CN112138563A - High solid content thick liquids agitating unit of positive negative pole of lithium cell - Google Patents

Abstract

The invention discloses a lithium battery slurry stirring device with high positive and negative solid contents, which comprises a stirring kettle body provided with a feeding hole and a discharging hole, and a horizontal stirring mechanism which is arranged on the stirring kettle body and used for stirring slurry, wherein a pressure sensor, a temperature sensor, a humidity sensor and a heating mechanism used for heating the inside of the stirring kettle body are fixed in the stirring kettle body, and a protective gas inlet and a protective gas outlet are formed in the upper part of the stirring kettle body. The invention can realize the rapid control of the internal environment of the stirring kettle before and during the stirring of the battery slurry. The stirring device is suitable for stirring slurry with high solid content of positive and negative electrodes of the lithium battery, and is used for monitoring and controlling the stirring environment in the stirring kettle body.

Description

Lithium battery positive and negative high solid content slurry stirring device

technical field

The invention belongs to the technical field of lithium battery slurry stirring, in particular to a lithium battery positive and negative electrode high solid content slurry stirring device.

Background technique

In the production process of lithium batteries, the stirring of positive and negative electrode slurry is the basis for determining the subsequent process. At this stage, the solid content of the positive electrode slurry is generally not higher than 70%-75%, because the slurry easily absorbs water in the air, and the slurry There are strict requirements on the water content in the slurry, so it is necessary to strictly control the environment during the slurry stirring process, so that the preparation of the lithium battery slurry can meet the production and use requirements. At present, in order to ensure that the material feeding into the stirring tank and the stirring environment in the stirring tank meet the stirring requirements, the method of controlling the environment of the entire workshop is usually adopted. Although this method can meet certain stirring requirements to a certain extent, it is not suitable for the large environment of the production workshop. The control requirements of temperature, humidity and pressure are very strict, the input and use costs are high, and the rapid controllability of the stirring environment inside the stirring tank is poor, which is likely to cause secondary pollution to the slurry.

In addition, most of the existing lithium battery slurry mixers are vertical stirring mechanisms, that is, the stirring shaft is arranged in the vertical direction. When the stirring shaft is stirring, the material falls directly downward under the action of gravity and cannot be fully stirred by the stirring paddle. The effect of force affects the uniformity of slurry stirring. In addition, in order to provide sufficient stirring power, the stirring shaft and stirring paddle in the vertical stirring mechanism are mostly supported by cantilever structure.

SUMMARY OF THE INVENTION

In order to solve the above deficiencies in the prior art, the present invention aims to provide a lithium battery positive and negative high solid content slurry stirring device, so as to achieve rapid and controllable internal environment of the stirring tank before and during the stirring of the battery slurry. the goal of.

In order to achieve the above purpose, the technical scheme adopted in the present invention is as follows: a lithium battery positive and negative high solid content slurry stirring device, comprising a stirring tank body provided with a feeding port and a discharging port, and a stirring tank body installed on the stirring tank body The horizontal stirring mechanism used for stirring the slurry. The pressure sensor, temperature sensor, humidity sensor and heating mechanism for heating the inside of the stirring tank are fixed in the stirring tank. The upper part of the stirring tank is provided with a protective gas inlet and outlet.

As a limitation of the present invention, the stirring mechanism is a horizontal double planetary agitator with double planetary transmission.

As another limitation of the present invention, the side wall of the stirring tank is sealed and fixed with the box assembly, the horizontal double planetary agitator is fixedly connected in the box assembly, and the stirring paddle and the disperser of the horizontal double planetary agitator are fixed in the box assembly. Extend into the stirring vessel.

As a further limitation of the present invention, a vibrator is fixedly connected in the box assembly, and a vibrator is fixedly connected in the box assembly for causing the box assembly to drive the horizontal stirring mechanism to vibrate and clear the material.

As a further limitation of the present invention, two sets of symmetrically arranged stirring mechanisms are installed on the stirring tank body, and each stirring mechanism is correspondingly installed in a box assembly.

As a third limitation of the present invention, both the pressure sensor and the humidity sensor are fixed on the inner wall of the upper side of the stirring tank body, and the heating mechanism is fixed on the inner wall of the lower side of the stirring tank body.

Due to adopting the above-mentioned technical scheme, compared with the prior art, the present invention has the following beneficial effects:

(1) In the present invention, a horizontal stirring mechanism is installed in the stirring tank. The stirring paddles installed in the horizontal direction make the stirring paddles rotate and stir the materials in the axial and radial directions at a certain angle, so that the materials can be mixed quickly and uniformly. Compared with the vertical mixing mechanism in the prior art, the power component of the horizontal mixing mechanism drives the driving shaft to rotate, so that the stirring paddle can be more fully mixed with the slurry of different particle sizes dropped by gravity during the slurry mixing process. , the mixing effect is more uniform, and the quality of mixing and discharging is guaranteed.

(2) The horizontal double planetary agitator used in the present invention can provide greater stirring power, and under the condition of the same power and the same power, the required supporting mechanical strength is smaller.

(3) In the process of slurry stirring, environmental control has a high impact on the quality of the slurry. By setting a vibrator, the present invention can vibrate the stirring paddle at a high frequency during stirring, so that the slurry adhering to the stirring paddle automatically slides off, and realizes the self-cleaning of the high-solid content slurry stirring in a sealed environment. The high-viscosity slurry adhering to the stirring paddle after the stirring is completely removed; instead of opening the stirring tank body for manual cleaning, the preparation of high-solid content slurry without opening the tank body is truly realized. Each sensor, gas inlet and outlet and heating mechanism on the kettle body realize the control of the small airtight environment in the whole process of slurry preparation. Compared with the method of controlling the large environment of the workshop in the prior art, it not only ensures the quality of the slurry, The production cost is also reduced, and the use and operation are convenient.

(4) In the present invention, a pressure sensor, a humidity sensor and a temperature sensor are arranged inside the stirring tank body, combined with the set protective gas inlet and outlet and heating mechanism, so that the preset environment in the stirring tank body can be monitored and controlled before stirring. It can also monitor and control the stirring environment in the stirring tank in real time during the stirring process, thereby ensuring the rapid and controllable stirring environment in the lithium battery slurry preparation process, and effectively preventing the secondary pollution of the slurry. The method of controlling the large environment of the working workshop in the prior art not only ensures the quality of the slurry, but also reduces the production cost, and is convenient to use and operate.

The invention is suitable for stirring the positive and negative high-solid content slurry of lithium batteries, and is used for monitoring and controlling the stirring environment in the stirring tank.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

In the figure: 1. Feeding port; 2. Discharging port; 3. Stirring tank body; 4. Pressure sensor; 5. Temperature sensor; 6. Humidity sensor; 7. Heating mechanism; 8. Protective gas inlet and outlet; 9. Horizontal double planetary agitator; 10. Box assembly; 11. Vibrator; 12. Rotation shaft.

Detailed ways

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and understand the present invention, but not to limit the present invention.

Example 1 A lithium battery positive and negative high solid content slurry stirring device

As shown in FIG. 1 , this embodiment includes a stirring tank body 3 , a box body assembly 10 and a horizontal stirring mechanism.

The upper part of the stirring tank body 3 is provided with a feeding port 1, and the lower part is provided with a feeding port 2. A pressure sensor 4 , a temperature sensor 5 , a humidity sensor 6 and a heating mechanism 7 are fixed in the stirring kettle body 3 , and a protective gas inlet and outlet 8 is opened on the upper part of the stirring kettle body 3 . The pressure sensor 4 is fixed on the inner wall of the upper side of the stirring tank body 3 for monitoring the air pressure in the stirring tank body 3; the temperature sensor 5 is used for monitoring the temperature in the stirring tank body 3, and the humidity sensor 6 is fixed on the lower side of the stirring tank body 3 The inner wall is used to monitor the humidity in the stirred tank body 3 . The heating mechanism 7 is fixed on the inner wall of the lower side of the stirring tank body 3 for heating the internal environment of the stirring tank body 3. The heating mechanism 7 adopts the heating structure used for the lithium battery slurry stirring tank body 3 in the prior art, and can be a cooling mechanism. Hot water heat exchange method. The protective gas inlet and outlet 8 are used to control the pressure of the gas in the stirred tank body 3 .

The horizontal stirring mechanism is used for stirring the slurry in the stirring tank body 3, and the axis of the stirring paddle of the horizontal stirring mechanism is arranged in the horizontal direction. The stirring mechanism adopts the horizontal double planetary stirrer 9 in the prior art. The horizontal double planetary agitator 9 may include a power assembly, a driving shaft, a rotation shaft 12, a planetary transmission assembly, a stirring paddle and a dispersing disc. The driving shaft of the horizontal double planetary agitator 9 extends in the horizontal direction. The driving shaft is fixedly connected, the driving shaft and the rotation shaft are connected by transmission through the planetary transmission assembly, and a stirring paddle and a dispersion disc are fixed on the driving shaft and the rotation shaft. The driving shaft is driven by the power component to drive the rotation shaft through the planetary transmission component, so that the stirring paddle stirs the slurry, and the dispersing disc completes the high-speed dispersion of the slurry. Two sets of symmetrically arranged horizontal stirring mechanisms are installed on the stirring tank body 3 , each horizontal stirring mechanism is correspondingly installed in a box assembly 10 , and each horizontal stirring mechanism is installed in the stirring tank through the box body assembly 10 . body 3.

The box assembly 10 is sealed and fixed to the side wall of the stirring tank body 3 by common sealing methods such as shaft end oil seals and labyrinth seals. The horizontal double planetary agitator 9 is fixedly connected in the box assembly 10, and the horizontal double planetary agitator The stirring paddle and disperser of the machine extend into the stirring tank body 3 . A vibrator 11 is fixedly connected in the box body assembly 10. The vibrator 11 adopts the method of a motor and an eccentric wheel in the prior art. The eccentric wheel is driven to rotate by the motor, and the vibrator 11 drives the box body assembly 10 and the inside of the box body assembly. The stirring paddle and the dispersing disc vibrate together to shake off the slurry adhering to the stirring paddle.

Example 2 A method for stirring high solid content slurry of positive and negative electrodes of lithium batteries

This embodiment is a method for stirring the positive and negative electrode high solid content slurry of a lithium battery realized by using the lithium battery positive and negative electrode high solid content slurry stirring device in Example 1, which includes the following steps:

S1. Adjust the internal environment of the stirring tank 3

The pressure sensor 4, temperature sensor 5 and humidity sensor 6 in the stirring tank body 3 monitor the pressure, temperature and humidity inside the stirring tank body 3, and control the protective gas inlet and outlet 8 on the upper part of the stirring tank body 3 to protect the stirring tank body 3. The transportation of the gas and the heating temperature of the heating mechanism 7 in the stirring tank body 3 make the environment in the stirring tank body 3 meet the preset environmental requirements before stirring.

S2. Stirring

The slurry is added into the stirring tank body 3 from the feeding port 1, so that the inside of the stirring tank body 3 is in a closed state; then the slurry in the stirring tank body 3 is stirred by the horizontal double planetary agitator 9. During the stirring process, The pressure sensor 4, temperature sensor 5 and humidity sensor 6 in the stirring tank body 3 monitor the pressure, temperature and humidity inside the stirring tank body, and control the protective gas inlet and outlet 8 on the upper part of the stirring tank body 3 to transfer the protective gas into the stirring tank body. And the heating temperature of the heating mechanism 7 in the stirring tank body, so that the stirring environment in the stirring tank body 3 meets the stirring requirements.

S3. Discharge

After the stirring is completed, the stirring paddle of the horizontal double planetary stirrer 9 is driven by the vibrator 11 to vibrate, and the slurry adhering to the stirring paddle is shaken off, and then the slurry in the stirring tank body 3 is output from the discharge port 2 .

It should be noted that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still The technical solutions described in the above embodiments are modified, or some technical features thereof are equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (6)

1. The utility model provides a high solid content thick liquids agitating unit of positive negative pole of lithium cell which characterized in that: including the stirred tank body that is equipped with feed inlet and discharge gate and install the horizontal rabbling mechanism that is used for stirring thick liquids on the stirred tank body, stirred tank internal fixation has pressure sensor, temperature sensor, humidity transducer and is used for the heating mechanism for stirred tank internal heating, and protective gas inlet and outlet has been seted up on stirred tank body upper portion.

2. The high positive and negative solid content slurry stirring device of the lithium battery as claimed in claim 1, wherein: the stirring mechanism is a horizontal double-planet stirrer with double-planet transmission.

3. The stirring device for slurry with high positive and negative solid contents for lithium batteries according to claim 1 or 2, characterized in that: the side wall of the stirring kettle body is hermetically fixed with a box body assembly, the horizontal stirring mechanism is fixedly connected in the box body assembly, and the stirring paddle and the disperser of the horizontal double-planet stirrer extend into the stirring kettle body.

4. The high positive and negative solid content slurry stirring device of the lithium battery as claimed in claim 3, wherein: the box body assembly is internally and fixedly connected with a vibrator which is used for driving the horizontal stirring mechanism to vibrate and clear materials.

5. The high positive and negative solid content slurry stirring device of the lithium battery as claimed in claim 4, wherein: two sets of stirring mechanisms symmetrically arranged are installed on the stirring kettle body, and each stirring mechanism is correspondingly installed in one box body assembly.

6. The stirring device for slurry with high positive and negative solid contents for lithium batteries according to any one of claims 1 to 2 and 4 to 5, characterized in that: pressure sensor and humidity transducer all fix on stirred tank body upside inner wall, and heating mechanism fixes on stirred tank body downside inner wall.

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