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Paste coating method of bipolar plate

A bipolar plate and pasting technology, which is applied in the direction of coating, lead-acid battery electrodes, devices for coating liquid on the surface, etc. Problems such as low paste efficiency

Inactive Publication Date: 2019-02-15
GUANGZHOU ZHUOYUE POWER NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the plastering of the polar plates is generally done mechanically, but the existing pasting equipment has the following problems: a set of pasting equipment cannot simultaneously perform the pasting operations of the positive plate and the negative plate, and the efficiency of the plastering of the pole plates is low

Method used

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  • Paste coating method of bipolar plate
  • Paste coating method of bipolar plate

Examples

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Embodiment 1

[0021] The embodiment is basically as attached figure 1 and figure 2 Shown: Bipolar plate pasting method, including the following steps:

[0022] (1) Prepare a positive paste and a negative paste, wherein the apparent density of the positive paste is 4.23g / cm3, and the apparent density of the negative paste is 4.38g / cm3.

[0023] (2) paste preparation: adopt bipolar plate paste equipment to apply paste, bipolar plate paste equipment includes frame 1, incomplete gear 22, first gear 21, rotating shaft 24, rotating shaft 20 and motor 19, machine A transmission mechanism is provided on the frame 1, and the transmission mechanism includes a conveyor belt 2 and a conveyor roller, and the conveyor belt 2 is driven by the conveyor roller. The motor 19 is fixed on the frame 1 and the output shaft of the motor 19 is connected with the rotating shaft 24 through a coupling. The incomplete gear 22 is fixed coaxially with the rotating shaft 24 . The first gear 21 is fixed on the rotati...

Embodiment 2

[0031] Compared with Embodiment 1, there are differences in the following steps in this embodiment:

[0032] (1) positive paste and negative paste are prepared, wherein the apparent density of the positive paste is 4.27g / cm3, and the apparent density of the negative paste is 4.42g / cm3;

[0033](5) acid leaching: adopting density is 1.4g / cm Dilute sulfuric acid carries out acid leaching to the pole plate in step (4);

[0034] (6) Curing: put the pole plate after acid rinsing in step (5) into a drying kiln for drying, the drying temperature is 120°C, the time is 2-5min, and the relative humidity of the drying kiln is 75%.

Embodiment 3

[0036] Compared with Embodiment 1, there are differences in the following steps in this embodiment:

[0037] (1) positive paste and negative paste are prepared, wherein the apparent density of the positive paste is 4.24g / cm3, and the apparent density of the negative paste is 4.39g / cm3;

[0038] (5) acid leaching: adopting density is 1.4g / cm Dilute sulfuric acid carries out acid leaching to the pole plate in step (4);

[0039] (6) Curing: put the pole plate after acid rinsing in step (5) into a drying kiln for drying, the drying temperature is 120°C, the time is 5min, and the relative humidity of the drying kiln is 75-90%.

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Abstract

The invention belongs to the technical field of battery processing, and particularly discloses a paste coating method of a bipolar plate. The paste coating method of the bipolar plate comprises the following steps that (1) a positive paste and a negative paste are prepared, wherein the apparent density of the positive paste is 4.23-4.27g / cm<3>, and the apparent density of the negative paste is 4.38-4.42 g / cm<3>; (2) the paste coating is prepared: (3) the positive paste and the negative paste are placed on a positive plate paste coating hopper and a negative plate paste coating hopper, and paste coating preparation is carried out; (4) the paste coating is carried out, bipolar plate paste coating equipment is started, polar plates are placed on a conveying mechanism to be conveyed, and the polar plates are coated with a paste; (5) acid leaching is carried out on the polar plates in the step (4) by using dilute sulfuric acid with the density of 1.4-1.46g / cm<3>; and (6) curing is carried out, the pole plates subjected to the acid leaching in the step (5) are put into a drying pit for drying, wherein the drying temperature is 100-120 DEG C, and the time is 2-5 minutes. The method can solve the problem that the positive plate and the negative plate are coated with the paste at the same time, so that the working efficiency of the paste coating is improved.

Description

technical field [0001] The invention relates to the technical field of battery processing, in particular to a bipolar plate paste coating method. Background technique [0002] With the rapid development of the battery industry, the demand for batteries is increasing, and the capacity and service life of batteries are the most concerned issues for consumers. The battery is mainly composed of plates, electrolytes, separators, shells and terminals. , The thickness of the battery plate directly determines the capacity and service life of the battery. Plate paste refers to the process of applying paste with active material as the main component on the grid or skeleton. Some battery manufacturers use manual method to paste the plate, and choose different plates according to different batteries. The active substance is anointed. At present, the plastering of the pole plate is generally done by machinery, but the existing pasting equipment has the following problems: a set of past...

Claims

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Application Information

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IPC IPC(8): B05C5/02B05C13/02B05D3/10B05D1/26H01M4/21H01M4/20
CPCH01M4/20H01M4/21B05C5/0225B05C13/02B05D1/26B05D3/108Y02E60/10
Inventor 何幸华黎少伟李政文何可立马俊
Owner GUANGZHOU ZHUOYUE POWER NEW ENERGY CO LTD
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