CN117983507A

CN117983507A - Slurry conveying device, battery coating line and slurry conveying method

Info

Publication number: CN117983507A
Application number: CN202410405805.8A
Authority: CN
Inventors: 倾亚龙; 陈威; 彭鹏; 郑远添; 车欢
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-04-07
Filing date: 2024-04-07
Publication date: 2024-05-07

Abstract

The application discloses a slurry conveying device, a battery coating line and a slurry conveying method, wherein the slurry conveying device comprises a main pipeline; the bypass pipeline is connected with the main pipeline; one end of the discharging pipeline is connected with one end of the main pipeline, and the other end of the discharging pipeline is used for outputting slurry; the slurry conveying device is provided with a slurry conveying state and a slurry circulating state, wherein the main pipeline and the bypass pipeline are not communicated in the slurry conveying state, the main pipeline and the discharge pipeline are communicated so as to convey slurry conveyed from the feeding pipeline, the main pipeline and the discharge pipeline are not communicated in the slurry circulating state, and the main pipeline and the bypass pipeline are communicated and form a circulating loop for supplying slurry to circulate. The slurry conveying device, the battery coating line and the slurry conveying method can reduce the manufacturing cost of the battery.

Description

Slurry conveying device, battery coating line and slurry conveying method

Technical Field

The application relates to the technical field of battery manufacturing, in particular to a slurry conveying device, a battery coating line and a slurry conveying method.

Background

New energy batteries are increasingly used in life and industry, for example, new energy automobiles having a battery mounted therein have been widely used, and in addition, batteries are increasingly used in the field of energy storage and the like.

With the development of battery manufacturing technology, how to reduce the manufacturing cost of batteries is one of the subjects of research required in the industry.

Disclosure of Invention

In order to solve the technical problems, the application provides a slurry conveying device, a battery coating line and a slurry conveying method, which can reduce the manufacturing cost of a battery.

The application is realized by the following technical scheme.

A first aspect of the present application provides a slurry transporting apparatus, comprising: a main pipeline; a bypass line connected to the main line; one end of the discharging pipeline is connected to one end of the main pipeline, and the other end of the discharging pipeline is used for outputting slurry; the slurry conveying device is provided with a slurry conveying state and a slurry circulating state, wherein in the slurry conveying state, the main pipeline is not communicated with the bypass pipeline, the main pipeline is communicated with the discharge pipeline so as to convey slurry conveyed from the feeding pipeline, and in the slurry circulating state, the main pipeline is not communicated with the discharge pipeline, and the main pipeline is communicated with the bypass pipeline so as to form a circulating loop for circulating and flowing the slurry; the main pipeline comprises a first main channel and a second main channel, the first main channel is provided with a first channel port and a second channel port, the second main channel is provided with a third channel port and a fourth channel port, the first channel port of the first main channel and the third channel port of the second main channel are respectively connected with the feeding pipeline, the second channel port of the first main channel and the fourth channel port of the second main channel are respectively connected with the discharging pipeline, a first valve is arranged between the first main channel and the second main channel, and the first valve is used for enabling the first main channel and the second main channel to be mutually communicated or be mutually non-communicated.

When the slurry is required to be conveyed, the slurry conveying device is in a slurry conveying state, the main pipeline is not communicated with the bypass pipeline, and the main pipeline is communicated with the discharge pipeline and conveys the slurry conveyed from the feeding pipeline; after the slurry conveying is finished, the slurry conveying device is in a slurry circulation state, the main pipeline is not communicated with the discharging pipeline, the main pipeline is communicated with the bypass pipeline to form a circulation loop, residual slurry in the main pipeline circularly flows in the circulation loop, so that the slurry in the main pipeline is in a flowing state, the probability of gel due to standing can be reduced, the operation frequency of gel removal is reduced, the use cost of the slurry conveying device can be reduced, and the flowing direction of the slurry can be changed by changing the communication state of the main pipeline, the bypass pipeline and the discharging pipeline, so that the circulating flow of the residual slurry is realized.

The specific structure of the main pipeline can enable the main pipeline to form a conveying pipeline when being communicated with the discharging pipeline, and form a circulating loop when the main pipeline is communicated with the bypass pipeline, so that switching between the conveying pipeline and the circulating loop is realized. Moreover, the slurry conveying device is simple in structure and low in manufacturing cost, slurry in the main pipeline is in a flowing state, the probability of gel due to standing can be reduced, the operation times for removing the gel are reduced, and therefore the use cost of the slurry conveying device can be reduced, namely, the use cost and the manufacturing cost of the slurry conveying device are both reduced, and the manufacturing cost of a battery is reduced.

In some embodiments, the main conduit includes a tube body and a divider plate disposed within the tube body, the divider plate dividing a channel within the tube body into the first main channel and the second main channel, the first valve disposed at the divider plate.

The channel in the pipe body is divided into the first main channel and the second main channel by the partition plate, so that the number of pipelines is reduced, the cost is saved, the structure is compact, the occupied space is small, the first valve is arranged on the partition plate, the first main channel and the second main channel can be switched between the communicating state and the non-communicating state by opening and closing the first valve, the structure is simple, and the switching operation is simple.

In some embodiments, the slurry delivery device further comprises a connector connected to the main line, the discharge line, and the bypass line, respectively.

The setting of connecting piece has realized interconnect between main pipeline, ejection of compact pipeline and the bypass pipeline for main pipeline can form the conveying pipeline with ejection of compact pipeline intercommunication. Moreover, the slurry conveying device is simple in structure and low in manufacturing cost, slurry in the main pipeline is in a flowing state, the probability of gel due to standing can be reduced, and the operation times for removing the gel are reduced, so that the use cost of the slurry conveying device can be reduced, namely, the use cost and the manufacturing cost of the slurry conveying device are both reduced, and the manufacturing cost of a battery is reduced.

In some embodiments, the connector has a first port connected to the second port of the first main channel, a second port connected to the fourth port of the second main channel, a third port connected to both ends of the bypass line, a fourth port connected to both ends of the bypass line, and a fifth port connected to the discharge line.

In this way, the first main channel, the second main channel, the discharging pipeline and the bypass pipeline are mutually connected, so that the first main channel and the second main channel can be communicated with the discharging pipeline to form a conveying pipeline or communicated with the bypass pipeline to form a circulating loop, and the switching of the conveying pipeline and the circulating loop is realized. Moreover, the slurry conveying device is simple in structure and low in manufacturing cost, slurry in the main pipeline is in a flowing state, the probability of gel due to standing can be reduced, the operation times for removing the gel are reduced, and therefore the use cost of the slurry conveying device can be reduced, namely, the use cost and the manufacturing cost of the slurry conveying device are both reduced, and the manufacturing cost of a battery is reduced.

In some embodiments, the first port is in communication with the third port and the fifth port, the second port is in communication with the fourth port and the fifth port, the first port and the second port are not in communication, and the third port and the fourth port are not in communication.

Therefore, the first main channel and the second main channel can be respectively communicated with the discharging pipeline to form a conveying pipeline or respectively communicated with two ends of the bypass pipeline to form a circulating loop through limiting the communication state among the ports of the connecting piece, so that the switching between the conveying pipeline and the circulating loop is realized. Moreover, the slurry conveying device is simple in structure and low in manufacturing cost, slurry in the main pipeline is in a flowing state, the probability of gel due to standing can be reduced, the operation times for removing the gel are reduced, and therefore the use cost of the slurry conveying device can be reduced, namely, the use cost and the manufacturing cost of the slurry conveying device are both reduced, and the manufacturing cost of a battery is reduced.

In some embodiments, the first port and the second port are disposed at the same end of the connector.

Therefore, the first port and the second port can be respectively and directly connected with the first main channel and the second main channel which are positioned in the same pipe body, the connecting structure is simplified, and the manufacturing cost is further reduced.

In some embodiments, a through hole is formed at an end of the partition plate remote from the connection member, the first valve is mounted to the through hole, the first valve is adjusted to a closed state such that the first main passage and the second main passage are not communicated with each other in the slurry transporting state, and the first valve is adjusted to an open state such that the first main passage and the second main passage are communicated with each other in the slurry circulating state.

The first valve adjusts the state in which the first main passage and the second main passage are in communication with each other or not in communication with each other by opening or closing, and performs switching of the conveying line and the circulation circuit. The first valve is arranged at one end of the partition plate far away from the connecting piece, so that the flowing distance of the slurry in the first main channel and the second main channel is far, the slurry is in a quicker flowing state as much as possible, and the probability of gel is better reduced.

In some embodiments, the slurry delivery device further comprises a second valve mounted to an end of the discharge line adjacent to the main line, the second valve being adjusted to an open state in the slurry delivery state so that the discharge line and the main line are in communication, and to a closed state in the slurry circulation state so that the discharge line and the main line are not in communication.

Through the setting of the second valve, the main pipeline and the discharging pipeline are communicated or non-communicated, so that the main pipeline can be communicated with the discharging pipeline to form a conveying pipeline or communicated with the bypass pipeline to form a circulating loop, and the switching of the conveying pipeline and the circulating loop is realized. Moreover, the slurry conveying device is simple in structure and low in manufacturing cost, slurry in the main pipeline is in a flowing state, the probability of gel due to standing can be reduced, and the operation times for removing the gel are reduced, so that the use cost of the slurry conveying device can be reduced, namely, the use cost and the manufacturing cost of the slurry conveying device are both reduced, and the manufacturing cost of a battery is reduced.

In some embodiments, one end of the discharging pipeline far away from the main pipeline stretches into the slurry tank, and in the slurry conveying state, the slurry conveyed from the feeding pipeline sequentially passes through the main pipeline and the discharging pipeline to enter the slurry tank.

And (3) conveying the slurry into a slurry tank for coating operation of the pole piece coating device.

In some embodiments, the feeding pipeline is connected with a first pump, and in the slurry conveying state, the first pump drives slurry to flow in the main pipeline and the discharging pipeline; the bypass pipeline is connected with a second pump, and in the slurry circulation state, the second pump drives the slurry in the circulation loop to circulate in the circulation loop.

The first pump provides power for the transportation of the slurry, the second pump provides power for the circulation flow of the slurry in a circulation loop, the flow of the slurry in two states is realized, the probability of gel due to standing can be reduced, the operation times of gel removal are reduced, and therefore the use cost of the slurry transportation device can be reduced.

In some embodiments, the outfeed line extends in a vertical direction.

The discharge pipeline is arranged to extend along the vertical direction, so that slurry in the discharge pipeline flows downwards under the action of gravity, the energy of the first pump is saved, and in addition, the slurry in the discharge pipeline is not easy to settle on the inner wall of the discharge pipeline when in a slurry circulation state, so that the probability of gel is reduced.

A second aspect of the present application provides a battery coating line comprising: the slurry preparation device is used for preparing slurry; the slurry conveying device; the pole piece coating device is used for coating the slurry on the current collector to form a pole piece; the slurry conveying device is used for conveying the slurry prepared by the slurry preparation device to the pole piece coating device.

Since the battery coating line includes the slurry transporting device, the battery coating line includes all the advantageous effects of the slurry transporting device, the use cost and the manufacturing cost of the battery coating line are reduced, thereby reducing the manufacturing cost of the battery.

A third aspect of the present application provides a slurry conveying method, using a slurry conveying device, where the slurry conveying device includes a main pipeline, a bypass pipeline and a discharge pipeline, the bypass pipeline is connected to the main pipeline, one end of the discharge pipeline is connected to one end of the main pipeline, and the other end of the discharge pipeline is used for outputting slurry;

the slurry conveying method comprises the following steps:

a slurry conveying step of enabling the main pipeline and the bypass pipeline to be non-communicated, enabling the main pipeline and the discharge pipeline to be communicated, and conveying slurry conveyed from the feeding pipeline;

A slurry circulation step of causing the main pipeline and the discharge pipeline to be non-communicated, and causing the main pipeline and the bypass pipeline to be communicated and form a circulation loop, causing slurry to circulate in the circulation loop,

The slurry circulation step is performed in a state where the slurry transport step is stopped;

The main pipeline comprises a first main channel and a second main channel, the first main channel is provided with a first channel port and a second channel port, the second main channel is provided with a third channel port and a fourth channel port, the first channel port of the first main channel and the third channel port of the second main channel are respectively connected with the feeding pipeline, the second channel port of the first main channel and the fourth channel port of the second main channel are respectively connected with the discharging pipeline, a first valve is arranged between the first main channel and the second main channel, and the first valve is used for enabling the first main channel and the second main channel to be communicated with each other or not communicated with each other;

The slurry conveying step comprises the following steps:

a delivery route communicating step of communicating the first main passage and the second main passage with the discharge pipe, respectively, both the first main passage and the second main passage being non-communicated with the bypass pipe, and the first main passage and the second main passage being non-communicated with each other through the first valve;

Driving slurry conveying step to divide the slurry conveyed from the feeding pipeline into two paths and enabling the slurry to enter the discharging pipeline through the first main channel and the second main channel respectively;

The slurry circulation step includes:

A circulation route communication step of communicating the first main passage and the second main passage with the bypass pipe, respectively, both the first main passage and the second main passage being non-communicated with the discharge pipe, and communicating the first main passage and the second main passage with each other through the first valve;

and driving slurry circulation step to circulate the slurry in the first main channel and the second main channel through the first main channel, the second main channel and the bypass pipeline.

The method comprises the steps of switching a route firstly, enabling a main pipeline to be communicated with a discharging pipeline to form a conveying pipeline or to be communicated with a bypass pipeline to form a circulating loop, so that the conveying pipeline and the circulating loop are switched, enabling slurry to flow in the pipelines respectively to realize the conveying or circulating flow of the slurry, enabling the slurry in the main pipeline to be in a flowing state, reducing the probability of gel due to standing, reducing the operation frequency of gel removal, and therefore reducing the use cost of the slurry conveying device.

In some embodiments, the slurry delivery device further comprises a second valve mounted to an end of the discharge line proximate the main line;

In the conveying route communicating step, the second valve is adjusted to an open state so that the first main passage and the second main passage are respectively communicated with the discharge pipe,

In the circulation route communication step, the second valve is adjusted to a closed state so that both the first main passage and the second main passage are not communicated with the discharge pipe.

The main pipeline and the discharging pipeline are communicated or non-communicated through the adjustment of the second valve, so that the main pipeline can be communicated with the discharging pipeline to form a conveying pipeline or communicated with the bypass pipeline to form a circulating loop, and the switching of the conveying pipeline and the circulating loop is realized.

In some embodiments, the feed conduit is connected to a first pump and the bypass conduit is connected to a second pump;

in the step of driving the slurry to be conveyed, the first pump is started to drive the slurry conveyed from the feeding pipeline to be divided into two paths and enter the discharging pipeline through the first main channel and the second main channel respectively;

In the step of driving the slurry circulation, the second pump is started, and the slurry in the first main channel and the second main channel is driven to circulate through the first main channel, the second main channel and the bypass pipeline.

The first pump drives the slurry to flow in the conveying pipeline, the second pump drives the slurry to circularly flow in the circulating loop, and the slurry flows in two states, so that the probability of gel due to standing is reduced, the operation times of gel removal are reduced, the use cost of the slurry conveying device can be reduced, the structure of the slurry conveying device is simple, the manufacturing cost is low, namely, the use cost and the manufacturing cost of the slurry conveying device are both reduced, and the manufacturing cost of a battery is reduced.

Effects of the invention

The application provides a slurry conveying device, a battery coating line and a slurry conveying method, which can reduce the manufacturing cost of a battery.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

FIG. 1 is a schematic illustration of one construction of a slurry delivery device provided in accordance with some embodiments of the present application;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is a top view of the internal structure of a main conduit provided in some embodiments of the present application;

FIG. 4 is a side view of a main conduit provided by some embodiments of the present application;

FIG. 5 is a schematic view of another construction of a slurry delivery device provided in accordance with some embodiments of the present application;

FIG. 6 is a schematic view of a battery coating line according to some embodiments of the present application;

FIG. 7 is a flow chart of a slurry delivery method provided by some embodiments of the present application;

fig. 8 is another flow chart of a slurry delivery method provided by some embodiments of the application.

Description of the reference numerals

10. A slurry conveying device; 20. a slurry preparation device; 30. a pole piece coating device;

1. A main pipeline; 11. a first main channel; 111. a first passage port; 112. a second port; 12. a second main channel; 121. a third port; 122. a fourth port; 13. a tube body; 14. a partition plate; 2. a bypass line; 3. a discharge pipeline; 4. a feeding pipeline; 51. a first valve; 52. a second valve; 53. a third valve; 54. a fourth valve; 55. a fifth valve; 6. a connecting piece; 61. a first port; 62. a second port; 63. a third port; 64. a fourth port; 65. a fifth port; 7. a slurry tank; 81. a first pump; 82. and a second pump.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, 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 application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and in the description of the drawings above are intended to cover non-exclusive inclusions.

In the description of embodiments of the present application, the technical terms "first," "second," "third," etc. are used merely to distinguish between different objects and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this context, the character "/" generally indicates that the associated object is an "or" relationship.

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc. are orientation or positional relationship based on the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, and are not intended to indicate or imply that the apparatus or element in question must have a specific orientation, be constructed, operated, or used in a specific orientation, and thus should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the term "contact" is to be understood in a broad sense as either direct contact or contact across an intermediate layer, as either contact with substantially no interaction force between the two in contact or contact with interaction force between the two in contact.

The present application will be described in detail below.

At present, new energy batteries are increasingly widely applied to life and industry. The new energy battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and a plurality of fields such as aerospace. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

In the embodiment of the application, the battery can be a single battery.

The battery cell may be a secondary battery, which means a battery cell that can be continuously used by activating an active material in a charging manner after the battery cell is discharged.

The battery cell includes an electrode assembly. The electrode assembly includes a positive electrode tab, a negative electrode tab, and a separator. In the process of charging and discharging the battery cell, active ions (such as lithium ions) are inserted and separated back and forth between the positive pole piece and the negative pole piece. The isolating piece is arranged between the positive pole piece and the negative pole piece, can play a role in preventing the positive pole piece and the negative pole piece from being short-circuited, and can enable active ions to pass through.

The preparation steps of the positive pole piece and the negative pole piece comprise: active materials (e.g., oxides, graphite, etc.) of the positive and negative electrodes are dispersed in a solvent by a slurry preparation apparatus to form a slurry. These slurries typically contain active materials, conductive agents, binders, and the like; the prepared electrode paste is then coated onto a current collector (e.g., aluminum foil or copper foil) by a coating apparatus.

In the preparation step, the slurry prepared by the slurry preparation device needs to be conveyed to the coating device by the slurry conveying device so as to be used for coating by the coating device, thereby completing the preparation process of the pole piece of the battery. The slurry of the battery is prepared by mixing and stirring a solvent, an active substance, a conductive agent, an adhesive, a thickening agent and other additives according to a certain proportion to form a solid-liquid mixture, and once the slurry stops moving in the process of conveying the slurry through a slurry conveying device, the slurry is easy to gel due to sedimentation.

The inventor of the present application notes that the existing slurry conveying device mostly adopts a mode of removing residual slurry in a pipeline to reduce the probability of the slurry gel in the pipeline, so as to facilitate the next normal use of the slurry conveying device. For example, a cleaning mode of residues is to use a pushing ball connected with a scraping blade to move in a pipeline, the scraping blade scrapes residual slurry in the pipeline in the process of moving the pushing ball in the pipeline, so as to clean the pipeline. Accordingly, the inventors of the present application have noted that the production cost of the battery can be greatly reduced by reducing the manufacturing cost and the use cost of the slurry transporting device.

The inventor of the application has found through research that, instead of a way of removing residual slurry, a way of circularly flowing the residual slurry is adopted, so that the residual slurry is in a flowing state, the probability of gel of the slurry in a pipeline can be well reduced, the operation frequency of gel removal is reduced, and therefore, the use cost of the slurry conveying device can be reduced.

Based on such design concept, the inventor of the present application devised a slurry transporting apparatus including a main pipe, a bypass pipe, and a discharge pipe, the bypass pipe being connected to the main pipe, one end of the discharge pipe being connected to one end of the main pipe, the other end being used for outputting slurry, the slurry transporting apparatus having a slurry transporting state in which the main pipe and the bypass pipe are not communicated, and a slurry circulating state in which the main pipe and the discharge pipe are communicated to transport slurry transported from the feed pipe, and the main pipe and the discharge pipe are not communicated, the main pipe and the bypass pipe being communicated and forming a circulating loop in which the slurry circulates.

When the slurry is required to be conveyed, the slurry conveying device is in a slurry conveying state, the main pipeline is not communicated with the bypass pipeline, and the main pipeline is communicated with the discharge pipeline and conveys the slurry conveyed from the feeding pipeline; after the slurry conveying is finished, the slurry conveying device is in a slurry circulation state, the main pipeline is not communicated with the discharging pipeline, the main pipeline is communicated with the bypass pipeline to form a circulation loop, residual slurry in the slurry conveying device circularly flows in the circulation loop, so that the slurry in the main pipeline is in a flowing state, the probability of gel due to standing can be reduced, the operation frequency of gel removal is reduced, the use cost of the slurry conveying device can be reduced, and the flowing direction of the slurry can be changed by changing the communication state of the main pipeline, the bypass pipeline and the discharging pipeline to realize the circulating flow of the residual slurry.

The slurry conveying device provided by the embodiment of the application can be used in the battery production process, for example, can be used for conveying battery slurry to a pole piece coating device, and the like, and of course, a person skilled in the art can understand that the slurry conveying device provided by the embodiment of the application is not only used for conveying slurry in the battery production manufacturing process, but also can be used for conveying other slurry which is required to be conveyed and is easy to be settled.

Some embodiments of the present application are described in detail below with reference to fig. 1 to 8.

FIG. 1 is a schematic illustration of one construction of a slurry delivery device provided in accordance with some embodiments of the present application; FIG. 2 is an enlarged view of FIG. 1 at A; FIG. 3 is a top view of the internal structure of a main conduit provided in some embodiments of the present application; FIG. 4 is a side view of a main conduit provided by some embodiments of the present application; fig. 5 is a schematic view of another structure of a slurry transporting apparatus according to some embodiments of the present application.

As shown in fig. 1, a first aspect of the present application provides a slurry conveying device 10, which includes a main pipeline 1, a bypass pipeline 2 and a discharge pipeline 3, wherein the bypass pipeline 2 is connected to the main pipeline 1; one end of the discharging pipeline 3 is connected with one end of the main pipeline 1, and the other end of the discharging pipeline is used for outputting slurry; the slurry transporting device 10 has a slurry transporting state in which the main pipe 1 and the bypass pipe 2 are not in communication, and the main pipe 1 and the discharge pipe 3 are in communication to transport the slurry transported from the feed pipe 4, and a slurry circulating state in which the main pipe 1 and the discharge pipe 3 are not in communication, and the main pipe 1 and the bypass pipe 2 are in communication and form a circulation loop in which the slurry is circulated.

By "communicating" is meant that the internal passages of two connected conduits are in communication and can provide a pathway for slurry flow. By "non-communicating" is meant that there is a barrier in the interior passage of at least one of the two connected conduits or a barrier at the junction of the two passages such that the two connected conduits form a conduit set that is not open to the passage of slurry flow, i.e. does not allow slurry to flow through. Therefore, in the slurry transporting state, the main pipe 1 and the bypass pipe 2 are not communicated, the pipe group formed by the main pipe 1 and the bypass pipe 2 does not allow the slurry to flow therethrough, and the pipe group formed by the main pipe 1 and the discharge pipe 3 (hereinafter referred to as a transporting pipe) allows the slurry to flow therethrough, and therefore, the slurry entering from the end of the main pipe 1 remote from the discharge pipe 3 can flow through the main pipe 1 and the discharge pipe 3 in order, thereby transporting the slurry. In the slurry circulation state, the main pipe 1 and the discharge pipe 3 are not communicated, the pipe group formed by the main pipe 1 and the discharge pipe 3 does not allow slurry to flow therethrough, the main pipe 1 and the bypass pipe 2 are communicated, and the pipe group (circulation loop) formed by the main pipe 1 and the bypass pipe 2 allows slurry to flow therethrough, that is, the slurry can circulate in the circulation loop.

When the slurry is required to be conveyed, the slurry conveying device is in a slurry conveying state, the main pipeline 1 is not communicated with the bypass pipeline 2, the main pipeline 1 is communicated with the discharge pipeline 3, and the slurry conveyed from the feeding pipeline 4 is conveyed; after the slurry is conveyed, the slurry conveying device 10 is in a slurry circulation state, the main pipeline 1 and the discharge pipeline 3 are not communicated, the main pipeline 1 and the bypass pipeline 2 are communicated and form a circulation loop, residual slurry in the slurry conveying device 10 circularly flows in the circulation loop, so that the slurry in the main pipeline is in a flowing state, the probability of gel due to standing can be reduced, the operation frequency of gel removal is reduced, the use cost of the slurry conveying device 10 can be reduced, and the flowing direction of the slurry can be changed by changing the communication state of the main pipeline 1, the bypass pipeline 2 and the discharge pipeline 3, so that the circulating flow of the residual slurry is realized.

In some embodiments of the application, the main conduit 1 comprises a first main channel 11 and a second main channel 12, the first main channel 11 having a first channel opening 111 and a second channel opening 112, the second main channel 12 having a third channel opening 121 and a fourth channel opening 122, the first channel opening 111 of the first main channel 11 and the third channel opening 121 of the second main channel 12 being connected to the inlet conduit 4, respectively, the second channel opening 112 of the first main channel 11 and the fourth channel opening 122 of the second main channel 12 being connected to the outlet conduit 3, respectively, a first valve 51 being arranged between the first main channel 11 and the second main channel 12, the first valve 51 being adapted to allow the first main channel 11 and the second main channel 12 to communicate with each other or to non-communicate with each other.

By "in communication with each other" is meant that the junction of the two channels is in communication, meaning that slurry in one channel can enter the other channel through the junction of the two. By "non-communicating with each other" is meant that the junction of the two channels is blocked, and that the two channels are not communicating with each other and are isolated from each other, it is meant that the slurry in each channel cannot enter the other channel. When the first main passage 11 and the second main passage 12 communicate with each other, the slurry in the first main passage 11 may enter the second main passage 12, and/or the slurry in the second main passage 12 may enter the first main passage 11. When the first main channel 11 and the second main channel 12 are not communicated with each other, the first main channel 11 and the second main channel 12 are isolated from each other, and the slurry in the first main channel 11 cannot enter the second main channel 12, and the slurry in the second main channel 12 cannot enter the first main channel 11.

The first main channel 11 and the second main channel 12 are not communicated with each other through the first valve 51, the slurry input from the feeding pipeline 4 is divided into two paths, and the two paths of slurry respectively enter the discharging pipeline 3 through the first main channel 11 and the second main channel 12 to convey the slurry; by the first valve 51 making the first main passage 11 and the second main passage 12 communicate with each other, the first main passage 11 and the second main passage 12 can be made to form a circulation circuit with the bypass line 2 for circulating the residual slurry.

The first main passage 11 and the second main passage 12 of the main pipe 1 may be provided in two pipes, respectively, or may be provided in the same pipe.

In this way, the main pipeline 1 and the discharging pipeline 3 are communicated to form a conveying pipeline, and the main pipeline 1 and the bypass pipeline 2 are communicated to form a circulating loop, so that switching between the conveying pipeline and the circulating loop is realized. Moreover, the slurry conveying device 10 has a simple structure and low manufacturing cost, and the slurry in the main pipeline 1 is in a flowing state, so that the probability of gel due to standing can be reduced, and the operation frequency of gel removal is reduced, thereby reducing the use cost of the slurry conveying device 10, namely, the use cost and the manufacturing cost of the slurry conveying device 10 are reduced, and the manufacturing cost of a battery is reduced.

In some embodiments of the present application, as shown in fig. 1, 3 and 4, the main pipe 1 includes a pipe body 13 and a partition plate 14 provided in the pipe body 13, the partition plate 14 dividing a passage in the pipe body 13 into a first main passage 11 and a second main passage 12, and a first valve 51 is provided in the partition plate 14.

The use of the partition plate 14 to partition the channel in the pipe body 13 into the first main channel 11 and the second main channel 12 reduces the number of pipes, saves cost, makes the structure compact and occupies small space, and the first valve 51 is provided in the partition plate 14, and the state of the first main channel 11 and the second main channel 12 communicating with each other and not communicating with each other can be switched by opening and closing the first valve 51, so that the structure is simple and the switching operation is simple.

In some embodiments of the application, the slurry transporting device 10 further comprises a connecting piece 6, the connecting piece 6 being connected to the main line 1, the discharge line 3 and the bypass line 2, respectively.

The connection piece 6 is arranged to realize the interconnection among the main pipeline 1, the discharging pipeline 3 and the bypass pipeline 2, so that the main pipeline 1 can be communicated with the discharging pipeline 3 to form a conveying pipeline or communicated with the bypass pipeline 2 to form a circulating loop. Moreover, the slurry conveying device 10 has a simple structure and low manufacturing cost, and the slurry in the main pipeline 1 is in a flowing state, so that the probability of gel due to standing can be reduced, and the operation frequency of gel removal is reduced, thereby reducing the use cost of the slurry conveying device 10, namely, the use cost and the manufacturing cost of the slurry conveying device 10 are reduced, and the manufacturing cost of a battery is reduced.

In some embodiments of the present application, as shown in fig. 2, the connecting member 6 has a first port 61, a second port 62, a third port 63, a fourth port 64, and a fifth port 65, the first port 61 being connected to the second port 112 of the first main passage 11, the second port 62 being connected to the fourth port 122 of the second main passage 12, the third port 63 and the fourth port 64 being connected to both ends of the bypass line, and the fifth port 65 being connected to the discharge line, respectively.

The connecting member 6 may be a connecting structure for connecting only the first main passage 11, the second main passage 12, the discharge pipe 3 and the bypass pipe 2, or may be a valve capable of connecting or adjusting the communication state and the non-communication state between the ports.

In this way, an interconnection between the first main channel 11, the second main channel 12, the discharge line 3 and the bypass line 2 is achieved, so that the first main channel 11, the second main channel 12 can communicate with the discharge line 3 to form a conveying line or with the bypass line 2 to form a circulation loop. Moreover, the slurry conveying device 10 has a simple structure and low manufacturing cost, and the slurry in the main pipeline 1 is in a flowing state, so that the probability of gel due to standing can be reduced, and the operation frequency of gel removal is reduced, thereby reducing the use cost of the slurry conveying device 10, namely, the use cost and the manufacturing cost of the slurry conveying device 10 are reduced, and the manufacturing cost of a battery is reduced.

In some embodiments of the present application, the first port 61 communicates with the third port 63 and the fifth port 65, the second port 62 communicates with the fourth port 64 and the fifth port 65, the first port 61 and the second port 62 are not in communication, and the third port 63 and the fourth port 64 are not in communication.

The connecting piece 6 is a connecting structure only used for connecting the first main channel 11, the second main channel 12, the discharging pipeline 3 and the bypass pipeline 2, and the first main channel 11 and the second main channel 12 can be in a non-communicating or communicating state with the bypass pipeline 2 and the discharging pipeline 3 through the valves arranged on the bypass pipeline 2 and the discharging pipeline 3 in a matching way.

As shown in fig. 1 and 2, a third valve 53 and a fourth valve 54 are respectively disposed at two ends of the bypass pipeline 2, the third valve 53 is disposed near the third port 63, the fourth valve 54 is disposed near the fourth port 64, and the second valve 52 is disposed at one end of the discharge pipeline 3 near the fifth port 65. In the slurry delivery state, the third valve 53 and the fourth valve 54 are closed so that the first main passage 11 and the second main passage 12 are both in non-communication with the bypass line 2, and the second valve 52 is opened so that the first main passage 11 and the second main passage 12 are both in communication with the discharge line 3; in the slurry circulation state, the third valve 53 and the fourth valve 54 are both opened, so that the first main channel 11 and the second main channel 12 are both communicated with the bypass line 2, a circulation loop is formed, and the second valve 52 is closed, so that the first main channel 11 and the second main channel 12 are both not communicated with the discharge line 3.

In the slurry conveying state, as shown in fig. 1 and 2, the flow direction of the slurry is indicated by the straight arrow in fig. 1, the slurry input from the feeding pipeline 4 is divided into two paths, and the two paths of slurry respectively pass through the first main channel 11 and the second main channel 12 and respectively enter the connecting piece 6 through the first port 61 and the second port 62 of the connecting piece 6, and all enter the discharging pipeline 3 through the fifth port 65, so that the slurry is conveyed; in the slurry circulation state, as shown in fig. 2 and 5, the straight arrow in fig. 5 indicates the flow direction of the slurry, and after the slurry transport is stopped, the slurry remaining in the first main passage 11 and the second main passage 12 circulates through the first main passage 11, the first valve 51, the second main passage 12, the second port 62, the fourth port 64, the bypass line 2, the third port 63, and the first port 61 in this order, thereby realizing the circulation flow of the residual slurry.

In this way, by limiting the communication state between the ports of the connecting member 6, the first main channel 11 and the second main channel 12 can be respectively communicated with the discharging pipeline 3 to form a conveying pipeline, or respectively communicated with two ends of the bypass pipeline 2 to form a circulating loop, so that switching between the conveying pipeline and the circulating loop is realized. Moreover, the slurry conveying device 10 has a simple structure and low manufacturing cost, and the slurry in the main pipeline 1 is in a flowing state, so that the probability of gel due to standing can be reduced, and the operation frequency of gel removal is reduced, thereby reducing the use cost of the slurry conveying device 10, namely, the use cost and the manufacturing cost of the slurry conveying device 10 are reduced, and the manufacturing cost of a battery is reduced.

In some embodiments of the present application, the connecting member 6 is a valve having a function of adjusting communication or non-communication between the ports, and in the slurry delivery state, the connecting member 6 is adjusted such that the first port 61 is only communicated with the fifth port 65 and the second port 62 is only communicated with the fifth port 65; in the slurry circulation state, the connection member 6 is adjusted such that the first port 61 communicates only with the third port 63 and the second port 62 communicates only with the fourth port 64.

The first port 61 communicates only with the fifth port 65, and the second port 62 communicates only with the fifth port 65, so that the slurry flowing out from the first main passage 11 and the second main passage 12 flows to the fifth port 65 through the first port 61 and the second port 62, respectively, and is then delivered to the discharge pipe 3. The first port 61 is only communicated with the third port 63, the second port 62 is only communicated with the fourth port 64, so that slurry flowing in from the second main channel 12 can enter the connecting piece 6 through the second port 62, enter the bypass pipeline 2 through the fourth port 64, enter the connecting piece 6 through the third port 63, flow out through the first port 61 and enter the first main channel 11, and the slurry in the first main channel 11 enters the second main channel 12 through the first valve 51 to circulate, thus realizing circulating flow of the slurry in a circulating loop.

In the case of a valve with a regulating function as the connecting piece 6, the third valve 53 and the fourth valve 54 may not be provided on the bypass line 2, and the second valve 52 may not be provided on the discharge line 3. Of course, the third valve 53 and the fourth valve 54 may be provided in the bypass line 2, and the second valve 52 may be provided in the discharge line 3.

In this way, the first main channel 11 and the second main channel 12 are communicated with the discharging pipeline 3 and the bypass pipeline 2 or are not communicated, so that the first main channel 11 and the second main channel 12 can be communicated with the discharging pipeline 3 to form a conveying pipeline or communicated with the bypass pipeline 2 to form a circulating loop, and the switching of the conveying pipeline and the circulating loop is realized. Moreover, the slurry conveying device 10 has a simple structure and low manufacturing cost, and the slurry in the main pipeline is in a flowing state, so that the probability of gel due to standing can be reduced, and the operation frequency of gel removal is reduced, thereby reducing the use cost of the slurry conveying device 10, namely, the use cost and the manufacturing cost of the slurry conveying device 10 are both reduced, and the manufacturing cost of a battery is reduced.

In some embodiments of the application, the first port 61 and the second port 62 are provided at the same end of the connector 6.

In this way, the first port 61 and the second port 62 can be directly connected with the first main channel 11 and the second main channel 12 of the same pipe body 13 respectively, so that the connection structure is simplified, and the manufacturing cost is further reduced.

In some embodiments of the present application, the first port 61 and the second port 62 are disposed at the same end of the connector 6, the fifth port 65 is disposed at the other end of the connector 6 opposite to the first port 61, the third port 63 and the fourth port 64 are disposed at opposite ends of the connector 6, respectively, and the direction of the third port 63 opposite to the fourth port 64 and the direction of the fifth port 65 opposite to the first port 61 are perpendicular to each other.

In this way, the layout of each port of the connector 6 is uniform, which is beneficial to reducing the size of the connector 6, and the space around each port is large, which is convenient for the connection operation of the pipeline and the connector 6.

In some embodiments of the present application, as shown in fig. 1 and 3, one end of the partition plate 14 remote from the connection member 6 is formed with a through hole, the first valve 51 is mounted to the through hole, the first valve 51 is adjusted to a closed state in a slurry transporting state such that the first main passage 11 and the second main passage 12 are not communicated with each other, and the first valve 51 is adjusted to an open state in a slurry circulating state such that the first main passage 11 and the second main passage 12 are communicated with each other.

The first valve 51 adjusts the state in which the first main passage 11 and the second main passage 12 communicate with each other or are not communicated with each other by opening or closing, and performs switching of the conveying line and the circulation circuit. The first valve 51 is arranged at the end of the partition plate 14 far away from the connecting piece 6, so that the slurry flows in the first main channel 11 and the second main channel 12 at a relatively long distance, and the slurry is in a relatively rapid flowing state as much as possible, so that the probability of gel is better reduced.

In some embodiments of the present application, the first valve 51 comprises a one-way valve or a two-way valve.

The check valve and the two-way valve can realize the adjustment of the first main channel 11 and the second main channel 12 which are communicated or not communicated with each other, and the two-way valve has wide optional range and is beneficial to reducing the cost.

In some embodiments of the present application, the slurry delivery device 10 further includes a second valve 52, the second valve 52 is mounted at an end of the discharge pipe 3 near the main pipe 1, in a slurry delivery state, the second valve 52 is adjusted to an open state so that the discharge pipe 3 is in communication with the main pipe 1, and in a slurry circulation state, the second valve 52 is adjusted to a closed state so that the discharge pipe 3 is not in communication with the main pipe 1.

By the arrangement of the second valve 52, the main pipeline 1 and the discharging pipeline 3 are adjusted to be communicated or not communicated, so that the main pipeline 1 can be communicated with the discharging pipeline 3 to form a conveying pipeline or communicated with the bypass pipeline 2 to form a circulating loop, and the switching between the conveying pipeline and the circulating loop is realized. Moreover, the slurry conveying device 10 has a simple structure and low manufacturing cost, and the slurry in the main pipeline 1 is in a flowing state, so that the probability of gel due to standing can be reduced, and the operation frequency of gel removal is reduced, thereby reducing the use cost of the slurry conveying device 10, namely, the use cost and the manufacturing cost of the slurry conveying device 10 are reduced, and the manufacturing cost of a battery is reduced.

In some embodiments of the application, the end of the discharge pipe 3 remote from the main pipe 1 extends into the slurry tank 7, and in the slurry delivery state, the slurry delivered from the feed pipe 4 sequentially passes through the main pipe 1 and the discharge pipe 3 into the slurry tank 7.

The slurry is fed into the slurry tank 7 for the pole piece coating device 30 to perform coating operation.

In some embodiments of the application, the feeding pipe 4 is connected with a first pump 81, and in a slurry conveying state, the first pump 81 drives the slurry to flow in the main pipe 1 and the discharging pipe 3; the bypass line 2 is connected to a second pump 82, and in a slurry circulation state, the second pump 82 drives the slurry in the circulation circuit to circulate in the circulation circuit.

The first pump 81 provides power for the transportation of the slurry, the second pump 82 provides power for the circulation flow of the slurry in the circulation loop, the slurry flows in two states, the probability of gel due to standing can be reduced, the operation times of gel removal can be reduced, and therefore the use cost of the slurry transportation device 10 can be reduced, and in addition, the slurry transportation device 10 is simple in structure and low in manufacturing cost, namely, the use cost and the manufacturing cost of the slurry transportation device 10 are both reduced, and the manufacturing cost of a battery is reduced.

In some embodiments of the application, the first pump 81 comprises a screw pump and the second pump 82 comprises a diaphragm pump.

In the slurry conveying state, the flow rate of the slurry is relatively large, a screw pump with relatively large power is used, the flow rate of the slurry flowing in the circulating loop is relatively small, a diaphragm pump with relatively small power is used, the slurry can flow at a proper flow rate, and the cost is also favorably inhibited.

In some embodiments of the application, the delivery flow rate of the second pump 82 is adjustable, the delivery flow rate adjusted by the second pump 82 being no greater than 150L/min.

For example, the delivery flow rate regulated by the second pump 82 may be 80L/min、85L/min、90L/min、95L/min、100L/min、105L/min、110L/min、115L/min、120L/min、125L/min、130L/min、135L/min、140L/min、145L/min or 150L/min, etc.

In some embodiments of the application, the outfeed line 3 extends in a vertical direction.

The discharge pipeline 3 is arranged to extend along the vertical direction, so that slurry in the discharge pipeline 3 flows downwards under the action of gravity, the energy of the first pump 81 is saved, and in addition, the slurry in the discharge pipeline 3 is not easy to settle on the inner wall of the discharge pipeline 3 in the slurry circulation state, so that the probability of gel is reduced.

In some embodiments of the present application, the partition plate 14 and the pipe body 13 are integrally formed.

Thus, the overall structural strength of the main pipe 1 is improved, and the manufacturing efficiency is high.

In some embodiments of the present application, a fifth valve 55 is provided at an end of the feeding pipe 4 connected to the main pipe 1, and in a slurry transporting state, the fifth valve 55 is in an open state, and the feeding pipe 4 is in communication with the first main channel 11 and the second main channel 12 of the main pipe 1, so that the slurry entering from the feeding pipe 4 can enter the first main channel 11 and the second main channel 12; in the slurry circulation state, the fifth valve 55 is in a closed state, the first main passage 11 and the second main passage 12 are not in communication with the feed pipe 4, and the fifth valve 55 closes the first passage port 111 of the first main passage 11 and the third passage port 121 of the second main passage 12 so that the slurry does not flow back into the feed pipe 4 in the slurry circulation state.

In some embodiments of the present application, the tube 13 is made of hard engineering plastic.

Illustratively, the material of the tube 13 is at least one of polyamide, polytetrafluoroethylene, polyether ether ketone, polyphenylene sulfide, polycarbonate and polyphenylene oxide.

The hard engineering plastic has high mechanical strength, low friction coefficient, high wear resistance and easy obtaining.

Fig. 6 is a schematic structural view of a battery coating line according to some embodiments of the present application.

As shown in fig. 6, a second aspect of the present application provides a battery coating line, which includes a slurry preparation device 20, a pole piece coating device 30, and a slurry conveying device 10 provided in the first aspect of the present application, wherein the slurry preparation device 20 is used for preparing a slurry, and the pole piece coating device 30 is used for coating the slurry on a current collector to form a pole piece; the slurry conveying device 10 is used for conveying the slurry prepared by the slurry preparation device 20 to the pole piece coating device 30.

In the slurry transporting state, the slurry transporting device 10 transports the slurry for the pole piece coating device 30, and in the slurry circulating state, the slurry in the circulation loop circulates in the circulation loop.

Since the battery coating line includes the slurry transporting device 10, the battery coating line includes all the advantageous effects of the slurry transporting device 10, the use cost and the manufacturing cost of the battery coating line are reduced, thereby reducing the manufacturing cost of the battery.

FIG. 7 is a flow chart of a slurry delivery method provided by some embodiments of the present application; fig. 8 is another flow chart of a slurry delivery method provided by some embodiments of the application.

In a third aspect of the present application, there is provided a slurry conveying method using a slurry conveying device 10, the slurry conveying device 10 including a main pipe 1, a bypass pipe 2, and a discharge pipe 3, the bypass pipe 2 being connected to the main pipe 1, one end of the discharge pipe 3 being connected to one end of the main pipe 1, the other end being used for outputting slurry;

As shown in fig. 7, the slurry transporting method includes:

S1, slurry conveying step: the main pipeline is communicated with the bypass pipeline, and the main pipeline is communicated with the discharge pipeline, so that the slurry conveyed from the feeding pipeline is conveyed;

s2, slurry circulation step: the main pipeline and the discharging pipeline are not communicated, and the main pipeline is communicated with the bypass pipeline to form a circulation loop, so that the slurry circularly flows in the circulation loop,

The slurry circulation step is performed in a state where the slurry transport step is stopped.

The slurry transporting step and the slurry circulating step are not sequential, and the slurry circulating step is stopped when the slurry transporting step is stopped, and the slurry circulating step is stopped when the slurry transporting step is required.

In the slurry conveying step, the slurry is conveyed through the main pipeline 1 and the discharging pipeline 3, in the slurry circulating step, the slurry in the main pipeline 1 circularly flows in a circulating loop formed by the main pipeline 1 and the bypass pipeline 2, so that the slurry in the main pipeline 1 is in a flowing state, the probability of gel due to standing can be reduced, the operation frequency of gel removal is reduced, the use cost of the slurry conveying device 10 can be reduced, and the flowing direction of the slurry can be changed by changing the communication state of the main pipeline 1, the bypass pipeline 2 and the discharging pipeline 3, so that the circulating flow of residual slurry is realized, therefore, the structure of the slurry conveying device 10 is relatively simple, the manufacturing cost of the slurry conveying device 10 is low, namely, the use cost and the manufacturing cost of the slurry conveying device 10 are both reduced, and the manufacturing cost of a battery is reduced.

In some embodiments of the application, the main conduit 1 comprises a first main channel 11 and a second main channel 12, the first main channel 11 has a first channel port 111 and a second channel port 112, the second main channel 12 has a third channel port 121 and a fourth channel port 122, the first channel port 111 of the first main channel 11 and the third channel port 121 of the second main channel 12 are respectively connected to the inlet conduit 4, the second channel port 112 of the first main channel 11 and the fourth channel port 122 of the second main channel 12 are respectively connected to the outlet conduit 3, a first valve 51 is arranged between the first main channel 11 and the second main channel 12, the first valve 51 is used for making the first main channel 11 and the second main channel 12 communicate with each other or not communicate with each other;

As shown in fig. 8, the slurry transporting step includes:

S11, conveying route communication: the first main channel and the second main channel are respectively communicated with the discharging pipeline, the first main channel and the second main channel are not communicated with the bypass pipeline, and the first main channel and the second main channel are not communicated with each other through a first valve;

S12, driving a slurry conveying step: dividing the slurry conveyed from the feeding pipeline into two paths and respectively entering the discharging pipeline through a first main channel and a second main channel;

The slurry circulation step comprises the following steps:

S21, a circulating route communicating step: the first main channel and the second main channel are respectively communicated with the bypass pipeline, are not communicated with the discharging pipeline, and are communicated with each other through a first valve;

S22, driving slurry circulation: the slurry in the first main channel and the second main channel is circulated through the first main channel, the second main channel and the bypass line.

In this way, the route is switched firstly, so that the main pipeline 1 is communicated with the discharging pipeline 3 to form a conveying pipeline or is communicated with the bypass pipeline 2 to form a circulating loop, thereby realizing the switching between the conveying pipeline and the circulating loop, then slurry flows in the respective pipelines to realize the conveying or circulating flow of the slurry, the probability of gel due to standing can be reduced, the operation frequency of gel removal is reduced, and the use cost of the slurry conveying device 10 can be reduced.

In some embodiments of the present application, the slurry transporting device 10 further includes a second valve 52, the second valve 52 being installed at an end of the discharge pipe 3 near the main pipe 1;

In the conveying route communication step, the second valve 52 is adjusted to an open state so that the first main passage 11 and the second main passage 12 are respectively communicated with the discharge piping 3;

In the circulation route communication step, the second valve 52 is adjusted to the closed state so that both the first main passage 11 and the second main passage 12 are not in communication with the discharge pipe 3.

The adjustment of the second valve 52 realizes the adjustment of the communication or non-communication between the main pipeline 1 and the discharging pipeline 3, so that the main pipeline 1 can be communicated with the discharging pipeline 3 to form a conveying pipeline or communicated with the bypass pipeline 2 to form a circulating loop, thereby realizing the switching between the conveying pipeline and the circulating loop. Moreover, the slurry conveying device 10 has a simple structure and low manufacturing cost, and the slurry in the main pipeline 1 is in a flowing state, so that the probability of gel due to standing can be reduced, and the operation frequency of gel removal is reduced, thereby reducing the use cost of the slurry conveying device 10, namely, the use cost and the manufacturing cost of the slurry conveying device 10 are reduced, and the manufacturing cost of a battery is reduced.

In some embodiments of the application, the feed conduit 4 is connected to a first pump 81 and the bypass conduit 2 is connected to a second pump 82;

In the step of driving the slurry to be conveyed, the first pump 81 is started, and the slurry conveyed from the feeding pipeline 4 is driven to be divided into two paths and respectively enters the discharging pipeline 3 through the first main channel 11 and the second main channel 12;

in the drive slurry circulation step, the second pump 82 is activated, and the slurry in the first main passage 11 and the second main passage 12 is driven to circulate through the first main passage 11, the second main passage 12, and the bypass line 2.

The first pump 81 drives the slurry to flow in the conveying pipeline, the second pump 82 drives the slurry to circulate in the circulation loop, so that the slurry flows in two states, the probability of gel due to standing can be reduced, the operation frequency of gel removal is reduced, and therefore the use cost of the slurry conveying device 10 can be reduced, and in addition, the slurry conveying device 10 is simple in structure and low in manufacturing cost, namely, the use cost and the manufacturing cost of the slurry conveying device 10 are both reduced, and the manufacturing cost of a battery is reduced.

Specific examples of some embodiments of the present application are described below with reference to the drawings.

As a specific example, the slurry transporting device 10 includes a main pipe (main pipe 1), a bypass pipe (bypass pipe 2) and a discharge pipe (discharge pipe 3), the bypass pipe and the discharge pipe are connected to the main pipe, one end of the discharge pipe, which is far away from the main pipe, extends into a transfer tank (slurry tank 7) having a capacity of 1200L, a pipe partition plate (partition plate 14) is provided in an inner passage of the main pipe, the pipe partition plate partitions the inner passage into a first flow passage (first main passage 11) and a second flow passage (second main passage 12), one end of the pipe partition plate, which is far away from the bypass pipe, is provided with a check valve (first valve 51), the main pipe and the discharge pipe are connected through an on-off valve (connecting piece 6), both ends of the bypass pipe are connected to the on-off valve, one end of the discharge pipe, which is near the main pipe, is provided with a discharge valve (second valve 52), and an upstream of the main pipe is provided with a screw pump (first pump 81), the bypass pipe is connected with a diaphragm pump (second pump 82).

When the slurry conveying device 10 conveys slurry, the discharge valve is opened, the one-way valve is closed, the on-off valve regulates the first flow passage and the second flow passage to be communicated with the discharge pipe respectively, the screw pump is started, and the slurry sequentially enters the transfer tank through the main pipe and the discharge pipe; when the slurry conveying device 10 stops conveying the slurry, the discharge valve is closed, the one-way valve is opened, the on-off valve regulates the first flow channel and the second flow channel to be communicated with the two ends of the bypass pipeline respectively to form a circulation loop, the screw pump is closed, the diaphragm pump is started, and the slurry remained in the first flow channel and the second flow channel circularly flows in the circulation loop.

The delivery flow rate of the diaphragm pump is adjustable within 0-150L/min, and the recommended value of the delivery flow rate of the diaphragm pump is 100L/min.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and they should be included in the scope of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A slurry delivery device, comprising:

a main pipeline;

a bypass line connected to the main line;

One end of the discharging pipeline is connected to one end of the main pipeline, and the other end of the discharging pipeline is used for outputting slurry;

The slurry conveying device is provided with a slurry conveying state and a slurry circulating state, wherein in the slurry conveying state, the main pipeline is not communicated with the bypass pipeline, the main pipeline is communicated with the discharge pipeline so as to convey slurry conveyed from the feeding pipeline, and in the slurry circulating state, the main pipeline is not communicated with the discharge pipeline, and the main pipeline is communicated with the bypass pipeline so as to form a circulating loop for circulating and flowing the slurry;

the main conduit includes a first main passage having a first passage opening and a second passage opening, and a second main passage having a third passage opening and a fourth passage opening,

The first channel opening of the first main channel and the third channel opening of the second main channel are respectively connected with the feeding pipeline,

The second channel opening of the first main channel and the fourth channel opening of the second main channel are respectively connected to the discharging pipeline, a first valve is arranged between the first main channel and the second main channel, and the first valve is used for enabling the first main channel and the second main channel to be communicated with each other or not communicated with each other.

2. The slurry transporting device according to claim 1, wherein the main pipe includes a pipe body and a partition plate provided in the pipe body, the partition plate dividing a passage in the pipe body into the first main passage and the second main passage, the first valve being provided in the partition plate.

3. The slurry delivery device of claim 2, further comprising a connector connected to the main conduit, the discharge conduit, and the bypass conduit, respectively.

4. A slurry delivery device according to claim 3, wherein the connector has a first port, a second port, a third port, a fourth port and a fifth port, the first port being connected to the second port of the first main passage, the second port being connected to the fourth port of the second main passage, the third port and the fourth port being connected to both ends of the bypass line, respectively, and the fifth port being connected to the discharge line.

5. The slurry delivery device according to claim 4, wherein the first port is in communication with the third port and the fifth port, the second port is in communication with the fourth port and the fifth port, the first port and the second port are not in communication, and the third port and the fourth port are not in communication.

6. The slurry delivery device of claim 5, wherein the first port and the second port are disposed at a same end of the connector.

7. A slurry transporting apparatus according to claim 3, wherein said partition plate is formed with a through hole at an end thereof remote from said connecting member, said first valve is mounted to said through hole,

In the slurry transporting state, the first valve is adjusted to a closed state so that the first main passage and the second main passage are not communicated with each other,

In the slurry circulation state, the first valve is adjusted to an open state so that the first main passage and the second main passage communicate with each other.

8. The slurry transporting apparatus according to any one of claims 1 to 7, further comprising a second valve mounted to an end of said discharge pipe near said main pipe,

In the slurry transporting state, the second valve is adjusted to an open state so that the discharge pipe and the main pipe are communicated,

In the slurry circulation state, the second valve is adjusted to a closed state so that the discharge pipe and the main pipe are not communicated.

9. The slurry transporting apparatus according to any one of claims 1 to 7, wherein an end of the discharge pipe away from the main pipe extends into a slurry tank, and in the slurry transporting state, slurry transported from the feed pipe sequentially passes through the main pipe and the discharge pipe into the slurry tank.

10. The slurry delivery device according to any one of claims 1 to 7, wherein the feed pipe is connected to a first pump that drives slurry to flow in the main pipe and the discharge pipe in the slurry delivery state;

The bypass pipeline is connected with a second pump, and in the slurry circulation state, the second pump drives the slurry in the circulation loop to circulate in the circulation loop.

11. The slurry conveying device according to any one of claims 1 to 7, wherein the discharge pipe extends in a vertical direction.

12. A battery coating line, comprising:

the slurry preparation device is used for preparing slurry;

The slurry transporting device according to any one of claims 1 to 11;

The pole piece coating device is used for coating the slurry on the current collector to form a pole piece;

The slurry conveying device is used for conveying the slurry prepared by the slurry preparation device to the pole piece coating device.

13. The slurry conveying method is characterized by using a slurry conveying device, wherein the slurry conveying device comprises a main pipeline, a bypass pipeline and a discharge pipeline, the bypass pipeline is connected to the main pipeline, one end of the discharge pipeline is connected to one end of the main pipeline, and the other end of the discharge pipeline is used for outputting slurry;

the slurry conveying method comprises the following steps:

The slurry conveying step comprises the following steps:

The slurry circulation step includes:

14. The slurry conveying method according to claim 13, wherein the slurry conveying apparatus further comprises a second valve installed at an end of the discharge pipe near the main pipe;

15. The slurry delivery method according to claim 13, wherein the feed conduit is connected to a first pump and the bypass conduit is connected to a second pump;