Double-string linkage stirring device

Abstract

The utility model discloses a double-string linkage stirring device. The double-string linkage stirring device comprises a first stirring hopper, a second stirring hopper and a serial pipeline for connecting the first stirring hopper and the second stirring hopper, the first stirring hopper comprises a first hopper cover and a first hopper groove connected with the first hopper cover, and the second stirring hopper comprises a second hopper cover and a second hopper groove connected with the second hopper cover. The height of the end, connected with the first hopper groove, of the series-connection pipeline is larger than that of the end, connected with the second hopper groove, of the series-connection pipeline, and a throttling valve is arranged on the series-connection pipeline. The utility model solves the problems that the current single servo motor stirring device is slow in rotating, stirring and dispersing, and the slurry quality is poorer.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and specifically relates to a double-series dynamic stirring device. Background Art

[0002] The mixing and dispersion process has an impact of more than 30% on the quality of the product in the entire production process of lithium-ion batteries, and is the most important link in the entire production process. In the manufacture of lithium-ion battery electrodes, the positive electrode slurry is composed of a binder, a conductive agent, a positive electrode material, etc.; the negative electrode slurry is composed of a binder, graphite carbon powder, etc. In the positive and negative electrode slurries, the dispersion and uniformity of the granular active substances directly affect the movement of lithium ions between the two poles of the battery. Therefore, the mixing and dispersion of the slurries of various pole sheet materials is crucial in the production of lithium-ion batteries. The quality of slurry dispersion directly affects the quality of subsequent lithium-ion battery production and the performance of its products. At present, a single servo motor is generally used as the rotation force of the mixer to mix the slurry, but using a single servo motor to rotate and stir, the dispersion is slow and the slurry quality is poor. Utility Model Content

[0003] The technical problem solved by the utility model is: to provide a double-series stirring device, which solves the problem that the current single servo motor stirring device rotates slowly, stirs and disperses, and has poor slurry quality.

[0004] The technical solution of the utility model is: to provide a double-series dynamic stirring device, comprising a first stirring hopper, a second stirring hopper and a series pipeline connecting the first stirring hopper and the second stirring hopper;

[0005] The first stirring hopper includes a first hopper cover and a first hopper trough connected to the first hopper cover, the second stirring hopper includes a second hopper cover and a second hopper trough connected to the second hopper cover, the height of the series pipe connected to the first hopper trough is greater than the height of the end connected to the second hopper trough, and a throttle valve is provided on the series pipe.

[0006] Furthermore, the double-tandem dynamic stirring device also includes a first power unit and a second power unit, the first power unit is detachably connected to the first hopper cover, and the second power unit is detachably connected to the second hopper cover.

[0007] Furthermore, the first hopper trough is provided with a first paddle, the second hopper trough is provided with a second paddle, the power shaft of the first power unit passes through the first hopper cover and is detachably connected to the first paddle, and the power shaft of the second power unit passes through the second hopper cover and is detachably connected to the second paddle.

[0008] Furthermore, the first blade and the second blade both include blade blades and plane blades.

[0009] Furthermore, the first hopper cover is also provided with a feed port, through which powder is fed into the first stirring hopper.

[0010] Furthermore, a slurry discharge pipe is provided on the side of the second hopper trough facing the ground.

[0011] Furthermore, the first hopper trough and the second hopper trough are respectively provided with a first leakage screen and a second leakage screen, wherein in the vertical direction, the height of the first leakage screen is greater than the height of the series pipes, the height of the second leakage screen is less than the height of the series pipes, and the height of the second leakage screen is greater than the height of the slurry outlet pipe.

[0012] Furthermore, a first buckle is provided on a side of the first hopper trough close to the first hopper cover, and the first hopper trough and the first hopper cover are detachably connected via the first buckle; a second buckle is provided on a side of the second hopper trough close to the second hopper cover, and the second hopper cover and the second hopper trough are detachably connected via the second buckle.

[0013] Furthermore, the first hopper cover and the second hopper cover are provided with a first handle and a second handle, respectively, and the first handle and the second handle are respectively provided at the center of the first hopper cover and the center of the second hopper cover.

[0014] Furthermore, the double-tandem dynamic stirring device also includes a first bracket and a second bracket, the first bracket is detachably connected to the first stirring hopper, and the second bracket is detachably connected to the second stirring hopper.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a double-series dynamic stirring device, wherein the powder is first introduced into the first stirring hopper for preliminary stirring, and then the slurry simply dispersed in the first stirring hopper is transported to the second stirring hopper through the series pipeline for fine stirring, and then the evenly mixed slurry is output through the slurry outlet pipeline. Batch stirring can reduce the driving resistance of the servo electrode, break up the high-speed dispersed particles, and is more conducive to the smooth movement of the mechanical dispersion disk.

[0017] The utility model conveniently controls the slurry discharge speed of the stirring device and controls the fineness of the slurry by setting the height of the end connected to the first hopper trough and the height of the end connected to the second hopper trough and a throttle valve in series. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A first structural schematic diagram of a double-tandem stirring device provided in an embodiment of the utility model;

[0020] Figure 2 A second structural schematic diagram of a double-series stirring device provided in an embodiment of the utility model.

[0021] Description of reference numerals:

[0022] 1-first stirring hopper, 2-second stirring device, 3-series pipeline, 4-throttle valve;

[0023] 11-first hopper cover, 12-first hopper slot, 13-first power unit, 14-first bracket, 15-first buckle, 21-second hopper cover, 22-second hopper slot, 23-second power unit, 24-second bracket, 25-second buckle, 26-slurry outlet pipe;

[0024] 111 - first handle, 112 - feed port, 121 - first screen, 122 - first paddle, 211 - second handle, 221 - second screen, 222 - second paddle. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the present invention, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0027] The following is a detailed description of the implementation of the present invention in conjunction with the specific drawings:

[0028] Figure 1A first structural schematic diagram of a double-tandem dynamic stirring device provided in an embodiment of the utility model, a double-tandem dynamic stirring device provided in this embodiment comprises a first stirring hopper 1 and a second stirring device 2, the first stirring hopper 1 comprises a first hopper cover 11 and a first hopper trough 12, the second stirring device 2 comprises a second hopper cover 21 and a second hopper trough 22, the first stirring hopper 1 is connected to the second stirring device 2 through a series pipe 3, a throttle valve 4 is provided in the middle of the series pipe 3, the throttle valve 4 is used to control the slurry discharge speed of the first stirring hopper, thereby controlling the fineness of the slurry, the preliminarily mixed slurry flows into the second hopper trough 22 for further fine stirring to form a uniform and stable solid-liquid suspension system; the height of the end of the series pipe 3 connected to the first hopper trough 12 is set to be greater than the height of the end connected to the second hopper trough 22, so that the preliminarily mixed slurry flows into the second hopper trough 22, and a slurry discharge pipe 25 is provided at the bottom of the second hopper trough 22 to output the mixed slurry.

[0029] A first buckle 15 is provided on one side of the first hopper trough 12 close to the first hopper cover 11, and the first hopper trough 12 and the first hopper cover 11 are detachably connected via the first buckle 15; a second buckle 26 is provided on one side of the second hopper trough 22 close to the second hopper cover 21, and the second hopper cover 21 and the second hopper trough 22 are detachably connected via the second buckle 26, and the first buckle 15 and the second buckle 26 each include four groups of buckles, which lock the hopper cover and the hopper trough from four directions of the hopper cover to prevent the slurry from overflowing during the mixing process.

[0030] The first hopper cover 11 is provided with a feed port 112 , which is connected to an external pipeline, and active substances, conductive black carbon, dispersants, binders, additives and other components are added into the first stirring hopper 1 in a certain proportion and sequence through the feed port 112 .

[0031] The first hopper cover 11 is provided with a first handle 111, and the second hopper cover 21 is provided with a second handle 211. The first handle 111 is provided at the center of the first hopper cover 11 and is fixedly connected to the first hopper cover 11, and the second handle 211 is provided at the center of the second hopper cover 21 and is fixedly connected to the second hopper cover 21. The double-series dynamic stirring device provided in this embodiment also includes a first bracket 14 and a second bracket 24. The first bracket 14 is detachably connected to the first stirring hopper 1, and the second bracket 24 is detachably connected to the second stirring hopper 2. The first bracket 14 is used to support the first hopper trough 12 so that the bottom of the first hopper trough 12 is higher than the ground. The second bracket 24 is used to support the second hopper trough 22 so that the bottom of the second hopper trough 22 is higher than the ground. The provision of handles and brackets facilitates rapid assembly in a complex working environment and occupies a small area.

[0032] The double-series driving stirring device also includes a first power unit 13 and a second power unit 23. The first power unit 13 is detachably connected to the first hopper cover 11, and the second power unit 23 is detachably connected to the second hopper cover 21. The first power unit 13 and the second power unit 23 are both servo motors with the same specifications, so that the torque is dispersed in a high-speed direction. The same torque provides the torque of the double-series driving, and the quality of the stirring slurry is better. A first paddle 122 is provided in the first hopper trough 12, and the power shaft of the first power unit 13 passes through the first hopper cover 11 and is detachably connected to the first paddle 122. A second paddle 222 is provided in the second hopper trough 22, and the power shaft of the second power unit 23 passes through the second hopper cover 21 and is detachably connected to the second paddle 222. The first power unit 13 and the second power unit 23 are fixed to the outside of the hopper trough, and only the power shaft is connected to the rotating paddle to prevent the electrode from being contaminated by splashing slurry.

[0033] The first blade 122 and the second blade 222 both include a blade blade and a flat blade. The flat blade has multiple sets of rotary blades for grinding the mixture, and the blade blade is used to stir and mix the slurry deposited at the bottom of the tank with the upper slurry. The double-series stirring device can disperse at high speed and stir the slurry with good quality. At the same time, the stirring time is reduced from 6 hours per cycle to 3.5 hours, saving nearly half the time.

[0034] The first hopper trough 12 and the second hopper trough 22 are respectively provided with a first filter screen 121 and a second filter screen 221. In the vertical direction, the height of the first filter screen 121 is greater than the height of the series pipe 3, so that the preliminary mixed slurry after being filtered by the first filter screen 121 enters the second hopper trough 22 for further mixing; the height of the second filter screen 221 is less than the height of the series pipe 3, and the slurry entering the second hopper trough 22 from the series pipe 3 is further mixed and filtered through the second filter screen 221 after mixing. The height of the second filter screen 221 is greater than the height of the slurry outlet pipe 25, and the filtered slurry is output through the second filter screen 221. The mesh size of the first filter screen 121 and the second filter screen 221 can be specifically set by the user.

[0035] The working process of the double-series dynamic stirring device is as follows: the slurry introduced into the first stirring hopper 1 is stirred by the first power unit 13 driving the first blade 122, the stirred slurry is filtered through the first leakage screen 121, the filtered slurry enters the second stirring device 2 through the series pipe 3, the second power unit 23 drives the second blade 222 to stir the slurry, the slurry after the second stirring is passed into the second leakage screen 221 for screening, and then the stirred slurry is transported through the slurry outlet pipe, mixed together under the mechanical action of the blade paddle and the plane paddle, such as flipping, kneading, and shearing, to form a uniform and stable solid-liquid suspension system and then output. The double-series dynamic stirring device adopts a double star mechanism to improve the stability of the slurry particle size, smooth filterability, uniformity of active particles, and coating suitability.

[0036] Obviously, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0037] Note that in the description of this specification, the reference terms "some embodiments", "other embodiments", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A double-tandem stirring device, characterized in that: It includes a first stirring hopper, a second stirring hopper and a series pipeline connecting the first stirring hopper and the second stirring hopper; The first stirring hopper includes a first hopper cover and a first hopper trough connected to the first hopper cover, the second stirring hopper includes a second hopper cover and a second hopper trough connected to the second hopper cover, the height of the series pipe connected to the first hopper trough is greater than the height of the end connected to the second hopper trough, and a throttle valve is provided on the series pipe.

2. A double-tandem stirring device as claimed in claim 1, characterized in that: The double-tandem stirring device further comprises a first power unit and a second power unit, wherein the first power unit is detachably connected to the first hopper cover, and the second power unit is detachably connected to the second hopper cover.

3. A double-tandem stirring device as claimed in claim 2, characterized in that: The first hopper trough is provided with a first paddle, the second hopper trough is provided with a second paddle, the power shaft of the first power unit passes through the first hopper cover and is detachably connected to the first paddle, and the power shaft of the second power unit passes through the second hopper cover and is detachably connected to the second paddle.

4. A double-tandem stirring device as claimed in claim 3, characterized in that: The first blade and the second blade each include a blade blade and a plane blade.

5. A double-tandem stirring device as claimed in claim 1, characterized in that: The first hopper cover is also provided with a feed inlet, through which powder is fed into the first stirring hopper.

6. A double-tandem stirring device as claimed in claim 1, characterized in that: A slurry discharge pipe is provided on the side of the second hopper trough facing the ground.

7. A double-tandem stirring device as claimed in claim 6, characterized in that: The first hopper trough and the second hopper trough are respectively provided with a first leakage screen and a second leakage screen. In the vertical direction, the height of the first leakage screen is greater than the height of the series pipes, the height of the second leakage screen is less than the height of the series pipes, and the height of the second leakage screen is greater than the height of the slurry outlet pipe.

8. A double-tandem stirring device as claimed in claim 1, characterized in that: A first buckle is provided on a side of the first hopper trough close to the first hopper cover, and the first hopper trough and the first hopper cover are detachably connected via the first buckle; a second buckle is provided on a side of the second hopper trough close to the second hopper cover, and the second hopper cover and the second hopper trough are detachably connected via the second buckle.

9. A double-tandem stirring device as claimed in claim 1, characterized in that: The first hopper cover and the second hopper cover are respectively provided with a first handle and a second handle, and the first handle and the second handle are respectively provided at the center of the first hopper cover and the center of the second hopper cover.

10. A double-tandem stirring device as claimed in claim 1, characterized in that: The double-tandem dynamic stirring device further comprises a first bracket and a second bracket, wherein the first bracket is detachably connected to the first stirring hopper, and the second bracket is detachably connected to the second stirring hopper.

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