Ultrasonic debubbling structure and pole piece production equipment

Abstract

The present disclosure provides an ultrasonic debubbling structure and a pole piece production equipment. The ultrasonic debubbling structure comprises an ultrasonic kettle and an ultrasonic wave generating assembly. The ultrasonic kettle is formed with a first accommodating cavity. The ultrasonic kettle further comprises a first communication pipe. One end of the first communication pipe is fixed to the top of the ultrasonic kettle and is in communication with the first accommodating cavity. The other end of the first communication pipe is used to communicate with a negative pressure end of a vacuum system. The first accommodating cavity is used to accommodate paint. The generating end of the ultrasonic wave generating assembly is arranged in the first accommodating cavity. The generating end of the ultrasonic wave generating assembly is used to generate ultrasonic waves and transmit the ultrasonic waves to the paint in the first accommodating cavity. The ultrasonic debubbling structure can effectively remove the gas in the paint and improve the production quality of the pole piece.

Description

Technical Field

[0001] This disclosure relates to the technical field of electrode production equipment, and in particular to an ultrasonic defoaming structure and electrode production equipment. Background Technology

[0002] Silicon-carbon anode materials are used as anodes in lithium-ion batteries mainly because they combine the high capacity advantage of silicon with the stability of carbon materials, which can significantly improve battery performance. The higher the silicon content, the higher the energy density of the lithium battery. However, the anode slurry (a mixture of graphite and silicon-carbon) produces hydrogen gas due to the reaction of silicon and water. The higher the silicon content, the more gas is produced. The presence of gas in the slurry greatly reduces the uniformity of the coating of the electrode sheet, which in turn leads to abnormalities such as poor appearance of the electrode sheet, thus greatly reducing the production quality of the electrode sheet.

[0003] The currently developed 5%-10% low-silicon first-generation anode formula produces relatively little gas. The coating buffer tank is sealed, and a vacuum device is added to the tank lid to simultaneously extract the gas generated by the slurry while it is being stirred in the tank, thereby achieving the purpose of defoaming the coating.

[0004] Adding a vacuum device to the coating tank can largely eliminate the gas generated by the 5-10% low-silicon first-generation formulation. However, as the energy density of lithium batteries continues to increase, the 10-30% medium-silicon second-generation formulation is under development. Coatings using the medium-silicon formulation generate more gas than those using the low-silicon formulation. Therefore, the technical solution of adding a vacuum device to the coating buffer tank cannot effectively remove the gas in the coatings using the medium-silicon formulation. A large amount of gas remains in the coating, which greatly reduces the coating uniformity of the electrode and leads to abnormalities such as poor appearance of the electrode, thus greatly reducing the production quality of the electrode. Utility Model Content

[0005] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide an ultrasonic defoaming structure and electrode production equipment that can effectively remove gas from coatings and improve the production quality of electrode sheets.

[0006] The purpose of this disclosure is achieved through the following technical solution:

[0007] An ultrasonic defoaming structure includes an ultrasonic vessel and an ultrasonic generating component.

[0008] The ultrasonic vessel has a first accommodating cavity. The ultrasonic vessel also includes a first connecting pipe. One end of the first connecting pipe is fixed to the top of the ultrasonic vessel and communicates with the first accommodating cavity. The other end of the first connecting pipe is used to communicate with the negative pressure end of the vacuum system. The first accommodating cavity is used to accommodate coating. The generating end of the ultrasonic wave generating component is located in the first accommodating cavity. The generating end of the ultrasonic wave generating component is used to generate ultrasonic waves and transmit the ultrasonic waves to the coating in the first accommodating cavity.

[0009] In one embodiment, the ultrasonic component further includes a driving power supply and an ultrasonic generator. The generating end of the ultrasonic generator is disposed in the ultrasonic generator. The power output end of the driving power supply is used to electrically connect to the energy conversion end of the ultrasonic generator. The generating end of the ultrasonic generator is disposed in the first accommodating cavity. The generating end of the ultrasonic generator is used to generate the ultrasonic waves and to transmit the ultrasonic waves to the coating material in the first accommodating cavity.

[0010] In one embodiment, the ultrasonic generator includes a transducer and an ultrasonic rod. The energy conversion end of the ultrasonic generator is disposed in the transducer. The power input end of the transducer is electrically connected to the power output end of the driving power supply. The transducer is used to convert electrical energy into mechanical vibration energy. The mechanical vibration output end of the transducer is used to be fixedly connected to the mechanical vibration input end of the ultrasonic rod. The generating end of the ultrasonic rod is disposed in the first receiving cavity, and the generating end of the ultrasonic rod is used to contact the coating of the first receiving cavity.

[0011] In one embodiment, the ultrasonic debubbling structure further includes a heat sink, which covers the transducer and is used to dissipate heat from the transducer.

[0012] In one embodiment, the ultrasonic defoaming structure further includes a first vacuum filter, which is installed on and connected to the first connecting pipe, and is positioned between the vacuum system and the ultrasonic vessel.

[0013] In one embodiment, the top of the ultrasonic vessel has a communicating hole that communicates with the first receiving cavity, the mechanical vibration input end of the ultrasonic rod passes through the communicating hole, and the outer peripheral wall of the mechanical vibration input end of the ultrasonic rod is sealed to the hole wall of the communicating hole.

[0014] In one embodiment, the heat sink has a cooling water receiving cavity, a cooling water inlet communicating with the cooling water receiving cavity is formed at the bottom of the heat sink, and a cooling water outlet communicating with the cooling water receiving cavity is formed at the top of the heat sink. The cooling water outlet is connected to the cooling water inlet through the cooling water receiving cavity.

[0015] In one embodiment, the ultrasonic vessel has a sound-insulating interlayer inside its peripheral wall.

[0016] An electrode production device includes an ultrasonic defoaming structure as described in any of the above embodiments, wherein the ultrasonic defoaming structure is used to perform ultrasonic defoaming operation on the coating in the first receiving cavity.

[0017] In one embodiment, the electrode production equipment further includes a stirring and defoaming structure, which includes a buffer stirring tank, a second connecting pipe, and a third connecting pipe. The buffer stirring tank forms a second receiving cavity for containing stirring coating material. One end of the second connecting pipe is fixed to the top of the buffer stirring tank and communicates with the second receiving cavity. The other end of the second connecting pipe is used to communicate with the negative pressure end of the vacuum system. One end of the third connecting pipe is fixed to the bottom of the buffer stirring tank and communicates with the second receiving cavity. The other end of the third connecting pipe is fixed to the bottom of the ultrasonic vessel and communicates with the first receiving cavity.

[0018] In one embodiment, the electrode production equipment further includes a coating filter and a screw pump. Both the screw pump and the coating filter are installed in the third connecting pipe and are connected to the third connecting pipe. The suction end of the screw pump is connected to the second receiving cavity through the third connecting pipe, and the discharge end of the screw pump is connected to the first receiving cavity through the third connecting pipe. The coating filter is located between the screw pump and the ultrasonic vessel.

[0019] In one embodiment, the stirring and defoaming structure further includes a second vacuum filter, which is installed on and connected to the second connecting pipe, and is positioned between the vacuum system and the buffer stirring tank.

[0020] In one embodiment, the electrode production equipment further includes a coating valve and a die head, wherein the ultrasonic reactor, the coating valve and the die head are connected in sequence, and the die head is used to perform coating operations on the electrode.

[0021] In one embodiment, the electrode production equipment further includes an electrode baking structure, the die head is used to coat the electrode on the electrode baking structure, and the electrode baking structure is used to bake the coated electrode.

[0022] Compared with the prior art, this disclosure has at least the following advantages:

[0023] 1. The aforementioned ultrasonic defoaming structure, in which the ultrasonic vessel forms a first receiving cavity, also includes a first connecting pipe. One end of the first connecting pipe is fixed to the top of the ultrasonic vessel and connected to the first receiving cavity, while the other end is connected to the negative pressure end of the vacuum system. The first receiving cavity is used to contain the coating material, allowing the vacuum system to extract the gas from the first receiving cavity through the first connecting pipe, thus creating a vacuum environment within the first receiving cavity. This ensures that the coating material within the first receiving cavity is in a vacuum environment, preventing gas from entering the coating material. Simultaneously, when gas is discharged from the coating material, the vacuum system can quickly extract the gas, effectively preventing gas from re-entering the coating material and significantly reducing the gas content within the coating material. This greatly improves the production quality of the coating material, thereby significantly improving the coating uniformity of the electrode sheet and effectively preventing abnormal phenomena such as poor appearance of the electrode sheet, thus greatly improving the production quality of the electrode sheet.

[0024] 2. Since the generating end of the ultrasonic wave generator is located within the first accommodating cavity, it generates ultrasonic waves and transmits them to the coating material within the cavity. This allows the ultrasonic defoaming structure to effectively remove gas from the coating material through the ultrasonic cavitation effect. Specifically, when the generating end of the ultrasonic wave generator transmits ultrasonic waves to the coating material within the first accommodating cavity, the coating material generates periodically varying high-frequency mechanical vibrations. This creates alternating high and low pressure zones within the coating material. The resulting low-pressure zones rapidly reduce the local pressure within the coating material to below its saturated vapor pressure, causing the coating to vaporize and form tiny cavitation bubbles. Cavities rapidly absorb surrounding gas and expand quickly. As the ultrasonic cycle changes, cavities that were originally in a low-pressure region suddenly enter a high-pressure region. At this point, the internal pressure of the cavities is much lower than the external pressure, causing the cavities to be subjected to strong compression and shrink rapidly. This results in the cavities growing and contracting rapidly under the continuous action of the ultrasonic waves, eventually bursting instantly. This allows the gas in the coating to be expelled from the coating. Compared to the aforementioned related technologies that use stirring and vacuuming of the coating to remove bubbles, the ultrasonic defoaming structure disclosed herein can more effectively remove gas from the coating, greatly improving the coating uniformity of the electrode sheets and effectively avoiding abnormal phenomena such as poor appearance of the electrode sheets, further improving the production quality of the electrode sheets. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the electrode production equipment;

[0027] Figure 2 This is a schematic diagram of the specific structure of an ultrasonic defoaming structure according to one embodiment;

[0028] Figure 3 for Figure 1 A partially enlarged schematic diagram of the electrode production equipment shown;

[0029] Figure 4 for Figure 1 Another enlarged schematic diagram of the electrode production equipment shown. Detailed Implementation

[0030] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0034] like Figures 1 to 4 As shown, an ultrasonic defoaming structure 100 of one embodiment includes an ultrasonic vessel 110 and an ultrasonic generating component 120. The ultrasonic vessel 110 forms a first receiving cavity (not shown). The ultrasonic vessel also includes a first connecting pipe 130. One end of the first connecting pipe 130 is fixed to the top of the ultrasonic vessel 110 and communicates with the first receiving cavity. The other end of the first connecting pipe 130 is used to communicate with the negative pressure end of a vacuum system. The first receiving cavity is used to contain coating material so that the vacuum system can extract the gas in the first receiving cavity through the first connecting pipe 130, thereby forming a vacuum environment in the first receiving cavity. This allows the coating material in the first receiving cavity to be in a vacuum environment, preventing the gas in the first receiving cavity from entering the coating material. At the same time, when the gas in the coating material is discharged from the coating material, the vacuum system can quickly extract the gas, effectively preventing the gas from re-entering the coating material, greatly reducing the gas content in the coating material, greatly improving the production quality of the coating material, and thus greatly improving the coating uniformity of the electrode sheet. This effectively avoids abnormal phenomena such as poor appearance of the electrode sheet, thereby greatly improving the production quality of the electrode sheet.

[0035] Furthermore, the generating end of the ultrasonic generating component 120 is located inside the first accommodating cavity. The generating end of the ultrasonic generating component 120 is used to generate ultrasonic waves and transmit the ultrasonic waves to the coating material inside the first accommodating cavity. This allows the ultrasonic defoaming structure 100 to effectively remove gas from the coating material through the principle of ultrasonic cavitation effect. Compared with the above-mentioned related technologies that use stirring and vacuuming of the coating material to remove bubbles, the ultrasonic defoaming structure 100 of this disclosure can remove gas from the coating material more effectively, which greatly improves the coating uniformity of the electrode sheet and effectively avoids abnormal phenomena such as poor appearance of the electrode sheet, thereby greatly improving the production quality of the electrode sheet.

[0036] In this embodiment, when the ultrasonic generating component 120 transmits ultrasonic waves into the coating, the coating generates high-frequency mechanical vibrations that vary with the period, causing the coating to form alternating high and low pressure regions. The low-pressure regions rapidly reduce the local pressure in the coating to below the coating's saturated vapor pressure, causing the coating to vaporize and form tiny bubbles. These bubbles rapidly absorb surrounding gas and expand rapidly. As the ultrasonic cycle changes, the bubbles that were originally in the low-pressure region suddenly enter the high-pressure region. At this time, the pressure inside the bubble is much lower than the external pressure, causing the bubble to be subjected to strong compression and shrink rapidly. Under the continuous action of the ultrasonic waves, the generated bubbles will rapidly grow and contract, eventually bursting instantly, thereby allowing the gas inside the coating to be discharged from the coating.

[0037] The aforementioned ultrasonic defoaming structure 100, due to the ultrasonic vessel 110 forming a first receiving cavity, and the ultrasonic vessel further including a first connecting pipe 130, one end of the first connecting pipe 130 is fixed to the top of the ultrasonic vessel 110 and connected to the first receiving cavity, and the other end of the first connecting pipe 130 is used to connect to the negative pressure end of the vacuum system. The first receiving cavity is used to contain the coating, so that the vacuum system can extract the gas in the first receiving cavity through the first connecting pipe 130, so that a vacuum environment can be formed in the first receiving cavity, thereby allowing the coating in the first receiving cavity to be in a vacuum environment, preventing the gas in the first receiving cavity from entering the coating. At the same time, when the gas in the coating is discharged from the coating, the vacuum system can quickly extract the gas, effectively preventing the gas from re-entering the coating, greatly reducing the gas content in the coating, greatly improving the production quality of the coating, and thus greatly improving the coating uniformity of the electrode sheet, effectively avoiding abnormal phenomena such as poor appearance of the electrode sheet, thereby greatly improving the production quality of the electrode sheet.

[0038] Furthermore, since the generating end of the ultrasonic wave generator 120 is located within the first accommodating cavity, and the generating end of the ultrasonic wave generator 120 is used to generate ultrasonic waves and transmit them to the coating material within the first accommodating cavity, the ultrasonic defoaming structure 100 can effectively remove gas from the coating material through the principle of ultrasonic cavitation effect. Specifically, when the generating end of the ultrasonic wave generator 120 transmits ultrasonic waves to the coating material, the coating material will generate high-frequency mechanical vibrations that vary periodically, causing the coating material to form alternating high-frequency and low-pressure regions. The low-pressure regions generated will cause the local pressure in the coating material to rapidly decrease below the saturated vapor pressure of the coating material, causing the coating material to vaporize and form tiny bubbles. These bubbles will rapidly absorb the surrounding gas and their volume will rapidly decrease. Rapid expansion occurs as the ultrasonic cycle changes, causing the cavitation bubbles, originally in a low-pressure region, to suddenly enter a high-pressure region. At this point, the pressure inside the cavitation bubble is much lower than the external pressure, resulting in strong compression and rapid volume reduction. Under the continuous action of the ultrasonic waves, the generated cavitation bubbles rapidly grow and contract, eventually bursting instantly. This allows the gas inside the coating to escape from the coating. Compared to the aforementioned related technologies that use stirring and vacuuming of the coating to remove bubbles, the ultrasonic defoaming structure 100 disclosed herein can more effectively remove the gas inside the coating, greatly improving the coating uniformity of the electrode sheet and effectively avoiding abnormal phenomena such as poor appearance of the electrode sheet, thereby greatly improving the production quality of the electrode sheet.

[0039] like Figures 1 to 2As shown, in one embodiment, the ultrasonic component further includes a driving power supply 121 and an ultrasonic generator 122. The generating end of the ultrasonic generator 120 is disposed in the ultrasonic generator 122. The power output end of the driving power supply 121 is used to electrically connect to the energy conversion end of the ultrasonic generator 122. The generating end of the ultrasonic generator 122 is disposed in the first accommodating cavity. The generating end of the ultrasonic generator 122 is used to generate ultrasonic waves and transmit the ultrasonic waves to the coating material in the first accommodating cavity. When the driving power supply 121 transmits power to the energy conversion end of the ultrasonic generator 120, the energy conversion end of the ultrasonic generator 120 can convert electrical energy into mechanical vibration energy, and transmit the mechanical vibration energy in the form of ultrasonic waves to the coating material in the first accommodating cavity through the generating end of the ultrasonic generator 120. This allows an ultrasonic cavitation effect to be formed in the coating material, thereby enabling the ultrasonic defoaming structure 100 to effectively remove gas from the coating material. This greatly improves the coating uniformity of the electrode sheet, effectively avoids abnormal phenomena such as poor appearance of the electrode sheet, and thus greatly improves the production quality of the electrode sheet.

[0040] like Figures 1 to 2 As shown, in one embodiment, the ultrasonic generator 122 includes a transducer 1221 and an ultrasonic rod 1222. The energy conversion end of the ultrasonic generator 122 is located in the transducer 1221. The power input end of the transducer 1221 is electrically connected to the power output end of the drive power supply 121. The transducer 1221 is used to convert electrical energy into mechanical vibration energy. The mechanical vibration output end of the transducer 1221 is fixedly connected to the mechanical vibration input end of the ultrasonic rod 1222. The generating end of the ultrasonic rod 1222 is located in the first receiving cavity. The ultrasonic rod 1222 is used to contact the coating in the first receiving cavity. The ultrasonic rod 1222 is used to amplify the amplitude of the mechanical vibration output by the mechanical vibration output end of the transducer 1221, so as to increase the ultrasonic intensity transmitted by the ultrasonic rod 1222 to the coating in the first receiving cavity, thereby greatly improving the ultrasonic cavitation effect of the coating, and thus enabling the ultrasonic defoaming structure 100 to remove the gas in the coating more effectively.

[0041] It should be noted that the specific structure and working principle of the transducer 1221 and the ultrasonic rod 1222 are existing technologies and will not be elaborated further here.

[0042] like Figures 1 to 2As shown, in one embodiment, the ultrasonic debubbling structure 100 further includes a heat sink 140, which covers the transducer 1221. The heat sink 140 is used to dissipate heat from the transducer 1221, which not only keeps the transducer 1221 within the normal operating temperature range through the heat sink 140, ensuring that the transducer 1221 can work stably, but also prevents the transducer 1221 from being damaged or even destroyed due to excessive temperature, thereby greatly improving the stability and service life of the ultrasonic debubbling structure 100.

[0043] like Figures 1 to 3 As shown, in one embodiment, the ultrasonic defoaming structure 100 further includes a first vacuum filter 150. The first vacuum filter 150 is installed on and connected to the first connecting pipe 130. The first vacuum filter 150 is used to be located between the vacuum system and the ultrasonic vessel 110 so that the first vacuum filter 150 can prevent the coating from entering the vacuum system through the first connecting pipe 130, effectively avoiding the coating from clogging or even corroding the vacuum system, ensuring that the vacuum system can work stably and normally, and thus greatly improving the service life of the vacuum system.

[0044] like Figures 1 to 2 As shown, in one embodiment, the top of the ultrasonic vessel 110 has a connecting hole (not shown) that communicates with the first receiving cavity. The mechanical vibration input end of the ultrasonic rod 1222 passes through the connecting hole, and the outer peripheral wall of the mechanical vibration input end of the ultrasonic rod 1222 is sealed to the hole wall of the connecting hole to prevent outside air from entering the first receiving cavity through the gap between the ultrasonic rod 1222 and the hole wall support of the connecting hole. This allows the first receiving cavity to form a sealed environment, thereby greatly improving the vacuum degree of the first receiving cavity. As a result, the gas in the first receiving cavity can be discharged more effectively through the first filter 130, further improving the production quality of the coating.

[0045] like Figures 1 to 2As shown, in one embodiment, the heat sink 140 forms a cooling water receiving cavity (not shown). The bottom of the heat sink 140 forms a cooling water inlet 141 that communicates with the cooling water receiving cavity, and the top of the heat sink 140 forms a cooling water outlet 142 that communicates with the cooling water receiving cavity. The cooling water outlet 142 is connected to the cooling water inlet 141 through the cooling water receiving cavity, so that the cooling water can fill the entire cooling water receiving cavity by its own gravity. This allows the transducer 1221 to effectively transfer the heat it generates to the cooling water, ensuring that the transducer 1221 can be maintained within the normal operating temperature range. At the same time, it can also prevent the transducer 1221 from being damaged or even destroyed due to excessive temperature. This greatly improves the stability and service life of the ultrasonic defoaming structure 100.

[0046] like Figures 1 to 2 As shown, in one embodiment, the ultrasonic vessel 110 has a sound-insulating interlayer (not shown) inside its peripheral wall to reduce the noise generated inside the ultrasonic vessel 110.

[0047] like Figures 1 to 2 As shown, in one embodiment, the sound insulation interlayer is a sound insulation cotton interlayer, so that the ultrasonic vessel 110 can have a better sound insulation effect.

[0048] This disclosure also provides an electrode production apparatus 10, including the ultrasonic defoaming structure 100 described in any of the above embodiments, the ultrasonic defoaming structure 100 being used to perform ultrasonic defoaming operation on the coating in the first receiving cavity.

[0049] like Figures 1 to 3As shown, in one embodiment, the electrode production equipment 10 further includes a stirring and defoaming structure 200. The stirring and defoaming structure 200 includes a buffer stirring tank 210, a second connecting pipe 220, and a third connecting pipe 230. The buffer stirring tank 210 forms a second receiving cavity. The buffer stirring tank 210 is used to contain the stirring coating material. It not only prevents coating material from depositing in the second receiving cavity and forming dry material on the inner bottom wall of the buffer stirring tank 210, but also shears and breaks up air bubbles in the coating material to eliminate air bubbles. One end of the second connecting pipe 220 is fixed to the top of the buffer stirring tank 210 and communicates with the second receiving cavity. The other end of the second connecting pipe 220 is used to communicate with the negative pressure end of a vacuum system, so that the second connecting pipe 220 can extract gas from the second receiving cavity, thereby reducing the air bubbles in the second receiving cavity. The system can create a vacuum environment, allowing the coating material in the second containment cavity to be in a vacuum environment, preventing gas from the second containment cavity from entering the coating material. At the same time, when gas is discharged from the coating material, the second connecting pipe 220 can quickly extract the gas, effectively preventing the gas from re-entering the coating material, thereby greatly reducing the gas content in the coating material. One end of the third connecting pipe 230 is fixed to the bottom of the buffer stirring tank 210 and connected to the second containment cavity, while the other end of the third connecting pipe 230 is fixed to the bottom of the ultrasonic kettle 110 and connected to the first containment cavity. This allows the coating material, after being defoamed by the stirring and defoaming structure 200, to enter the ultrasonic defoaming structure 100 for ultrasonic defoaming, greatly improving the defoaming effect of the electrode production equipment 10 and further improving the production quality of the coating material.

[0050] like Figures 1 to 3 As shown, in one embodiment, the electrode production equipment 10 further includes a coating filter 300 and a screw pump 400. Both the screw pump 400 and the coating filter 300 are installed in the third connecting pipe 230 and are connected to the third connecting pipe 230. The suction end of the screw pump 400 is connected to the second receiving cavity through the third connecting pipe 230, and the discharge end of the screw pump 400 is connected to the first receiving cavity through the third connecting pipe 230, so that the material in the second receiving cavity, after being defoamed by the stirring and defoaming structure 200, is... The coating material can be pumped into the first receiving chamber by the screw pump 400 for ultrasonic defoaming, effectively preventing the coating material in the first receiving chamber from flowing back into the second receiving chamber, thereby greatly improving the operational stability of the electrode production equipment 10 and the production quality of the coating material. The coating filter 300 is located between the screw pump 400 and the ultrasonic vessel 110 to filter the coating material in the second receiving chamber, so that the coating filter 300 can effectively remove particulate impurities from the coating material, thereby improving the production quality of the coating material and thus greatly improving the production quality of the electrode.

[0051] like Figures 1 to 2As shown, in one embodiment, the stirring and defoaming structure 200 further includes a second vacuum filter 240. The second vacuum filter 240 is installed on and connected to the second connecting pipe 220. The second vacuum filter 240 is used to be located between the vacuum system and the buffer stirring tank 210 so that the second vacuum filter 240 can prevent the coating from entering the vacuum system through the second connecting pipe 220, effectively avoiding the coating from clogging or even corroding the vacuum system, ensuring that the vacuum system can work stably and normally, and thus greatly improving the service life of the vacuum system.

[0052] like Figures 1 to 4 As shown, in one embodiment, the electrode production equipment 10 further includes a coating valve 500 and a die head 600. The ultrasonic reactor 110, the coating valve 500, and the die head 600 are connected in sequence. The die head 600 is used to coat the electrode, so that when the coating valve 500 is in the open state, the coating material in the ultrasonic reactor 110 can enter the die head 600 through the coating valve 500. When the coating valve 500 is in the closed state, the coating valve 500 can prevent the coating material in the ultrasonic reactor 110 from entering the die head 600. This allows the coating valve 500 to be opened when the electrode needs to be coated and closed when the electrode does not need to be coated, thereby effectively avoiding waste of coating material and greatly reducing the production cost of the electrode.

[0053] like Figures 1 to 3 As shown, in one embodiment, the electrode production equipment 10 further includes an electrode baking structure 700. The die head 600 is used to coat the electrode on the electrode baking structure 700. The electrode baking structure 700 is used to bake the coated electrode to remove moisture from the coating, eliminate residual stress in the electrode, prevent the electrode from curling or even cracking, and thus improve the production quality of the electrode.

[0054] It should be noted that the specific structure and working principle of the electrode baking structure 700 are existing technologies and will not be elaborated further here.

[0055] Compared with the prior art, this disclosure has at least the following advantages:

[0056] The aforementioned electrode production equipment 10, due to the ultrasonic reactor 110 forming a first receiving cavity, and the ultrasonic reactor also including a first connecting pipe 130, one end of the first connecting pipe 130 is fixed to the top of the ultrasonic reactor 110 and connected to the first receiving cavity, and the other end of the first connecting pipe 130 is used to connect to the negative pressure end of the vacuum system. The first receiving cavity is used to contain coating material, so that the vacuum system can extract the gas in the first receiving cavity through the first connecting pipe 130, so that a vacuum environment can be formed in the first receiving cavity, thereby allowing the coating material in the first receiving cavity to be in a vacuum environment, preventing the gas in the first receiving cavity from entering the coating material. At the same time, when the gas in the coating material is discharged from the coating material, the vacuum system can quickly extract the gas, effectively preventing the gas from re-entering the coating material, greatly reducing the gas content in the coating material, greatly improving the production quality of the coating material, and thus greatly improving the coating uniformity of the electrode, effectively avoiding abnormal phenomena such as poor appearance of the electrode, thereby greatly improving the production quality of the electrode.

[0057] 2. Since the generating end of the ultrasonic generator 120 is located within the first accommodating cavity, the generating end of the ultrasonic generator 120 is used to generate ultrasonic waves and transmit them to the coating material within the first accommodating cavity. This allows the ultrasonic defoaming structure 100 to effectively remove gas from the coating material through the ultrasonic cavitation effect. Specifically, when the generating end of the ultrasonic generator 120 transmits ultrasonic waves to the coating material, the coating material generates high-frequency mechanical vibrations that vary periodically. This causes the coating material to form alternating high and low pressure regions. The low pressure regions generated cause the local pressure in the coating material to rapidly decrease below the saturated vapor pressure of the coating material, resulting in vaporization of the coating material and the formation of tiny bubbles. These bubbles rapidly absorb the surrounding gas, reducing their volume... Rapid expansion occurs as the ultrasonic cycle changes, causing the cavitation bubbles, initially in a low-pressure region, to suddenly enter a high-pressure region. At this point, the internal pressure of the cavitation bubble is much lower than the external pressure, resulting in strong compression and rapid volume reduction. Under the continuous action of the ultrasonic waves, the generated cavitation bubbles rapidly grow and contract, eventually rupturing instantaneously. This allows the gas inside the coating to escape from the coating. Compared to the aforementioned related technologies that use stirring and vacuuming of the coating for defoaming, the ultrasonic defoaming structure 100 disclosed herein can more effectively remove the gas inside the coating, greatly improving the coating uniformity of the electrode sheet and effectively avoiding abnormal phenomena such as poor appearance of the electrode sheet, thereby significantly improving the production quality of the electrode sheet.

[0058] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. An ultrasonic defoaming structure (100), characterized in that, The ultrasonic defoaming structure (100) includes an ultrasonic vessel (110) and an ultrasonic generating component (120). The ultrasonic vessel (110) has a first receiving cavity. The ultrasonic vessel (110) also includes a first connecting pipe (130). One end of the first connecting pipe (130) is fixed to the top of the ultrasonic vessel (110) and communicates with the first receiving cavity. The other end of the first connecting pipe (130) is used to communicate with the negative pressure end of the vacuum system. The first receiving cavity is used to contain the coating. The generating end of the ultrasonic generating component (120) is located in the first receiving cavity. The generating end of the ultrasonic generating component (120) is used to generate ultrasonic waves and transmit the ultrasonic waves to the coating in the first receiving cavity.

2. The ultrasonic defoaming structure (100) according to claim 1, characterized in that, The ultrasonic component further includes a driving power supply (121) and an ultrasonic generator (122). The generating end of the ultrasonic generator (120) is located in the ultrasonic generator (122). The power output end of the driving power supply (121) is used to electrically connect with the energy conversion end of the ultrasonic generator (122). The generating end of the ultrasonic generator (122) is located in the first accommodating cavity. The generating end of the ultrasonic generator (122) is used to generate the ultrasonic waves, and the generating end of the ultrasonic generator (122) is used to generate ultrasonic waves and transmit the ultrasonic waves to the coating in the first accommodating cavity.

3. The ultrasonic defoaming structure (100) according to claim 2, characterized in that, The ultrasonic generator (122) includes a transducer (1221) and an ultrasonic rod (1222). The energy conversion end of the ultrasonic generator (122) is located in the transducer (1221). The power input end of the transducer (1221) is electrically connected to the power output end of the driving power supply (121). The transducer (1221) is used to convert electrical energy into mechanical vibration energy. The mechanical vibration output end of the transducer (1221) is used to be fixedly connected to the mechanical vibration input end of the ultrasonic rod (1222). The generating end of the ultrasonic rod (1222) is located in the first accommodating cavity, and the generating end of the ultrasonic rod (1222) is used to contact the coating in the first accommodating cavity.

4. The ultrasonic defoaming structure (100) according to claim 3, characterized in that, The ultrasonic defoaming structure (100) further includes a heat sink (140), which covers the transducer (1221) and is used to dissipate heat from the transducer (1221).

5. The ultrasonic defoaming structure (100) according to claim 4, characterized in that, The ultrasonic defoaming structure (100) further includes a first vacuum filter (150), which is installed on and connected to the first connecting pipe (130). The first vacuum filter (150) is used to be disposed between the vacuum system and the ultrasonic vessel (110); and / or, The top of the ultrasonic vessel (110) has a communicating hole that communicates with the first receiving cavity. The mechanical vibration input end of the ultrasonic rod (1222) passes through the communicating hole, and the outer peripheral wall of the mechanical vibration input end of the ultrasonic rod (1222) is sealed to the wall of the communicating hole; and / or, The heat sink (140) has a cooling water receiving cavity, a cooling water inlet (141) communicating with the cooling water receiving cavity is formed at the bottom of the heat sink (140), and a cooling water outlet (142) communicating with the cooling water receiving cavity is formed at the top of the heat sink (140); the cooling water outlet (142) is connected to the cooling water inlet (141) through the cooling water receiving cavity; and / or, The ultrasonic vessel (110) has a sound-insulating interlayer inside its peripheral wall.

6. An electrode production apparatus (10), characterized in that, The ultrasonic defoaming structure (100) according to any one of claims 1 to 5 is used to perform ultrasonic defoaming operation on the coating in the first receiving cavity.

7. The electrode production equipment (10) according to claim 6, characterized in that, The electrode production equipment (10) further includes a stirring and defoaming structure (200), which includes a buffer stirring tank (210), a second connecting pipe (220), and a third connecting pipe (230). The buffer stirring tank (210) forms a second receiving cavity and is used to contain stirring coating. One end of the second connecting pipe (220) is fixed to the top of the buffer stirring tank (210) and communicates with the second receiving cavity. The other end of the second connecting pipe (220) is used to communicate with the negative pressure end of the vacuum system. One end of the third connecting pipe (230) is fixed to the bottom of the buffer stirring tank (210) and communicates with the second receiving cavity. The other end of the third connecting pipe (230) is fixed to the bottom of the ultrasonic vessel (110) and communicates with the first receiving cavity.

8. The electrode production equipment (10) according to claim 7, characterized in that, The electrode production equipment (10) further includes a coating filter (300) and a screw pump (400). Both the screw pump (400) and the coating filter (300) are installed in the third connecting pipe (230) and are connected to the third connecting pipe (230). The suction end of the screw pump (400) is connected to the second receiving cavity through the third connecting pipe (230), and the discharge end of the screw pump (400) is connected to the first receiving cavity through the third connecting pipe (230). The coating filter (300) is located between the screw pump (400) and the ultrasonic vessel (110); and / or, The stirring and defoaming structure (200) further includes a second vacuum filter (240), which is installed on and connected to the second connecting pipe (220). The second vacuum filter (240) is used to be located between the vacuum system and the buffer stirring tank (210).

9. The electrode production equipment (10) according to claim 6, characterized in that, The electrode production equipment (10) also includes a coating valve (500) and a die (600). The ultrasonic kettle (110), the coating valve (500) and the die (600) are connected in sequence. The die (600) is used to coat the electrode.

10. The electrode production equipment (10) according to claim 9, characterized in that, The electrode production equipment (10) further includes an electrode baking structure (700), the die head (600) is used to coat the electrode on the electrode baking structure (700), and the electrode baking structure (700) is used to bake the coated electrode.

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