Differential pressure impregnation method

Abstract

The invention relates to the technical field of capacitor production, and particularly discloses a differential pressure impregnation method, which comprises the following steps: S1, positioning: conveying a charging tray clamped with a capacitor sleeve cup assembly in place through a conveying mechanism, driving a vacuum sleeve to press down through a lifting assembly to cover the charging tray in a sealing manner, and locking and positioning the charging tray through a locking assembly; s2, vacuumizing: vacuumizing the interior of the vacuum sleeve through preset vacuum time, and keeping a vacuum state for a period of time when a set vacuum degree is reached, so that the capacitor sleeve cup assembly is subjected to vacuum impregnation; and S3, vacuum relief: performing vacuum relief on the vacuum sleeve to a normal-pressure state, and continuously performing first-time normal-pressure impregnation on the capacitor sleeve cup assembly according to preset normal-pressure time. According to the invention, through multiple times of differential pressure circulation alternation, the infiltration process of the electrolyte can be promoted from different angles, and it is ensured that the electrolyte fully and uniformly infiltrates each part of the capacitor.

Description

Technical Field

[0001] The invention relates to the technical field of capacitor production, and in particular to a differential pressure impregnation method. Background Art

[0002] Supercapacitor, also known as electrochemical capacitor, is an energy storage device with the characteristics of high power density, long life, and fast charging and discharging. During production, electrolyte injection is an important process in supercapacitor production.

[0003] After the capacitor is filled with liquid, it needs to be left to stand so that the electrolyte can fully penetrate into the capacitor. Currently, vacuum or normal pressure methods are often used. In the normal pressure method, the electrolyte is mainly absorbed into the capacitor by gravity. Since there is no external force to assist, the absorption is slow and gaps and bubbles are prone to appear. The vacuum method promotes the penetration of the electrolyte to a certain extent, but due to the single pressure, the electrolyte is not easy to fully penetrate into the various fine parts of the capacitor, and the uniformity needs to be improved. Therefore, those skilled in the art provide a differential pressure impregnation method to solve the problems raised in the above background technology. Summary of the invention

[0004] The object of the present invention is to provide a differential pressure impregnation method to solve the above technical problems.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A differential pressure impregnation method, comprising:

[0007] S1. Positioning: The material tray with the capacitor sleeve cup assembly is transported to the position through the conveying mechanism, the vacuum sleeve is driven down by the lifting assembly to press the sealing cover above the material tray, and the material tray is locked and positioned through the locking assembly;

[0008] S2, vacuuming: vacuuming the vacuum sleeve for a preset vacuum time, and maintaining the vacuum state for a period of time when the set vacuum degree is reached, so that the capacitor sleeve cup assembly is vacuum impregnated;

[0009] S3, venting the vacuum: venting the vacuum sleeve to a normal pressure state, and continuously performing the first normal pressure impregnation on the capacitor sleeve cup assembly according to a preset normal pressure time;

[0010] S4, applying positive pressure: after reaching the normal pressure time, applying positive pressure to the vacuum jacket until the preset pressure is met, and performing positive pressure impregnation according to the preset time;

[0011] S5, decompression: after reaching the positive pressure time, the vacuum jacket is decompressed to normal pressure state, and a second normal pressure impregnation is performed according to the set time;

[0012] S6, cyclic dipping: cyclically immersing steps S2 to S5 for multiple times, the number of times being set according to actual production requirements;

[0013] S7, discharging: after the cyclic impregnation is completed, the locking assembly is unlocked, the lifting assembly drives the vacuum sleeve to reset, and the material tray is transported out by the conveying mechanism to complete the differential pressure impregnation;

[0014] Furthermore, the lifting assembly is fixed above the conveying mechanism through a frame, the vacuum sleeve comprises a sleeve body, the inner diameter of the sleeve body is not greater than the outer diameter of the material tray, a vacuum valve and a positive pressure valve are fixed at the middle of the upper end surface of the sleeve body, and a sealing ring is fixedly embedded at the lower end of the sleeve body;

[0015] Furthermore, the lifting assembly includes a lifting seat and two lifting cylinders whose upper ends are fixedly connected to the frame, and the extended ends of the two lifting cylinders are fixedly connected to the two sides of the sleeve respectively;

[0016] The lifting seat is fixed on the upper end surface of the sleeve body, and guide rods are slidably sleeved at the four corners, and the upper and lower ends of the guide rods are fixed to the frame;

[0017] Further, the locking assembly has four parts, which are respectively arranged around the sleeve body, and the locking assembly includes two locking seats and a mounting plate fixed to the lifting seat, and both sides of the mounting plate are rotatably sleeved with locking rods, and the two locking seats are respectively fixed on both sides of the outer end of the material tray, and the lower end of the locking rod can be plugged into the locking seat;

[0018] Further, an air motor is fixed at the middle of the upper end surface of the mounting plate, a driving pulley is fixed at the output end of the air motor, a driven pulley is fixed at the upper ends of the two locking rods, a synchronous belt is connected between the driving pulley and the two driven pulleys, and a tensioning wheel is rotatably connected at both sides of the upper end surface of the air motor close to the driving pulley, and the tensioning wheel presses the outer side of the synchronous belt so that the wrap angle between the synchronous belt and the driving pulley is less than 120°;

[0019] Furthermore, buffer rods are fixedly sleeved at the four corners of the lower end surface of the lifting seat, and the buffer rods can contact the installation platform between the guide rod and the frame after being lowered;

[0020] Furthermore, the vacuum valve and the positive pressure valve are both pneumatic valves;

[0021] Furthermore, a pressure sensor is provided on one side of the sleeve, and the pressure sensor is used to monitor the air pressure inside the sleeve;

[0022] Beneficial effects of the present invention:

[0023] Through multiple alternating cycles of vacuum, normal pressure, positive pressure, and normal pressure differential pressure, the electrolyte infiltration process can be promoted from different angles, which can more effectively promote the electrolyte to flow in different directions, and ensure that the electrolyte fully and evenly infiltrates all parts of the capacitor, thereby improving the quality and performance consistency of the capacitor, and improving the product qualification rate and reliability;

[0024] By setting up the lifting assembly and multiple locking assemblies, the vacuum sleeve and the material tray have good sealing performance, which can ensure the overall sealing effect when performing differential pressure circulation, and is not prone to leakage, thereby ensuring the effect of differential pressure circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 is a schematic structural diagram of a differential pressure impregnation device in an embodiment of a differential pressure impregnation method of the present invention;

[0027] Figure 2 It is a structural diagram of the vacuum sleeve after pressing in the present invention;

[0028] Figure 3 is a top perspective view of the vacuum sleeve of the present invention;

[0029] Figure 4 is a bottom-up stereogram of the vacuum sleeve of the present invention;

[0030] Figure 5 is a structural diagram of the locking assembly in the present invention;

[0031] Figure 6 yes Figure 2 Enlarged view of point A in the middle.

[0032] Reference numerals:

[0033] 1. Conveying mechanism; 2. Material tray; 3. Capacitor sleeve cup assembly; 4. Frame; 5. Lifting assembly; 51. Lifting cylinder; 52. Lifting seat; 53. Guide rod; 54. Buffer rod; 6. Vacuum sleeve; 61. Sleeve body; 62. Vacuum valve; 63. Positive pressure valve; 64. Pressure sensor; 65. Sealing ring; 7. Locking assembly; 71. Mounting plate; 72. Pneumatic motor; 73. Driving pulley; 74. Driven pulley; 75. Tensioning pulley; 76. Synchronous belt; 77. Locking rod; 78. Locking seat. DETAILED DESCRIPTION

[0034] 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.

[0035] Please refer to the attached Figures 1 to 6 As shown, a differential pressure impregnation method in an embodiment of the present invention is operated by a differential pressure impregnation device, which includes a conveying mechanism 1 and a lifting assembly 5. The lifting assembly 5 is fixed above the conveying mechanism 1 through a frame 4. The vacuum sleeve 6 includes a sleeve body 61. The inner diameter of the sleeve body 61 is not greater than the outer diameter of the material tray 2, so that after the sleeve body 61 is covered on the material tray 2, there will be no gap with the edge of the material tray 2 to ensure sealing. A vacuum valve 62 and a positive pressure valve 63 are fixed at the middle of the upper end surface of the sleeve body 61. The vacuum valve 6 2 and positive pressure valve 63 are respectively connected to the external vacuum pump and positive pressure pump (not shown) to evacuate the interior of the sleeve 61 and apply positive pressure, wherein the vacuum valve 62 and the positive pressure valve 63 are pneumatic valves, which are convenient for automatic control. A pressure sensor 64 is provided on one side of the sleeve 61, and the pressure sensor 64 is used to monitor the internal air pressure of the sleeve 61. A sealing ring 65 is fixedly embedded at the lower end of the sleeve 61, and the sealing ring 65 is provided so that the lower end of the sleeve 61 can maintain a good seal with the material tray 2.

[0036] The conveying mechanism 1 adopts the existing technical structure, which will not be described in detail here.

[0037] The lifting assembly 5 includes a lifting seat 52 and two lifting cylinders 51 whose upper ends are fixedly connected to the frame 4. The protruding ends of the two lifting cylinders 51 are respectively fixedly connected to the two sides of the sleeve 61, and the sleeve 61 is driven to move up and down by the extension and retraction of the lifting cylinders 51; the lifting seat 52 is fixed to the upper end surface of the sleeve 61, and guide rods 53 are slidably sleeved at the four corners, and the upper and lower ends of the guide rods 53 are fixed to the frame 4. The arrangement of the guide rods 53 can improve the stability of the vacuum sleeve 6 when it is lifted; buffer rods 54 are fixedly sleeved at the four corners of the lower end surface of the lifting seat 52. After the buffer rods 54 are lowered, they can contact the mounting platform between the guide rods 53 and the frame 4. The buffer rods 54 are spring-damped buffer rods, which are used to play a buffering role when the vacuum sleeve 6 is lowered to prevent mechanical collision.

[0038] The locking assembly 7 has four parts, which are respectively arranged around the sleeve body 61. The locking assembly 7 includes two locking seats 78 and a mounting plate 71 fixed to the lifting seat 52. Both sides of the mounting plate 71 are rotatably sleeved with locking rods 77. The two locking seats 78 are respectively fixed on both sides of the outer end of the material tray 2, and the lower end of the locking rod 77 can be plugged into the locking seat 78; an air motor 72 is fixed at the middle of the upper end surface of the mounting plate 71, and a driving pulley 73 is fixed at the output end of the air motor 72. A driven pulley 74 is fixed at the upper ends of the two locking rods 77, and a synchronous belt 7 is connected between the driving pulley 73 and the two driven pulleys 74. 6. The upper end surface of the pneumatic motor 72 is rotatably connected to both sides of the driving pulley 73. The tensioning wheel 75 presses the outer side of the synchronous belt 76, so that the wrap angle between the synchronous belt 76 and the driving pulley 73 is less than 120°. When the locking assembly 7 is in use, the pneumatic motor 72 drives the driving pulley 73 to rotate, thereby driving the two locking rods 77 to rotate. Since the locking assembly 7 rises and falls together with the vacuum sleeve 6, during the process of plugging and separating with the locking seat 78, the rotation of the locking rod 77 can reduce friction, speed up the separation and plugging speed, and help the locking rod 77 to be smoothly separated and plugged with the locking seat 78.

[0039] The operation method of the differential pressure impregnation device in this embodiment is as follows:

[0040] S1. Positioning: The material tray 2 with the capacitor sleeve cup assembly 3 is conveyed to the position through the conveying mechanism 1, and the vacuum sleeve 6 is driven to press down through the lifting assembly 5 to set the sealing cover above the material tray 2. The lifting cylinder 51 of the lifting assembly 5 extends to make the vacuum sleeve 6 descend and press tightly with the material tray 2, and the material tray 2 is locked and positioned through the locking assembly 7. The locking assembly 7 moves synchronously with the vacuum sleeve 6. When the vacuum sleeve 6 is lowered, the pneumatic motor 72 is started to drive the locking rod 77 to rotate, and the rotating locking rod 77 is inserted into the locking seat 78, so that the material tray 2 and the vacuum sleeve 6 are locked, and the sealing effect is further improved.

[0041] S2, evacuation: evacuate the vacuum sleeve 6 for a preset vacuum time, open the vacuum valve 62, start the vacuum pump connected to the vacuum valve 62, evacuate the interior of the sleeve 61, detect the internal pressure of the sleeve 61 by the pressure sensor 64, and maintain the vacuum state for a period of time when the set vacuum degree is reached, so that the capacitor sleeve cup assembly 3 is vacuum impregnated. In the vacuum environment, the residual air inside the capacitor can be discharged, the bubbles can be eliminated, and the capillary phenomenon can be enhanced, so that the electrolyte can be fully absorbed by the capacitor.

[0042] S3, vacuum release: the vacuum sleeve 6 is vacuumed to the normal pressure state, and the capacitor sleeve cup assembly 3 is continuously impregnated at the normal pressure for the first time according to the preset normal pressure time. Under the normal pressure environment, the electrolyte can continue to adjust and stabilize the penetration state under the new pressure environment, further consolidate the penetration effect during vacuum impregnation, and improve the uniformity of the electrolyte. Among them, the vacuum release method is realized by using the vacuum release valve in the prior art, and the vacuum release valve is installed on the vacuum extraction pipeline of the vacuum valve 62.

[0043] S4, applying positive pressure: after reaching the normal pressure time, applying positive pressure to the vacuum jacket 6. When applying positive pressure, open the positive pressure valve 63 and start the positive pressure pump connected thereto until the preset pressure is met. Positive pressure impregnation is performed according to the preset time. Under the positive pressure environment, a certain external pressure can be applied to the capacitor, further promoting the electrolyte to penetrate deeper into the fine structure and pores inside the capacitor, reducing the voids and removing residual gas.

[0044] S5, decompression: after reaching the positive pressure time, the vacuum jacket 6 is decompressed to the normal pressure state, and a second normal pressure impregnation is performed according to the set time, and then the normal pressure state is returned again. The purpose is the same as that of step S3, wherein the decompression is achieved by a pressure reducing valve in the prior art, and the pressure reducing valve is installed on the pressure pipeline of the positive pressure valve 63.

[0045] S6, cyclic impregnation: Steps S2 to S5 are repeated multiple times, and the number of times is set according to actual production requirements. By alternating between vacuum, normal pressure, positive pressure, and normal pressure differential pressure cycles, the electrolyte infiltration process can be promoted from different angles, ensuring that the electrolyte fully and evenly infiltrates all parts of the capacitor, thereby improving the quality and performance consistency of the capacitor.

[0046] S7, discharging: After the cyclic impregnation is completed, the locking assembly 7 is unlocked, the lifting assembly 5 drives the vacuum sleeve 6 to reset, and the material tray 2 is transported out by the conveying mechanism 1 to complete the differential pressure impregnation.

[0047] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A differential pressure impregnation method, characterized in that: include: S1. Positioning: The material tray (2) with the capacitor sleeve cup assembly (3) is transported to the right position by the conveying mechanism (1), the vacuum sleeve (6) is driven by the lifting assembly (5) to press down the sealing cover above the material tray (2), and the material tray (2) is locked and positioned by the locking assembly (7). S2, vacuuming: vacuuming the inside of the vacuum sleeve (6) for a preset vacuum time, and maintaining the vacuum state for a period of time when a preset vacuum degree is reached, so as to perform vacuum impregnation on the capacitor sleeve cup assembly (3); S3, venting the vacuum: venting the vacuum sleeve (6) to a normal pressure state, and continuously performing a first normal pressure impregnation on the capacitor sleeve cup assembly (3) according to a preset normal pressure time; S4, applying positive pressure: after reaching normal pressure time, applying positive pressure to the vacuum jacket (6) until a preset pressure is met, and performing positive pressure impregnation according to a preset time; S5, decompression: after reaching the positive pressure time, the vacuum jacket (6) is decompressed to a normal pressure state, and a second normal pressure impregnation is performed according to a set time; S6, cyclic dipping: cyclically immersing steps S2 to S5 for multiple times, the number of times being set according to actual production requirements; S7, discharging: after the cyclic impregnation is completed, the locking assembly (7) is unlocked, the lifting assembly (5) drives the vacuum sleeve (6) to reset, and the material tray (2) is transported out by the conveying mechanism (1), completing the differential pressure impregnation.

2. A differential pressure impregnation method according to claim 1, characterized in that: The lifting assembly (5) is fixed above the conveying mechanism (1) through a frame (4); the vacuum sleeve (6) comprises a sleeve body (61); the inner diameter of the sleeve body (61) is not greater than the outer diameter of the material tray (2); a vacuum valve (62) and a positive pressure valve (63) are fixed at the middle of the upper end surface of the sleeve body (61); and a sealing ring (65) is fixedly embedded at the lower end of the sleeve body (61).

3. A differential pressure impregnation method according to claim 2, characterized in that: The lifting assembly (5) comprises a lifting seat (52) and two lifting cylinders (51) whose upper ends are fixedly connected to the frame (4), and the protruding ends of the two lifting cylinders (51) are respectively fixedly connected to two sides of the sleeve (61); The lifting seat (52) is fixed on the upper end surface of the sleeve body (61), and guide rods (53) are slidably sleeved at the four corners. The upper and lower ends of the guide rods (53) are fixed to the frame (4).

4. A differential pressure impregnation method according to claim 3, characterized in that: The locking components (7) have four parts, which are respectively arranged around the sleeve (61). The locking components (7) include two locking seats (78) and a mounting plate (71) fixed to the lifting seat (52). Both sides of the mounting plate (71) are rotatably sleeved with locking rods (77). The two locking seats (78) are respectively fixed on both sides of the outer end of the material tray (2), and the lower end of the locking rod (77) can be plugged into the locking seat (78).

5. A differential pressure impregnation method according to claim 4, characterized in that: A pneumatic motor (72) is fixed at the middle of the upper end surface of the mounting plate (71), a driving pulley (73) is fixed at the output end of the pneumatic motor (72), a driven pulley (74) is fixed at the upper ends of the two locking rods (77), a synchronous belt (76) is connected between the driving pulley (73) and the two driven pulleys (74), and a tensioning wheel (75) is rotatably connected to both sides of the upper end surface of the pneumatic motor (72) close to the driving pulley (73), and the tensioning wheel (75) presses the outer side of the synchronous belt (76) so that the wrap angle between the synchronous belt (76) and the driving pulley (73) is less than 120°.

6. A differential pressure impregnation method according to claim 4, characterized in that: Buffer rods (54) are fixedly sleeved at the four corners of the lower end surface of the lifting seat (52), and the buffer rods (54) can contact the installation platform between the guide rod (53) and the frame (4) after being lowered.

7. A differential pressure impregnation method according to claim 2, characterized in that: The vacuum valve (62) and the positive pressure valve (63) are both pneumatic valves.

8. A differential pressure impregnation method according to claim 2, characterized in that: A pressure sensor (64) is provided on one side of the sleeve (61), and the pressure sensor (64) is used to monitor the internal air pressure of the sleeve (61).

Images