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Device and method for manufacturing lithium ion battery pole piece

A technology for lithium-ion batteries and preparation devices, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of increased impedance of lithium-ion battery pole pieces, enrichment of conductive agents on the surface and poor bottom layers, etc., to reduce impedance and improve performance effect

Active Publication Date: 2012-02-01
DONGGUAN AMPEREX TECH
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Problems solved by technology

When the slurry is coated on the current collector and sent into the oven through the transmission device, the viscosity of the slurry decreases with the increase of the temperature, and the active material settles to the bottom layer due to the reduction of the internal friction force of the larger particles; Due to the small size and light weight of the conductive agent particles, they will move to the surface layer with the solvent, which will cause the surface layer of the conductive agent to be enriched and the bottom layer poor, resulting in an increase in the impedance of the lithium-ion battery pole piece.

Method used

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  • Device and method for manufacturing lithium ion battery pole piece
  • Device and method for manufacturing lithium ion battery pole piece
  • Device and method for manufacturing lithium ion battery pole piece

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Embodiment Construction

[0022] In order to make the object, technical solution and technical effect of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.

[0023] see Figure 1 to Figure 3 As shown, the lithium ion battery pole piece preparation device of the present invention includes a pole piece conveying device 20 , an oven 30 surrounding the pole piece conveying device 20 , and a magnet device 40 disposed in the oven 30 .

[0024] The pole piece conveying device 20 is a transmission roller located on two opposite sides of the oven 30. Driven by the motor, the pole piece conveying device 20 can move the lithium ion battery pole piece 10 placed on it from the oven 30 along the direction A shown in the figure. ...

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Abstract

The invention discloses a device for manufacturing a lithium ion battery pole piece. The device comprises a pole piece transmitting device and a drying oven surrounding the pole piece transmitting device, wherein the drying oven is internally provided with a magnet device which can be used for generating a non-uniform strong magnetic field. In the device for manufacturing the lithium ion battery pole piece in the invention, the non-uniform strong magnetic field generated by the magnet device can be used for regulating the distribution of an electroconductive agent in the lithium ion battery pole piece, so that the impedance of the lithium ion battery pole piece is effectively reduced. In addition, the invention further discloses a method for manufacturing the lithium ion battery pole piece.

Description

technical field [0001] The invention belongs to the field of lithium-ion batteries, and more specifically, the invention relates to a preparation device and method for lithium-ion battery pole pieces. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high reliability, good processability and no environmental pollution, so they are widely used in various portable electronic devices. [0003] A lithium-ion battery generally includes a positive electrode sheet, a negative electrode sheet, a separator spaced between the positive electrode sheet and the negative electrode sheet, and an electrolyte. Wherein, the positive electrode sheet includes a positive electrode collector and a positive electrode membrane distributed on the positive electrode collector, and the negative electrode sheet includes a negative electrode collector and a negative electrode membrane distributed on the negative electrode collector. The positive electrode m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/139H01M4/62
CPCY02E60/122Y02E60/10
Inventor 刘坤
Owner DONGGUAN AMPEREX TECH
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