assembly 100 are closed, and the driving motor 106 is driven at this time. The driving motor 106 drives the suspension rod 207 to reciprocate up and down on the top of the baking bin 101 through the curved arm 107 and the linkage arm 108, that is, the vertical suspension arm assembly 200 is reciprocated up and down on the vertical baking bin assembly 100. During the up and down reciprocating movement, the two-way loading tray assembly 300 on the vertical suspension arm assembly 200 also reciprocates up and down. At this time, the lithium battery raw materials on the two-way loading tray assembly 300 are baked up and down, ensuring uniform heating in the longitudinal direction. During the up and down reciprocating movement, the guide shaft ring 209 on the top of the suspension arm 201 also reciprocates up and down. At this time, the guide rail boss 104 is inserted in the spiral guide rail slide groove 210. When the guide shaft When the ring 209 moves up and down, through the cooperation of the guide rail protrusion 104 and the spiral guide rail groove 210, the support shaft tube 211 rotates on the top of the boom 201, and the center gear 214 forms a rotating structure at the bottom of the support shaft tube 211. Since the center gear 214, the edge gear 212 and the outer ring gear 213 are on the same horizontal plane, the two sides of the edge gear 212 are respectively meshed with the center gear 214 and the outer ring gear 213. When the center gear 214 rotates, through the above-mentioned meshing relationship, the multiple edge gears 212 drive the heating rod 215 to form a ring-shaped and self-rotating structure in the vertical baking chamber assembly 100. In actual use, the lithium battery raw materials are heated and baked by the heating rod 215, and the above-mentioned ring-shaped and self-rotating baking structure is cooperated to further ensure the uniformity of heating and baking of the lithium battery raw materials.

[0032] On the basis of the above, since the vertical boom assembly 200 is in an up and down reciprocating motion on the vertical baking chamber assembly 100, combined with the circular and self-rotating structure of the vertical boom assembly 200 on the vertical baking chamber assembly 100, during the up and down heat equalizing action, the vertical boom assembly 200 itself forms a bidirectional circular heating and heat equalizing structure for baking the lithium battery raw materials. Through the improvement of the above double-layer baking structure, the heat equalizing performance of the lithium battery raw materials baking is greatly improved.

[0033] On the basis of the above, when the vertical boom assembly 200 is in an up and down reciprocating motion on the vertical baking chamber assembly 100, the piston plate 202 moves up and down in the gas chamber 102. During the up and down motion, since both the inlet pipe 203 and the exhaust pipe 103 are provided with a one-way valve, an exhaust structure is formed in the gas chamber 102, so that the air in the vertical baking chamber assembly 100 is continuously discharged, so that a vacuum negative pressure environment is formed in the vertical baking chamber assembly 100, and the gasification temperature is reduced by vacuuming, and the drying is accelerated. The nitrogen inlet pipe 110 of the present invention is connected to an external nitrogen supply device during actual use. When the vacuum degree in the vertical baking chamber assembly 100 reaches the rated value, the gas valve 109 opens. To control the gas valve 109, a pressure sensing sensor can be set in the vertical baking chamber assembly 101, and then the gas valve 109 is controlled by the existing control module. At this time, external nitrogen enters the baking chamber 101, and during the piston action of the piston plate 202, the air flow and water vapor in the vertical baking chamber assembly 100 are smoothly discharged.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A contact baking device for lithium batteries, comprising a vertical baking chamber assembly (100), characterized in that: The vertical baking bin assembly (100) is provided with a vertical hanging arm assembly (200), and the vertical hanging arm assembly (200) is provided with a bidirectional material loading tray assembly (300); the vertical hanging arm assembly (200) forms a hanging arm structure for up and down heat equalization action in the vertical baking bin assembly (100); during the up and down heat equalization action, the vertical hanging arm assembly (200) itself forms a bidirectional cyclic heating heat equalization structure, and the bottom of the vertical hanging arm assembly (200) forms a vacuum ventilation baking structure at the bottom of the vertical baking bin assembly (100); the bidirectional material loading tray assembly (300) forms a coaxial reverse position-changing material loading tray structure on the vertical hanging arm assembly (200); The vertical boom assembly (200) comprises a boom (201), the bottom of the boom (201) being provided with a piston plate (202) and an air inlet pipe (203), the top of the boom (201) being provided with a central truncated platform (206) and a ring arm (204), the ring arm (204) being provided with a ring platform (205) rotatably arranged on the ring arm (204) via a bearing, a boom (207) and a boom seat (208) being fixedly arranged on the central truncated platform (206), and an outer A ring gear ring (213), a support shaft tube (211) is rotatably provided on the center truncated table (206) via a bearing, a guide shaft ring (209) and a center gear (214) are fixedly provided on the top and bottom of the support shaft tube (211), a spiral guide rail groove (210) is provided on the outer wall of the guide shaft ring (209), a plurality of edge gears (212) are rotatably provided on the bottom end surface of the ring table (205), and a plurality of heating rods (215) are fixedly provided on the edge gears (212).

2. A contact baking device for lithium batteries according to claim 1, characterized in that: The vertical baking bin assembly (100) comprises a baking bin (101), the bottom of the baking bin (101) being provided with an exhaust pipe (103) and an air bin (102), and the top of the baking bin (101) being provided with a nitrogen inlet pipe (110), a support arm (111) and a vertical arm (105), the support arm (111) being fixedly provided with a guide rail boss (104), the nitrogen inlet pipe (110) being provided with an air valve (109), the vertical arm (105) being provided with a driving motor (106) for driving a crank arm (107) to rotate, the top of the crank arm (107) being rotatably provided with a linkage arm (108), and both sides of the baking bin (101) being provided with sealed doors pushed by hinged cylinders; The bidirectional loading tray assembly (300) comprises a fixed base arm (301), a hydraulic cylinder (302) is fixedly arranged on the top of the fixed base arm (301), a push gear arm (303) is fixedly arranged on one end of the hydraulic cylinder (302), an outer shaft arm tube (307) and an inner shaft arm rod (310) are rotatably arranged on one side of the top of the fixed base arm (301), a tray driving gear (304) and a first bevel gear (305) are fixedly arranged on one end of the inner shaft arm rod (310), a third bevel gear (309) is fixedly arranged on the outer shaft arm tube (307), and the fixed base arm ( A second bevel gear (306) is rotatably arranged above the top of the fixed base arm (301) through an L-shaped side arm (308), a second transposition arm (312) and a fourth transposition arm (315) are rotatably arranged at the top and bottom of one side of the top of the fixed base arm (301), and a first transposition arm (311) and a third transposition arm (314) are rotatably arranged at the top and bottom of the other side of the top of the fixed base arm (301), and a plurality of loading trays (313) are hingedly arranged between the first transposition arm (311) and the second transposition arm (312) and the third transposition arm (314) and the fourth transposition arm (315).

3. A contact baking device for lithium batteries according to claim 2, characterized in that: The suspension rod (207) slides through the top of the baking bin (101), and one side of the suspension rod seat (208) is rotatably connected to the bottom of the linkage arm (108) via an axle pin.

4. A contact baking device for lithium batteries according to claim 2, characterized in that: The support shaft tube (211) is rotatably sleeved on the outside of the suspension rod (207), and the guide rail protrusion (104) is inserted into the spiral guide rail sliding groove (210).

5. The contact baking device for lithium batteries according to claim 1, characterized in that: The central gear (214), the edge gear (212) and the outer ring gear (213) are located on the same horizontal plane, and two sides of the edge gear (212) are respectively meshed with the central gear (214) and the outer ring gear (213).

6. A contact baking device for lithium batteries according to claim 2, characterized in that: The piston plate (202) moves up and down in the gas chamber (102), and one-way valves are provided on the exhaust pipe (103), the intake pipe (203) and the nitrogen intake pipe (110).

7. A contact baking device for lithium batteries according to claim 2, characterized in that: The second bevel gear (306) is meshed with the first bevel gear (305) and the third bevel gear (309) on both sides respectively, the tray driving gear (304) is meshed with the push gear arm (303), and the inner shaft arm rod (310) rotates in the outer shaft arm tube (307).

8. A contact baking device for lithium batteries according to claim 2, characterized in that: The bottom of the first transposition arm (311) is fixedly connected to the outer shaft arm tube (307), and the top of the third transposition arm (314) is fixedly connected to the inner shaft arm rod (310).

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