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A kind of preparation method of lead storage battery positive plate

A lead-acid battery, positive plate technology, applied in lead-acid battery electrodes, positive electrodes, active material electrodes, etc., can solve problems affecting industrial application, low reliability of tab casting, poor tab strength, etc. high-rate and high-rate discharge performance, improved high-current charge-discharge capacity, and uniform plate current distribution

Active Publication Date: 2021-11-30
TIANNENG BATTERY GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, there are the following problems in actual production: the pole plate cannot be thinned (the thickness of the foamed lead material is generally more than 6mm, and the thickness of the foamed lead grid prepared by the existing method is too thick), the battery rate performance of the prepared battery is not good, and the tab casting is reliable. Low performance (the lug strength is poor, prone to defects such as virtual welding and pores), and the method of casting the tab and the surrounding frame will greatly increase the amount of lead and the weight of the finished battery, which seriously affects its industrial application

Method used

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  • A kind of preparation method of lead storage battery positive plate
  • A kind of preparation method of lead storage battery positive plate

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Effect test

Embodiment 1

[0038] 1. Use lead foam material with a thickness of 5mm, a porosity of 95%, and a minimum pore diameter of 6mm. After 4 calendering, it is pressed to a thickness of 3.8mm, and punched into a grid lattice material with a length of 234mm and a width of 141mm.

[0039] Die-cast lead-tin alloy lugs and upper frames with a tin weight percentage of 1.8% in the width direction of the grid body. The thickness of the tabs is 4mm and the width is 18mm. The distance between the tabs and the edge of the grid body is 37.5mm. , equal to the length of the lattice body, 1mm higher than the lattice body in the width direction, and the size of the completed grid frame is 141mm wide, 235mm high, and 4mm thick.

[0040] 2. Lead paste components: lead powder 100kg, 1.4g / cm 3 4.13kg of dilute sulfuric acid, 19.3kg of deionized water, and 0.05kg of Teflon solution with a mass concentration of 30%.

[0041] Plate spraying, spray gun pressure 0.08MPa, finished plate size is 141mm wide, 235mm high, 4...

Embodiment 2

[0044] 1. Use lead foam material with a thickness of 8.5mm, a porosity of 90%, and a minimum pore diameter of 10mm. After 9 calendering, it is pressed to a thickness of 3.8mm, and punched into a grid lattice material with a length of 234mm and a width of 141mm.

[0045] Die-cast lead-tin alloy tabs and upper frames with a tin weight percentage of 30% in the width direction of the grid body. The tabs are 4mm thick and 18mm wide. The distance between the tabs and the edge of the grid body is 37.5mm, and the upper frame is 4mm thick and 4mm wide. , equal to the length of the lattice body, 1mm higher than the lattice body in the width direction, and the size of the completed grid frame is 141mm wide, 235mm high, and 4mm thick.

[0046] 2. Lead paste components: lead powder 100kg, 1.4g / cm 3 2.56kg of dilute sulfuric acid, 20.5kg of deionized water, and 0.1kg of Teflon solution with a mass concentration of 15%.

[0047] Plate spraying, spray gun pressure 0.04MPa, finished plate siz...

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Abstract

The invention discloses a method for preparing a positive plate of a lead storage battery, which belongs to the technical field of storage batteries. The preparation method includes: (1) die-cutting the foamed lead material after several passes of rolling to obtain a grid grid body, die-casting a lead-tin alloy along a wide side of the grid grid body to form an upper frame and tabs, and obtain Positive grid; (2) Spray low-acid or acid-free lead paste on the positive grid, and then soak in acid; (3) Take the plate out of the acid solution, cover the surface of the plate with coated paper, and place it in a stack for curing chamber solidification to obtain the positive plate of the lead storage battery. The present invention utilizes the foamed lead material with high porosity and large pore diameter to realize the thinning of the pole plate through multi-pass calendering. At the same time, the pore structure is richer and more complex, which can realize the spraying of low-acid and low-viscosity lead paste, and the current distribution of the pole plate is more uniform. Significantly improve the utilization rate of active materials and high-current charge and discharge capabilities; lamination curing can achieve low-temperature and low-humidity curing, reducing energy consumption and difficulty in process control of the curing process.

Description

technical field [0001] The invention relates to the technical field of storage batteries, in particular to a preparation method for a positive plate of a lead storage battery. Background technique [0002] Due to its mature technology, low price, large monomer capacity, and high safety, lead-acid batteries are widely used in communication, electric power, UPS power supply and other fields, and are currently the most used secondary batteries. [0003] Traditional communication, UPS backup power supply and other fields are mainly used for floating charging. The main failure mode of the battery under this use condition is corrosion of the positive grid. Electric energy storage and other fields are mainly used for recycling, and the main failure mode of the battery under this use condition is the softening and falling off of the positive electrode paste. [0004] In recent years, with the rise and rapid development of the Internet and e-commerce, IDC equipment rooms have been g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/73H01M4/20
CPCH01M4/20H01M4/73H01M2004/028Y02E60/10
Inventor 刘克宇方明学庄建王超宋文龙洪清富
Owner TIANNENG BATTERY GROUP
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