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Test method for corrosion- resistance performance contrast of lead-acid battery grid

A technology of lead-acid batteries and testing methods, which is applied in the fields of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., which can solve problems such as multiple battery failure modes, grid corrosion, and inaccurate test results, and avoid test batches. Interval error, ensure accuracy, and improve accuracy

Inactive Publication Date: 2017-01-11
TIANNENG BATTERY GROUP
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Problems solved by technology

[0003] In the production process of the existing lead-acid battery, the most direct way to test the corrosion resistance of the grid is to assemble it into a battery for cycle life testing, but there are disadvantages: 1. The test time is long, at least 6 months; 2. Due to the many failure modes of the battery, the failure of the battery may not be caused by the corrosion of the grid. In addition, the failed battery cannot reflect the corrosion of the grid, so the test result is inaccurate
[0004] At present, lead-acid batteries are widely used in a wide range of fields. From the perspective of product failure modes, grid corrosion is one of the important reasons. In order to improve product performance, it is necessary to find a grid material that is suitable for supplying market demand, but there is currently no suitable method. Testing for the corrosion resistance of the grid material, which leads to blind production and increases the risk of return

Method used

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  • Test method for corrosion- resistance performance contrast of lead-acid battery grid

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Embodiment 1

[0033] 1. A comparative test method for the corrosion resistance of lead-acid battery grids, the specific scheme is as follows:

[0034] (1) Take two 6-DZM-20 grids A and B with different alloy compositions but the same production process, weigh and record the weight of a single piece. Put it into a boiled sugar-alkali solution (glucose: caustic soda: water = 1:5:50) for 10 minutes to remove surface oxides, take it out and soak it in pure water to clean it, and then dry it in a vacuum oven at 105°C for 30 minutes. The dried board The grid is weighed with an electronic balance, as the weight w of the positive grid 1A 、w 1B ;

[0035] (2) Take two A grids as positive (weighed w 1A ), the negative electrode is placed in a single corrosion device a, and the distance between the two grids is kept, and the two B grids are placed in a single corrosion device b in the same way, and the positive and negative electrodes of the corrosion devices a and b are connected in series to form...

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Abstract

The invention discloses a test method for corrosion-resistance performance contrast of a lead-acid battery grid, comprising the steps of (1) taking several kinds of grids, each for two pieces, soaked in the sugar alkali solution to remove surface oxide, weighing after cleaning & drying, records the weight of the monolithic grid under test, remembers as w1; (2) placing the grid under test respectively in the corresponding corrosion device containing sulfuric acid solution; (3) connecting all the corrosion device in series, and charged with constant current; (4) after the charge, takes out the grid under test which represents the anode, weighs after processing according to the method of step (1) , remembers as w2; (5) adopts the formula w = w1-W2 to calculate the corrosion loss weight for each grid under test, and compares the corrosion resistance performance of several kind of grids under test based on the quantities of w. The invention takes the grid weight of removing surface oxide layer as the initial weight, makes the last calculated corrosion loss weight more accurately to reflect the corrosion resistance performance of the grid under test.

Description

technical field [0001] The invention relates to the technical field of lead-acid storage battery manufacturing, in particular to a comparative test method for corrosion resistance performance of lead-acid storage battery grids. Background technique [0002] The lead-acid battery grid is mainly used to support active materials and current collectors, and the grid is composed of several transverse ribs, longitudinal ribs and frames. The corrosion resistance of the grid directly affects the charge and discharge performance, sealing performance and cycle life of the battery. The selected materials, different structures and production processes all affect the corrosion resistance of the grid. [0003] In the production process of the existing lead-acid battery, the most direct way to test the corrosion resistance of the grid is to assemble it into a battery for cycle life testing, but there are disadvantages: 1. The test time is long, at least 6 months; 2. Due to the many failu...

Claims

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Application Information

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IPC IPC(8): G01N17/00
CPCG01N17/00
Inventor 邓成智李桂发刘玉梅园孔春凤郭志刚陈跃武
Owner TIANNENG BATTERY GROUP
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