CN108511694B - Production process of lead-acid storage battery pole plate - Google Patents
Production process of lead-acid storage battery pole plate Download PDFInfo
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- CN108511694B CN108511694B CN201810129573.2A CN201810129573A CN108511694B CN 108511694 B CN108511694 B CN 108511694B CN 201810129573 A CN201810129573 A CN 201810129573A CN 108511694 B CN108511694 B CN 108511694B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/14—Electrodes for lead-acid accumulators
- H01M4/16—Processes of manufacture
- H01M4/20—Processes of manufacture of pasted electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/06—Lead-acid accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/14—Electrodes for lead-acid accumulators
- H01M4/16—Processes of manufacture
- H01M4/20—Processes of manufacture of pasted electrodes
- H01M4/21—Drying of pasted electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a production process of a lead-acid storage battery plate, and belongs to the technical field of production of lead-acid storage batteries. The production process comprises the following steps: (1) coating lead plaster on a grid, and compacting by a compression roller pair; (2) after the compaction, part of water in the polar plate is removed by negative pressure suction; (3) then, the polar plate is placed at the temperature of 80-110 ℃ for surface drying treatment; (4) and then carrying out curing and drying treatment on the polar plate. By adopting the process, the acid leaching procedure is omitted, the production site is clean, the operation is simple and feasible, the production cost and the operation difficulty are reduced, and the environment-friendly requirement of modern mass production is met; the method of physical moisture absorption and dehumidification is adopted, so that the surface dryness of the polar plate is ensured, the adhesion of the polar plate is avoided, and the drying level is comparable to that achieved by high-temperature drying; the step-by-step dehydration reduces the drying and water loss rate of the polar plate, ensures that no crack is generated on the surface of the polar plate, improves the strength of the polar plate, and has no influence on the performance of the storage battery.
Description
Technical Field
The invention relates to the technical field of lead-acid storage battery production, in particular to a production process of a lead-acid storage battery plate.
Background
The problem of pole plate adhesion generally exists in the process of coating the lead-acid storage battery, in order to ensure the quality of the pole plate, usually, coating paper is covered on the surface when a net-type grid is coated, and the problem of pole plate adhesion in the processes of collecting, curing and drying is solved through surface acid spraying of a casting type grid. The acid spraying process is adopted after the coating of the green plates in the manufacturing process of the green plates of the storage battery factory at present, generally, it is considered that the spraying of a small amount of sulfuric acid in the plate coating process is necessary to promote the formation of a sulfuric acid layer on the surfaces of the plates, ensure that the plates are not cracked and lead paste does not fall off in the subsequent production process and ensure the qualification rate of the finished products manufactured by the plates, but the acid spraying process has the following defects:
1. the production environment is poor, sulfuric acid drips on the production site, the site environment is polluted, the load of a sewage station is increased, and the environmental treatment cost is increased;
2. the cost of sulfuric acid for acid leaching is increased;
3. the lead plaster has too high lead sulfate content after being washed off during acid leaching, and cannot be recycled.
4. The dilute sulfuric acid for acid leaching needs equipment configuration and manual detection, and increases kinetic energy consumption and labor cost;
5. the fluctuation of the specific gravity of the acid spraying can cause the quality fluctuation of the green plate.
Patent document CN 102646815 a discloses a drying method for coated plates of polar plates, which comprises the following steps: step a, carrying out plate coating treatment on the polar plate; b, absorbing the moisture on the surface of the pole plate subjected to plate coating treatment by using a water absorbing material; and c, drying the polar plate. In the step b, the absorbent material is absorbent cotton yarn, and the absorbent cotton yarn is replaced every 4 hours of normal work. And c, the drying temperature and the speed of the pole plate passing through the surface dryer in the step c are adaptive to the water content of the surface and the internal lead plaster of the pole plate. According to the method, after the plate is coated, the water on the surface of the polar plate is directly absorbed by the water absorption material, and then the polar plate is dried, so that the acid leaching operation is omitted in the whole treatment process, and the problems of poor environment and the like caused by acid leaching in the prior art are solved.
However, after the acid spraying process is cancelled, in order to prevent the plate from being stuck, the temperature for curing and drying the plate is higher than the drying temperature in the prior art so as to accelerate the water loss on the surface of the plate, but the water is rapidly lost, so that the surface of the plate is very easy to generate tiny cracks, and the strength of the plate is influenced.
Although the acid leaching process has many defects, most manufacturers still adopt the acid leaching process technology because the non-acid leaching technology is difficult to break through.
Disclosure of Invention
The invention aims to provide a production process of a lead-acid storage battery pole plate, which replaces the existing acid spraying process on the premise of not influencing the quality of the pole plate and achieves the purposes of cleanness, environmental protection and low-cost operation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a production process of a lead-acid storage battery plate comprises the following steps:
(1) coating lead plaster on a grid, and compacting by a compression roller pair;
(2) after the compaction, part of water in the polar plate is removed by negative pressure suction;
(3) then, the polar plate is placed at the temperature of 80-110 ℃ for surface drying treatment;
(4) and then carrying out curing and drying treatment on the polar plate.
The production process of the invention cancels the step of acid spraying, carries out step-by-step dehydration on the coated polar plate, controls the water content of the polar plate and reduces the problem of polar plate adhesion. In the step (2), partial water in the green plate is removed by negative pressure suction, so that the load of a dryer in the next surface drying procedure is effectively reduced, and a foundation is laid for further reducing the subsequent drying temperature. In the step (3), the drying temperature of the drying line is 80-110 ℃, which is 20-40 ℃ lower than that of the acid spraying process, so that the surface of the polar plate is prevented from cracking due to overhigh drying temperature, the strength of the polar plate is ensured, and paste falling is prevented.
Preferably, in the step (1), the positive electrode lead paste comprises the following components: lead powder, short fiber, water and dilute sulfuric acid solution, wherein the weight part of the lead powder is 100 parts, the weight part of the short fiber is 0.06-0.15 part, the weight part of the water is 10.5-12 parts, and the density is 1.4g/cm35-12 parts of dilute sulfuric acid solution;
the negative pole lead paste comprises the following components: lead powder, barium sulfate, humic acid, sodium lignosulfonate, short fibers, water and dilute sulfuric acid solution, wherein the lead powder comprises, by weight, 100 parts of barium sulfate 0.6-0.8 part, 0.4-0.9 part of humic acid, 0.1-0.4 part of sodium lignosulfonate, 0.06-0.15 part of short fibers, 10.5-12 parts of water and 1.4g/cm of density35-12 parts of dilute sulfuric acid solution.
Preferably, the addition amount of the short fibers in the lead paste is 0.12 to 0.15 part by weight based on 100 parts by weight of the lead powder. According to the invention, the fiber dosage in the lead plaster is increased, the lead plaster bonding fastness is enhanced, the polar plate is ensured not to crack and fall, and the additive amount reaches 0.12-0.15% of the lead powder dosage.
The water content of the positive lead paste is not higher than 10.5%, the water content of the negative lead paste is not higher than 9.5%, the free water content in the pole plate is reduced when the green pole plate is manufactured, and the viscosity of the pole plate is reduced.
In the step (2), partial water in the polar plate is removed by using the negative pressure suction device, so that the water content in the polar plate is reduced by about 0.2%, and the surface of the polar plate is dry and flat.
Preferably, in the step (2), the negative pressure suction pressure is-0.2 to-0.5 MPa, and the mass percentage of the water removed from the polar plate is controlled to be 0.1 to 0.2 percent.
Preferably, the polar plate after negative pressure dehydration is compacted by a press roll pair. And the two compression rollers are adopted for processing, so that the lead plaster structure is more compact, and the strength of the polar plate is ensured.
Preferably, in the step (3), after the surface of the polar plate is dried, the water loss mass percentage is controlled to be 0.7-1.2%. The drying time is 30-120 s.
In order to avoid the pole plate from cracking due to too large temperature difference and prevent the temperature of the pole plate out of the dryer from being too high after drying is finished, the temperature of the pole plate after surface drying is preferably less than or equal to 42 ℃ in the step (3). If the temperature is high, the speed of the plate coating machine can be reduced, the temperature of the plate coating dryer can be reduced for adjustment, and if necessary, the temperature can be reduced by a fan.
The green plate after surface drying is required to enter a curing chamber for curing within 10 minutes, the temperature of the curing chamber is not higher than 45 ℃, and the relative humidity is 100%.
Preferably, in the step (4), the curing temperature is 45-55 ℃, the relative humidity is 90-100%, the time is 24-48 h, and the circulating air speed is less than 30%.
Preferably, in the step (4), the curing is finished and the drying is carried out, the temperature rising rate is less than or equal to 1 ℃/20min, the temperature rises to 65-75 ℃, the humidity reduction rate is less than or equal to 1%/10 min, the relative humidity is reduced to 0%, the wind speed increasing rate is less than or equal to 1%/10 min, and the constant temperature and the constant humidity are kept for 2 h.
And after the solidification and drying are finished, naturally cooling to normal temperature, and finishing the manufacturing of the polar plate.
The invention has the following beneficial effects:
(1) the process of the invention cancels the acid leaching procedure, has clean production site and simple and feasible operation, reduces the production cost and the operation difficulty, and meets the environmental protection requirement of modern mass production.
(2) The invention adopts a physical moisture absorption and dehumidification method, ensures the surface dryness of the polar plate, avoids the adhesion of the polar plate and is comparable to the drying level achieved by high-temperature drying.
(3) The invention dehydrates step by step, reduces the drying and water loss rate of the polar plate, ensures that no crack is generated on the surface of the polar plate, and improves the strength of the polar plate.
(4) By adopting the production process, the strength of the polar plate is obviously improved, and compared with an acid spraying process, the production process has no influence on the performance of the storage battery.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Comparative example 1
1. Lead plaster formula
The positive lead plaster comprises the following components: 100kg of lead powder, 0.05kg of short fibers, 10.5kg of water and 9.8kg of dilute sulfuric acid with the density of 1.4g/cm 3.
The negative pole lead plaster comprises the following components: 100kg of lead powder, 0.6kg of barium sulfate, 0.4kg of humic acid, 0.125kg of sodium lignosulfonate, 0.05kg of short fiber, 10.5kg of water and 1.4g/cm of density38.4kg of pure dilute sulfuric acid.
2. Polar plate preparation process
(1) Coating the prepared lead plaster on a grid by a coating machine according to the requirements of weight and thickness;
(2) pressing the coated polar plate for 1-2 times by an acid spraying roller by adopting an acid spraying process, wherein the acid spraying density is 1.05-1.20 g/cm 3;
(3) carrying out surface drying on the polar plate by a rapid dryer at the temperature of 150 ℃, wherein the passing speed of the polar plate is 100-150 sheets/min, the drying time is 40-100 s, the water loss rate is controlled to be 0.7-1.2%, and the temperature of the polar plate out of the dryer is 45-70 ℃;
(4) the green plate with the dried surface needs to enter a curing chamber for curing within 10 minutes, the temperature of the curing chamber is not higher than 45 ℃, and the relative humidity is 100%;
(5) the curing temperature is 45 ℃, the relative humidity is 90-100%, the curing time is 48h, and the circulating air speed is less than 30%;
(6) after curing, drying, wherein the heating rate is less than or equal to 1 ℃/20min, the temperature is increased to 65 ℃, the humidity reduction rate is less than or equal to 1%/10 min, the relative humidity is reduced to 0%, the wind speed increase rate is less than or equal to 1%/10 min, the normal drying process requirement is met within 6-9 hours, and the humidity is stable and unchanged until the drying cycle is continued for 2 hours;
(7) and after the solidification and drying are finished, naturally cooling to normal temperature, and finishing the manufacturing of the polar plate.
Example 1
1. Lead plaster formula
The positive lead plaster comprises the following components: 100kg of lead powder, 0.12kg of short fiber, 11kg of water and 1.4g/cm of density39.8kg of dilute sulfuric acid;
the negative pole lead plaster comprises the following components: 100kg of lead powder, 0.6kg of barium sulfate, 0.4kg of humic acid, 0.125kg of sodium lignosulfonate, 0.12kg of short fiber, 11kg of water and 1.4g/cm of density38.4kg of dilute sulfuric acid.
2. Polar plate preparation process
(1) Coating lead plaster on a grid, and compacting by a compression roller pair;
(2) after compaction, part of water in the polar plate is removed through negative pressure suction with the pressure of-0.2 MPa, and the mass percentage of the water removed from the polar plate is controlled to be 0.1-0.2%;
(3) the negative pressure dehydrated polar plate is compacted by a compression roller pair, and two compression rollers are adopted for treatment, so that the lead plaster structure is more compact, and the strength of the polar plate is ensured;
(4) the polar plate enters a drying line with the temperature of 80 ℃, the passing speed of the polar plate is 100 sheets/min, and the water loss rate is controlled to be 0.7-1.2%; the temperature of the polar plate out of the drying line is not higher than 42 ℃;
(5) the green plate with the dried surface needs to enter a curing chamber for curing within 10 minutes, the temperature of the curing chamber is not higher than 45 ℃, and the relative humidity is 100%;
(6) the curing temperature is 45 ℃, the relative humidity is 90-100%, the curing time is 48h, and the circulating air speed is less than 30%;
(7) after curing, drying, wherein the heating rate is less than or equal to 1 ℃/20min, the temperature is increased to 65 ℃, the humidity reduction rate is less than or equal to 1%/10 min, the relative humidity is reduced to 0%, the wind speed increase rate is less than or equal to 1%/10 min, the normal drying process requirement is met within 6-9 hours, and the humidity is stable and unchanged until the drying cycle is continued for 2 hours;
(8) and after the solidification and drying are finished, naturally cooling to normal temperature, and finishing the manufacturing of the polar plate.
3. Pole plate performance detection
3.1 Pole plate drop test
The test method comprises the following steps: the plates were weighed before testing, then dropped freely from a height of 1.2 meters horizontally onto the cement floor, and tested five times in succession, with the drop rate being (weight before drop-weight after drop)/(weight before drop-weight grid weight). The results are shown in Table 1.
TABLE 1
From the drop data, the drop rate of the plate prepared by the improved process of the example 1 is obviously reduced, and the scheme of the example 1 is feasible.
3.2 Battery Performance test
Assembling the polar plates into a storage battery according to a conventional process, wherein the model is as follows: 6-QW-60 maintenance-free storage battery, capacity: 60Ah low temperature large current discharge Icc 500A, reference test standard: GB/T5008.1-2013, the results are shown in Table 2.
TABLE 2
As can be seen from Table 2, the various properties of the plate prepared by the process of example 1 are not reduced compared with those of the plate prepared by the acid leaching process, and the scheme of the invention is proved to be feasible.
Example 2
1. Lead plaster formula
The positive lead plaster comprises the following components: 100kg of lead powder, 0.15kg of short fiber, 11.5kg of water and 1.4g/cm of density310kg of dilute sulfuric acid;
the negative pole lead plaster comprises the following components: 100kg of lead powder, 0.8kg of barium sulfate, 0.9kg of humic acid, 0.1kg of sodium lignosulfonate, 0.15kg of short fiber, 10.5kg of water and 1.4g/cm of density39kg of dilute sulfuric acid.
2. Polar plate preparation process
(1) Coating lead plaster on a grid, and compacting by a compression roller pair;
(2) after compaction, part of water in the polar plate is removed through negative pressure suction with the pressure of-0.5 MPa, and the mass percentage of the water removed from the polar plate is controlled to be 0.1-0.2%;
(3) the negative pressure dehydrated polar plate is compacted by a compression roller pair, and two compression rollers are adopted for treatment, so that the lead plaster structure is more compact, and the strength of the polar plate is ensured;
(4) the polar plate enters a drying line with the temperature of 110 ℃, the passing speed of the polar plate is 150 sheets/min, and the water loss rate is controlled to be 0.7-1.2%; the temperature of the polar plate out of the drying line is not higher than 42 ℃;
(5) the green plate with the dried surface needs to enter a curing chamber for curing within 10 minutes, the temperature of the curing chamber is not higher than 45 ℃, and the relative humidity is 100%;
(6) the curing temperature is 55 ℃, the relative humidity is 90-100%, the curing time is 24h, and the circulating air speed is less than 30%;
(7) after curing, drying, wherein the heating rate is less than or equal to 1 ℃/20min, the temperature is increased to 75 ℃, the humidity reduction rate is less than or equal to 1%/10 min, the relative humidity is reduced to 0%, the wind speed increase rate is less than or equal to 1%/10 min, the normal drying process requirement is met within 6-9 hours, and the humidity is stable and unchanged until the drying cycle is continued for 2 hours;
(8) and after the solidification and drying are finished, naturally cooling to normal temperature, and finishing the manufacturing of the polar plate.
The dropping rate of the pole plate prepared by the process is obviously lower than that of the pole plate in the comparative example 1, the performances of all aspects of the assembled storage battery are not worse than that of the pole plate in the comparative example 1, and the scheme of the embodiment is proved to be feasible.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A production process of a lead-acid storage battery plate is characterized by comprising the following steps:
(1) coating lead plaster on a grid, and compacting by a compression roller pair;
(2) after compaction, removing part of water in the polar plate through negative pressure suction, wherein the mass percent of the water removed from the polar plate is controlled to be 0.1-0.2%;
(3) then, the polar plate is placed at the temperature of 80-110 ℃ for surface drying treatment;
(4) then carrying out curing and drying treatment on the polar plate;
in the step (1), the positive lead plaster comprises the following components: lead powder, short fibers, water and dilute sulfuric acid solution, wherein the weight part of the lead powder is 100 parts, the weight part of the short fibers is 0.12-0.15 part, the weight part of the water is 10.5-12 parts, and the density is 1.4g/cm35-12 parts of dilute sulfuric acid solution;
the negative pole lead paste comprises the following components: lead powder, barium sulfate, humic acid, sodium lignosulfonate, short fibers, water and dilute sulfuric acid solution, wherein the lead powder comprises, by weight, 100 parts of barium sulfate 0.6-0.8 part, 0.4-0.9 part of humic acid, 0.1-0.4 part of sodium lignosulfonate, 0.12-0.15 part of short fibers, 10.5-12 parts of water and 1.4g/cm of density35-12 parts of dilute sulfuric acid solution.
2. The process for producing a lead-acid battery plate according to claim 1, wherein in the step (2), the negative pressure suction is carried out at a pressure of-0.2 to-0.5 MPa.
3. The process for producing a lead-acid battery plate according to claim 1, wherein the plate after negative pressure dehydration is compacted by a pair of rolls.
4. The production process of the lead-acid storage battery plate as claimed in claim 1, wherein in the step (3), the mass percentage of water loss of the plate after surface drying is controlled to be 0.7-1.2%.
5. The process for producing a lead-acid battery plate according to claim 1, wherein in the step (3), the temperature of the plate after surface drying is not more than 42 ℃.
6. The production process of the lead-acid storage battery plate as claimed in claim 1, wherein in the step (4), the curing temperature is 45-55 ℃, the relative humidity is 90-100%, the time is 24-48 h, and the circulating air speed is less than 30%.
7. The production process of the lead-acid storage battery plate as claimed in claim 1 or 6, wherein in the step (4), the solidification is completed and the drying is carried out, the temperature rising rate is less than or equal to 1 ℃/20min, the temperature rises to 65-75 ℃, the humidity reduction rate is less than or equal to 1%/10 min, the relative humidity is reduced to 0%, the wind speed increasing rate is less than or equal to 1%/10 min, and the constant temperature and the constant humidity are kept for 2 h.
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| CN111370651B (en) * | 2020-02-24 | 2021-08-03 | 天能电池集团股份有限公司 | Preparation method of curing-free storage battery plate |
| CN113823769A (en) * | 2021-07-26 | 2021-12-21 | 安徽理士电源技术有限公司 | Method for curing lead-acid storage battery pole plate |
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| CN102646815A (en) * | 2012-04-12 | 2012-08-22 | 肇庆理士电源技术有限公司 | Polar plate treating method and compression roller assembly used for same |
| CN102856536A (en) * | 2012-09-20 | 2013-01-02 | 江苏先特能源装备有限公司 | Pressure container curing chamber and curing method thereof |
| CN102938473A (en) * | 2012-11-11 | 2013-02-20 | 骆驼集团华南蓄电池有限公司 | Lead-acid storage battery |
| CN103219497A (en) * | 2013-01-29 | 2013-07-24 | 超威电源有限公司 | Enclosed-formed pole plate pressurizing and curing process |
| CN106129341A (en) * | 2016-08-18 | 2016-11-16 | 福建动力宝电源科技有限公司 | A kind of preparation method of Anti-cracking lead-acid battery negative pole plate |
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- 2018-02-08 CN CN201810129573.2A patent/CN108511694B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102646815A (en) * | 2012-04-12 | 2012-08-22 | 肇庆理士电源技术有限公司 | Polar plate treating method and compression roller assembly used for same |
| CN102856536A (en) * | 2012-09-20 | 2013-01-02 | 江苏先特能源装备有限公司 | Pressure container curing chamber and curing method thereof |
| CN102938473A (en) * | 2012-11-11 | 2013-02-20 | 骆驼集团华南蓄电池有限公司 | Lead-acid storage battery |
| CN103219497A (en) * | 2013-01-29 | 2013-07-24 | 超威电源有限公司 | Enclosed-formed pole plate pressurizing and curing process |
| CN106129341A (en) * | 2016-08-18 | 2016-11-16 | 福建动力宝电源科技有限公司 | A kind of preparation method of Anti-cracking lead-acid battery negative pole plate |
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Address after: 313100 Zhejiang city of Huzhou province Changxing County Meishan Industrial Park Applicant after: TIANNENG BATTERY GROUP Co.,Ltd. Address before: 313100 Zhejiang city of Huzhou province Changxing County Meishan Industrial Park Applicant before: TIANNENG BATTERY GROUP Co.,Ltd. |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |