CN111579474A - Device and method for testing corrosion resistance of lead-acid storage battery grid alloy - Google Patents
Device and method for testing corrosion resistance of lead-acid storage battery grid alloy Download PDFInfo
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- CN111579474A CN111579474A CN202010375532.9A CN202010375532A CN111579474A CN 111579474 A CN111579474 A CN 111579474A CN 202010375532 A CN202010375532 A CN 202010375532A CN 111579474 A CN111579474 A CN 111579474A
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- 238000005260 corrosion Methods 0.000 title claims abstract description 47
- 230000007797 corrosion Effects 0.000 title claims abstract description 47
- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 239000001999 grid alloy Substances 0.000 title claims abstract description 30
- 239000002253 acid Substances 0.000 title claims abstract description 28
- 238000003860 storage Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 238000005192 partition Methods 0.000 claims abstract description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 12
- 238000005303 weighing Methods 0.000 claims description 6
- 239000003792 electrolyte Substances 0.000 claims description 4
- 230000004580 weight loss Effects 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000005868 electrolysis reaction Methods 0.000 claims description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
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Abstract
A device and a method for testing corrosion resistance of a lead-acid storage battery grid alloy belong to the technical field of lead-acid storage batteries. The testing device is used for testing the grid to be tested and comprises an electrolytic bath for accommodating the grid to be tested, the grid to be tested arranged in the electrolytic bath, electrode grids arranged on two sides of the grid to be tested, a partition plate arranged between the electrode grids and the grid to be tested, a first lead connected out from a lug of the grid to be tested, a second lead connected out from lug positions of the two electrode grids in parallel, a charging and discharging machine electrically connected with the first lead and the second lead, a force equalizing line and a force equalizing rod arranged on the side edge of the grid to be tested, a pull rope connected with the force equalizing rod, and a heavy object connected with the pull rope through a guide wheel assembly. The invention can effectively test the corrosion condition of the grid under the stress condition so as to screen the grid alloy formula with better corrosion resistance.
Description
Technical Field
The invention relates to the technical field of lead-acid storage batteries, in particular to a device and a method for testing corrosion resistance of a grid alloy of a lead-acid storage battery.
Background
The lead-acid storage battery is taken as the most commonly used battery for the electric vehicle in the current market, has the advantages of extremely high market share, low price, good safety performance and high cost performance, and is favored by more and more users.
Lead-acid storage batteries used for electric bicycles have higher and higher performance requirements, and various battery manufacturers aim to prolong the service life of the products. At present, the main factor influencing the service life performance of lead-acid storage battery products is the corrosion resistance of grid alloys, and particularly, the corrosion is more serious under the condition of stress. When the positive plate is charged and discharged by the battery, the volume of the lead paste can be alternately changed by shrinkage and expansion, and the battery adopts a tight assembly mode, so that the change of the volume of the lead paste is mainly reflected in the length and width directions of the grid, the positive grid is subjected to stress while being corroded, and the corrosion in the state can cause the decline of the performance of the lead-acid storage battery if the positive grid is broken, and finally the service life of the whole battery pack is stopped.
At present, no device and method for detecting corrosion performance of the grid under the action of stress exist in the industry, and theoretical basis and experimental methods are provided for screening a good positive grid alloy formula.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a device and a method for testing the corrosion resistance of a lead-acid storage battery grid alloy, which can effectively test the corrosion condition of a grid under a stress condition so as to screen a grid alloy formula with better corrosion resistance.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a lead acid battery grid alloy corrosion resistance testing arrangement for test grid that awaits measuring, including the electrolysis trough of holding grid that awaits measuring, locate the electrode grid of the grid both sides that awaits measuring, locate the baffle between electrode grid and the grid that awaits measuring, the first lead wire of connecing out from the utmost point ear department of the grid that awaits measuring, the second lead wire of parallelly connected out from the utmost point ear department of two electrode grids, the charging and discharging machine of being connected with first lead wire and second lead wire electricity, locate average line and the average pole of the grid side that awaits measuring, the stay cord of connecting the average pole, the heavy object of connecting the stay cord through the guide wheel subassembly.
The stress environment of the grid in the use process is simulated through the force equalizing line, the force equalizing rod, the pull rope, the guide wheel assembly and the weight, so that the corrosion condition of the grid under the stress condition is effectively tested, and the grid alloy formula with better corrosion resistance is screened. The uniform force line means a line which enables all parts on the same side edge of the grid to be stressed uniformly; the force-equalizing rod means a rod which enables all parts of the force-equalizing wire to be stressed uniformly and is used for connecting the force-equalizing wire with the pull rope; and the heavy object is under the guide effect of guide pulley subassembly to the stay cord, turns into the pulling force of perpendicular to grid side direction with its vertical direction's gravity, and this pulling force is stable effective for a long time, and need not the energy consumption.
Preferably, the force-equalizing line is a line uniformly wound on the grid to be tested and the force-equalizing rod. The uniform force line is simple in structure and convenient to use, and the uniform force line and the uniform force rod can work effectively as long as the stay cord is perpendicular to the side edge of the grid.
Preferably, the pull ropes connected with the force equalizing rods on the opposite sides of the grid to be tested are connected to the same heavy object through the guide wheel assembly. In order to ensure that the opposite sides of the grid are stressed evenly and simplify the whole testing device, the pull ropes on the opposite sides can be connected to the same heavy object through the guiding action of the guide wheel assembly.
Preferably, the weight of the stress-equalizing rod connected along the length direction of the plate grid to be measured is 20-30 times of the sum of the weight of the frame and the weight of the ribs in the length direction of the plate grid to be measured. The weight of the weight is correspondingly lower compared to the lower strength of the grid sides in the width direction.
Preferably, the weight of the stress-equalizing rod connected along the width direction of the plate grid to be measured is 30-50 times of the sum of the weight of the frame and the weight of the ribs in the width direction of the plate grid to be measured. Compared with the grid side edge strength in the length direction, the grid side edge strength is higher, and the weight of the heavy object is correspondingly higher.
Preferably, the force-equalizing rod is connected with two pull ropes which are uniformly distributed. The two pull ropes can ensure even force distribution applied to the force-equalizing rod.
Preferably, the first lead and the second lead are externally provided with corrosion-resistant layers. And the lead is prevented from being corroded in the test process.
Preferably, the length and the width of the partition are both greater than those of the grid to be tested. So that the separator completely covers the grid to be tested, and the short circuit caused by the contact between the grid to be tested and the electrode grid is avoided.
The invention also provides a method for testing the corrosion resistance of the lead-acid storage battery grid alloy, which adopts the device for testing the corrosion resistance of the lead-acid storage battery grid alloy, and the testing method comprises the following steps:
step 1, integrally weighing the grid to be measured and the first lead, and measuring the size of the grid to be measured;
Preferably, the electrolyte in the electrolytic cell adopts the density of 1.1-1.4g/cm3The current discharged by the charge and discharge machine is 1-5A, and the discharge time is 120-216 h.
The invention has the advantages that:
1. the corrosion condition of the grids with different alloy formulas under a stress condition can be effectively tested, so that the grid alloy formula with better corrosion resistance can be screened conveniently.
2. The whole testing device is simple in structure, convenient to test and reliable in testing result.
Drawings
FIG. 1 is a top view of one embodiment of the present invention;
FIG. 2 is a side view of one embodiment of the present invention;
fig. 3 is a schematic diagram of a pole group structure according to an embodiment of the invention.
1-an electrolytic cell; 2-a grid to be tested; 3-an electrode grid; 4-a separator; 5-a first lead; 6-a second lead; 7-force-equalizing line; 8-a force-equalizing rod; 9-pulling a rope; 10-weight; 11-a splint; 12-bolt.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The utility model provides a lead acid battery grid alloy corrosion resistance testing arrangement for test grid 2 that awaits measuring, including the electrolysis trough 1 of holding grid 2 that awaits measuring, locate the electrode grid 3 of 2 both sides of grid that awaits measuring, locate the baffle 4 between electrode grid 3 and the grid 2 that awaits measuring, the first lead wire 5 that connects out from the utmost point ear department of grid 2 that awaits measuring, the second lead wire 6 that connects out from the utmost point ear department of two electrode grids 3 parallelly connected, the charging and discharging machine of being connected with first lead wire 5 and second lead wire 6 electricity, locate the average power line 7 and the average power pole 8 of 2 sides of grid that awaits measuring, the stay cord 9 of connecting average power pole 8, the heavy object 10 of connecting stay cord 9 through the guide pulley subassembly. Wherein, the grid 2 to be tested and the two electrode grids 3 are fixed in the electrolytic bath through the clamping plate 11 and the bolt 12.
The stress environment of the grid in the use process is simulated through the force-equalizing line 7, the force-equalizing rod 8, the pull rope 9, the guide wheel assembly and the weight 10, so that the corrosion condition of the grid under the stress condition is effectively tested, and a grid alloy formula with better corrosion resistance is screened. The uniform force line means a line which enables all parts on the same side edge of the grid to be stressed uniformly; the force-equalizing rod means a rod which enables all parts of the force-equalizing wire to be stressed uniformly and is used for connecting the force-equalizing wire with the pull rope; and the heavy object is under the guide effect of guide pulley subassembly to the stay cord, turns into the pulling force of perpendicular to grid side direction with its vertical direction's gravity, and this pulling force is stable effective for a long time, and need not the energy consumption.
Specifically, the force-equalizing line 7 is a line uniformly wound on the grid 2 to be tested and the force-equalizing rod 8. The uniform force line is simple in structure and convenient to use, and the uniform force line and the uniform force rod can work effectively as long as the stay cord is perpendicular to the side edge of the grid.
In addition, the pull ropes connected with the force equalizing rods on the opposite sides of the grid 2 to be tested are connected to the same heavy object through the guide wheel assemblies. In order to ensure that the opposite sides of the grid are stressed evenly and simplify the whole testing device, the pull ropes on the opposite sides can be connected to the same heavy object through the guiding action of the guide wheel assembly. As a preferable mode of the guide wheel assembly, as shown in fig. 1 and 2, the grid sides opposite to each other in the length direction and the grid sides opposite to each other in the width direction are guided by 4 pull ropes through 6 guide wheels, and finally, the 4 pull ropes are converged to pass through the same guide wheel, and then, the converged pull ropes are guided to the outside of the electrolytic cell by 3 guide wheels respectively and are connected with a heavy object.
The weight of the weight connected with the force equalizing rods along the length direction of the grid 2 to be tested is 20-30 times of the sum of the weight of the frame and the weight of the ribs in the length direction of the grid to be tested. The weight of the weight is correspondingly lower compared to the lower strength of the grid sides in the width direction. The weight of the weight connected with the force equalizing rods along the width direction of the grid 2 to be tested is 30-50 times of the sum of the weight of the frame and the weight of the ribs in the width direction of the grid to be tested. Compared with the grid side edge strength in the length direction, the grid side edge strength is higher, and the weight of the heavy object is correspondingly higher.
Furthermore, the force-equalizing rod 8 is connected with two pull ropes 9 which are uniformly distributed. The two pull ropes can ensure even force distribution applied to the force-equalizing rod. And corrosion-resistant layers are arranged outside the first lead 5 and the second lead 6. And the lead is prevented from being corroded in the test process. The length and the width of the partition plate 4 are both larger than those of the grid 2 to be tested. So that the separator completely covers the grid to be tested, and the short circuit caused by the contact between the grid to be tested and the electrode grid is avoided.
The invention also provides a method for testing the corrosion resistance of the lead-acid storage battery grid alloy, which adopts the device for testing the corrosion resistance of the lead-acid storage battery grid alloy, and the testing method comprises the following steps:
step 1, integrally weighing the grid to be measured and the first lead, and measuring the size of the grid to be measured;
And replacing the grid to be tested with different alloy formulas, and repeating the steps to obtain the corrosion weight loss rate and the deformation rate of the grid with different alloy formulas under the action of stress so as to screen the grid alloy formula with better corrosion resistance.
Specifically, the electrolyte in the electrolytic cell adopts the electrolyte with the density of 1.1-1.4g/cm3The current discharged by the charge and discharge machine is 1-5A, and the discharge time is 120-216 h.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a lead acid battery grid alloy corrosion resistance testing arrangement for test grid that awaits measuring, a serial communication port, including the electrolysis trough of holding grid that awaits measuring, locate the electrode grid of the grid both sides that awaits measuring, locate the baffle between electrode grid and the grid that awaits measuring, the first lead wire that connects out from the utmost point ear department of the grid that awaits measuring, the second lead wire that connects out in parallel from the utmost point ear department of two electrode grids, the charging and discharging machine of being connected with first lead wire and second lead wire electricity, locate average force line and the average force pole of the grid side that awaits measuring, the stay cord of connecting the average force pole, the heavy object of connecting the stay cord through the guide pulley subassembly.
2. The device for testing the corrosion resistance of the grid alloy of the lead-acid storage battery according to claim 1, wherein the force-equalizing line is a line uniformly wound on the grid to be tested and the force-equalizing rod.
3. The device for testing corrosion resistance of lead-acid battery grid alloy according to claim 1, wherein pull ropes connected with the force equalizing rods on the opposite sides of the grid to be tested are connected to the same heavy object through the guide wheel assembly.
4. The device for testing the corrosion resistance of the grid alloy of the lead-acid storage battery according to claim 3, wherein the weight of a weight connected with the force equalizing rods along the length direction of the grid to be tested is 20-30 times of the sum of the weight of frames and ribs in the length direction of the grid to be tested.
5. The device for testing the corrosion resistance of the grid alloy of the lead-acid storage battery according to claim 3, wherein the weight of a weight connected with the force equalizing rods in the width direction of the grid to be tested is 30-50 times of the sum of the weight of frames and ribs in the width direction of the grid to be tested.
6. The device for testing the corrosion resistance of the grid alloy of the lead-acid storage battery according to claim 1, wherein two pull ropes which are uniformly distributed are connected to the force-equalizing rod.
7. The device for testing the corrosion resistance of the grid alloy of the lead-acid storage battery according to claim 1, wherein the first lead and the second lead are externally provided with corrosion-resistant layers.
8. The device for testing the corrosion resistance of the grid alloy of the lead-acid storage battery according to claim 1, wherein the length and the width of the partition are both larger than those of the grid to be tested.
9. A method for testing the corrosion resistance of a lead-acid battery grid alloy, which is characterized by adopting the device for testing the corrosion resistance of the lead-acid battery grid alloy according to claim 1, and comprises the following steps:
step 1, integrally weighing the grid to be measured and the first lead, and measuring the size of the grid to be measured;
step 2, starting the charge-discharge machine to continuously discharge the grid to be tested;
step 3, after the discharge is finished, cleaning a corrosion product on the grid to be tested by using a sugar-alkali solution, then integrally weighing the grid to be tested and the first lead, and calculating the corrosion weight loss rate of the grid to be tested; and measuring the size of the grid to be measured again, and calculating the deformation rate of the grid to be measured.
10. The method for testing corrosion resistance of grid alloy of lead-acid storage battery according to claim 9, wherein the electrolyte in the electrolytic cell has a density of 1.1-1.4g/cm3The current discharged by the charge and discharge machine is 1-5A, and the discharge time is 120-216 h.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010375532.9A CN111579474A (en) | 2020-05-07 | 2020-05-07 | Device and method for testing corrosion resistance of lead-acid storage battery grid alloy |
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| CN202010375532.9A CN111579474A (en) | 2020-05-07 | 2020-05-07 | Device and method for testing corrosion resistance of lead-acid storage battery grid alloy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN117147424A (en) * | 2023-08-16 | 2023-12-01 | 江苏理士电池有限公司 | Device and method for detecting electrochemical corrosion of small lead-acid storage battery terminal |
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| 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 |
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| CN117147424A (en) * | 2023-08-16 | 2023-12-01 | 江苏理士电池有限公司 | Device and method for detecting electrochemical corrosion of small lead-acid storage battery terminal |
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