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

Abstract

The utility model discloses ultrasonic-enhanced vacuum cake-soaking equipment for a lithium-manganese button cell. The ultrasonic-enhanced vacuum cake-soaking 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 utility model relates to the technical field of battery processing, in particular to an ultrasonic enhanced vacuum cake blistering device for lithium-manganese button batteries. Background Art

[0002] The electrolyte content is a key technical requirement in the production and application of button batteries. Button batteries typically consist of a positive electrode, a negative electrode, a separator, and an electrolyte. The electrolyte acts as a transport medium for lithium ions, providing some active lithium ions that function as conductive ions and providing ion channels for the free movement of lithium ions, thus enabling the battery's charge and discharge functions.

[0003] During battery processing, the electrolyte is added in multiple steps, including adding the electrolyte to the cathode powder, saturated electrolyte absorption after cathode cake formation (commonly known as blistering), and adding the electrolyte during battery formation. Both the addition of electrolyte to the cathode powder and the addition of electrolyte during battery formation can be done using a nominal metering method, but the saturated electrolyte absorption after cathode cake formation varies depending on the actual conditions of the cathode.

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

[0005] Because it takes time for the cathode cakes to become saturated with electrolyte, conventional techniques typically involve placing the cathode cakes in a container saturated with electrolyte. After a period of time, the cathode cakes are removed from the container and transferred to the equipment. This results in poor production process continuity, and the cathode cakes are easily contaminated when transferred between different equipment or even different workshops. Utility Model Content

[0006] In view of the problems in the existing technology, the technical problem to be solved by the present invention is to provide an automated lithium-manganese button battery ultrasonic enhanced vacuum cake soaking 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-mentioned technical problems is: an ultrasonic enhanced vacuum cake bubbling device for lithium-manganese button batteries, comprising a liquid tank, a lifting cover, a turnover plate and a turnover plate 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 by a connecting column, and the cover body is provided with a vacuum exhaust port; the turnover plate 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 turnover plate conveying mechanism pushes the turnover plate laterally when the lifting cover is raised so that the turnover plate 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 plate bottom, and a plurality of first through holes are horizontally provided 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 tightly 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 problems 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 move up and down, and the side wall of the cover body is provided with a guide member, one end of which is slidably provided 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, comprising a plate bottom and a first pair of side walls, wherein 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 multiple continuous wavy curved strip walls, adjacent strip walls form strip grooves or strip ridges on the upper surface of the plate bottom, and multiple first through holes are horizontally provided on the strip walls.

[0015] The preferred technical solution adopted by the present invention to solve the above technical problems is: comprising a second pair of side walls, wherein 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 laterally provided with a plurality of second through holes.

[0016] Compared with existing technologies, the advantages of this utility model are: through the coordinated operation of the lifting cover, the rotating disk conveying mechanism, and the cake clamping assembly, it achieves online electrolyte infiltration of the button battery positive electrode cake, reduces manual intervention, improves the consistency and efficiency of the operation, and thus significantly improves production efficiency and the cleanliness of the positive electrode cake. This is of great significance for improving battery performance and stability.

[0017] 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

[0018] The present invention will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings are merely schematic representations of the composition or structure of the depicted objects and may contain exaggerated representations. Furthermore, the drawings are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the ultrasonic strengthening vacuum bubble cake equipment for lithium-manganese button batteries;

[0020] Figure 2 This is a partial schematic diagram of the ultrasonic strengthening vacuum bubble cake equipment for lithium-manganese button batteries;

[0021] Figure 3Schematic diagram of the opening of the lifting cover of the ultrasonic enhanced vacuum bubble cake equipment for lithium-manganese button batteries;

[0022] Figure 4 This is a schematic diagram of the closing of the lifting cover of the ultrasonic strengthening vacuum bubble cake equipment for lithium manganese button batteries;

[0023] Figure 5 This is a partial exploded diagram of the ultrasonic strengthening vacuum bubble cake equipment for lithium-manganese button batteries;

[0024] Figure 6 Schematic diagram of button battery positive electrode cake turnover plate suitable for online cake soaking equipment Figure 1 ;

[0025] Figure 7 Schematic diagram of button battery positive electrode cake turnover plate suitable for online cake soaking equipment Figure 2 ;

[0026] Figure 8 Schematic diagram of the button battery positive electrode cake turnover plate suitable for online cake soaking equipment Figure 3 . DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the present invention is usually placed when in use. 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. Therefore, they should not be understood as limitations on the present invention.

[0029] It should be noted that like reference numerals denote like 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.

[0030] like Figure 6-8 As shown, this embodiment provides a button-type battery positive electrode cake turnover tray 1, comprising a tray base 11 and a first pair of sidewalls 12. The tray base 11 is provided with a plurality of strip-shaped cake slots s extending along the first pair of sides. The positive electrode cakes are stacked and placed horizontally within the strip-shaped cake slots s. The first pair of sidewalls 12 form notches a at both ends of the strip-shaped cake slots s. The first pair of sidewalls 12 include multiple petal-shaped walls z, and the edges of the notches a form retaining walls c that prevent the positive electrode cakes within the strip-shaped cake slots s from laterally escaping.

[0031] 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, in addition to the turnover disk 1, a liquid tank 2, a lifting cover 3, a turnover disk conveying mechanism 4 and a cake clamping assembly 5.

[0032] like Figure 2 As shown, the top of the liquid tank 2 is open, and the tank wall is provided with an acoustic channel mounting hole d, a liquid inlet e, a liquid outlet f, and a liquid level sensor y. The electrolyte can be injected or withdrawn from the tank through the liquid inlet e and outlet f. An ultrasonic transducer is located within the acoustic channel mounting hole d. This ultrasonic transducer can intermittently or continuously apply ultrasonic waves to the tank.

[0033] like Figure 1-2 As shown in FIG. , the lifting cover 3 includes a cover body 31 and a support plate 32 connected to the bottom of the cover body 31 by a connecting column 33. The cover body 31 is provided with a vacuum exhaust port q. When the lifting cover 3 is raised or lowered, the cover body 31 closes the liquid tank 2 and the support plate 32 is located inside the liquid tank 2. When the lifting cover 3 is in the raised 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 restricted and can adopt a push rod or slider mechanism. The biscuit clamping assembly 5 can adopt a clamping tool similar to that in patent CN116119329A.

[0034] This lithium-manganese button battery ultrasonic enhanced vacuum cake soaking equipment can achieve online electrolyte infiltration of the button battery positive electrode cake. The specific method includes the following steps:

[0035] Step A: If 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 turnover plate conveying mechanism 4 pushes the turnover plate 1 containing the positive electrode cake onto the support plate 32.

[0036] Step B: If Figure 4 As shown, the lifting cover 3 is lowered and the cover body 31 closes the liquid tank 2.

[0037] 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 turnover plate 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 should not be too large, otherwise it will increase the time for subsequent vacuuming and reduce efficiency.

[0038] Step D: Evacuate the liquid tank 2 to the rated vacuum degree through the vacuum port. This step allows the gas originally in the positive electrode gap to escape partially, thereby improving the positive electrode cake's ability to absorb liquid.

[0039] Step E: 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 the 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 permeability of the electrolyte, thereby significantly improving the liquid absorption efficiency of the positive electrode cake.

[0040] Step F: Turn off the vacuum pump, break the vacuum in liquid tank 2, and continue applying ultrasonic waves intermittently or continuously via the ultrasonic transducer. This repeated vacuum breaking and ultrasonic application allows the gas previously trapped in the positive electrode voids to escape locally, further improving the positive electrode cake's ability to absorb liquid. The vacuum pumping and ultrasonication processes complement each other, collectively enhancing liquid absorption efficiency.

[0041] 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 turnover plate conveying mechanism 4 pushes the turnover plate 1 containing the positive electrode cake away from the support plate 32 to the clamping station.

[0042] Step H: The clamping end of the clamping assembly 5 passes through the notch a to clamp the positive electrode cake in the strip-shaped cake groove s.

[0043] When the lifting cover 3 is raised, the revolving tray conveyor mechanism 4 can push the revolving tray 1 laterally, allowing it to easily enter or exit the support plate 32. The clamping end of the biscuit clamping assembly 5 can pass through the notch a to clamp the positive electrode cake in the strip-shaped cake slot s, allowing the positive electrode cake to be quickly clamped and transferred to the next process after impregnation. The coordinated operation of the lifting cover 3, the revolving tray conveyor mechanism 4, and the biscuit clamping assembly 5 enables online electrolyte impregnation of the button cell positive electrode cake, reducing manual intervention and improving operational consistency and efficiency, thereby significantly increasing production efficiency and the cleanliness of the positive electrode cake. This is of great significance for improving battery performance and stability.

[0044] Preferably, if Figure 6-8 As shown, the bottom 11 of the turnover disk 1 comprises a plurality of continuously undulating, curved strip walls 10. The strip walls 10 are inclined, resulting in a wavy cross-section. Adjacent strip walls 10 form strip grooves s or strip ridges t on the top surface of the disk bottom 11, while corresponding strip protrusions or strip grooves are formed on the bottom surface. Multiple first through-holes m are transversely defined on the strip walls 10, through which electrolyte and bubbles flow.

[0045] 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 easily offset, which helps to prevent the positive electrode cake from displacement or deformation during the infiltration process, thereby further ensuring the stability and reliability of the infiltration effect.

[0046] As shown in the figure, the design of the turntable 1 includes, in addition to the bottom 11 and the first pair of side walls 12 for carrying the positive electrode cakes, a second pair of side walls 13 is also added. 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 dedicated clamping point for the turntable conveying mechanism 4 to avoid direct contact with the positive electrode cakes when the turntable 1 is moved. Designing the tool clamping portion h on the second pair of side walls 13 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.

[0047] As shown in the figure, the opening edge of the liquid tank 2 of the ultrasonically enhanced vacuum bubble cake device for lithium-manganese button batteries is designed with an annular groove, and a first sealing ring 6 is positioned within this groove. Meanwhile, the cover 31 mates with the annular groove, and the lower edge of the cover 31 is equipped with a second sealing ring 7 that matches the first sealing ring 6 to achieve a tight seal.

[0048] As shown in the figure, a damping assembly 8 is installed at the bottom of the liquid tank 2. The support plate 32 decelerates and descends after contacting the damping assembly 8. The introduction of the damping assembly 8 effectively mitigates the impact force of the support plate 32 during its descent, preventing equipment damage or electrolyte splashing caused by impact. The smooth descent of the support plate 32 helps ensure uniform electrolyte penetration of the positive electrode cake, thereby improving battery performance and consistency.

[0049] like Figure 3-4 As shown, the lifting cover 3 of the ultrasonically strengthened vacuum bubble cake device for lithium-manganese button batteries is driven up and down by a cylinder. A guide member k is provided on the side wall of the cover 31, one end of which is slidably disposed 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, preventing problems such as electrolyte leakage or equipment damage caused by shaking or deviation.

[0050] The above describes the button-type battery positive electrode cake turnover plate, online electrolyte cake soaking equipment, and impregnation method provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the present invention and its core concept. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. Ultrasonic enhanced vacuum foaming equipment for lithium manganese button batteries, characterized by The cam is provided with a plurality of support plates, the support plates are connected to the bottom of the cam via a connecting column, and ...

2. The ultrasonic enhanced vacuum bubble cake device for lithium manganese button batteries according to claim 1, characterized in that The tray bottom comprises a plurality of continuously wave-shaped inclined strip walls, adjacent strip walls forming strip grooves or strip ridges on the upper surface of the tray 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, characterized in that 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 pressing and sealing with the first sealing ring.

4. The ultrasonic enhanced vacuum bubble cake device for lithium manganese button batteries according to claim 1, characterized in that The turnover plate includes 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. 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 move up and down. A guide piece is provided 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 foaming device for lithium manganese button batteries according to claim 7, characterized in that The tray bottom comprises a plurality of continuous wavy strip-shaped walls, adjacent strip-shaped walls forming strip-shaped grooves or strip-shaped ridges on the upper surface of the tray bottom, and a plurality of first through holes are transversely arranged on the strip-shaped walls.

9. The ultrasonic enhanced vacuum foaming device for lithium manganese button batteries according to claim 7, characterized in that It comprises a second pair of side walls, wherein the upper edges of the second pair of side walls are provided with upwardly protruding tool clamping portions, and the second pair of side walls are laterally provided with a plurality of second through holes.

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