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Conductive agent in active substance of composite carbon paste extrusion type positive unformed plate and preparation method of positive unformed plate

A technology of active material and composite carbon, which is applied in the direction of circuits, electrical components, battery electrodes, etc., can solve the problems of low porosity of positive plate active material, inability to form conductive network structure, and affect battery formation effect, so as to improve charge acceptance , enhance the binding force, improve the effect of conductivity

Pending Publication Date: 2022-03-18
ZIBO TORCH ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the production of the extruded positive plate adopts the constant pressure linkage extruding method, the active material in the tube is relatively tight after extruding the paste, and polarization problems are prone to occur when the plate is formed, that is, due to the low porosity of the active material of the positive plate, the relative porosity is small , the polarization reaction of the plate is obvious at the initial stage of battery charging, and a good conductive network structure cannot be formed, which obviously affects the battery formation effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A conductive agent in the active material of a composite carbon extruded paste type positive electrode plate is a composite carbon material, including the following raw materials, 10 parts of acetylene black, and the apparent specific volume of acetylene black is 50 mL / g.

[0022] Soak acetylene black and acid in the raw material at a mass ratio of 1:2 for 1 hour, and dry at 65°C after soaking.

[0023] Add the dried acetylene black, graphite, and CMC to 88 parts of lead powder, and stir while adding. The stirring time is 3 minutes. Then add water and acid. During the stirring process, the temperature is 55°C, and the stirring time is 40 minutes. Density and paste state, the apparent density of the lead paste is 4.2g / cm 3 .

[0024] Then squeeze the lead paste into the paste extrusion tube under a pressure of 60kg. After the paste extrusion is completed, the positive electrode plate is cured and dried. The curing temperature is 45±5°C, the humidity is 70%, the time is ...

Embodiment 2

[0027] Conductive agent in a kind of composite carbon extruded paste formula positive growth plate active material is composite carbon material, comprises following raw material, 8 parts of acetylene black, 2 parts of graphite, CMC (sodium carboxymethyl cellulose) auxiliary agent, its content is 2 parts; the specific volume of acetylene black is 32mL / g, and the specific surface area of ​​graphite is 150m 2 / g.

[0028] Soak acetylene black and acid in the raw material at a mass ratio of 1:2 for 1 hour, and dry at 65°C after soaking.

[0029] Add the dried acetylene black to 90 parts of lead powder, stir while adding, and stir for 3 minutes, then add water and acid, the temperature is 55°C during the stirring process, and the stirring time is 35 minutes. After the stirring is completed, measure the apparent density and output of the lead paste State, lead paste apparent density 4.15g / cm 3 .

[0030] Then squeeze the lead paste into the paste extrusion tube under a pressure o...

Embodiment 3

[0033] A conductive agent in the active material of a composite carbon extruded paste type positive electrode plate is a composite carbon material, including the following raw materials, 8 parts of acetylene black, and 1 part of graphite. CMC (sodium carboxymethylcellulose) auxiliary agent, its content is 1 part; Acetylene black apparent specific volume is 35mL / g, and graphite specific surface area is 750m 2 / g.

[0034] Soak acetylene black and acid in the raw material at a mass ratio of 1:2 for 1 hour, and dry at 65°C after soaking.

[0035] Add the dried acetylene black, graphite, and CMC to 90 parts of lead powder, and stir while adding. The stirring time is 3 minutes. Then add water and acid. The temperature is 45°C during the stirring process. The stirring process adopts a high-speed stirring method, and the stirring time is 25 minutes. After the stirring is completed, measure the apparent density of the lead paste and the state of the paste, and the apparent density of...

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Abstract

The invention relates to a conductive agent in an active substance of a composite carbon paste extrusion type positive unformed plate and a preparation method of the positive unformed plate, and belongs to the technical field of power lead-acid storage batteries. The conductive agent in the active substance of the composite carbon paste extrusion type positive unformed plate comprises one or two of the following raw materials in parts by mass: 8-10 parts of acetylene black and 1-2 parts of graphite. The conductive agent in the active material of the composite carbon paste extrusion type positive unformed plate further comprises 1-2 parts by mass of a sodium carboxymethyl cellulose auxiliary agent. The conductive agent in the active substance of the composite carbon paste extrusion type positive unformed plate has excellent conductivity, so that the charging acceptance of the plate is improved; meanwhile, the invention provides a simple and convenient preparation method of the positive unformed plate.

Description

technical field [0001] The invention relates to a conductive agent in the active material of a composite carbon extruded paste type positive electrode plate and a preparation method of the positive electrode plate, belonging to the technical field of power lead-acid batteries. Background technique [0002] Power lead-acid batteries have many advantages and features, including better stability, lower cost, and longer battery life. Compared with the previous dry powder production method, the extruded paste plate can form a good network structure inside, which is more conducive to prolonging the service life of the battery. However, since the production of paste-extruded positive plates adopts a constant-pressure linkage extrusion method, the active material in the tube is relatively tight after extrusion, and polarization problems are prone to occur when the plate is formed, that is, due to the low porosity of the active material of the positive plate, the relative porosity is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/20H01M4/21
CPCH01M4/625H01M4/20H01M4/21Y02E60/10
Inventor 田雪杨会杰王刚李晶王银娟李云福牛少强张扬
Owner ZIBO TORCH ENERGY
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