CN104101566A - Device and method for quickly testing decay resistance of lead alloy grid - Google Patents
Device and method for quickly testing decay resistance of lead alloy grid Download PDFInfo
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- CN104101566A CN104101566A CN201410304351.1A CN201410304351A CN104101566A CN 104101566 A CN104101566 A CN 104101566A CN 201410304351 A CN201410304351 A CN 201410304351A CN 104101566 A CN104101566 A CN 104101566A
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Abstract
The invention discloses a device and a method for quickly testing the decay resistance of a lead alloy grid. The device comprises an electrolysis bath filled with an electrolyte, and further comprises a charge-discharge machine capable of realizing constant-current and constant-voltage charging and discharging, wherein a pure lead plate which is the same as a grid to be measured in both area and size is arranged at one end inside the electrolysis bath; the other end in the electrolysis bath is a to-be-tested grid accommodating position; a fixed pulley is arranged above the to-be-tested grid accommodating position; a pull rope passes through the fixed pulley; a balancing weight is hung at one end of the pull rope, and the other end of the pull rope is hung down and straightly pulled to be positioned in the top center of the to-be-tested grid; during test, the positive pole and the negative pole of the charge-discharge machine are respectively connected with the to-be-tested grid and the pure lead plate to form a test loop.
Description
Technical field
The present invention relates to lead accumulator field, be specifically related to a kind of devices and methods therefor of Fast Measurement lead alloy grid decay resistance.
Background technology
Grid is the collector of accumulator, is also the skeleton of active substance of battery; As most important non-active ingredient in lead accumulator, the decay resistance of grid is to having very important significance the serviceable life of accumulator.Aspect the decay resistance test of grid alloy, traditional method mainly contains following two kinds: the one, and adopt continuous current or constant voltage method to corrode grid alloy, before and after corroding by calculating, grid weight characterizes the decay resistance of alloy; The 2nd, adopt novel alloy to prepare battery, characterize the decay resistance of alloy by measuring the method for battery cycle life.Adopt first method while measuring, the test duration is about 20-30 days, but due to the forms of corrosion difference of different-alloy, result difference when its net result and battery truly move is larger; While adopting second method to measure, data result is accurate, but it is longer to expend time in, and generally needs more than 4 months.
For solving long problem detection time, prior art is first carried out constant current corrosion to board under test grid, after it produces certain thickness corrosion layer, then corrodes by charge and discharge cycles, make institute's measurement result closer to the true ruuning situation of battery, and greatly shortened the test duration.While adopting said method speed to measure accumulator plate grid alloy decay resistance, if the crystal particle dimension difference of different-alloy is little, can ensure the accurate of measurement result; If the crystal particle dimension difference of different-alloy is larger, measurement result difference is also larger or completely contrary.Because the corrosion of accumulator plate grid alloy is mainly grain boundary corrosion, along with corrosion aggravation, cause grid to rupture along grain boundaries, finally lose conductive capability.If alloy grain is thin, the total area of crystal boundary is just large, when same current is corroded, larger compared to its weightless total amount of coarse grain, but the corrosion depth of crystal boundary is relatively shallow; And the thicker alloy of crystal grain, the crystal boundary total area is less, and when identical corrosion weight loss amount, the corrosion depth of its crystal boundary is much larger than fine-grained alloy, thereby causes the inaccurate of measurement result.
prior art comparative example 1
Two kinds of different-alloy grids are weighed, grid A alloy (mass percent): Ca 0.08%, Sn 1.2%, Al 0.03%, all the other are plumbous, average grain size is greater than 150 μ m.Grid B alloy (mass percent): Ca 0.08%, Sn 1.2%, Al 0.03%, rare earth metal a%, all the other are plumbous, average grain size is less than 10 μ m.
The weight of grid A is 10.6g, the weight of grid B is 10.5g, respectively taking grid A, B as anodal, with grid A, B pure stereotype of the same area as negative pole, composition electrolysis loop, connects wire, put into electrolytic tank, in electrolytic tank, add the sulfuric acid solution of 1.25g/mL, make a little higher than grid of its liquid level top, electrolytic tank is positioned in the constant water bath box of 45 DEG C, then electrolysis loop is received on the charge-discharge machine that can carry out constant current and constant voltage charge and discharge, first with constant current density 60mA/cm
2corrode 3 days, then carry out charge and discharge cycles with following steps: I. constant current density 40mA/cm
2charging 2min; II. leave standstill 10s; III. constant current density 60mA/cm
2be discharged to monomer voltage 0.6V; IV. leave standstill 10s; Repeating step I～IV, circulates 15 days.
After above-mentioned corrosion finishes, anode plate grid is taken off, be placed in the sugared aqueous slkali boiling and soak, corrosion product is peeled off, wherein sugared aqueous slkali is the mixed solution of glucose, NaOH and distilled water, glucose in mixed solution: NaOH: the weight ratio of distilled water is 1:5:50.
Anode plate grid after finally corrosion product being peeled off is dried, weighs, and claims to such an extent that the weight of grid A is 8.3g, and the weight of grid B is 8.1g, and the corrosion weight loss of grid A is: 10.6g-8.3g=2.3g, and corrosion weight loss rate is: 2.3g ÷ 10.6g=21.9%;
The corrosion weight loss of B is: 10.5g-8.1g=2.4g, corrosion weight loss rate is: 2.4g ÷ 10.5g=22.8%.
The corrosion resistance that adopts said method to record B is slightly worse than A.
prior art comparative example 2
In this comparative example, with grid A, B in prior art comparative example, carry out battery and truly move test.Truly move test by battery, while adopting battery 100%DOD circulation prepared by grid A 300 times, dissect and find anode plate grid heavy corrosion; And while adopting battery 100%DOD circulation prepared by B 300 times, dissect and find that anode plate grid corrosion is less.Illustrate that prior art comparative example 1 test result and truth are not inconsistent.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of devices and methods therefor of Fast Measurement lead alloy grid decay resistance, utilize this devices and methods therefor to measure accumulator plate grid alloy decay resistance, not only test speed is fast, and accurately, reliably, during with battery actual motion, corrosion condition is consistent for test result.
The present invention is achieved through the following technical solutions:
A kind of device of Fast Measurement lead alloy grid decay resistance, comprise the electrolytic tank that fills electrolytic solution, also comprise the charge-discharge machine that can carry out constant current and constant voltage charge and discharge, one end in described electrolytic tank is provided with pure stereotype identical with grid area to be measured, consistent size, the other end in electrolytic tank is grid placement location to be measured, the top of described grid placement location to be measured is provided with fixed pulley, stay cord is through fixed pulley, one end of described stay cord is hung with balancing weight, and the other end is sagging is positioned at grid center of top to be measured after stretching; When test, the positive and negative electrode of the described charge-discharge machine formation test loop that is connected with grid to be measured, pure stereotype respectively.
The liquid level of described electrolytic tank electrolyte inside is a little more than grid to be measured, pure stereotype height.
Concentration of electrolyte in described electrolytic tank is 1.10～1.30g/mL sulfuric acid solution.
Described electrolytic tank is positioned in the constant water bath box of 25～60 DEG C.
Bottom in described electrolytic tank and the holding frame that is respectively equipped with grid to be measured, pure stereotype suitable for reading.Bottom in electrolytic tank is the fishback that is adhered to bottom of electrolytic tank for the holding frame of grid to be measured, and when test, broach inserts grid to be measured lower end and fixes.
The weight of described balancing weight is 40-60 times of grid weight to be measured.If balancing weight is lightweight, although grid corrodes, the time of breaking is longer, and testing efficiency is low, and therefore, the weight of balancing weight should, being held in proper range, can not be broken the grid also not corroding.
The method of measuring lead alloy grid decay resistance with above-mentioned device, comprises the following steps:
1) holding frame that grid to be measured is inserted from the top down to electrolytic tank is fixed, and stay cord is lain in grid top-portion apertures to be measured; In electrolytic tank, adding concentration is 1.10～1.30g/mL sulfuric acid solution, makes the liquid level of electrolytic solution a little more than the top of grid to be measured, then electrolytic tank is placed in the constant water bath box of 25～60 DEG C;
2) charging procedure of unlatching charge-discharge machine, with constant current density 10～100mA/cm
2to test loop charging 2-5 days;
3) regulate charge-discharge machine with constant current density 10～100mA/cm
2to test loop charging, then 2min leaves standstill 10s;
4) regulate charge-discharge machine with constant current density 10～80mA/cm
2test loop is carried out to discharge operation, and being discharged to loop voltage is after 0.6V, to leave standstill 10s;
5) unlimited circulation step 3,4 is until grid to be measured disconnects under the pulling of balancing weight, and recording step 2 starts the time spent in the time that step 5 finishes.
Preferably, the constant current density 60mA/cm in step 3
2.
Preferably, the constant current density 40mA/cm in step 4
2.
The present invention compared with prior art has the following advantages:
In the present invention, first adopt constant current density corrosion 2～5 days, make alloy surface produce certain thickness corrosion layer, pass through again charge and discharge cycles, make grid produce certain thickness sulfuric acid salt deposit, the sulfuric acid salt deposit producing can make the pH value of alloy corrosion layer inside change on the one hand, makes forms of corrosion be different from simple continuous current corrosion; By balancing weight, grid is applied to certain pulling force on the other hand, accelerate grain boundary corrosion, also more approach the use procedure of grid, make test result more accurate, during for the larger grid of different beta alloy crystal particle dimension differences, ensureing that test simultaneously accurately, can significantly shorten the test duration.
Test grid is applied to pulling force, can accelerate the degree of depth of grain boundary corrosion, thereby accelerate not corrosion resistant grid fracture.(studies show that, in use, because the expansion of lead plaster, grid can bear certain pulling force to battery.）
For example: if alloy 1 crystallite dimension is 10 units, the crystallite dimension of alloy 2 is 100 units, that, under identical corroded area, the crystal boundary total area of alloy 1 is 100, the crystal boundary total area of alloy 2 is exactly 10.While applying identical corrosion electric weight (electric current and time are all identical), the corrosion depth of alloy 2 is 10 times of alloy 1 certainly, and so, alloy 2 first disconnects certainly.
Brief description of the drawings
Fig. 1 is invention structural representation.
1 electrolytic tank; 2 electrolytic solution; 3 anodal wiring; 4 negative pole wiring; 5 constant water bath box; 6 holding frames; 7 fixed pulleys; 8 balancing weights.
Embodiment
embodiment 1
Grid to be tested with the grid A in prior art comparative example 1 as the present embodiment.
The holding frame that grid A to be measured is inserted to electrolytic tank is from the top down fixed and (is bonded in the broach of the fishback of bottom of electrolytic tank, insert in the grate opening of grid A to be measured bottom and be connected and fixed), stay cord is hung to 500 g balancing weights, and the stay cord other end lies in grid top gate checkerwork cell to be measured; By the positive and negative electrode of the charge-discharge machine formation test loop that is connected with grid A to be measured, pure stereotype respectively; In electrolytic tank, adding concentration is 1.25 g/mL sulfuric acid solutions, makes the liquid level of electrolytic solution a little more than the top of grid to be measured, pure stereotype (lug exposes liquid level, is convenient to be connected with wire), electrolytic tank is placed in the constant water bath box of 45 DEG C;
2) charging procedure of unlatching charge-discharge machine, with constant current density 60mA/cm
2to test loop charging 3 days;
3) regulate charge-discharge machine with constant current density 60mA/cm
2to test loop charging, then 2min leaves standstill 10s;
4) regulate charge-discharge machine with constant current density 40mA/cm
2test loop is carried out to discharge operation, and being discharged to loop voltage is after 0.6V, to leave standstill 10s;
5) unlimited circulation step 3,4, until grid A to be measured disconnects under the pulling of balancing weight, it is 12 days that recording step 2 starts the time spent in the time that step 5 finishes.
embodiment 2
Grid to be measured with the grid B in prior art comparative example 1 as the present embodiment.
5) step 3,4 in unlimited circulation embodiment 1, until grid B to be measured disconnects under the pulling of balancing weight, recording step 2) to start the spent time in the time that step 5) finishes be 20 days.All the other are implemented as embodiment 1.
From above-described embodiment one and embodiment bis-, grid A to be measured, B are from step 2) start the time spent in the time that step 5) finishes, the corrosion resistance of known grid B to be measured is better than grid A to be measured.This test result is compared with the prior art the truth that example 2 obtains and conforms to.
embodiment 3
1) in electrolytic tank, adding sulfuric acid solution concentration is that then 1.10g/mL is placed on electrolytic tank in the constant water bath box of 25 DEG C; 2) with constant current density 60mA/cm
22 days; 3) regulate charge-discharge machine with constant current density 10mA/cm
2carry out charging operations, after charging 2min, leave standstill 10s; 4) regulate charge-discharge machine with constant current density 10mA/cm
2carry out discharge operation, be discharged to and leave standstill 10s after monomer voltage 0.6V; Unlimited circulation step 3), 4) until grid disconnects under the pulling of balancing weight, start grid A to be measured in the time that step 5 finishes from step 2 and expend 50 days, grid B to be measured expends 95 days.All the other are implemented as embodiment mono-.
The corrosion resistance that draws grid B to be measured is better than grid A to be measured.
embodiment 4
1) in electrolytic tank, adding sulfuric acid solution concentration is that then 1.30g/mL is placed on electrolytic tank in the constant water bath box of 60 DEG C; 2) with constant current density 60mA/cm
25 days; 3) regulate charge-discharge machine with constant current density 100mA/cm
2carry out charging operations, after charging 2min, leave standstill 10s; 4) regulate charge-discharge machine with constant current density 80mA/cm
2carry out discharge operation, be discharged to and leave standstill 10s after monomer voltage 0.6V; Unlimited circulation step 3), 4) until grid disconnects under the pulling of balancing weight, start grid A to be measured in the time that step 5 finishes from step 2 and expend 5 days, grid B to be measured expends 12 days.All the other are implemented as embodiment mono-.
The corrosion resistance that draws grid B to be measured is better than grid A to be measured.
Claims (10)
1. the device of a Fast Measurement lead alloy grid decay resistance, it is characterized in that: comprise the electrolytic tank that fills electrolytic solution, also comprise the charge-discharge machine that can carry out constant current and constant voltage charge and discharge, one end in described electrolytic tank is provided with pure stereotype identical with grid area to be measured, consistent size, the other end in electrolytic tank is grid placement location to be measured, the top of described grid placement location to be measured is provided with fixed pulley, stay cord is through fixed pulley, one end of described stay cord is hung with balancing weight, and the other end is sagging is positioned at grid center of top to be measured after stretching; When test, the positive and negative electrode of the described charge-discharge machine formation test loop that is connected with grid to be measured, pure stereotype respectively.
2. the device of a kind of Fast Measurement lead alloy grid decay resistance as claimed in claim 1, is characterized in that: the liquid level of electrolytic tank electrolyte inside is a little more than grid to be measured, pure stereotype height.
3. the device of a kind of Fast Measurement lead alloy grid decay resistance as claimed in claim 1, is characterized in that: the concentration of electrolyte in described electrolytic tank is 1.10～1.30g/mL sulfuric acid solution.
4. the device of a kind of Fast Measurement lead alloy grid decay resistance as claimed in claim 1, is characterized in that: described electrolytic tank is positioned in the constant water bath box of 25～60 DEG C.
5. the device of a kind of Fast Measurement lead alloy grid decay resistance as claimed in claim 1, is characterized in that: the bottom in described electrolytic tank and the holding frame that is respectively equipped with grid to be measured, pure stereotype suitable for reading.
6. the device of a kind of Fast Measurement lead alloy grid decay resistance as claimed in claim 5, it is characterized in that: the bottom in electrolytic tank is the fishback that is adhered to bottom of electrolytic tank for the holding frame of grid to be measured, when test, broach inserts grid to be measured lower end and fixes.
7. the device of a kind of Fast Measurement lead alloy grid decay resistance as claimed in claim 1, is characterized in that: the weight of described balancing weight is 40-60 times of grid weight to be measured.
8. utilize device described in claim 1 to 7 any one to measure the method for lead alloy grid decay resistance, its feature comprises the following steps:
1) holding frame that grid to be measured is inserted from the top down to electrolytic tank is fixed, and stay cord is lain in grid top-portion apertures to be measured; In electrolytic tank, adding concentration is 1.10～1.30g/mL sulfuric acid solution, makes the liquid level of electrolytic solution a little more than the top of grid to be measured, then electrolytic tank is placed in the constant water bath box of 25～60 DEG C;
2) charging procedure of unlatching charge-discharge machine, with constant current density 10～100mA/cm
2to test loop charging 2-5 days;
3) regulate charge-discharge machine with constant current density 10～100mA/cm
2to test loop charging, then 2min leaves standstill 10s;
4) regulate charge-discharge machine with constant current density 10～80mA/cm
2test loop is carried out to discharge operation, and being discharged to loop voltage is after 0.6V, to leave standstill 10s;
5) unlimited circulation step 3,4 is until grid to be measured disconnects under the pulling of balancing weight, and recording step 2 starts the time spent in the time that step 5 finishes.
9. the method for measuring as claimed in claim 7 lead alloy grid decay resistance, is characterized in that: the constant current density 60mA/cm in step 3
2.
10. the method for measuring as claimed in claim 7 lead alloy grid decay resistance, is characterized in that: the constant current density 40mA/cm in step 4
2.
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| CN201410304351.1A CN104101566A (en) | 2014-08-12 | 2014-08-12 | Device and method for quickly testing decay resistance of lead alloy grid |
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Cited By (6)
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| CN104697923A (en) * | 2015-03-12 | 2015-06-10 | 广东电网有限责任公司电力科学研究院 | Method for detecting corrosion resistance of bus-bar alloy of lead-acid storage battery |
| CN109765173A (en) * | 2019-01-16 | 2019-05-17 | 肇庆理士电源技术有限公司 | The method for rapidly testing of grid corrosion resistance |
| CN110346176A (en) * | 2019-06-28 | 2019-10-18 | 江苏大成航空科技有限公司 | A kind of double grab types layering mud sampling apparatus based on unmanned boat |
| CN111579474A (en) * | 2020-05-07 | 2020-08-25 | 超威电源集团有限公司 | Device and method for testing corrosion resistance of lead-acid storage battery grid alloy |
| CN113008775A (en) * | 2021-03-16 | 2021-06-22 | 天能集团（河南）能源科技有限公司 | Device and method for testing corrosion resistance of lead-acid storage battery grid alloy |
| CN114112276A (en) * | 2021-09-14 | 2022-03-01 | 超威电源集团有限公司 | Method for evaluating performance of storage battery green plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697923A (en) * | 2015-03-12 | 2015-06-10 | 广东电网有限责任公司电力科学研究院 | Method for detecting corrosion resistance of bus-bar alloy of lead-acid storage battery |
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| CN111579474A (en) * | 2020-05-07 | 2020-08-25 | 超威电源集团有限公司 | Device and method for testing corrosion resistance of lead-acid storage battery grid alloy |
| CN113008775A (en) * | 2021-03-16 | 2021-06-22 | 天能集团（河南）能源科技有限公司 | Device and method for testing corrosion resistance of lead-acid storage battery grid alloy |
| CN113008775B (en) * | 2021-03-16 | 2023-03-14 | 天能集团（河南）能源科技有限公司 | Device and method for testing corrosion resistance of lead-acid storage battery grid alloy |
| CN114112276A (en) * | 2021-09-14 | 2022-03-01 | 超威电源集团有限公司 | Method for evaluating performance of storage battery green plate |
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Application publication date: 20141015 |