CN211069735U

CN211069735U - Agitating unit and battery thick liquids storage device

Info

Publication number: CN211069735U
Application number: CN201922028795.8U
Authority: CN
Inventors: 王瑞成; 朴成镇; 李根雨; 安奎明
Original assignee: Hunan Xinminya New Energy Technology Co Ltd; Sichuan Xinminya Battery Technology Co Ltd; Suzhou Lingwei New Energy Technology Co Ltd
Current assignee: Hunan Lingpai Energy Storage Technology Co ltd; Hunan Lingpai New Energy Research Institute Co ltd; Hunan Lingpai New Energy Technology Co Ltd; Hengyang Lingpai New Energy Technology Co Ltd; Hunan Lead Power Dazhi Technology Inc
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-07-24
Anticipated expiration: 2029-11-21

Abstract

The application provides a agitating unit and battery thick liquids storage device. The stirring device includes: the device comprises a transmission mechanism, a driving mechanism and a stirring mechanism; the transmission mechanism comprises a driving bevel gear, a first driven bevel gear and a second driven bevel gear, wherein the first driven bevel gear and the second driven bevel gear are matched with the driving bevel gear; the driving mechanism comprises a servo motor and a speed reducer, the servo motor is connected with the driving bevel gear to drive the first driven bevel gear and the second driven bevel gear to coaxially and reversely rotate; the speed reducer is used for controlling the power of the servo motor; the stirring mechanism comprises a first stirring shaft and a second stirring shaft which are concentric, a first stirring paddle connected with the first stirring shaft and a second stirring paddle connected with the second stirring shaft, the first stirring shaft is linked with a first driven bevel gear, and the second stirring shaft is linked with a second driven bevel gear. This application has effectively improved stirring efficiency, promotes the stability and the homogeneity of product, and then has also promoted stability and the uniformity between the product is criticized.

Description

Agitating unit and battery thick liquids storage device

Technical Field

The application relates to the field of lithium ion battery manufacturing equipment, in particular to a stirring device applied to a cache tank and a battery slurry storage device comprising the stirring device.

Background

With the influence of factors such as the shortage of traditional energy sources and the requirement of environmental protection, the application of lithium ion batteries is more and more extensive, especially in the field of electric automobiles, and the lithium ion batteries are in the trend of rapid development in the past several years. Therefore, the quality of the lithium ion battery is an important guarantee for the development of the electric automobile. The first ring in the production link of the lithium ion battery is also a key ring, namely the slurry preparation process, and the uniformity and consistency of slurry preparation directly influence the quality of subsequent lithium ion battery production and the performance of products thereof.

In the existing measures for improving the consistency of the lithium ion battery slurry, more improvement is concentrated on the lifting and transformation in the slurry preparation tank, and the improvement in the buffer tank and the transfer process after the slurry preparation is neglected. At present, a slurry cache tank is influenced by factors such as equipment volume, structure and power, a stirring paddle is singly used for rotating around a stirrer in the tank, and due to the characteristic of non-Newtonian fluid of the slurry, the slurry is easy to settle, agglomerate and the like on the peripheral wall of the tank body and the center of the tank. The stirring effect was poor and the slurry could not be sufficiently mixed. The consistency of the slurry between different batches is more difficult to ensure, which seriously affects the quality of the final battery product.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application will be solved is that current battery thick liquids are poor in stability and the homogeneity of buffer tank internal stirring effect, and the thick liquids uniformity between different batches is poor.

For solving above-mentioned technical problem, the application discloses a agitating unit is applied to in the battery thick liquids buffer memory jar, includes: the device comprises a transmission mechanism, a driving mechanism and a stirring mechanism; the transmission mechanism comprises a driving bevel gear, a first driven bevel gear and a second driven bevel gear, wherein the first driven bevel gear and the second driven bevel gear are matched with the driving bevel gear; the driving mechanism comprises a servo motor and a speed reducer, and the servo motor is connected with the driving bevel gear so as to drive the driving bevel gear to drive the first driven bevel gear and the second driven bevel gear to coaxially and reversely rotate; the speed reducer is used for controlling the power of the servo motor; the stirring mechanism comprises a first stirring shaft and a second stirring shaft which are concentric, a first stirring paddle connected with the first stirring shaft and a second stirring paddle connected with the second stirring shaft, the first stirring shaft is linked with the first driven bevel gear, and the second stirring shaft is linked with the second driven bevel gear.

Optionally, the stirring device further includes: a box body; and a driving bevel gear bearing assembly, a first driven bevel gear bearing assembly and a second driven bevel gear bearing assembly which are respectively mounted on the case and respectively support the driving bevel gear, the first driven bevel gear and the second driven bevel gear.

Optionally, each bearing assembly includes a bearing support, end caps and shaft seals respectively disposed at two ends of the bearing support, and a bearing disposed in the bearing support and connected to the bevel gear.

Optionally, the first driven bevel gear and the second driven bevel gear are the same in size and are arranged in parallel.

Optionally, the first stirring shaft is a solid shaft, the second stirring shaft is a hollow shaft, and the first stirring shaft penetrates through the second stirring shaft; the first driven bevel gear is sleeved on the first stirring shaft, and the second driven bevel gear is sleeved on the second stirring shaft.

Optionally, the first stirring shaft is a variable-diameter solid shaft, and the shaft diameter of the part of the first stirring shaft penetrating through the first driven bevel gear is matched with the inner diameter of the first driven bevel gear and is larger than the shaft diameter of the part of the first stirring shaft penetrating through the second stirring shaft.

Optionally, the first stirring paddle and the second stirring paddle rotate on the outer ring and the inner ring respectively.

Optionally, the first stirring paddle is an anchor type paddle, the second stirring paddle is a twisted frame type paddle, and the anchor type paddle is arranged on the outer side of the twisted frame type paddle; the stirring device further includes: and connecting the anchor type paddle to the anchor type paddle fixing sleeve of the first stirring shaft and connecting the twist frame type paddle to the twist frame type paddle fixing sleeve of the second stirring shaft.

Optionally, a central circular ring sleeve for the first stirring shaft to pass through is arranged at the bottom of the twist frame type paddle.

Optionally, the stirring device further includes: and the rotary sealing element and the rotary sealing support are arranged on the second stirring shaft.

The application also discloses battery thick liquids storage device includes: buffer tank and above-mentioned agitating unit.

Compared with the prior art, the technical scheme of the application has at least the following beneficial effects:

because a stirring effect of a stirring paddle is unsatisfactory in the traditional scheme, a plurality of buffer tanks consider to increase dispersion devices, and the manufacturing cost and the later-stage use energy consumption are increased. According to the technical scheme, the bevel gear combination is driven by the servo motor set, so that the two stirring paddles rotate coaxially, reversely and at a constant speed, the stirring efficiency is fully improved, and the energy consumption is saved; and two stirring paddles rotate in opposite directions, and the slurry stirred by the stirring paddles can form mutual reaction force, so that the slurry is fully collided and mixed, the stirring efficiency is effectively improved, the stability and the uniformity of the product are improved, and the stability and the consistency of the product in batches are further improved.

In the traditional scheme, a stirring paddle is used, the stirring process rotates along one direction, the effect of maintaining the stability of the slurry is achieved more, the slurry is non-Newtonian in fluid property, partial slurry is agglomerated and settled on the wall of the tank due to the action of centrifugal force or the action of vortex in the center of the tank, and the uniformity of the product is seriously influenced. This application technical scheme uses two oar combinations of coaxial counter-rotation, at the stirring in-process, has fully enlarged the stirring scope, and because rotation opposite direction, can form mutual reaction force, makes abundant collision mix between the thick liquids, effectively improves stirring efficiency, promotes the homogeneity of product.

In the specific embodiment, in a cache tank with a small volume, the combined joint work of the anchor type paddle and the twist frame type paddle is realized, the space is fully utilized, and the stirring range is enlarged; and because inner circle and outer lane thick liquids rotation direction are opposite, can form mutual reaction force, make abundant collision mix between the thick liquids, effectively improve stirring efficiency, promote the homogeneity of product.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of a stirring device according to an embodiment of the present application;

fig. 2 is a partially enlarged sectional structure diagram of a stirring device according to an embodiment of the present application.

The following is a supplementary description of the drawings:

11-drive bevel gear; 12-a first driven bevel gear; 13-a second driven bevel gear; 2-a drive mechanism; 31-a first stirring shaft; 32-second stirring shaft; 41-a first stirring paddle; 42-a second stirring paddle;

5-a box body; 110-drive bevel gear bearing assembly; 120-a first driven bevel gear bearing assembly; 130-a second driven bevel gear bearing assembly; 131-a bearing support; 132-an end cap; 133-shaft seal; 134-a bearing;

61-anchor type oar fixing sleeve; 62-twist frame type paddle fixing sleeve; 63-a central annular ring;

70-a seal assembly; 71-a rotary seal; 72-rotating seal carrier.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

This application technical scheme provides a be applied to low-speed agitating unit of battery thick liquids buffer tank, can guarantee thick liquids and in buffer memory and the abundant even mixture of transportation, realize the uniformity of different batches of products. The technical solution of the present invention will be described in detail with reference to the accompanying drawings and examples, wherein the stirring object of the stirring apparatus of the present invention is to perform low-speed stirring in a buffer tank after slurry preparation by analyzing the structure of the apparatus and considering the strength of the existing material. It should be noted that, the drawings do not show the screws, the pins and the parts thereof that are used for fixing or connecting conventionally, and those skilled in the art can understand that, according to the actual needs, the suitable fixing and matching parts and the like are selected and used.

Referring to fig. 1, the stirring apparatus according to the embodiment of the present application includes: the device comprises a transmission mechanism, a driving mechanism and a stirring mechanism; the transmission mechanism comprises a driving bevel gear 11, and a first driven bevel gear 12 and a second driven bevel gear 13 which are matched with the driving bevel gear 11; the driving mechanism 2 comprises a servo motor and a speed reducer, and the servo motor is connected with the driving bevel gear 11 to drive the first driven bevel gear 12 and the second driven bevel gear 13 to coaxially and reversely rotate; the speed reducer is used for controlling the power of the servo motor; the stirring mechanism comprises a first stirring shaft 31 and a second stirring shaft 32 which are concentric, a first stirring paddle 41 connected with the first stirring shaft 31 and a second stirring paddle 42 connected with the second stirring shaft 32, the first stirring shaft 31 is linked with the first driven bevel gear 12, and the second stirring shaft 32 is linked with the second driven bevel gear 13.

The transmission mechanism is a combination of three bevel gears, wherein a driving bevel gear 11 is connected and driven by the driving mechanism 2, and simultaneously drives the other two driven

bevel gears

12 and 13 to rotate reversely, so that coaxial reverse rotation of the two linked

stirring shafts

31 and 32 is realized. In this embodiment, the first driven bevel gear 12 and the second driven bevel gear 13 are identical in size (equal in size) and arranged in parallel, and the drive bevel gear 11 is vertically disposed between the first driven bevel gear 12 and the second driven bevel gear 13 and engaged with the first driven bevel gear 12 and the second driven bevel gear 13, respectively.

The driving mechanism 2 comprises a servo motor and a speed reducer, the servo motor drives the driving bevel gear 11, the speed reducer is connected with the servo motor and used for controlling the operation of the servo motor, and the servo motor and the speed reducer can be integrally installed into a whole. Calculating the stirring operation power related to the tank diameter, the slurry diameter, the blade width and the slurry viscosity, wherein the reference formula is as follows: power quasi-number of slurry density revolution to the power of 3 x and 5 x of slurry diameter. Then, the motor power is selected, and the calculated value considering the efficiency is larger than or equal to 1.5 times of the stirring operation power, so that a proper servo motor can be selected correspondingly.

Further, in order to enable the stirring mechanism of the stirring device to be stably placed in the buffer tank, the stirring device of this embodiment may further include: a box body 5; and a drive bevel gear bearing assembly 110, a first driven bevel gear bearing assembly 120, and a second driven bevel gear bearing assembly 130 respectively mounted on the case 5 and respectively supporting the drive bevel gear 11, the first driven bevel gear 12, and the second driven bevel gear 13.

The box body 5 is used for fixing and supporting other mechanisms and corresponding components, can be detached, and is convenient for mounting and replacing internal components. As shown in FIG. 1, the servo motor shaft passes through the box 5 and is connected with a drive bevel gear 11 in a bevel gear assembly to provide power. Two driven

bevel gears

12, 13 of equal size are arranged in parallel relatively on the same vertical line while being engaged with the drive bevel gear 11. In this way, during the rotation of the bevel gear 11, the two driven

bevel gears

12 and 13 rotate in opposite directions, and coaxial reverse rotation can be achieved.

A drive bevel gear bearing assembly 110 is installed at one side of the case 5 for supporting rotation and sealing of the servo motor and the drive bevel gear 11; a first driven bevel gear bearing assembly 120 and a second driven bevel gear bearing assembly 130 are respectively installed at the upper and lower sides of the case 5, the first driven bevel gear bearing assembly 120 is used for supporting the first driven bevel gear 12 and the first stirring shaft 31 linked therewith, and the second driven bevel gear bearing assembly 130 is used for supporting the second driven bevel gear 13 and the second stirring shaft 32 linked therewith

The structure composition of each bearing assembly is the same, all include respectively: bearing support, end cover, bearing and shaft seal. Taking the second driven bevel gear bearing assembly 130 as an example, please refer to fig. 2, which includes a bearing support 131, end caps 132 and shaft seals 133 respectively disposed at two ends (upper and lower ends are opposite in the figure) of the bearing support 131, and a bearing 134 disposed in the bearing support 131 and connected to the second driven bevel gear 13. For a higher height cache tank, the first stirring shaft 31 (solid shaft) can also be considered to add support, for example, adding another set of bearing assemblies.

Referring to fig. 1 and fig. 2, in the present embodiment, the first stirring shaft 31 is a solid shaft, the second stirring shaft 32 is a hollow shaft, and the first stirring shaft 31 passes through the second stirring shaft 32; the first driven bevel gear 12 is sleeved on the first stirring shaft 31, so that the first driven bevel gear 12 is fixed on the first stirring shaft (solid shaft) 31, and the first driven bevel gear 12 is linked with the first stirring shaft 31; the second driven bevel gear 13 is sleeved on the second stirring shaft 31, so that the second driven bevel gear 13 is fixed on the second stirring shaft (hollow shaft) 32, and the linkage of the second driven bevel gear 13 and the second stirring shaft 32 is realized.

Further, the first stirring shaft 31 is a variable diameter solid shaft, and the shaft diameter of the portion of the first stirring shaft 31 penetrating through the first driven bevel gear 12 is matched with the inner diameter of the first driven bevel gear 12 and is larger than the shaft diameter of the portion of the first stirring shaft 31 penetrating through the second stirring shaft 31.

As shown in fig. 2, in order to facilitate stable matching with the two driven

bevel gears

12 and 13 with the same size, the first stirring shaft 31 may be a stepped shaft (or a reducer shaft), the larger diameter of the shaft is equal to the outer diameter of the second stirring shaft 32, and the smaller diameter of the shaft passes through the second stirring shaft 32, so as to realize the concentric line of the two shafts. Since the two driven

bevel gears

12 and 13 have the same size and the corresponding matched shaft diameters need to be the same, the first stirring shaft 31 is a variable diameter solid shaft, the shaft diameter of the part of the first stirring shaft (i.e. the part of the first stirring shaft) 31, which is assembled with the first driven bevel gear 12 (i.e. penetrates through the first driven bevel gear 12), is the same as the outer diameter of the second stirring shaft (i.e. the hollow shaft) 32, the shaft diameter of the part of the second stirring shaft (i.e. the hollow shaft) 32, which penetrates through the second stirring shaft.

Further, the first stirring paddle 41 and the second stirring paddle 42 can be respectively rotated on the inner ring and the outer ring, for example, the first stirring shaft 31 drives the first stirring paddle 41 to rotate on the outer ring, and the second stirring shaft 32 drives the second stirring paddle 42 to rotate on the inner ring; or, the first stirring shaft 31 drives the first stirring paddle 41 to rotate in the inner ring, and the second stirring shaft 32 drives the second stirring paddle 42 to rotate in the outer ring.

Specifically, the first stirring shaft 31 and the second stirring shaft 32 can respectively drive two stirring paddles with different structural forms, so as to realize simultaneous stirring of the inner ring and the outer ring in the buffer tank. In this embodiment, the first stirring paddle 41 is an anchor paddle, the second stirring paddle 42 is a twisted frame paddle, and the anchor paddle is arranged outside the twisted frame paddle; the stirring device further includes: the anchor type paddles are connected to the anchor type paddle fixing sleeve 61 of the first stirring shaft 31 and the twist frame type paddle fixing sleeve 62 of the twist frame type paddle is connected to the second stirring shaft 32. As shown in fig. 1, the lower end of the first stirring shaft 31 is provided with an anchor type paddle 41 and a fixing sleeve 61 thereof, and the lower end of the second stirring shaft 32 is provided with a twist frame type paddle 42 and a fixing sleeve 62 thereof.

The two stirring shafts are used for driving the two stirring paddles to rotate respectively, so that the stirring range is fully expanded; and, a stirring rake rotates the stirring at the outer lane, and another stirring rake rotates the stirring at the inner lane, because inner circle and outer lane thick liquids rotation direction are opposite, can form mutual reaction force, make abundant collision mix between the thick liquids, effectively improved stirring efficiency, promoted the homogeneity of product.

Aiming at the design that the anchor type paddles are arranged on the outer side of the twist frame type paddles, a cross arm of the twist frame type paddles 42 is provided with a central through hole, and a horizontal wall (namely the bottom) of the twist frame type paddles 42 is further provided with a central circular ring sleeve 63, so that the first stirring shaft 31 can penetrate through the twist frame type paddles 42 to be connected with the anchor type paddles 41.

It should be noted that the structural forms of the first stirring paddle and the second stirring paddle are not limited to the anchor paddle and the twisted frame paddle, and those skilled in the art can understand that, on the premise of ensuring coaxial inversion and uniform stirring, different structural forms of the stirring paddle combination and the sealing combination can be selected according to requirements, for example, the first stirring paddle can also be selected from the frame stirring paddle, etc., and the second stirring paddle can also be selected from the blade stirring paddle, the screw stirring paddle, the turbine stirring paddle, etc., and the description is not further provided herein.

Referring to fig. 1 and fig. 2, in order to prevent slurry from leaking out of the hollow shaft and contaminating the stirring mechanism, the stirring device of the present embodiment may further include: a seal assembly 70 mounted to said second agitator shaft 32. The seal assembly 70 may specifically include a rotary seal 71 and a rotary seal carrier 72. As shown in the figure, the rotary seal 71 and the rotary seal support 72 are installed at the lower end of the second stirring shaft (hollow shaft) 32, and considering the rejection of the slurry to the foreign matters, the selected rotary seal assembly has the advantages of good dimensional stability, high pressure resistance, wear resistance, high temperature resistance, most of medium resistance, strong chemical resistance, small installation space, and no limitation of only using one set of seal. In the working process, the sealing ring is replaced regularly, and the perfect sealing performance is guaranteed.

Based on foretell agitating unit, this application embodiment still provides a battery thick liquids storage device, includes: buffer tank and above-mentioned agitating unit. During the practical application, agitating unit detachably installs on with buffer tank jar footpath assorted bung, and on the bung can be arranged in to box, actuating mechanism and drive mechanism, and agitating unit's (mixing) shaft passes the bung center, and in (mixing) shaft and stirring rake stretched into the buffer tank, reciprocating of the bung on the whole device accessible buffer tank of during operation realized agitating unit and buffer tank's deciliter.

The stirring device provided by the embodiment of the application uses one driving source to drive the bevel gear combination so as to drive two different stirring shafts to respectively drive the two stirring paddles to coaxially and reversely rotate, so that the space is fully utilized, the limitation of factors such as the volume and the power of a buffer tank is avoided, and the stirring process is more uniformly mixed; and, the selection and arrangement of the seal is fully considered, protecting the slurry from contamination.

In conclusion, upon reading the present detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure can be presented by way of example only, and not limitation. Those skilled in the art will appreciate that the present application is intended to cover various reasonable variations, adaptations, and modifications of the embodiments described herein, although not explicitly described herein. Such alterations, improvements, and modifications are intended to be suggested by this disclosure, and are within the spirit and scope of the exemplary embodiments of this disclosure.

Furthermore, certain terminology has been used in this application to describe embodiments of the disclosure. For example, "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present disclosure. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various portions of this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined as suitable in one or more embodiments of the disclosure.

It should be appreciated that in the foregoing description of embodiments of the disclosure, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of the subject disclosure. Alternatively, various features may be dispersed throughout several embodiments of the application. This is not to be taken as an admission that any of the features of the claims are essential, and it is fully possible for a person skilled in the art to extract some of them as separate embodiments when reading the present application. That is, embodiments in the present application may also be understood as an integration of multiple sub-embodiments. And each sub-embodiment described herein is equally applicable to less than all features of a single foregoing disclosed embodiment.

In some embodiments, numbers expressing quantities or properties used to describe and claim certain embodiments of the application are to be understood as being modified in certain instances by the term "about", "approximately" or "substantially". For example, "about," "approximately," or "substantially" can mean a ± 20% variation of the value it describes, unless otherwise specified. Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that may vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the embodiments of the application are approximations, the numerical values set forth in the specific examples are reported as precisely as possible.

Each patent, patent application, publication of a patent application, and other material, such as articles, books, descriptions, publications, documents, articles, and the like, cited herein is hereby incorporated by reference. All matters hithertofore set forth herein except as related to any prosecution history, may be inconsistent or conflicting with this document or any prosecution history which may have a limiting effect on the broadest scope of the claims. Now or later associated with this document. For example, if there is any inconsistency or conflict in the description, definition, and/or use of terms associated with any of the included materials with respect to the terms, descriptions, definitions, and/or uses associated with this document, the terms in this document are used.

Finally, it should be understood that the embodiments of the application disclosed herein are illustrative of the principles of the embodiments of the present application. Other modified embodiments are also within the scope of the present application. Accordingly, the disclosed embodiments are presented by way of example only, and not limitation. Those skilled in the art may implement the present application in alternative configurations according to the embodiments of the present application. Thus, embodiments of the present application are not limited to those embodiments described with accuracy in the application.

Claims

1. The utility model provides an agitating unit, is applied to in the battery thick liquids buffer memory jar, its characterized in that includes: the device comprises a transmission mechanism, a driving mechanism and a stirring mechanism; wherein the content of the first and second substances,

the transmission mechanism comprises a driving bevel gear, a first driven bevel gear and a second driven bevel gear, wherein the first driven bevel gear and the second driven bevel gear are matched with the driving bevel gear;

the driving mechanism comprises a servo motor and a speed reducer, and the servo motor is connected with the driving bevel gear so as to drive the driving bevel gear to drive the first driven bevel gear and the second driven bevel gear to coaxially and reversely rotate; the speed reducer is used for controlling the power of the servo motor;

the stirring mechanism comprises a first stirring shaft and a second stirring shaft which are concentric, a first stirring paddle connected with the first stirring shaft and a second stirring paddle connected with the second stirring shaft, the first stirring shaft is linked with the first driven bevel gear, and the second stirring shaft is linked with the second driven bevel gear.

2. The mixing device of claim 1, further comprising: a box body; and a driving bevel gear bearing assembly, a first driven bevel gear bearing assembly and a second driven bevel gear bearing assembly which are respectively mounted on the case and respectively support the driving bevel gear, the first driven bevel gear and the second driven bevel gear.

3. The mixing apparatus of claim 2, wherein each bearing assembly comprises a bearing support, an end cap and a shaft seal disposed at each end of the bearing support, and a bearing disposed in the bearing support and coupled to the bevel gear.

4. The stirring device of claim 1, wherein said first and second driven bevel gears are the same size and are arranged in parallel.

5. The mixing device of claim 1, wherein said first mixing shaft is a solid shaft and said second mixing shaft is a hollow shaft, said first mixing shaft passing through said second mixing shaft; the first driven bevel gear is sleeved on the first stirring shaft, and the second driven bevel gear is sleeved on the second stirring shaft.

6. The stirring device according to claim 5, wherein the first stirring shaft is a variable diameter solid shaft, and the diameter of the first stirring shaft passing through the first driven bevel gear is matched with the inner diameter of the first driven bevel gear and is larger than the diameter of the first stirring shaft passing through the second stirring shaft.

7. The mixing device of claim 1, wherein the first and second paddles rotate in outer and inner races, respectively.

8. The mixing device of claim 7, wherein said first mixing paddle is an anchor paddle and said second mixing paddle is a twist frame paddle, said anchor paddle being disposed outside of said twist frame paddle; the stirring device further includes: and connecting the anchor type paddle to the anchor type paddle fixing sleeve of the first stirring shaft and connecting the twist frame type paddle to the twist frame type paddle fixing sleeve of the second stirring shaft.

9. The stirring device of claim 8, wherein the bottom of the twist frame type paddle is provided with a central annular sleeve through which the first stirring shaft passes.

10. The mixing device of claim 1, further comprising: and the rotary sealing element and the rotary sealing support are arranged on the second stirring shaft.

11. A battery paste storage device, comprising: a buffer tank and a stirring device according to any one of claims 1 to 10.