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A battery polar plate lead paste formula and a preparation method for the battery polar plate

A battery and plate technology, applied in lead-acid battery electrodes, battery electrodes, circuits, etc., can solve the problems of uneven surface of the plate, uneven composition of lead paste, loss of function, etc., so as to delay softening and shedding, improve physical Bonding strength, the effect of preventing the lead paste from falling off

Active Publication Date: 2020-12-25
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also certain problems in the use of the above-mentioned fibers in lead-acid batteries, such as uneven composition of the lead paste or uneven surface of the plate due to the easy agglomeration of the fibers; The pieces fall off, once the plate is assembled into a battery, its function will be completely lost

Method used

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  • A battery polar plate lead paste formula and a preparation method for the battery polar plate
  • A battery polar plate lead paste formula and a preparation method for the battery polar plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Positive plate: add red lead of 5% lead powder weight, 0.1% antimony trioxide and 0.2% graphite when making paste; add water-soluble PVA fiber (fineness is 0.3dtex, length 4mm, water The dissolution temperature is 65°C).

[0031] When mixing the paste, put the lead powder and the above formula into the paste mixing machine at the same time, turn on the paste mixing machine and dry mix for 3 minutes; then quickly add pure water with 12% of the weight of the lead powder, and then wet mix for 5 minutes; slowly add the lead powder by weight Dilute sulfuric acid with a concentration of 8% by weight and 50% concentration, add acid at a constant speed while stirring, control the acid addition time for 13 minutes, and turn on the air cooling and water cooling of the paste mixing machine at the same time when the temperature of the lead paste reaches 50°C to ensure the paste process The highest temperature is 60°C±2°C; after the addition of acid, continue to stir for 12 minutes ...

Embodiment 2

[0038] Positive plate: add red lead of 5% lead powder weight, 0.1% antimony trioxide and 0.2% graphite when mixing paste; add water-soluble PVA fiber (fineness is 1.0dtex, length 2mm, water The dissolution temperature is 75°C).

[0039] When mixing the paste, put the lead powder and the above formula into the paste mixing machine at the same time, turn on the paste mixing machine and dry mix for 3 minutes; then quickly add pure water with 12% of the weight of the lead powder, and then wet mix for 5 minutes; slowly add the lead powder by weight Dilute sulfuric acid with a concentration of 8% by weight and 50% concentration, add acid at a constant speed while stirring, control the acid addition time for 13 minutes, and turn on the air cooling and water cooling of the paste mixing machine at the same time when the temperature of the lead paste reaches 60°C to ensure the paste process The highest temperature is 68°C±2°C; after the addition of acid, continue to stir for 12 minutes ...

Embodiment 3

[0046] Positive plate: add red lead of 5% lead powder weight, 0.1% antimony trioxide and 0.2% graphite when paste; add water-soluble PVA fiber (fineness is 2.0dtex, length 6mm, water The dissolution temperature is 95°C).

[0047] When mixing the paste, put the lead powder and the above formula into the paste mixing machine at the same time, turn on the paste mixing machine and dry mix for 3 minutes; then quickly add pure water with 12% of the weight of the lead powder, and then wet mix for 5 minutes; slowly add the lead powder by weight Dilute sulfuric acid with a concentration of 8% by weight and 50% concentration, add acid at a constant speed while stirring, control the acid addition time for 13 minutes, and turn on the air cooling and water cooling of the paste mixing machine at the same time when the temperature of the lead paste reaches 60°C to ensure the paste process The highest temperature is 68°C±2°C; after the addition of acid, continue to stir for 12 minutes and the...

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Abstract

The invention discloses a battery electrode plate lead paste formula and a preparation method of a battery electrode plate. The battery electrode plate lead paste formula comprises lead powders and an additive. The additive comprises water-soluble polyvinyl alcohol fibers. The additive amount of the water-soluble polyvinyl alcohol fibers accounts for 0.05% to 0.5% of the lead powders according to mass percentage. The battery electrode plate lead paste formula, by adding the water-soluble polyvinyl alcohol fibers, maintains a fiber state during the stirring and the coating process and improves the bonding strength between the active materials. In the initial stage of curing, the water-soluble polyvinyl alcohol fibers dissolve to forming uniformly distributed pores. As the curing progresses, the water content of the electrode plates decreases, and the PVA emulsion in the electrode plate lead paste begins to dry and coagulate so as to form a firm reticular cross-linked polymeric structure in the lead paste, thereby greatly enhancing the bonding strength of the lead paste, retarding the softening and peeling progress of the active material for the positive electrode plate, and prolonging the cycle life. The charge acceptance performance and high-rate discharge performance of the electrode plate are improved.

Description

technical field [0001] The invention relates to the technical field of lead storage batteries, in particular to a formula of lead paste for storage battery polar plates and a preparation method for storage battery polar plates. Background technique [0002] In the production process of the lead-acid battery plate, in order to increase the strength of the plate and enhance the bonding strength between the active materials, acid-resistant organic fibers accounting for 0.05% to 0.2% of the mass of the lead powder are generally added to the lead powder when mixing the paste. Its materials include polyester, polypropylene, etc. It is characterized by high tensile strength, acid resistance, high temperature resistance, and good chemical stability, so that it can exist stably when it is cured with paste or even used in batteries, thereby reducing the cost of the plate in the subsequent processing process. loss rate in . However, there are also certain problems in the use of the ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/20H01M4/21H01M4/56H01M4/62
CPCH01M4/20H01M4/21H01M4/56H01M4/627Y02E60/10
Inventor 代飞刘青方明学高根芳姚秋实胡曙汤序锋张涛
Owner TIANNENG BATTERY GROUP
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