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Surface coating for storage battery grid and preparation method of storage battery positive grid for deep circulation

A surface coating, battery technology, applied in battery electrodes, coatings, electrode carriers/current collectors, etc., can solve the problem that the improvement effect of maintenance-free sealed lead-acid batteries is not good enough, and improve charging acceptance and contact deterioration. Slow, prolonged cycle life effect

Active Publication Date: 2020-08-14
TIANNENG BATTERY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technical solution is not good enough to improve the "antimony-free effect" of deep-cycle maintenance-free sealed lead-acid batteries

Method used

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  • Surface coating for storage battery grid and preparation method of storage battery positive grid for deep circulation
  • Surface coating for storage battery grid and preparation method of storage battery positive grid for deep circulation
  • Surface coating for storage battery grid and preparation method of storage battery positive grid for deep circulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Lead-calcium alloy is used to cast the basic grid, and the specific composition is: by mass percentage, 0.08% Ca (calcium), 1.2% Sn (tin), 0.03% Al (aluminum), and the balance is Pb (lead). After the grid is cast, soak in a boric acid solution with a mass percentage of 1%, the solution temperature is 55±10°C, and the soaking time is 6s. Ultrasonic cleaning, using water-based cleaning agent, frequency 50KHz, cleaning temperature 40°C, cleaning time 5min, after cleaning, immerse in a mixed solution of antimony trioxide, tin oxide, bismuth oxide, saturated aqueous sodium silicate solution and sulfuric acid, of which three 1.8% by weight of antimony oxide, 0.2% by weight of tin oxide, 0.02% by weight of bismuth oxide, 6% by weight of saturated sodium silicate aqueous solution, and the balance is dilute sulfuric acid with a density of 1.45g / ml, mixed solution The temperature is 50°C, the immersion plating time is 30s, and high temperature aging is carried out after immersion...

Embodiment 2

[0038] Lead-calcium alloy is used to cast the basic grid, and the specific composition is: by mass percentage, 0.08% Ca (calcium), 1.2% Sn (tin), 0.03% Al (aluminum), and the balance is Pb (lead). After the grid is cast, soak in a boric acid solution with a mass percentage of 1.05%, the solution temperature is 55±10°C, and the soaking time is 3s. Ultrasonic cleaning, using water-based cleaning agent, frequency 90KHz, cleaning temperature 70°C, cleaning time 1min, after cleaning, immerse in a mixed solution of antimony trioxide, tin oxide, bismuth oxide, saturated aqueous sodium silicate solution and sulfuric acid. 0.45% by weight of antimony oxide, 0.05% by weight of tin oxide, 0.1% by weight of bismuth oxide, 4% by weight of saturated sodium silicate aqueous solution, and the balance is dilute sulfuric acid with a density of 1.08g / ml, mixed solution The temperature is 20°C, the immersion plating time is 120s, after immersion plating, high temperature aging is carried out, the...

Embodiment 3

[0046] Conduct the following tests:

[0047] 1. After the grid is made, use the electrochemical workstation to test the transfer resistance of the finished grid of Example 1, Example 2 and Comparative Example 1. The test results are as follows: figure 1 As shown: the grid transfer resistance of Comparative Example 1 is significantly higher than that of Example 1 and Example 2, which proves that the electrical properties of the grids treated in Examples 1 and 2 are significantly better than those of Comparative Example 1.

[0048] 2. Use the same lead paste, curing and drying process to make a positive plate of the same specification by using the same lead paste, curing and drying process to make a total of 5 kinds of finished grids in Examples 1 and 2, and Comparative Examples 1 to 3, and combine them with the same negative plate to make a 12V100Ah sample battery of the same specification. Carry out 30 times of 100% DOD cycle test, the specific test method: in the environment ...

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Abstract

The invention discloses a surface coating for a storage battery grid and a preparation method of a storage battery positive grid for deep circulation. The surface coating comprises the following components in percentage by weight: 0.45-1.8% of antimonous oxide; 0.05 to 0.2 percent of tin oxide; 0.02%-0.1% of bismuth oxide; 4-6% of a saturated sodium silicate aqueous solution; and the balance of dilute sulfuric acid with the density of 1.08-1.45 g / ml. The preparation method of the storage battery positive grid for deep circulation comprises the steps of grid casting, boric acid solution soakingafter grid casting, air showering and blow-drying, ultrasonic cleaning, surface coating soaking after cleaning, and aging treatment. The transfer resistance Rct of the finished grid is obviously reduced, less Pb (II) oxide is generated on the surface of alloy, and the conductivity of the grid and an active substance interface corrosion layer can be greatly improved; in the use process, the impedance of the grid and the active substance interface is obviously lower than that of a traditional lead-calcium alloy grid, the contact degradation of the grid and the active substance is slower, and the cycle service life of the battery is prolonged.

Description

technical field [0001] The invention relates to the preparation of a lead storage battery grid, in particular to a method for preparing a surface coating for a storage battery grid and a positive electrode grid for a deep cycle battery. Background technique [0002] The lead storage battery includes a battery tank, an electrode group and an electrolyte located in the battery tank. The electrode group includes a positive plate and a negative plate. The plate is composed of a grid and a lead paste coated on the grid. After the casting is completed, the grid , Generally, it needs to be treated by age hardening process, and then painted with lead paste. For example, the invention with the publication number CN103243284A discloses a high-temperature age hardening process for lead-calcium alloy grids, which includes the following steps: a) high-temperature recrystallization: place the cast-formed grid at a temperature of 75°C to 85°C, and the humidity Place it in an environment o...

Claims

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Application Information

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IPC IPC(8): H01M4/66H01M4/68H01M4/73H01M4/84B22D25/04C21D9/00C22C11/06C22F1/12C23C26/00
CPCB22D25/04C21D9/0068C22C11/06C22F1/12C23C26/00H01M4/667H01M4/685H01M4/73H01M4/84Y02E60/10
Inventor 刘克宇方明学王超庄建刘焯宋文龙洪清富
Owner TIANNENG BATTERY GROUP
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