CN111299551A - Detection method of lead-acid storage battery grid mold - Google Patents
Detection method of lead-acid storage battery grid mold Download PDFInfo
- Publication number
- CN111299551A CN111299551A CN202010240209.0A CN202010240209A CN111299551A CN 111299551 A CN111299551 A CN 111299551A CN 202010240209 A CN202010240209 A CN 202010240209A CN 111299551 A CN111299551 A CN 111299551A
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- grid
- temperature
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- lead
- storage battery
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- 238000003860 storage Methods 0.000 title claims abstract description 16
- 239000002253 acid Substances 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 claims description 6
- 238000009826 distribution Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000012216 screening Methods 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 7
- 208000010392 Bone Fractures Diseases 0.000 description 5
- 206010017076 Fracture Diseases 0.000 description 5
- 230000003068 static effect Effects 0.000 description 4
- 229910000978 Pb alloy Inorganic materials 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000013543 active substance Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 208000027790 Rib fracture Diseases 0.000 description 1
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- LQBJWKCYZGMFEV-UHFFFAOYSA-N lead tin Chemical compound [Sn].[Pb] LQBJWKCYZGMFEV-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
- B22D25/04—Casting metal electric battery plates or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/48—Thermography; Techniques using wholly visual means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
- G01K3/14—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values in respect of space
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The invention relates to the field of lead-acid battery manufacturing, and discloses a detection method of a grid mould of a lead-acid battery. Compared with the prior art, the invention directly detects the temperature of each point on the surface of the grid after demoulding and reversely deduces whether the demoulding temperature and the temperature distribution of the grid mould are uniform or not, thereby being capable of screening and obtaining the qualified grid mould, ensuring the quality of the grid cast by using the grid mould subsequently and effectively improving the overall quality of the subsequent storage battery.
Description
Technical Field
The invention relates to the field of lead-acid storage battery manufacturing, in particular to a detection method of a lead-acid storage battery grid mold.
Background
The grid is a main component of the lead-acid storage battery, and the grid is used as a carrier of an active substance to play roles of skeleton support and active substance adhesion, and is used as a current conductor to play roles of current collection, current collection and current transmission. And as a plate, current sharing serves to distribute current evenly to the active material.
The grid is manufactured by two methods, namely net pulling and casting. At present, most of grid molds are cast by adopting a grid mold casting process, the grid molds are divided into a movable mold and a static mold, a heating pipe and a cooling water pipe are arranged in the static mold, and mold cavities are arranged on the inner surfaces of the movable mold and the static mold. The prior grid casting process comprises the following steps: heating a grid mould in advance, closing a movable mould and a static mould of the grid mould after the grid mould meets the technological requirements, pouring a proper amount of lead liquid in a lead spoon into the grid mould from a pouring gate, quickly filling the mould cavity of the whole grid mould with the lead liquid under the action of gravity, then instantly introducing cooling water, solidifying the lead liquid in the mould cavity to form a grid, and then immediately demoulding.
The demoulding temperature and the temperature distribution of the grid mould have obvious influence on the performance of the grid, the demoulding temperature and the temperature distribution of the grid mould are limited by the quality of the grid mould, and the more uniform the temperature distribution in the grid mould is, the better the quality performance of the cast grid is. However, due to many factors influencing the quality of the grid mold, such as cooling water path design, mold heating and the like, the mold is not detected and screened well, so that the quality performance of the grid formed by subsequent casting cannot be predicted, and the overall quality of a subsequent storage battery is influenced.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems in the prior art, the invention provides a detection method of a grid mould of a lead-acid storage battery, which can screen and obtain a qualified grid mould by directly detecting the temperature of each point on the surface of the grid after demoulding and reversely pushing whether the demoulding temperature and the temperature distribution of the grid mould are uniform, thereby ensuring the quality of the grid cast by using the grid mould subsequently and effectively improving the overall quality of the subsequent storage battery.
The technical scheme is as follows: the invention provides a detection method of a grid mould of a lead-acid storage battery, which is characterized in that the temperature of each point on the surface of a grid sample is detected immediately after the grid sample is demoulded, the highest temperature, the lowest temperature and the temperature range difference of the surface of the grid sample are obtained, and whether the quality of the grid mould to be detected, which is casted to form the grid sample, is qualified is judged according to the highest temperature, the lowest temperature and the temperature range difference.
Preferably, when the maximum temperature is less than or equal to 230 ℃, the minimum temperature is greater than or equal to 170 ℃ and the temperature range is less than or equal to 40 ℃, judging that the quality of the grid die to be detected is qualified.
Preferably, the temperature of at least 16 points on the surface of the grid sample is measured immediately after demolding. The more the temperature of the surface of the grid sample detected after demolding is, the wider the range covering the surface of the grid sample is, the better the data is, and the more accurate the data is.
Preferably, the temperature of each point on the surface of the grid sample is detected within 10s after demoulding. And immediately detecting the temperature of each point on the surface of the grid sample after demolding, so that the temperature of the surface of the grid sample can be as same as the demolding temperature and the temperature distribution of the grid mold to be detected as possible, and the detection result can be more accurate.
Preferably, an infrared thermometer is adopted to measure the temperature of each point on the surface of the grid sample at one time. The infrared thermometer can detect the temperature of each point on the surface of the whole grid sample at one time, so that the temperature measurement is carried out in the shortest time after demoulding as far as possible, and the measurement accuracy is ensured.
Has the advantages that: as described in the background art, the quality of the grid mold in the prior art is difficult to define, but the invention determines whether the demolding temperature and the temperature distribution of the grid sample are uniform or not according to the highest temperature, the lowest temperature and the temperature range difference by detecting the surface temperature of each point on the surface of the grid sample immediately after the grid sample is demolded, so as to reversely push the demolding temperature and the temperature distribution of the grid mold to be detected of the grid sample; the temperature of the grid sample in a short time after demoulding is almost the same as the temperature and the temperature distribution in the die cavity of the grid die to be detected; therefore, whether the quality of the grid mould to be detected is qualified or not can be indirectly reflected through the method. The detection method is rapid and accurate, can effectively screen the grid mould to be detected, ensures the quality of the grid cast by using the grid mould subsequently, and effectively improves the overall quality of the subsequent storage battery.
Drawings
FIG. 1 is a schematic view of the temperature collection points of a grid sample;
fig. 2 is a metallographic structure diagram of a grid tab in grid samples 1 to 5 after demolding, where (a) is grid sample 1, (b) is grid sample 2, (c) is grid sample 3, (d) is grid sample 4, and (e) is grid sample 5;
fig. 3 is a metallographic structure diagram of a frame rib fracture and the inside of the grid sample 3, (a) the inside, (b) the fracture.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The invention provides a detection method of a grid mold of a lead-acid storage battery, which comprises the steps of using five pairs of grid molds to be detected with the same specification, respectively setting the same demolding temperature, casting by using the same casting machine, then measuring 16 points on the surface of each grid sample obtained after casting at one time by using an infrared thermometer (preferably, the model is SH11-IR P20) when demolding is carried out for 8s, as shown in figure 1 (the 16 points can be preferably and uniformly distributed and comprise grid lugs, frame ribs and internal ribs), respectively recording the temperatures of the 16 points on the surfaces of the five grid samples, and respectively recording the highest temperature, the lowest temperature and the temperature range of the surfaces of the five grid samples in the following table 1.
TABLE 1
| Grid sample 1 | Grid sample 2 | Grid sample 3 | Grid sample 4 | Grid sample 5 | |
| Maximum temperature (. degree. C.) | 196 | 210 | 240 | 196 | 225 |
| Minimum temperature (. degree.C.) | 178 | 186 | 165 | 160 | 173 |
| Extreme difference in temperature | 18 | 24 | 85 | 36 | 52 |
And (3) respectively observing the metallographic structures of the grid lugs in the grid sample 1, the grid sample 2, the grid sample 3, the grid sample 4 and the grid sample 5, as shown in the graphs (a), (b), (c), (d) and (e) in the figure 2.
As can be seen from the data in table 1 above, the maximum temperature of the grid sample 3 has reached 240 ℃, the minimum temperature is 165 ℃, and the temperature range has reached 85 ℃; the minimum temperature of grid sample 4 was 160 c and the temperature spread of grid sample 5 was 52 c. And metallographic structures show that lead alloy crystals at the plate grid lugs in the plate grid sample 3, the plate grid sample 4 and the plate grid sample 5 are large and loose, which shows that the plate grid lugs are easy to crack and break due to corrosion at the later stage. The maximum temperature of the grid sample 1 and the minimum temperature of the grid sample 2 are not more than 230 ℃, the minimum temperature of the grid sample 2 is not less than 170 ℃, the temperature range is not higher than 40 ℃, and the metallographic structure shows that the lead alloy crystals at the grid lugs of the plates in the grid sample 1 and the grid sample 2 are relatively fine, the structure is compact, and the phenomenon of corrosion and fracture does not occur after long-term use.
The cracked grid sample 3 of frame rib is spot sampled, as shown in fig. 3(a), (b), observe fracture department and inside metallographic structure, the inside local crystalline grain of rib is more tiny even, belong to typical lead-tin alloy metallographic structure, and see from the whole situation of fracture grid, the crystalline grain size is uneven, crystalline grain and grain boundary are relatively thick, the rib superficial layer has the thick column crystalline substance of straight length to exist, cause the reason of this result to be the temperature range is too big when the drawing of patterns, fracture department temperature is higher than 230 ℃. If in actual use of the battery, corrosion will accelerate, ultimately affecting conductivity and battery life.
The lead alloy of the grid sample is relatively fine in crystallization and not easy to be corroded and broken when the maximum temperature of the grid sample is not higher than 230 ℃, the minimum temperature of the grid sample is not lower than 170 ℃ and the temperature range is not higher than 40 ℃. Therefore, when the surface temperature of a grid sample cast by the grid mould to be detected meets the conditions, the corresponding grid mould to be detected is a qualified mould.
Therefore, the grid molds corresponding to the grid sample 1 and the grid sample 2 are judged to be qualified molds, and the grid molds corresponding to the grid sample 3, the grid sample 4 and the grid sample 5 are judged to be unqualified molds.
The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (5)
1. The detection method of the grid mold of the lead-acid storage battery is characterized in that the temperature of each point on the surface of a grid sample is detected immediately after the grid sample is demoulded, the highest temperature, the lowest temperature and the temperature range difference of the surface of the grid sample are obtained, and whether the quality of the grid mold to be detected, which is casted out of the grid sample, is qualified or not is judged according to the highest temperature, the lowest temperature and the temperature range difference.
2. The method for detecting the grid die of the lead-acid storage battery as claimed in claim 1, wherein when the maximum temperature is less than or equal to 230 ℃, the minimum temperature is greater than or equal to 170 ℃ and the temperature range is less than or equal to 40 ℃, the quality of the grid die to be detected is judged to be qualified.
3. The method for testing a grid mold for a lead-acid battery of claim 1, wherein the temperature of at least 16 points on the surface of the grid sample is tested immediately after demolding.
4. The method for detecting the grid die of the lead-acid storage battery as claimed in claim 1, wherein the temperature of each point on the surface of the grid sample is detected within 10s after demoulding.
5. The method for detecting the grid die of the lead-acid storage battery according to any one of claims 1 to 4, wherein the temperature of each point on the surface of the grid sample is measured at one time by an infrared thermometer at multiple points.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010240209.0A CN111299551A (en) | 2020-03-31 | 2020-03-31 | Detection method of lead-acid storage battery grid mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010240209.0A CN111299551A (en) | 2020-03-31 | 2020-03-31 | Detection method of lead-acid storage battery grid mold |
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| Publication Number | Publication Date |
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| CN111299551A true CN111299551A (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010240209.0A Pending CN111299551A (en) | 2020-03-31 | 2020-03-31 | Detection method of lead-acid storage battery grid mold |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934583A (en) * | 2014-02-27 | 2014-07-23 | 超威电源有限公司 | Method for improving manual welding quality of bus-bar |
| CN204740209U (en) * | 2015-04-28 | 2015-11-04 | 江苏苏中电池科技发展有限公司 | Automatic discriminating gear of stealthy gas pocket of grid |
| US20160040313A1 (en) * | 2014-08-05 | 2016-02-11 | Seek Thermal, Inc. | Method of producing an optical element |
| CN105651391A (en) * | 2015-12-31 | 2016-06-08 | 天能电池集团有限公司 | Detection method of cast-weld bottom die for plate group of lead-acid battery |
| CN106182664A (en) * | 2014-11-25 | 2016-12-07 | 柳道斯塔自动化株式会社 | For measuring the device of molded article surface temperature |
| CN209335965U (en) * | 2018-12-21 | 2019-09-03 | 水越精密模具(昆山)有限公司 | A kind of soft contact mold of high-precision inserts |
-
2020
- 2020-03-31 CN CN202010240209.0A patent/CN111299551A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934583A (en) * | 2014-02-27 | 2014-07-23 | 超威电源有限公司 | Method for improving manual welding quality of bus-bar |
| US20160040313A1 (en) * | 2014-08-05 | 2016-02-11 | Seek Thermal, Inc. | Method of producing an optical element |
| CN106182664A (en) * | 2014-11-25 | 2016-12-07 | 柳道斯塔自动化株式会社 | For measuring the device of molded article surface temperature |
| CN204740209U (en) * | 2015-04-28 | 2015-11-04 | 江苏苏中电池科技发展有限公司 | Automatic discriminating gear of stealthy gas pocket of grid |
| CN105651391A (en) * | 2015-12-31 | 2016-06-08 | 天能电池集团有限公司 | Detection method of cast-weld bottom die for plate group of lead-acid battery |
| CN209335965U (en) * | 2018-12-21 | 2019-09-03 | 水越精密模具(昆山)有限公司 | A kind of soft contact mold of high-precision inserts |
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Application publication date: 20200619 |
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