Automatic baking device and process for soft package lithium battery

Abstract

The invention relates to a soft package lithium battery automatic baking device and a process thereof.The soft package lithium battery automatic baking device comprises a barrel, a pentagonal rotating shaft is arranged in the middle of the barrel, a plurality of frames are distributed in the barrel in the circumferential direction, clamping plates are arranged in the frames in a sliding mode, and a moving assembly for driving the clamping plates to move left and right is arranged in the middle of the barrel; a first swing assembly for driving the frame to swing left and right is arranged at one end of the barrel, an air inlet assembly is arranged in the rotating shaft, guide assemblies are arranged on the two sides of the frame, and a second swing assembly for driving the guide assemblies to swing left and right is arranged on the same side of the first swing assembly. The guide assembly is used for directionally conveying hot air when the guide assembly swings back and forth along with the frame; by directionally conveying hot air to the soft package battery in multiple directions, the soft package battery can be dried more uniformly and comprehensively, the drying time of the soft package battery can be shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery production, and in particular to an automatic baking device for soft-pack lithium batteries and a process thereof. Background Art

[0002] Lithium battery, also known as lithium-ion battery, is a secondary battery that relies on the movement of lithium ions between the positive and negative electrodes to achieve charging and discharging purposes. Compared with other major secondary batteries, lithium-ion has obvious advantages such as high energy density, high discharge power, long cycle life, no memory effect and green environmental protection.

[0003] A Chinese invention with application publication number CN116140162B discloses an electrode baking and drying device for lithium battery production, including a base and a shell, etc. The base is fixed with the shell, and also includes a drying mechanism and a separation mechanism, etc.; the shell is connected to a drying mechanism for drying the wet slurry coated on the electrode sheets and a separation mechanism for separating the electrode sheets.

[0004] However, the inventors found that during actual use, the device uses fan blades to supply air for drying, the wind direction is single, and the area of ​​the battery poles exposed to the wind is uneven, which affects the drying effect. Based on this, we proposed an automatic baking device for soft-pack lithium batteries and its process. Summary of the Invention

[0005] The purpose of the present invention is to address the shortcomings of the prior art. A rotating shaft is provided in the cylinder, and several frames are distributed in the circumferential direction of the cylinder. A splint is slidably provided in the frame. A moving component is provided in the middle of the cylinder to drive the splint to move left and right. The splint moves left and right on the frame, and the batteries on the frame will not be blocked by the splint, thereby affecting their drying effect; a first swinging component is provided at one end of the cylinder to drive the frame to swing left and right, an air inlet component is provided inside the rotating shaft, and guide components are provided on both sides of the frame, and a second swinging component is provided on the same side of the first swinging component to drive the guide component to swing left and right. When the frame swings back and forth left and right, the soft-pack batteries are baked with hot air through the air inlet component, and the guide component is used to directionally deliver hot air when following the reciprocating swing of the frame. The present invention can dry the soft-pack batteries more evenly and comprehensively by directionally delivering hot air to the soft-pack batteries in multiple directions, and can also reduce the drying time and improve production efficiency.

[0006] In view of the above technical problems, the technical solutions adopted by the present invention are as follows:

[0007] A device for automatically baking soft-pack lithium batteries comprises a cylinder, a pentagonal rotating shaft is provided in the middle of the cylinder, a plurality of frames are distributed in the circumferential direction of the cylinder, a splint is slidingly provided in the frame, a moving component for driving the splint to move left and right is provided in the middle of the cylinder, the frame is rotatably provided at both ends of the cylinder, a first swinging component for driving the frame to swing left and right is provided at one end of the cylinder, an air inlet component is provided inside the rotating shaft, guide components are provided on both sides of the frame, a second swinging component for driving the guide component to swing left and right is provided on the same side of the first swinging component, when the frame swings back and forth, the soft-pack battery is baked with hot air through the air inlet component, and the guide component is used to deliver hot air in a direction as the frame swings back and forth.

[0008] As a preference, the moving assembly includes a first slide groove arranged in the frame, a column arranged on the splint and a track arranged in the middle of the cylinder, the column is slidably arranged in the track, and the track includes a first parallel section, a second parallel section and a transition section connecting the two.

[0009] Preferably, the first swing assembly includes a first fixed rod arranged at the end of the frame, a first gear arranged on the first fixed rod, inner and outer rings a arranged on both sides of the first gear, and outer teeth a and inner teeth a respectively arranged on the inner and outer rings a and meshing with the first gear.

[0010] As a preference, the air inlet assembly includes an air inlet pipe and a plurality of trapezoidal grooves arranged on the rotating shaft.

[0011] As a preference, the guide assembly includes two blowing plates which are rotatably arranged inside the cylinder and distributed on both sides of the frame, and the air inlet cross-sections of the blowing plates are larger than the air outlet cross-sections.

[0012] As a preference, the second swinging assembly includes a second fixed rod respectively arranged at the end of the blowing plate, a second gear arranged on the second fixed rod, an inner and outer ring b arranged on both sides of the second gear, and an outer tooth b and an inner tooth b respectively arranged on the inner and outer rings b and meshing with the second gear.

[0013] As a preference, a cover assembly is provided at one end of the cylinder, and the cover assembly includes a second slide groove provided at one end of the cylinder, a turntable rotatably provided in the second slide groove, a plurality of bayonet holes provided on the second slide groove, a fixed block provided on the turntable and abutting against the frame, and a cylinder cover plate provided at one end of the cylinder.

[0014] As a preference, a drive assembly is provided at the other end of the cylinder, and the drive assembly includes a drive motor arranged outside the cylinder, pulleys respectively arranged on the rotating shaft and the output shaft of the drive motor, and a belt arranged on the pulley.

[0015] As another preferred embodiment, a bracket is provided at one end of the rotating shaft, and the bracket is used to drive the frame and the blowing plate to rotate synchronously.

[0016] In addition, the present invention also provides a production process of a soft-pack lithium battery automatic baking device, comprising the following steps:

[0017] a. Loading process: manually place the soft-pack battery cells into the frame one by one, place the turntable into the second chute from the bayonet, and then cover the cylinder cover;

[0018] b. Preheating process: heat the cylinder, directly preheat the soft-pack battery cell at a baking temperature of 85-105°C and normal cylinder pressure, and heat the inside of the battery cell to within ±5°C of the baking temperature within a certain period of time;

[0019] c. Preliminary baking process: after preheating, bake the soft-pack battery cell. When the cylinder body is evacuated to the required pressure within nPa, stop evacuating the cylinder body and bake it under the vacuum state;

[0020] d. During the double baking process, hot air is delivered into the cylinder through the air inlet pipe and the trapezoidal groove. The drive motor drives the rotating shaft to rotate, which in turn drives the frame and the blowing plate to rotate synchronously through the bracket. Driven by the first and second swing assemblies, the frame swings left and right, while the blowing plate follows the swing of the frame to deliver air in a directional manner. When the columns on the clamping plate slide within the track, the clamping plate moves left and right on the frame.

[0021] e. Unloading process: manually open the cylinder cover, rotate the turntable to remove it from the latch, and then manually or robotically remove the baked soft-pack battery cells.

[0022] Beneficial effects of the present invention:

[0023] In the present invention, a clamping plate is provided on the frame. When the upright post on the clamping plate slides on the track, the clamping plate is driven to move left and right on the frame. The clamping plate will not block the soft-pack battery cells on the frame, thereby affecting the drying effect.

[0024] In the present invention, the frame is driven by the first swinging component to swing left and right while rotating. At the same time, the blowing plates arranged on both sides of the frame follow the swing of the frame under the drive of the second swinging component to directional air supply to the frame. The wind in the rotating shaft is divided into two parts. The wind direction in the middle is normal to perform hot air drying on the soft-pack batteries. The wind on both sides is directed by the blowing plates and accelerates the drying of the soft-pack batteries. The device can dry the batteries more evenly and comprehensively, and can also reduce the drying time and improve production efficiency.

[0025] In summary, the equipment has the advantages of short baking time, more uniform and comprehensive baking, etc., and is particularly suitable for the field of lithium battery production technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 The figure is an axonometric structural diagram of an automatic baking device for soft-pack lithium batteries and its process;

[0028] Figure 2 A schematic diagram of the internal structure of an automatic baking device for soft-pack lithium batteries and its process;

[0029] Figure 3 The left side structural diagram of a soft-pack lithium battery automatic baking device and its process;

[0030] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A;

[0031] Figure 5 for Figure 3 The enlarged structural diagram of part B in the middle;

[0032] Figure 6 Schematic diagram of the internal structure of the cylinder.

[0033] Figure 7 Schematic diagram of the track structure;

[0034] Figure 8 Schematic diagram of the structure of the cover assembly;

[0035] Figure 9 It is a structural diagram of the drive component;

[0036] Figure 10 This is a working state diagram of an automatic baking device for soft-pack lithium batteries and its process;

[0037] Figure 11 The following is a process flow chart of an automatic baking device for soft-pack lithium batteries and its process;

[0038] In the figure: 1- cylinder; 2- rotating shaft; 3- frame; 4- clamping plate; 5- moving assembly; 6- first swing assembly; 7- air inlet assembly; 8- guide assembly; 9- second swing assembly; 10- cover assembly; 11- driving assembly; 12- bracket; 51- first chute; 52- column; 53- track; 61- first fixing rod; 62- first gear; 63- inner and outer ring a; 64- outer gear a; 65- inner gear a; 71- inlet Air duct; 72-trapezoidal groove; 81-blowing plate; 91-second fixed rod; 92-second gear; 93-inner and outer rings b; 94-outer teeth b; 95-inner teeth b; 101-second slide; 102-turntable; 103-bayonet; 104-fixed block; 105-cylinder cover; 111-drive motor; 112-pulley; 113-belt; 531-first parallel section; 532-second parallel section; 533-transition section. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings.

[0040] Example 1

[0041] like Figures 1 to 11 As shown, an automatic baking device for soft-pack lithium batteries includes a cylinder 1, a pentagonal rotating shaft 2 is provided in the middle of the cylinder 1, a plurality of frames 3 are distributed in the circumferential direction inside the cylinder 1, a splint 4 is slidingly provided in the frame 3, a moving component 5 for driving the splint 4 to move left and right is provided in the middle of the cylinder 1, the frame 3 is rotatably provided at both ends of the cylinder 1, a first swinging component 6 for driving the frame 3 to swing left and right is provided at one end of the cylinder 1, an air inlet component 7 is provided inside the rotating shaft 2, guide components 8 are provided on both sides of the frame 3, and a second swinging component 9 for driving the guide component 8 to swing left and right is provided on the same side of the first swinging component 6. When the frame 3 swings back and forth left and right, the soft-pack battery is baked with hot air through the air inlet component 7, and the guide component 8 is used to deliver hot air in a direction when following the reciprocating swing of the frame 3.

[0042] like Figures 6 and 7 As shown, the moving component 5 includes a first slide groove 51 arranged in the frame 3, a column 52 arranged on the splint 4 and a track 53 arranged in the middle of the cylinder 1, the column 52 is slidably arranged in the track 53, and the track 53 includes a first parallel section 531, a second parallel section 532 and a transition section 533 connecting the two.

[0043] It is worth mentioning here that by arranging a splint on the frame, when the column on the splint slides on the track, it drives the splint to move left and right on the frame, and the splint will not block the soft-pack battery cells on the frame, thereby affecting the drying effect.

[0044] like Figures 3 and 4 As shown, the first swing assembly 6 includes a first fixed rod 61 arranged at the end of the frame 3, a first gear 62 arranged on the first fixed rod 61, inner and outer rings a63 arranged on both sides of the first gear 62, and outer teeth a64 and inner teeth a65 respectively arranged on the inner and outer rings a63 and meshing with the first gear 62.

[0045] In this embodiment, when the frame 3 makes a circular motion around the rotating shaft 2, the first gear 62 engages with the outer teeth a64 and the inner teeth a65 respectively, driving the first gear 62 to rotate left and right, thereby driving the frame 3 to swing left and right.

[0046] like Figure 6 As shown, the air inlet assembly 7 includes an air inlet pipe 71 and a plurality of trapezoidal grooves 72 arranged on the rotating shaft 2.

[0047] It is worth mentioning here that when the hot air passes through the air inlet pipe 71 and is dispersed through the trapezoidal groove 72, the air inlet cross-section of the trapezoidal groove 72 is smaller than the air outlet cross-section, so that when the hot air enters the cylinder 1, the hot air is dispersed into the cylinder 1 in a state of acceleration and pressure.

[0048] like Figure 3 As shown, the guide assembly 8 includes two blowing plates 81 rotatably disposed inside the cylinder 1 and distributed on both sides of the frame 3 , and the air inlet cross-section of the blowing plates 81 is larger than the air outlet cross-section.

[0049] In this embodiment, the hot air in the blowing plate 81 is accelerated and pressurized to dry the soft-pack battery cells in the frame 3 .

[0050] like Figure 3 and Figure 6 As shown, the second swing assembly 9 includes a second fixed rod 91 respectively arranged at the end of the blowing plate 81, a second gear 92 arranged on the second fixed rod 91, an inner and outer rings b93 arranged on both sides of the second gear 92, and an outer tooth b94 and an inner tooth b95 respectively arranged on the inner and outer rings b93 and meshing with the second gear 92.

[0051] In this embodiment, the working principle of the second swing assembly 9 is consistent with that of the first swing assembly 6 described above.

[0052] like Figure 6 and Figure 8As shown, a cover assembly 10 is provided at one end of the cylinder 1, and the cover assembly 10 includes a second slide groove 101 provided at one end of the cylinder 1, a turntable 102 rotatably provided in the second slide groove 101, a plurality of bayonet holes 103 provided on the second slide groove 101, a fixed block 104 provided on the turntable 102 and abutting against the frame 3, and a cylinder cover plate 105 provided at one end of the cylinder 1, and a bracket 12 is provided at one end of the rotating shaft 2, and the bracket 12 is used to drive the frame 3 and the blowing plate 81 to rotate synchronously.

[0053] It is worth mentioning that the turntable 102 is rotatably disposed in the second sliding groove 101 , and together with the bracket 12 at the other end, drives the frame 3 and the blowing plate 81 to rotate along the rotating shaft 2 as the center.

[0054] like Figure 9 As shown, a drive assembly 11 is provided at the other end of the cylinder 1, and the drive assembly 11 includes a drive motor 111 arranged on the outside of the cylinder 1, a pulley 112 respectively arranged on the rotating shaft 2 and the output shaft of the drive motor 111, and a belt 113 arranged on the pulley 112.

[0055] Example 2

[0056] A production process of an automatic baking device for soft-pack lithium batteries, using an automatic baking device for soft-pack lithium batteries, includes the following steps:

[0057] a loading process, manually place the soft-pack battery cells into the frame 3 one by one, place the turntable 102 in the second chute 101 from the bayonet 103, and then cover the cylinder cover 105;

[0058] b. Preheating process: heat the cylinder 1, directly preheat the soft-pack battery cell at a baking temperature of 85-105°C and normal pressure of the cylinder 1, and heat the inside of the battery cell to within ±5°C of the baking temperature within a certain period of time;

[0059] c. Preliminary baking process: after the preheating is completed, the soft-pack battery cell is baked, and the cylinder 1 is evacuated to the required pressure within n Pa, and the vacuum is stopped and the baking is maintained in the vacuum state;

[0060] d. During the double baking process, hot air is delivered into the cylinder 1 through the air inlet pipe 71 and the trapezoidal slot 72. The drive motor 111 drives the rotating shaft 2 to rotate, which in turn drives the frame 3 and the blowing plate 81 to rotate synchronously through the bracket 12. Driven by the first swing assembly 6 and the second swing assembly 9, the frame 3 is driven to swing left and right, while the blowing plate 81 is driven to follow the swing of the frame 3 to deliver air in a directional manner. When the upright post 52 on the splint 4 slides within the track 53, the splint 4 is driven to move left and right on the frame 3.

[0061] e. Unloading process: manually open the cylinder cover 105, rotate the turntable 102 to remove the turntable 102 from the latch 103, and then manually or robotically remove the baked soft-pack battery cells.

[0062] The working process is as follows:

[0063] Manually place the soft-pack batteries into the frame 3 one by one, place the turntable 102 into the second chute 101 through the latch 103, and then cover it with the cylinder cover 105;

[0064] Hot air is delivered into the cylinder 1 through the air inlet pipe 71 and the trapezoidal groove 72. The driving motor 111 drives the rotating shaft 2 to rotate, and drives the frame 3 and the blowing plate 81 to rotate synchronously through the bracket 12. Driven by the first swing assembly 6 and the second swing assembly 9, the frame 3 is driven to swing left and right, and the blowing plate 81 is driven to follow the swing of the frame 3 to deliver air in a directional manner. When the column 52 on the clamping plate 4 slides in the track 53, the clamping plate 4 is driven to move left and right on the frame 3.

[0065] The cylinder cover 105 is opened manually, the turntable 102 is rotated to remove the turntable 102 from the latch 103, and then the baked soft-pack battery cell is taken out manually or by a robot.

[0066] Of course, in this technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0067] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art based on the technical guidance of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A soft-pack lithium battery automatic baking device, comprising a cylinder (1), characterized in that: A pentagonal rotating shaft (2) is provided in the middle of the cylinder (1), a plurality of frames (3) are distributed in the circumferential direction in the cylinder (1), a clamping plate (4) is slidably provided in the frame (3), a moving assembly (5) for driving the clamping plate (4) to move left and right is provided in the middle of the cylinder (1), the frame (3) is rotatably provided at both ends of the cylinder (1), one end of the cylinder (1) is provided with a first swinging assembly (6) for driving the frame (3) to swing left and right, an air inlet assembly (7) is provided inside the rotating shaft (2), guide assemblies (8) are provided on both sides of the frame (3), a second swinging assembly (9) for driving the guide assembly (8) to swing left and right is provided on the same side of the first swinging assembly (6), when the frame (3) swings back and forth, the soft-pack battery is baked with hot air through the air inlet assembly (7), and the guide assembly (8) is used to deliver hot air in a direction when following the reciprocating swing of the frame (3).

2. The automatic baking device for soft-pack lithium batteries according to claim 1, characterized in that: The moving assembly (5) comprises a first sliding groove (51) arranged in the frame (3), a column (52) arranged on the clamping plate (4), and a track (53) arranged in the middle of the cylinder (1); the column (52) is slidably arranged in the track (53); and the track (53) comprises a first parallel section (531), a second parallel section (532), and a transition section (533) connecting the first and second parallel sections.

3. The automatic baking device for soft-pack lithium batteries according to claim 1, characterized in that: The first swing assembly (6) comprises a first fixed rod (61) arranged at the end of the frame (3), a first gear (62) arranged on the first fixed rod (61), inner and outer rings a (63) arranged on both sides of the first gear (62), and outer teeth a (64) and inner teeth a (65) respectively arranged on the inner and outer rings a (63) and meshing with the first gear (62).

4. The automatic baking device for soft-pack lithium batteries according to claim 1, characterized in that: The air inlet assembly (7) comprises an air inlet pipe (71) and a plurality of trapezoidal grooves (72) arranged on the rotating shaft (2).

5. The automatic baking device for soft-pack lithium batteries according to claim 1, characterized in that: The guide assembly (8) comprises two blowing plates (81) which are rotatably arranged inside the cylinder (1) and distributed on both sides of the frame (3); the air inlet cross-section of the blowing plates (81) is larger than the air outlet cross-section.

6. The automatic baking device for soft-pack lithium batteries according to claim 1, characterized in that: The second swing assembly (9) comprises a second fixed rod (91) respectively arranged at the end of the blowing plate (81), a second gear (92) arranged on the second fixed rod (91), inner and outer rings b (93) arranged on both sides of the second gear (92), and outer teeth b (94) and inner teeth b (95) respectively arranged on the inner and outer rings b (93) and meshing with the second gear (92).

7. The automatic baking device for soft-pack lithium batteries according to claim 1, characterized in that: A cover plate assembly (10) is provided at one end of the cylinder (1), and the cover plate assembly (10) comprises a second chute (101) provided at one end of the cylinder (1), a turntable (102) rotatably provided in the second chute (101), a plurality of bayonet holes (103) provided on the second chute (101), a fixing block (104) provided on the turntable (102) and abutting against the frame (3), and a cylinder cover plate (105) provided at one end of the cylinder (1).

8. The automatic baking device for soft-pack lithium batteries according to claim 2, characterized in that: A drive assembly (11) is provided at the other end of the cylinder (1), and the drive assembly (111) comprises a drive motor (111) arranged outside the cylinder (1), a pulley (112) respectively arranged on the rotating shaft (2) and the output shaft of the drive motor (111), and a belt (113) arranged on the pulley (112).

9. The automatic baking device for soft-pack lithium batteries according to claim 1, characterized in that: A bracket (12) is provided at one end of the rotating shaft (2), and the bracket (12) is used to drive the frame (3) and the blowing plate (81) to rotate synchronously.

10. A production process using the automatic baking device for soft-pack lithium batteries according to any one of claims 1 to 9, comprising the following steps: a. Loading process: manually place the soft-pack battery cells into the frame (3) in sequence, place the turntable (102) into the second chute (101) from the bayonet (103), and then cover the cylinder cover (105); b. Preheating process, heating the cylinder (1), preheating the soft-pack battery directly under the baking temperature (85 ~ 105) ℃, the cylinder (1) atmospheric pressure conditions, and heating the battery inside to the baking temperature within ± 5 ℃ within a certain period of time; c. Preliminary baking step: after the preheating is completed, the soft-pack battery cell is baked, and the cylinder (1) is evacuated to the required pressure within nPa, and the evacuation is stopped, and the baking is carried out while maintaining the vacuum state; d. In the re-baking process, hot air is delivered to the cylinder (1) through the air inlet pipe (71) and the trapezoidal groove (72), the driving motor (111) drives the rotating shaft (2) to rotate, and drives the frame (3) and the blowing plate (81) to rotate synchronously through the bracket (12). Driven by the first swing assembly (6) and the second swing assembly (9), the frame (3) is driven to swing left and right, and the blowing plate (81) is driven to follow the swing of the frame (3) to deliver air in a directional manner. When the column (52) on the splint (4) slides in the track (53), the splint (4) is driven to move left and right on the frame (3); e. Unloading process: manually open the cylinder cover (105), rotate the turntable (102) to remove the turntable (102) from the bayonet (103), and then manually or mechanically remove the baked soft-pack battery cell.

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