Rapid defoaming device for homogenate of lithium battery
By combining ultrasonic vibration and a negative pressure environment during the preparation of lithium battery slurry, bubbles can be quickly eliminated, solving the problem of ineffective bubble removal in lithium battery slurry and improving production efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-03-10
AI Technical Summary
In the existing technology, air bubbles cannot be effectively and quickly removed during the preparation of lithium battery slurry, resulting in uneven coating thickness and battery performance problems.
The system employs a combination of a feed pipe, a defoaming chamber, a vacuum pump, an ultrasonic probe, and a homogenizing heating device. It eliminates bubbles through ultrasonic vibration and a negative pressure environment, uses the ultrasonic probe to generate high-frequency vibration to cause the bubbles to converge and break, and reduces viscosity through homogenizing heating.
It achieves rapid and efficient bubble elimination, shortens defoaming time, improves the quality and production efficiency of lithium battery slurry, and avoids the use of chemical agents.
Smart Images
Figure CN223980141U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery manufacturing technology, specifically to a rapid defoaming device for lithium battery homogenization. Background Technology
[0002] The manufacturing principle of battery electrode slurry involves mixing solid powder and a binder. During the slurry preparation, friction between the binder and air easily generates air bubbles that remain within the slurry. Due to the surface tension of the slurry, these internal air bubbles cannot be effectively removed. These air bubbles in the slurry can cause uneven coating thickness during the coating process, leading to problems such as black spots and lithium plating at the battery interface during charging and discharging. Traditional wet slurry processes require equipment to perform slow stirring for a long time in a -85 kPa vacuum environment for defoaming, but this still results in low defoaming efficiency, poor effect, and uncontrollable defoaming performance. Utility Model Content
[0003] To address the problem of ineffective and rapid removal of air bubbles during the preparation of lithium battery slurry, this invention provides a rapid defoaming device for lithium battery slurry.
[0004] A rapid defoaming device for lithium battery slurry includes: a feed pipe, a defoaming chamber, a vacuum pump, an ultrasonic probe, and a slurry heating device; the feed pipe is connected to the high side wall of the defoaming chamber, pumping the slurry prepared in an external slurry container into the defoaming chamber; the ultrasonic probe is disposed in the defoaming chamber, generating ultrasonic waves by modulating a high-frequency voltage to promote high-frequency vibration and convergence and rupture of bubbles in the slurry; the slurry heating device is disposed in the defoaming chamber to heat the slurry and reduce its viscosity; the vacuum pump is disposed in the defoaming chamber to control the defoaming chamber to maintain a negative pressure environment.
[0005] Preferably, the ultrasonic probe includes: an ultrasonic generator, an ultrasonic transducer, and a control module; the ultrasonic generator generates an electrical signal with adjustable power and frequency and supplies power to the ultrasonic transducer; the ultrasonic transducer converts electrical energy into high-frequency ultrasonic waves, causing bubbles in the homogenate to vibrate and coalesce into large bubbles before bursting; the control module is communicatively connected to the ultrasonic generator and controls the power and frequency of the electrical signal generated by the ultrasonic generator.
[0006] Preferably, the negative pressure inside the defoaming chamber is -80 to -90 kPa.
[0007] Preferably, the homogenizing heating device controls the homogenizing temperature in the defoaming chamber to be maintained at 45°C.
[0008] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0009] The technical solution provided by this utility model includes: a feeding pipe, a defoaming chamber, a vacuum pump device, an ultrasonic probe, and a homogenizing heating device; this application uses ultrasonic defoaming, which is efficient, environmentally friendly, and controllable, without the need for chemical agents, thus improving product quality and production efficiency; ultrasonic defoaming can cause the homogenizing to vibrate in all directions, shortening the defoaming time and overcoming the shortcomings of long defoaming time in stirring methods; finally, by adjusting the ultrasonic emission voltage and frequency, the signal power is changed, and the defoaming process and rate are controllable. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the composition of the lithium battery homogenization and rapid defoaming device of this utility model. Detailed Implementation
[0011] To better understand this utility model, the following description, in conjunction with the accompanying drawings and examples, will further illustrate its contents.
[0012] A rapid defoaming device for lithium battery slurry homogenization is shown in the schematic diagram below. Figure 1 As shown, it includes: a feed pipe, a defoaming chamber, a vacuum pump device, an ultrasonic probe, and a homogenizing heating device.
[0013] The feed pipe is connected to the high side wall of the defoaming chamber, pumping the slurry prepared in the external homogenizer into the defoaming chamber. The ultrasonic probe is positioned within the defoaming chamber, generating ultrasonic waves through high-frequency voltage modulation to promote high-frequency vibration and collapse of bubbles in the slurry. The homogenizer heating device is located within the defoaming chamber to heat the slurry and reduce its viscosity. The vacuum pump device is located within the defoaming chamber to maintain a negative pressure environment. This application utilizes the enormous energy generated by cavitation to strongly disperse the homogenized liquid. This cavitation effect eliminates a large number of tiny bubbles within the liquid, causing them to coalesce into larger bubbles and then break, achieving the defoaming and degassing requirements. The principle of ultrasonic defoaming in this application is as follows: when ultrasonic waves propagate in a liquid, they generate strong vibrations. These vibrations are transmitted to the surface layer of the liquid, reducing surface tension and thus decreasing foam stability. Using an ultrasonic defoaming efficiency block, the elimination of adhesive bubbles can be completed in 5 minutes, with high defoaming efficiency and controllable effect.
[0014] The ultrasonic probe includes an ultrasonic generator, an ultrasonic transducer, and a control module. The ultrasonic generator produces an electrical signal with adjustable power and frequency, and supplies power to the ultrasonic transducer. The ultrasonic transducer converts the electrical energy into high-frequency ultrasonic waves, causing bubbles in the homogenate to vibrate and coalesce into larger bubbles, which then burst. The control module is communicatively connected to the ultrasonic generator and controls the power and frequency of the electrical signal generated by the ultrasonic generator. Wet defoaming processes are time-consuming, requiring at least 60 minutes each time. Using ultrasound, the defoaming process can be reduced to 5 minutes. In actual use, the defoaming process can be controlled by adjusting the ultrasonic emission voltage and frequency to change the signal power.
[0015] The negative pressure inside the defoaming chamber is -80~-90 kPa.
[0016] The homogenizing heating device controls the homogenizing temperature in the defoaming chamber to be maintained at 45°C.
[0017] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
Claims
1. A homogenate rapid defoaming device for lithium batteries, characterized in that, The lithium battery homogenate rapid defoaming device comprises a feeding pipeline, a defoaming cavity, a vacuum pump device, an ultrasonic probe and a homogenate heating device; The feeding pipeline is in communication with the high side wall of the defoaming cavity, and the homogenate prepared in the external homogenate tank is pumped into the defoaming cavity; the ultrasonic probe is arranged in the defoaming cavity, generates ultrasonic waves by modulating high-frequency voltage, promotes the high-frequency vibration of the bubbles in the homogenate and gathers and breaks the bubbles; the homogenate heating device is arranged in the defoaming cavity, heats the homogenate and reduces the viscosity of the homogenate; and the vacuum pump device is arranged in the defoaming cavity and controls the negative pressure environment in the defoaming cavity.
2. The lithium battery homogenate rapid defoaming device according to claim 1, characterized in that, The ultrasonic probe comprises an ultrasonic generator, an ultrasonic transducer and a control module; The ultrasonic generator generates power-adjustable and frequency-adjustable electric signals and supplies power to the ultrasonic transducer; the ultrasonic transducer converts electric energy into high-frequency ultrasonic waves, makes the bubbles in the homogenate vibrate and gather into large bubbles and then break; and the control module is in communication connection with the ultrasonic generator and controls the power and frequency of the electric signals generated by the ultrasonic generator.
3. The lithium battery homogenate rapid defoaming device of claim 1, wherein, The negative pressure in the defoaming cavity is -80~ -90 Kpa.
4. The lithium battery homogenate rapid defoaming device of claim 1, wherein, The homogenate heating device controls the temperature of the homogenate in the defoaming cavity to be maintained at 45 DEG C.