Ultrasonic-enhanced vacuum cake soaking method and equipment for lithium-manganese button cell

Abstract

The invention discloses an ultrasonic-enhanced vacuum cake soaking method and equipment for a lithium-manganese button cell. The equipment comprises a liquid tank, a lifting cover, a turnover disc, a turnover disc conveying mechanism and a cake clamping assembly, the upper end of the liquid box is open, and an ultrasonic transducer is arranged on the box wall; the lifting cover comprises a cover body and a supporting plate, and a vacuum extraction opening is formed in the cover body; the turnover disc comprises a disc bottom and a first pair of side walls, and the disc bottom is provided with a plurality of strip-shaped cake grooves extending along the first pair of side walls; the first pair of side walls form gaps at two ends of the strip-shaped cake groove; when the lifting cover ascends and descends, the cover body seals the liquid tank and the supporting plate is located in the liquid tank; the turnover disc conveying mechanism transversely pushes the turnover disc to enable the turnover disc to enter or leave the supporting plate when the lifting cover is in an ascending state; the clamping end of the cake clamping assembly penetrates through the notch to clamp the positive electrode cake in the strip-shaped cake groove, automatic online electrolyte infiltration of the positive electrode cake of the button cell is achieved, manual intervention is reduced, the continuity and efficiency of operation are improved, and therefore the production efficiency and the cleanliness of the positive electrode cake can be greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of battery processing, and in particular to electrolyte infiltration equipment and an infiltration method for button-type battery positive electrode cakes. Background Art

[0002] In the production and application of button batteries, the content of electrolyte is a key technical requirement. Button batteries are usually composed of positive electrodes, negative electrodes, separators and electrolytes. The electrolyte, as a transmission medium for lithium ions, provides some active lithium ions as conductive ions on the one hand, and provides ion channels on the other hand to help lithium ions move freely in it, thereby realizing the charging and discharging functions of the battery.

[0003] In battery processing, the participation of electrolyte includes multiple steps, including the addition of electrolyte to positive electrode powder, saturated absorption of electrolyte after positive electrode cake forming (commonly known as bubble cake), and the addition of electrolyte during battery forming. The addition of electrolyte to positive electrode powder and the addition of electrolyte during battery forming can both be added by rated metering, but the saturated absorption of electrolyte after positive electrode cake forming will vary depending on the actual situation of the positive electrode.

[0004] Assuming that the electrolyte is not fully absorbed after the positive electrode cake is formed, the system may be unbalanced, resulting in poor ion channels, thus affecting the battery's charge and discharge efficiency and cycle stability.

[0005] Since it takes a certain amount of time for the cathode cake to absorb electrolyte saturation, in traditional technology, the cathode cake is usually placed in a container with saturated electrolyte. After a period of time, the cathode cake is taken out of the container and transferred to the equipment. This leads to poor continuity of the production process, and the cathode cake is easily contaminated when transferred between different equipment or even different workshops. Summary of the invention

[0006] In view of the problems in the prior art, the technical problem to be solved by the present invention is to provide an automated lithium-manganese button battery ultrasonic enhanced vacuum cake making equipment and method, which reduces manual intervention, improves the continuity and efficiency of operations, and thus can greatly improve production efficiency and the cleanliness of positive electrode cakes.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: an ultrasonic enhanced vacuum cake blistering device for lithium manganese button batteries, comprising a liquid tank, a lifting cover, a turntable, a turntable conveying mechanism and a cake clamping assembly; the upper end of the liquid tank is open and a sound channel mounting hole and a liquid inlet are provided on the box wall, and an ultrasonic transducer is provided in the sound channel mounting hole; the lifting cover comprises a cover body and a support plate connected to the bottom of the cover body through a connecting column, and a vacuum exhaust port is provided on the cover body; the turntable comprises a plate bottom and a first pair of side walls, and the plate bottom is provided with a plurality of strip cake grooves extending along the first pair of sides; the first pair of side walls form notches at both ends of the strip cake grooves; when the lifting cover is lifted, the cover body closes the liquid tank and the support plate is located in the liquid tank; the turntable conveying mechanism pushes the turntable laterally when the lifting cover is in the ascending state so that the turntable enters or leaves the support plate; the clamping end of the cake clamping assembly passes through the notch to clamp the positive electrode cake in the strip cake groove.

[0008] The preferred technical solution adopted by the present invention to solve the above technical problems is: the bottom of the plate includes a plurality of continuously wavy and inclined strip walls, adjacent strip walls form strip grooves or strip ridges on the upper surface of the bottom of the plate, and a plurality of first through holes are transversely arranged on the strip walls.

[0009] The preferred technical solution adopted by the present invention to solve the above technical problems is: an annular groove is provided at the opening edge of the liquid tank, a first sealing ring is provided in the annular groove, the cover body matches the annular groove, and a second sealing ring is provided at the lower edge of the cover body for tight sealing with the first sealing ring.

[0010] The preferred technical solution adopted by the present invention to solve the above technical problems is: the turnover plate includes a second pair of side walls, the upper edges of the second pair of side walls are provided with upwardly protruding tool clamping parts, and the turnover plate conveying mechanism moves the turnover plate through the tool clamping parts.

[0011] The preferred technical solution adopted by the present invention to solve the above technical problem is: a damping component is provided at the bottom of the liquid tank, and the support plate slows down and descends after touching the damping component.

[0012] The preferred technical solution adopted by the present invention to solve the above technical problems is: the lifting cover is driven by a cylinder to lift up and down, the side wall of the cover body is provided with a guide member, and one end of the guide member is slidably arranged in a longitudinal guide slot of a longitudinal guide frame.

[0013] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is: a button-type battery positive electrode cake turnover plate, including a plate bottom and a first pair of side walls, the plate bottom is provided with a plurality of strip-shaped cake grooves extending along the first pair of sides; the first pair of side walls form notches at both ends of the strip-shaped cake grooves, and the edges of the notches form retaining walls to prevent the positive electrode cakes in the strip-shaped cake grooves from laterally escaping from the strip-shaped cake grooves.

[0014] The preferred technical solution adopted by the present invention to solve the above technical problems is: the bottom of the plate includes a plurality of continuous wavy curved strip walls, adjacent strip walls form strip grooves or strip ridges on the upper surface of the bottom of the plate, and a plurality of first through holes are transversely arranged on the strip walls.

[0015] The preferred technical solution adopted by the present invention to solve the above technical problem is: comprising a second pair of side walls, the upper edges of the second pair of side walls are provided with upwardly protruding tool clamping parts, and the second pair of side walls are transversely provided with a plurality of second through holes.

[0016] The preferred technical solution adopted by the present invention to solve the above technical problems is: a method for ultrasonically strengthening vacuum foaming of lithium manganese button batteries, which is carried out on the lithium manganese button battery ultrasonically strengthening vacuum foaming equipment, comprising the following steps:

[0017] Step A: the lifting cover rises, the support plate is higher than the upper end surface of the liquid tank, and the turntable conveying mechanism pushes the turntable containing the positive electrode cake onto the support plate;

[0018] Step B: the lifting cover descends, and the cover body closes the liquid tank;

[0019] Step C: injecting liquid and making the liquid level lower than the lower surface of the cover body, forming an air chamber above the liquid tank, and immersing the turntable in the electrolyte in the liquid tank;

[0020] Step D: evacuating the liquid tank to a rated vacuum degree through the vacuum pumping port;

[0021] Step E: intermittently or continuously applying ultrasonic waves through the ultrasonic transducer to accelerate the escape of bubbles in the positive electrode cake;

[0022] Step F: turning off the vacuum pumping and breaking the vacuum in the liquid tank, and continuing to apply ultrasonic waves intermittently or continuously through the ultrasonic transducer;

[0023] Step G: the lifting cover rises, the support plate is higher than the upper end surface of the liquid tank, and the turntable conveying mechanism pushes the turntable containing the positive electrode cake away from the support plate to the clamping station;

[0024] Step H: The clamping end of the clamping assembly passes through the notch to clamp the positive electrode cake in the strip cake groove.

[0025] Compared with the prior art, the advantages of the present invention are: through the coordinated work of the lifting cover, the rotating disk conveying mechanism and the clamping assembly, the online infiltration of the electrolyte of the button battery positive electrode cake is realized, which reduces manual intervention, improves the consistency and efficiency of the operation, and can greatly improve the production efficiency and the cleanliness of the positive electrode cake. This is of great significance for improving the performance and stability of the battery.

[0026] Ultrasonic waves are applied intermittently or continuously through an ultrasonic transducer to accelerate the escape of bubbles in the positive electrode cake. The action of ultrasonic waves causes a slight vibration on the turnover plate and the positive electrode cake placed on the support plate. This slight vibration not only promotes the further escape of residual bubbles in the cake, but also enhances the penetration capacity of the electrolyte, thereby significantly improving the liquid absorption efficiency of the positive electrode cake. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0028] Figure 1 This is a schematic diagram of the ultrasonic enhanced vacuum bubble cake equipment for lithium manganese button batteries;

[0029] Figure 2 This is a partial schematic diagram of the ultrasonic enhanced vacuum bubble cake equipment for lithium manganese button batteries;

[0030] Figure 3 This is a schematic diagram of the opening of the lifting cover of the ultrasonic enhanced vacuum bubble cake equipment for lithium manganese button batteries;

[0031] Figure 4 A schematic diagram of the closing of the lifting cover of the ultrasonic enhanced vacuum bubble cake equipment for lithium manganese button batteries;

[0032] Figure 5 This is a partial exploded schematic diagram of the ultrasonic enhanced vacuum bubble cake equipment for lithium manganese button batteries;

[0033] Figure 6 Schematic diagram of the button battery positive electrode cake turnover plate suitable for online cake soaking equipment Figure 1 ;

[0034] Figure 7 Schematic diagram of the button battery positive electrode cake turnover plate suitable for online cake soaking equipment Figure 2 ;

[0035] Figure 8 Schematic diagram of the button battery positive electrode cake turnover plate suitable for online cake soaking equipment Figure 3 . DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0038] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0039] like Figure 6-8 As shown, this embodiment provides a button-type battery positive electrode cake turnover plate 1, including a plate bottom 11 and a first pair of side walls 12, the plate bottom 11 is provided with a plurality of strip cake grooves s extending along the first pair of sides. The positive electrode cakes are stacked and placed horizontally in the strip cake grooves s. The first pair of side walls 12 form notches a at both ends of the strip cake grooves s, the first pair of side walls 12 include a plurality of petal-shaped walls z, and the edges of the notches a form retaining walls c to prevent the positive electrode cakes in the strip cake grooves s from lateral separation from the strip cake grooves s.

[0040] like Figure 1 As shown, this embodiment also provides a lithium manganese button battery ultrasonic enhanced vacuum cake blistering device using the above-mentioned turnover disk 1, which includes a liquid tank 2, a lifting cover 3, a turnover disk conveying mechanism 4 and a cake clamping assembly 5 in addition to the turnover disk 1.

[0041] like Figure 2 As shown, the upper end of the liquid tank 2 is open and the tank wall is provided with a sound channel installation hole d, a liquid inlet e, a liquid outlet f and a liquid level sensor y. The electrolyte can be injected or removed from the tank through the liquid inlet e and the liquid outlet f. An ultrasonic transducer is provided in the sound channel installation hole d. Ultrasonic waves can be intermittently or continuously applied to the tank through the ultrasonic transducer.

[0042] like Figure 1-2As shown in the figure, the lifting cover 3 includes a cover body 31 and a support plate 32 connected to the bottom of the cover body 31 through a connecting column 33, and a vacuum exhaust port q is provided on the cover body 31. When the lifting cover 3 is lifted, the cover body 31 closes the liquid tank 2 and the support plate 32 is located in the liquid tank 2. When the lifting cover 3 is in the ascending state, the turntable conveying mechanism 4 pushes the turntable 1 laterally so that the turntable 1 enters or leaves the support plate 32. The clamping end of the biscuit clamping assembly 5 passes through the notch a to clamp the positive electrode biscuit in the strip biscuit groove s. The turntable conveying mechanism 4 is not limited, and a push rod or a slider mechanism can be used. The biscuit clamping assembly 5 can use a clamping tool similar to that in patent CN116119329A.

[0043] The lithium manganese button battery ultrasonic enhanced vacuum cake soaking equipment can realize the online infiltration of the button battery positive electrode cake electrolyte. The specific method includes the following steps:

[0044] Step A: Figure 3 As shown, the lifting cover 3 rises, the support plate 32 is higher than the upper end surface of the liquid tank 2, and the turntable conveying mechanism 4 pushes the turntable 1 containing the positive electrode cakes onto the support plate 32.

[0045] Step B: Figure 4 As shown, the lifting cover 3 is lowered, and the cover body 31 closes the liquid tank 2.

[0046] Step C: Liquid is injected and the liquid level is lower than the lower surface of the cover 31, an air chamber is formed above the liquid tank 2, and the turntable 1 is immersed in the electrolyte in the liquid tank 2. The existence of the air chamber leaves a certain amount of space for gas to overflow, but this space cannot be too large, otherwise it will increase the time for subsequent vacuuming, resulting in reduced efficiency.

[0047] Step D: Evacuate the liquid tank 2 to the rated vacuum degree through the vacuum pumping port. This step allows the gas in the positive electrode gap to partially escape, thereby improving the liquid absorption capacity of the positive electrode cake.

[0048] Step E: Ultrasonic waves are intermittently or continuously applied through an ultrasonic transducer to accelerate the escape of bubbles in the positive electrode cake. The action of ultrasonic waves causes a slight vibration on the turnover disk 1 and the positive electrode cake placed on the support plate 32. This slight vibration not only promotes the further escape of residual bubbles in the cake, but also enhances the penetration capacity of the electrolyte, thereby significantly improving the liquid absorption efficiency of the positive electrode cake.

[0049] Step F: turn off the vacuum pumping, break the vacuum in the liquid tank 2, and continue to apply ultrasonic waves intermittently or continuously through the ultrasonic transducer. After breaking the vacuum, the repeated operation of ultrasonic waves can make the gas in the positive electrode gap escape locally, further improving the liquid absorption capacity of the positive electrode cake. The vacuum pumping and ultrasonic action complement each other and jointly improve the liquid absorption efficiency.

[0050] Step G: The lifting cover 3 rises, the support plate 32 is higher than the upper end surface of the liquid tank 2, and the turntable conveying mechanism 4 pushes the turntable 1 containing the positive electrode cake away from the support plate 32 to the clamping station.

[0051] Step H: The clamping end of the clamping assembly 5 passes through the notch a to clamp the positive electrode cake in the strip cake groove s.

[0052] The turntable conveying mechanism 4 can push the turntable 1 horizontally when the lifting cover 3 is in the ascending state, so that the turntable 1 can easily enter or leave the support plate 32, and the clamping end of the clamping assembly 5 can pass through the notch a to clamp the positive electrode cake in the strip cake groove s, so that the positive electrode cake can be quickly clamped and transferred to the next process after infiltration. Through the coordinated work of the lifting cover 3, the turntable conveying mechanism 4 and the clamping assembly 5, the button battery positive electrode cake electrolyte is infiltrated online, reducing manual intervention, improving the continuity and efficiency of the operation, and thus greatly improving the production efficiency and the cleanliness of the positive electrode cake. This is of great significance for improving the performance and stability of the battery.

[0053] Preferably, if Figure 6-8 As shown, the bottom 11 of the turntable 1 includes a plurality of continuous wavy curved strip walls 10, and the strip walls 10 are inclined so that their cross-section is wavy. Adjacent strip walls 10 form strip grooves s or strip ridges t on the upper surface of the bottom 11, and correspondingly form strip protrusions or strip grooves on the lower surface. The strip walls 10 are transversely provided with a plurality of first through holes m for electrolyte and bubbles to flow through.

[0054] The inclined strip wall 10 supports the positive electrode cake, and the electrolyte can enter the bottom of the plate 11 through the strip groove, and penetrate from the bottom and side wall of the positive electrode cake through these through holes, further improving the liquid absorption capacity of the positive electrode cake. This all-round infiltration method ensures that the positive electrode cake can fully absorb the electrolyte, thereby improving the performance of the battery. In the process of electrolyte infiltration of the positive electrode cake, bubbles may be generated inside the positive electrode cake. The design of the inclined strip wall 10 and the first through hole m provides an escape channel for these bubbles. The design of the inclined strip wall 10 also makes the cross-section of the strip cake groove s V-shaped, and the inclined wall design also makes the positive electrode cake always in the midline position when sliding down the wall, and the positive electrode cake is not easy to be offset, which helps to prevent the positive electrode cake from being displaced or deformed during the infiltration process, thereby further ensuring the stability and reliability of the infiltration effect.

[0055] As shown in the figure, in addition to the bottom 11 and the first pair of side walls 12 for carrying the positive electrode cakes, the design of the turntable 1 also includes a second pair of side walls 13. The upper edge of this pair of side walls is specially designed with a tool clamping portion h that protrudes upward. The main purpose of this design is to provide a special clamping point for the turntable conveying mechanism 4 to avoid direct contact with the positive electrode cakes when moving the turntable 1. Designing the tool clamping portion h on the second pair of side walls 13 that are in a different direction from the strip cake groove s and protruding from the upper edge of the second pair of side walls 13 can effectively prevent physical damage such as friction and extrusion that may occur during clamping or movement, thereby ensuring the integrity and quality of the positive electrode cakes.

[0056] As shown in the figure, the opening edge of the liquid tank 2 of the lithium manganese button battery ultrasonic enhanced vacuum bubble cake device is designed with an annular groove, and a first sealing ring 6 is arranged in the groove. At the same time, the cover body 31 matches the annular groove, and the lower edge of the cover body 31 is equipped with a second sealing ring 7 matching the first sealing ring 6 to achieve a tight sealing effect.

[0057] As shown in the figure, a damping assembly 8 is provided at the bottom of the liquid tank 2, and the support plate 32 slows down and descends after touching the damping assembly 8. The introduction of the damping assembly 8 effectively reduces the impact force when the support plate 32 descends, avoiding problems such as equipment damage or electrolyte splashing caused by impact. The smooth descent of the support plate 32 helps to ensure uniform infiltration of the electrolyte on the positive electrode cake, thereby improving the performance and consistency of the battery.

[0058] like Figure 3-4 As shown, the lifting cover 3 of the lithium manganese button battery ultrasonic strengthening vacuum bubble cake device is driven by a cylinder to achieve up and down lifting, and at the same time, a guide member k is provided on the side wall of the cover body 31, and one end of the guide member k is slidably arranged in a longitudinal guide slot of a longitudinal guide frame 9. The cooperation between the guide member k and the longitudinal guide slot ensures the stability of the lifting cover 3 during the lifting process, and avoids problems such as electrolyte leakage or equipment damage caused by shaking or deviation.

[0059] The above is an introduction to the ultrasonic enhanced vacuum bubble cake method and equipment for lithium manganese button batteries provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. Ultrasonic enhanced vacuum bubble cake equipment for lithium manganese button batteries, characterized by It includes a liquid tank, a lifting cover, a turntable, a turntable conveying mechanism and a cake clamping assembly; the upper end of the liquid tank is open and a sound channel mounting hole and a liquid inlet are provided on the box wall, and an ultrasonic transducer is provided in the sound channel mounting hole; the lifting cover includes a cover body and a support plate connected to the bottom of the cover body through a connecting column, and a vacuum exhaust port is provided on the cover body; the turntable includes a plate bottom and a first pair of side walls, and the plate bottom is provided with a plurality of strip cake grooves extending along the first pair of sides; the first pair of side walls form notches at both ends of the strip cake grooves; when the lifting cover is lifted, the cover body closes the liquid tank and the support plate is located in the liquid tank; the turntable conveying mechanism pushes the turntable laterally when the lifting cover is in the rising state so that the turntable enters or leaves the support plate; the clamping end of the cake clamping assembly passes through the notch to clamp the positive electrode cake in the strip cake groove.

2. The ultrasonic enhanced vacuum bubble cake device for lithium manganese button batteries according to claim 1 is characterized in that The disk bottom comprises a plurality of continuously wave-shaped and inclined strip walls, adjacent strip walls form strip grooves or strip convex ridges on the upper surface of the disk bottom, and a plurality of first through holes are transversely arranged on the strip walls.

3. The ultrasonic enhanced vacuum bubble cake device for lithium manganese button batteries according to claim 1 is characterized in that An annular groove is provided at the opening edge of the liquid box, a first sealing ring is provided in the annular groove, the cover body matches the annular groove, and a second sealing ring for pressing and sealing with the first sealing ring is provided at the lower edge of the cover body.

4. The ultrasonic enhanced vacuum bubble cake device for lithium manganese button batteries according to claim 1, characterized in that The turnover plate comprises a second pair of side walls, and the upper edges of the second pair of side walls are provided with upwardly protruding tool clamping parts, and the turnover plate conveying mechanism moves the turnover plate through the tool clamping parts.

5. The ultrasonic enhanced vacuum bubble cake device for lithium manganese button batteries according to claim 1, characterized in that A damping assembly is provided at the bottom of the liquid tank, and the support plate slows down and descends after touching the damping assembly.

6. The ultrasonic enhanced vacuum bubble cake device for lithium manganese button batteries according to claim 1, characterized in that The lifting cover is driven by a cylinder to lift up and down. A guide piece is arranged on the side wall of the cover body. One end of the guide piece is slidably arranged in a longitudinal guide slot of a longitudinal guide frame.

7. Ultrasonic enhanced vacuum bubble cake equipment for lithium manganese button batteries, characterized by It includes a turnover plate, which includes a plate bottom and a first pair of side walls. The plate bottom is provided with a plurality of strip-shaped cake grooves extending along the first pair of sides. The first pair of side walls form notches at both ends of the strip-shaped cake grooves, and the edges of the notches form retaining walls to prevent the positive electrode cakes in the strip-shaped cake grooves from laterally escaping from the strip-shaped cake grooves.

8. The ultrasonic enhanced vacuum bubble cake device for lithium manganese button batteries according to claim 7, characterized in that The disk bottom comprises a plurality of continuous wave-shaped curved strip walls, adjacent strip walls form strip-shaped cake grooves or strip-shaped ridges on the upper surface of the disk bottom, and a plurality of first through holes are transversely arranged on the strip walls.

9. The ultrasonic enhanced vacuum bubble cake device for lithium manganese button batteries according to claim 7, characterized in that It comprises a second pair of side walls, the upper edges of the second pair of side walls are provided with tooling clamping parts protruding upwards, and the second pair of side walls are transversely provided with a plurality of second through holes.

10. Ultrasonic enhanced vacuum foaming method for lithium manganese button batteries, characterized in that The method is carried out on the lithium manganese button battery ultrasonic strengthening vacuum bubble cake device according to any one of claims 1 to 6, comprising the following steps: Step A: the lifting cover rises, the support plate is higher than the upper end surface of the liquid tank, and the turntable conveying mechanism pushes the turntable with the positive electrode cake onto the support plate; Step B: the lifting cover descends, and the cover body closes the liquid tank; Step C: injecting liquid and making the liquid level lower than the lower surface of the cover body, forming an air chamber above the liquid tank, and immersing the turntable in the electrolyte in the liquid tank; Step D: evacuating the liquid tank to a rated vacuum degree through the vacuum pumping port; Step E: intermittently or continuously applying ultrasonic waves through the ultrasonic transducer to accelerate the escape of bubbles in the positive electrode cake; Step F: turning off the vacuum pumping and breaking the vacuum in the liquid tank, and continuing to apply ultrasonic waves intermittently or continuously through the ultrasonic transducer; Step G: the lifting cover rises, the support plate is higher than the upper end surface of the liquid tank, and the turntable conveying mechanism pushes the turntable containing the positive electrode cake away from the support plate to the clamping station; Step H: The clamping end of the clamping assembly passes through the notch to clamp the positive electrode cake in the strip cake groove.

Images