CN216094587U

CN216094587U - Feeding system of conductive paste

Info

Publication number: CN216094587U
Application number: CN202023349308.7U
Authority: CN
Inventors: 李越旺; 杨少群; 陈浩周
Original assignee: Foshan Zhongji Ximi New Material Co ltd
Current assignee: Foshan Zhongji Ximi New Material Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-03-22
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a feeding system of conductive slurry, which comprises a storage tank, a power device and an iron removal device, wherein the storage tank is used for storing the conductive slurry, the power device is connected between the storage tank and the iron removal device, and the conductive slurry in the storage tank is conveyed to the iron removal device; the iron removing device comprises a shell, an upper cover and a magnetic rod connected with the upper cover, wherein the shell is provided with an accommodating cavity, the upper cover covers the shell, and the magnetic rod is inserted into the accommodating cavity; the lateral wall of magnetic rod is equipped with a plurality of magnetic stripes that stretch out that lean out, the magnetic stripe with the contained angle of magnetic rod is 20 ~ 60 degrees. The feeding system of the present invention effectively removes iron and impurities in the conductive paste.

Description

Feeding system of conductive paste

Technical Field

The utility model relates to the technical field of secondary batteries, in particular to a feeding system of conductive paste.

Background

The secondary battery is represented by a lithium ion battery and the like, and has an important position in the 3C consumption field, a new energy power battery and a large-scale energy storage battery due to excellent comprehensive performance.

The current collector of a secondary battery such as a lithium ion battery refers to a structure or a part for collecting current, and in the case of the lithium ion battery, mainly refers to a metal foil such as a copper foil or an aluminum foil. The broad fingers may also include tabs. The function of the current collector is to collect the current generated by the active materials of the battery so as to form a larger current output, therefore, the current collector should be in full contact with the active materials, and the internal resistance should be as small as possible.

In the prior art, the surface treatment of the conductive base material of the battery by using the functional coating is a breakthrough technical innovation, and the carbon-coated aluminum foil/copper foil is formed by uniformly and finely coating the dispersed conductive materials such as nano conductive graphite, carbon-coated particles, carbon nano tubes and the like on the aluminum foil/copper foil. The conductive material can provide excellent static conductivity, collect micro-current of active substance, thereby greatly reducing contact resistance between positive/negative electrode material and current collection, improving fixation capacity between the positive/negative electrode material and the current collection, reducing usage amount of binder, and further significantly improving overall performance of the battery.

The existing carbon-coated foil is prepared by compounding conductive materials such as graphite, carbon black, multi-layer carbon nano tubes and the like, and coating conductive slurry which is uniformly dispersed with dispersants and binders in different proportions on an aluminum foil or a copper foil. The coating machine is directly carried from the storage tank to current conductive paste and coats, because impurity such as iron contains in the conductive paste, can influence the thickness and the performance of coating, also blocks up the shower nozzle of coating machine easily, and then influences the performance of mass flow body.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a feeding system of conductive paste, which can effectively remove iron and impurities in the conductive paste.

In order to solve the technical problem, the utility model provides a conductive slurry feeding system which comprises a storage tank, a power device and an iron removal device, wherein the storage tank is used for storing conductive slurry, and the power device is connected between the storage tank and the iron removal device and used for conveying the conductive slurry in the storage tank to the iron removal device; the iron removing device comprises a shell, an upper cover and a magnetic rod connected with the upper cover, wherein the shell is provided with an accommodating cavity, the upper cover covers the shell, and the magnetic rod is inserted into the accommodating cavity; the lateral wall of magnetic rod is equipped with a plurality of magnetic stripes that stretch out that lean out, the magnetic stripe with the contained angle of magnetic rod is 20 ~ 60 degrees.

As an improvement of the scheme, the magnetic strips are spirally arranged around the magnetic rods from top to bottom, the shell is provided with a feed inlet and a discharge outlet, the feed inlet is arranged above the shell, and the discharge outlet is arranged below one side of the shell opposite to the feed inlet.

As an improvement of the scheme, the distance between the magnetic strips is 5% -16% of the height of the accommodating cavity.

As an improvement of the scheme, the distance between the magnetic strips is 7% -13% of the height of the accommodating cavity.

As an improvement of the scheme, a plurality of concave holes are formed in the magnetic strip.

As an improvement of the scheme, the depth of the concave hole is 1-5 mm.

As an improvement of the scheme, the magnetic strip is further provided with a plurality of through holes, the through holes penetrate through the magnetic strip, and the through holes and the concave holes are alternately arranged.

The implementation of the utility model has the following beneficial effects:

the feeding system of the conductive paste comprises a storage tank, a power device and an iron removal device, wherein the storage tank is used for storing the conductive paste, the iron removal device comprises a shell, an upper cover and a magnetic rod connected with the upper cover, a plurality of magnetic stripes extending outwards in an inclined mode are arranged on the side wall of the magnetic rod, and the included angle between the magnetic stripes and the magnetic rod is 20-60 degrees. According to the utility model, the magnetic strips are arranged on the side wall of the magnetic rod, so that the contact area between the magnetic rod and the conductive paste can be increased, and the iron removal effect of the conductive paste is improved.

According to the utility model, the magnetic strips are spirally arranged around the magnetic rod from top to bottom, the feed inlet is arranged above the shell, the discharge outlet is arranged below the side of the shell opposite to the feed inlet, and the conductive slurry enters from the feed inlet and then flows in the accommodating cavity in a vortex manner through the matching of the magnetic rod, the magnetic strips, the feed inlet and the discharge outlet, so that the flowability of the conductive slurry can be enhanced under the condition that the magnetic rod is not rotated, the contact efficiency of the conductive slurry with the magnetic rod and the magnetic strips is enhanced, the iron removal effect of the conductive slurry is improved, and the mixing uniformity of substances in the conductive slurry is further enhanced.

According to the utility model, the plurality of concave holes are formed in the magnetic strip, so that the contact area between the magnetic strip and the conductive paste is increased, and iron or other impurities are stored in the magnetic strip, so that the conductive paste is prevented from scouring the iron or other impurities back again when flowing, and the iron removal effect of the conductive paste is further improved.

According to the utility model, the magnetic strip is provided with the plurality of through holes communicated with the concave holes, and the through holes and the concave holes are alternately arranged, so that the friction force between the magnetic strip and the conductive paste is further reduced through the through holes, the contact area between the magnetic strip and the conductive paste is increased, and the iron removal effect of the conductive paste is further improved.

Drawings

FIG. 1 is a schematic view of a feed system of the present invention;

FIG. 2 is a schematic structural view of an iron removing device according to the present invention;

FIG. 3 is a top view of the magnetic wand and magnetic strip of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the conductive paste feeding system provided by the utility model comprises a storage tank 1, a power device 2 and an iron removal device 3, wherein the storage tank 1 is used for storing conductive paste, and the power device 2 is connected between the storage tank 1 and the iron removal device 2 and is used for conveying the conductive paste in the storage tank 1 to the iron removal device 3.

Specifically, the power device 2 is connected with the material storage tank 1 and the iron removal device 3 through pipelines, and is used for controlling the conveying speed and the flow rate of the conductive slurry. Preferably, the power device 2 is a peristaltic pump, but is not limited thereto.

Referring to fig. 2, the iron removing device 3 includes a housing 31, an upper cover 32, and a magnetic rod 33 connected to the upper cover 32, the housing 31 is provided with a containing cavity 311, the upper cover 32 covers the housing 31, the magnetic rod 33 is inserted into the containing cavity 311, and the magnetic rod 33 magnetically absorbs the magnets, impurities, and the like in the conductive paste in the containing cavity 311.

Specifically, the side wall of the magnetic rod 33 is provided with a plurality of magnetic strips 331 extending outwards in an inclined manner, and the included angle between the magnetic strips 331 and the magnetic rod 33 is 20-60 degrees.

Preferably, the magnetic stripe 331 is spirally arranged around the magnetic rod 33 from top to bottom, the housing 31 is provided with a feeding hole 312 and a discharging hole 313, the feeding hole 312 is arranged above the housing 31, the discharging hole 313 is arranged below one side of the housing 31 opposite to the feeding hole 312, and under the cooperation of the magnetic rod 33, the magnetic stripe 331, the feeding hole 312 and the discharging hole 313, the conductive paste can flow in the accommodating cavity 311 in a vortex manner after entering from the feeding hole 312, so that the fluidity of the conductive paste can be enhanced under the condition that the magnetic rod 33 is not rotated, the contact efficiency of the conductive paste with the magnetic rod 33 and the magnetic stripe 331 is enhanced, the iron removal effect of the conductive paste is improved, and the mixing uniformity of the substances in the conductive paste is further enhanced.

If the flowing speed of the conductive paste in the accommodating cavity 311 is too high, the friction between the conductive paste and the shell 31, the magnetic rod 33 and the magnetic stripe 331 is increased, and the iron removal effect and performance of the conductive paste are adversely affected. The utility model can control the flow rate of the conductive paste in the accommodating cavity 311 through the distribution of the magnetic strips 331 in addition to the power device. Specifically, the distance between the magnetic strips 331 is 5% -16% of the height of the accommodating cavity 311. Preferably, the distance between the magnetic strips 331 is 7% -13% of the height of the accommodating cavity 311.

Referring to fig. 3, a plurality of concave holes 332 are formed in the magnetic stripe 331, the concave holes 332 can increase the contact area between the magnetic stripe 331 and the conductive paste, and can store iron or other impurities therein, so that the conductive paste is prevented from scouring the iron or other impurities back again when flowing, and the iron removal effect of the conductive paste is further improved.

Preferably, the depth of the concave hole 332 is 1-5 mm. Preferably, the depth of the concave hole 332 is 2-4 mm.

Preferably, a plurality of through holes 333 are further formed in the magnetic stripe 331, and the through holes 333 penetrate through the magnetic stripe 331 and are alternately arranged with the concave holes 332. The through holes 333 further reduce the friction force between the magnetic strip 331 and the conductive paste, increase the contact area between the magnetic strip 331 and the conductive paste, and further improve the iron removal effect of the conductive paste.

The magnetic bar 33 and the magnetic stripe 331 are integrally formed.

While the utility model has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the utility model is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. The feeding system of the conductive slurry is characterized by comprising a storage tank, a power device and an iron removal device, wherein the storage tank is used for storing the conductive slurry, and the power device is connected between the storage tank and the iron removal device and used for conveying the conductive slurry in the storage tank to the iron removal device; the iron removing device comprises a shell, an upper cover and a magnetic rod connected with the upper cover, wherein the shell is provided with an accommodating cavity, the upper cover covers the shell, and the magnetic rod is inserted into the accommodating cavity; the lateral wall of magnetic rod is equipped with a plurality of magnetic stripes that stretch out that lean out, the magnetic stripe with the contained angle of magnetic rod is 20 ~ 60 degrees.

2. The conductive paste feeding system according to claim 1, wherein the magnetic strip is spirally arranged around the magnetic rod from top to bottom, the housing is provided with a feeding port and a discharging port, the feeding port is arranged above the housing, and the discharging port is arranged below the side of the housing opposite to the feeding port.

3. The conductive paste supply system according to claim 2, wherein the distance between the magnetic strips is 5% to 16% of the height of the receiving chamber.

4. The conductive paste supply system according to claim 3, wherein the distance between the magnetic strips is 7% to 13% of the height of the receiving chamber.

5. The conductive paste supply system according to claim 1, wherein the magnetic strip has a plurality of recesses.

6. The conductive paste supplying system according to claim 5, wherein the depth of the recess is 1 to 5 mm.

7. The conductive paste supply system according to claim 5, wherein the magnetic strip is further provided with a plurality of through holes, the through holes penetrate through the magnetic strip and are alternately arranged with the concave holes.