Preparation system and preparation method of battery pole piece

A technology for preparing systems and battery pole pieces, applied in electrode manufacturing, battery electrodes, secondary batteries, etc., can solve the problems of unenvironmental protection, inconsistent positive and negative surface densities of bipolar pole pieces, slow coating efficiency, etc.

Active Publication Date: 2022-04-08
FARASIS TECH (GANZHOU) CO LTD +1
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the existing pole piece manufacturing process, the wet coating method is generally used, which has slow coating efficiency, is not environmentally friendly, and consumes a lot of energy.
Moreover, during the pole piece manufacturing process, if the pole powder sprayed on both sides is inconsistent, the pole powder sprayed first is prone to cross-contamination
[0003] For example, when preparing bipolar battery pole pieces, due to the inconsistency in the surface density and compaction density of the positive and negative electrodes of the bipolar pole piece, special methods are required to achieve different surface densities and inconsistency in compaction density on both sides of the coating. For example, the public The invention patent No. CN111430671A discloses a method for preparing bipolar pole pieces. In this method, the first rolling treatment is performed on the rough positive electrode material layer on one surface of the current collector, and then the other surface of the current collector is set. The rough negative electrode material and the rough positive electrode material after the first rolling treatment are subjected to the second rolling treatment at the same time to obtain bipolar pole pieces with inconsistent compacted densities. template, and inject the slurry of positive electrode material or negative electrode material into the template, and dry it to obtain the rough blank of positive electrode material or negative electrode material. The process is cumbersome and prone to pollution, etc.
[0004] In the existing process of electrostatic spraying on the base material of the pole piece, when one side of the base material of the pole piece is electrostatically sprayed, if the other side is not protected, it will be easily polluted by the pole powder, which will affect the manufacture of subsequent battery pole pieces and use

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation system and preparation method of battery pole piece
  • Preparation system and preparation method of battery pole piece
  • Preparation system and preparation method of battery pole piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Such as figure 1 As shown, a battery pole piece preparation system of this embodiment includes a pole piece base material unwinding device 1, a pole piece base material winding device 13, an electrostatic spraying device, an isolation device and a rolling device, and the pole piece The substrate unwinding device 1 and the pole piece base material winding device 13 are arranged at intervals to be used for the winding and unwinding of the pole piece base material 11, and the electrostatic spraying device and the isolating device are arranged along a direction perpendicular to the winding or unwinding The direction is relatively arranged between the pole piece base material unwinding device 1 and the pole piece base material winding device 13, and there is a device for the pole piece base material 11 to pass between the electrostatic spraying device and the isolation device. gap, the rolling device is arranged downstream of the electrostatic spraying device in the moving d...

specific Embodiment approach 1

[0061] Embodiment one, the first isolating device 3 can be directly covered on one side of the pole piece base material 11 by using an isolation cover, and the isolation cover can be infinitely close to one side of the pole piece base material 11, so that effective isolation and protection can be realized. It will not affect the winding and unwinding movement of the pole piece base material 11 . A dust suction part can also be arranged in the isolation cover to effectively absorb the dust entering the isolation cover.

specific Embodiment approach 2

[0062] Specific implementation mode two, such as figure 1 As shown, the first isolation device 3 includes a transmission mechanism and a first isolation film 34, and the first isolation film 34 is attached to one side of the pole piece base material 11 and covers the other side of the pole piece base material 11. In the spray coating area, the conveying mechanism is connected with the first isolation film 34 and drives the first isolation film 34 to reciprocate along the moving direction of the pole piece base material 11 . The other side of the pole piece base material 11 corresponds to the spray coating area of ​​the electrostatic spraying device. When the pole powder is sprayed, one side of the pole piece base material 11 is effectively attached to the first isolation film 34, and no dust will enter The gap can effectively isolate the protection, isolate the external dust, and avoid being polluted by the sprayed powder. And because the pole piece base material 11 moves con...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
densityaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to a preparation system and a preparation method of a battery pole piece, the preparation system comprises a pole piece base material unwinding device, a pole piece base material winding device, an electrostatic spraying device, an isolation device and a rolling device, the pole piece base material unwinding device and the pole piece base material winding device are arranged at an interval to form an interval for winding and unwinding a pole piece base material; the electrostatic spraying device and the isolation device are oppositely arranged in the interval, a gap for a pole piece base material to pass through is formed between the electrostatic spraying device and the isolation device, and the rolling device is arranged at the downstream of the electrostatic spraying device in the movement direction of the pole piece base material. The electrostatic spraying device is adopted to coat the pole piece base material with the pole powder, pole powder coating and rolling can be continuously operated, the drying procedure is not needed, and the field is saved. And the isolation device can effectively isolate one side surface, so that pole powder sprayed by the electrostatic spraying device is prevented from falling onto one side surface to cause pollution, and subsequent manufacturing and use of the battery pole piece are not influenced.

Description

technical field [0001] The invention relates to the technical field of battery pole piece preparation, in particular to a battery pole piece preparation system and method. Background technique [0002] In the existing pole piece manufacturing process, the method of wet coating is generally adopted, which has slow coating efficiency, is not environmentally friendly, and consumes a lot of energy. Moreover, during the pole piece manufacturing process, if the pole powder sprayed on both sides is inconsistent, the pole powder sprayed first is prone to cross-contamination. [0003] For example, when preparing bipolar battery pole pieces, due to the inconsistency in the surface density and compaction density of the positive and negative electrodes of the bipolar pole piece, special methods are required to achieve different surface densities and inconsistency in compaction density on both sides of the coating. For example, the public The invention patent No. CN111430671A discloses ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/139H01M10/052H01M10/0525H01M10/054
CPCY02E60/10
Inventor 罗春燕吕金钊肖劲吴强唐志深
Owner FARASIS TECH (GANZHOU) CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products