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Lithium battery diaphragm coating system

A lithium battery separator and coating machine technology, which is applied to battery pack parts, devices for coating liquid on the surface, coatings, etc. problems, to achieve the effect of improving coating quality and reducing air bubbles

Inactive Publication Date: 2020-06-23
中材锂膜(宁乡)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the coating process of existing lithium battery separators, due to the existence of a large number of air bubbles in the slurry for coating, the air bubbles inside the slurry will be coated on the separator during coating. white spot
The slurry coating on the circular spots is very thin, which can easily cause micro-short circuit during battery charging and discharging, which will affect the service life and safety of the battery

Method used

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Embodiment Construction

[0022] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present invention, but should not be understood as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Axial", "Radial", "Circumferential" The orientation or positional relationship of other indications is based on the orientation or positional relationship shown in the drawings, which is only used to facilitate the description of the pres...

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PUM

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Abstract

The invention discloses a lithium battery diaphragm coating system. The lithium battery diaphragm coating system comprises a stirring tank and a buffer tank, a feeding pipe and a discharging pipe areinstalled on the stirring tank, the feeding pipe is used for injecting slurry into the stirring tank, and the discharging pipe is used for being communicated with a coating machine so as to supply theslurry to the coating machine; the buffer tank is communicated with the coating machine through a return pipe to receive the slurry recovered from the coating machine, the bottom of the buffer box isa slope, and the discharging pipe for discharging the slurry in the buffer tank is arranged at the inclined lower end of the slope; and the discharging pipe is communicated with the feeding pipe. According to the lithium battery diaphragm coating system, the number of bubbles in the slurry for coating a diaphragm can be reduced, and the coating quality of the diaphragm is improved.

Description

Technical field [0001] The invention relates to the technical field of production equipment for lithium battery diaphragms, and in particular to a lithium battery diaphragm coating system. Background technique [0002] Lithium batteries usually mainly consist of a positive electrode, a negative electrode, a separator, an electrolyte, and a battery casing. In the structure of lithium batteries, the diaphragm is one of the key internal components. The main function of the separator is to separate the positive and negative electrodes of the battery to prevent direct contact between the positive and negative electrodes and short-circuit, and at the same time to enable the electrolyte ions to pass smoothly during the charging and discharging process of the battery, forming a current, and abnormal battery operating temperature When rising, close the migration channel of electrolyte ions and cut off the current to ensure battery safety. [0003] Lithium battery separators are mainly mad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05C11/10H01M2/14
CPCB05C11/10H01M50/403Y02E60/10
Inventor 舒均国聂文波王伟杨润刘晓
Owner 中材锂膜(宁乡)有限公司
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