CN114267888B - 2V battery production system and production process thereof - Google Patents
2V battery production system and production process thereof Download PDFInfo
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- CN114267888B CN114267888B CN202111618949.4A CN202111618949A CN114267888B CN 114267888 B CN114267888 B CN 114267888B CN 202111618949 A CN202111618949 A CN 202111618949A CN 114267888 B CN114267888 B CN 114267888B
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- 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
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- 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
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- 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
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Abstract
The invention belongs to the technical field of lead-acid storage battery production, and particularly relates to a 2V battery production system and a production process thereof. The production process comprises paste mixing, board coating, surface drying, solidification and drying, pole group welding, groove entering, sealing, terminal welding, acid adding, formation charging and test analysis. The beneficial effects of the invention are as follows: the whole production system has relatively concentrated working procedures and shorter production line, and the production devices are closer in distance, so that the process operation is facilitated, and the resource waste in the transportation process and the like is reduced. And the whole production system is concentrated in a single workshop, so that the production test requirements of storage batteries with various specifications can be met, the development cost of products can be effectively reduced, the development period is shortened, the energy is saved, the consumption is reduced, and the environment-friendly production is realized.
Description
Technical Field
The invention belongs to the technical field of lead-acid storage battery production, and particularly relates to a 2V battery production system and a production process thereof.
Background
The lead-acid storage battery industry, in particular the automobile storage battery, has different requirements on products under the influence of different market applications and different regional environments, different customer requirements and different vehicle-mounted mounting conditions, the design of the storage battery is differentiated, the change of materials, formulas and structures of the storage battery is mainly reflected, the common practice is that the test times are obtained by means of a DOE (DESIGN OF EXPERIMENT test design) test model, the number of single verification test batches is often more than 10, so that polar plates with different formulas are manufactured, and different battery samples are manufactured for parallel comparison test analysis to obtain the optimal battery design, so that the market applications and the customer requirements are met.
In the traditional test, the existing production line equipment, tooling molds, personnel, sites and the like are used, so that the energy consumption is extremely high, the material waste is large, the process debugging rejection rate is increased, the test cost is increased, for example, the paste formula test is carried out, the scheme of only one formula is carried out once, at least 700Kg of lead powder is added into paste, and a large amount of material waste is caused due to the process loss; and when a plurality of products are tested at the same time, the production line is required to be subjected to multiple-time mould changing production, so that a great deal of manpower, material resources, time and the like are wasted; in addition, due to the manufacturability difference of the plate coating equipment, the manufacturability of the plate samples is poor due to the change of the formula, the scrapping proportion of the process is very high, even the plate cannot be produced, the machine is stopped, and the test cannot be performed. The above process of the production line test is used, the production period is long, and thus, the time for delivering the sample to the customer is prolonged, which is unfavorable for dealing with the rapid change of the market. Therefore, development of a small test production system and a production process capable of meeting the production test requirements of storage batteries with various specifications is needed, development cost of products is effectively reduced, development period is shortened, energy is saved, consumption is reduced, and environmental friendliness is achieved.
Disclosure of Invention
Aiming at the situation, the invention aims to introduce a 2V battery production system and a production process thereof so as to meet the production test requirements of storage batteries with various specifications, effectively reduce the development cost of products, shorten the development period, save energy and reduce consumption and realize green and environment-friendly production.
In order to achieve the above object, according to one aspect of the present invention, the present invention adopts the following technical scheme:
a 2V battery production system and a production process thereof, comprising:
the small paste mixing machine is used for mixing the paste once, the input lead powder amount is 5 Kg-100 Kg, the lead powder mixing machine is used for realizing a single-group storage battery formula test, and materials of different storage battery formula components are manufactured into the lead paste meeting the formula parameter requirements;
the small-sized plate coating machine is used for uniformly coating the lead paste produced by the small-sized paste mixing machine on the grid of the electric conductor according to the parameter requirement of the plate, so as to manufacture a raw positive wet plate and a raw negative wet plate;
the drying channel is used for surface drying the raw positive wet polar plate or the raw negative wet polar plate;
the high-temperature high-humidity curing box is used for curing and drying the surface-dried green electrode plates to obtain cured positive electrode green electrode plates and negative electrode green electrode plates with Pb content less than 3% and water content less than 1%;
the welding table is used for welding the assembled and cured positive electrode raw polar plates together and welding the positive electrode raw polar plates with the positive electrode post, and welding the assembled and cured negative electrode raw polar plates together and welding the assembled and cured negative electrode raw polar plates with the negative electrode post to form a polar group;
the assembly table is used for manually placing the pole group into the 2V battery groove;
the glue sealing cover platform is used for gluing the 2V battery groove in which the electrode group is arranged with the matched battery cover to obtain a battery body;
the glue drying box is used for drying the battery body for 1h at the temperature of 60 ℃;
the welding table is used for welding the positive and negative electrode connecting terminals of the dried battery body by using oxygen acetylene welding, so that the positive and negative electrodes of the electrode group are respectively welded with the positive and negative electrode lead sleeves on the battery cover to obtain a battery primary product;
the acid adding table is used for completing the acid adding operation of the battery primary product;
the water bath formation tank is used for placing battery initial products after acid addition, and is convenient for carrying out chemical charging and performance test by adopting a 2V charging and discharging machine, and circulating cooling water is introduced into the water bath formation tank and is used for reducing high temperature generated in the battery charging process.
Preferably, the height of the equipment of the small paste mixing machine is 1.8m, the length of a coating line of the small paste coating machine is 3.2m, the length of a high-temperature high-humidity curing box is 2m, the depth of the high-temperature high-humidity curing box is 1.5m, the length of a water bath forming groove is 2m, the width of the water bath forming groove is 1.2m, and the water bath forming groove comprises an upper layer and a lower layer.
Based on another aspect of the present invention, there is provided a 2V battery production system comprising the steps of:
(1) And (3) paste mixing: adding lead powder and additives according to the formula of the lead-acid storage battery with corresponding specification, dry-mixing and stirring for 10min, adding pure water, wet-mixing and stirring for 10min, and adding the lead powder and the additives with the density of 1.4g/cm 3 Mixing and stirring for 5min, dispersing and adding sodium perborate, mixing and stirring for 12min, detecting apparent density and moisture of the lead plaster after the final mixing is finished for 10min, and sealing and storing in a plastic bag with 30Kg capacity when the lead plaster temperature is less than 49 ℃ after penetration is qualified;
(2) Coating: 130 g+ -1 g of lead paste is uniformly smeared on a grid with the single piece weight of 46.5g + -1 g, and the back view density of the roller is 4.40 g/cm+ -0.10 g/cm 3 A positive wet plate and a negative wet plate;
(3) Surface drying: drying the green positive wet polar plate or the green negative wet polar plate in summer at the temperature of less than or equal to 150 ℃ and winter at the temperature of less than or equal to 160 ℃ until the moisture is 9.6-12%, the thickness is 2.1mm plus or minus 1.0mm, the flatness is less than or equal to 0.08mm, and the weight is 163g plus or minus 4.0g of the positive green polar plate and the negative green polar plate;
(4) And (3) curing and drying: curing and drying the positive electrode green plate and the negative electrode green plate in a high-temperature high-humidity curing box respectively to obtain a cured positive electrode green plate and a cured negative electrode green plate with Pb content less than 3% and moisture less than 1%;
(5) Welding the electrode group: welding all pieces of the assembled solidified positive electrode green plates together and welding with positive electrode posts, and welding all pieces of the assembled solidified negative electrode green plates together and welding with negative electrode posts to form a pole group;
(6) And (3) entering a groove: manually assembling the pole group into a specially-manufactured 2V battery groove;
(7) And (3) sealing cover: gluing the 2V battery groove in which the electrode group is placed with a matched battery cover to obtain a battery body, and then drying the battery body in a drying oven at 60 ℃ for 1h;
(8) Terminal welding: welding positive and negative electrode connecting terminals of the dried battery body by using oxygen acetylene welding, so that positive and negative electrodes of the electrode group are respectively welded with positive and negative electrode lead sleeves on the battery cover to obtain a battery primary product;
(9) Acid adding: adding sulfuric acid with the temperature below 20 ℃ and the density of 1.25g/cm plus or minus 0.003g/cm into the primary product of the battery under the condition that the temperature is less than or equal to 40 ℃, wherein the acid adding amount is 500ml plus or minus 3ml, the appearance of the sulfuric acid is colorless and transparent, and the Fe content is less than or equal to 0.002%;
(10) And (3) formation charging: and (3) placing the battery primary product with the added acid in a water bath formation tank, and performing formation charging by adopting a 2V charging and discharging machine, wherein the charging amount is 198Ah, and the total charging time is 11h, so as to obtain a 2V battery finished product.
(11) Test analysis: and synchronously testing the performance of the battery in the formation charging process, and analyzing the test data collected by the charging system to obtain an optimal DOE scheme.
Preferably, the step of curing and drying the positive green plate in the step (3) is:
step 1, curing at 96 ℃ with 99% relative humidity for 3h; the circulating air quantity is 20%;
step 2, curing at 50 ℃ with 98% relative humidity for 10 hours; the circulating air quantity is 30%;
step 3, curing at 50 ℃ with 90% relative humidity for 6h; the circulating air quantity is 30%;
step 4, curing at 55 ℃ with 80% relative humidity for 6 hours; the circulating air quantity is 30%;
step 5, curing at 60 ℃ with a relative humidity of 70% for 3 hours; the circulation air quantity is 40%;
step 6, curing at 65 ℃ with 60% relative humidity for 2h; the circulation air quantity is 40%;
step 7, curing at 70 ℃ with relative humidity of 50% for 2h; the circulation air quantity is 50%;
step 8, drying at 75 ℃ with 30% relative humidity for 2h; the circulation air quantity is 50%;
step 9, drying at 75 ℃ with 0% relative humidity for 10 hours; the circulation air quantity is 50%;
step 10, drying at 40 ℃ with 0% relative humidity for 1h; the circulating air quantity is 50%.
Preferably, the step of curing and drying the negative green plate in the step (3) is:
step 1, curing at 50 ℃ with 98% relative humidity for 3 hours; the circulating air quantity is 30%;
step 2, curing at 50 ℃ with 90% relative humidity for 5 hours; the circulating air quantity is 30%;
step 3, curing at 50 ℃ with 80% relative humidity for 6 hours; the circulation air quantity is 50%;
step 4, curing at 50 ℃ with 60% relative humidity for 3 hours; the circulation air quantity is 50%;
step 5, drying at 60 ℃ with 30% relative humidity for 2h; the circulation air quantity is 50%;
step 6, drying at 75 ℃ with relative humidity of 5% for 2h; the circulation air quantity is 50%;
step 7, drying at 75 ℃ with 0% relative humidity for 14h; the circulation air quantity is 50%;
step 8, drying at 40 ℃ with 0% relative humidity for 1h; the circulating air quantity is 50%.
Preferably, in the step (10), the step of formation charging is:
step 1, charging current is 2A, and charging time is 2min;
step 2, charging current is 14A, and charging time is 10min;
step 3, charging current is 24A, and charging time is 10min;
step 4, charging current is 30A, and charging time is 133min;
step 5, charging current is 0A, and charging time is 60min;
step 6, charging current is 5A, and charging time is 2min;
step 7, the charging current is 23A, and the charging time is 100min;
step 8, charging current is 0A, and charging time is 30min;
step 9, the charging current is 23A, and the charging time is 100min;
step 10, charging current is 0A, and charging time is 2min;
step 11, charging current is-24A, and charging time is 30min;
step 12, the charging current is 20A, and the charging time is 182min.
The invention also includes other components, devices or steps which enable normal use thereof, all as conventional in the art, and in addition, the steps, devices or components not defined in the invention are all prior art in the art.
Compared with the prior art, the invention has the beneficial effects that:
the whole production system has relatively concentrated working procedures, short production line and short distance of each production device, is convenient for flow operation, and is beneficial to reducing the resource waste in the transportation process and the like. And the whole production system is concentrated in a single workshop, so that the production test requirements of storage batteries with various specifications can be met, the development cost of products can be effectively reduced, the development period is shortened, the energy is saved, the consumption is reduced, and the environment-friendly production is realized.
Drawings
FIG. 1 is a layout of the production system of the present invention in example 1.
FIG. 2 is a flow chart of the production process of the present invention in example 2.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below in connection with specific embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
It should be noted that, the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc. are shown based on the drawings, and are merely for convenience of description.
Example 1
As shown in fig. 1, the present invention provides a 2V battery production system, comprising:
the small paste mixing machine 1 is used for mixing the paste once, the lead powder input amount is 5 Kg-100 Kg, the lead powder is used for realizing a single-group storage battery formula test, and materials of different storage battery formula components are manufactured into the lead paste meeting the formula parameter requirements;
the small-sized plate coating machine 2 is used for uniformly coating the lead paste produced by the small-sized paste mixing machine on the grid of the electric conductor according to the parameter requirement of the plate, so as to manufacture a raw positive wet plate and a raw negative wet plate;
a drying channel 3 for surface drying the green positive wet polar plate or the green negative wet polar plate;
the high-temperature high-humidity curing box 4 is used for curing and drying the surface-dried green electrode plates to obtain cured positive electrode green electrode plates and negative electrode green electrode plates with Pb content less than 3% and water content less than 1%;
an assembly table 5 for manually placing the pole group into a 2V battery tank;
a welding table 6, configured to weld each piece of the assembled cured positive electrode green plate together and to weld with the positive electrode post, and weld each piece of the assembled cured negative electrode green plate together and to weld with the negative electrode post to form a pole group;
the glue sealing cover table 7 is used for gluing the 2V battery groove of the embedded electrode group with a matched battery cover to obtain a battery body;
a glue drying box 8 for drying the battery body at 60 ℃ for 1h;
the welding table 9 is used for welding positive and negative electrode wiring terminals of the dried battery body by using oxygen acetylene welding, so that positive and negative electrodes of the electrode group are respectively welded with positive and negative electrode lead sleeves on the battery cover to obtain a battery primary product;
an acid adding table 10 for completing the acid adding operation of the battery primary product;
the water bath formation tank 11 is used for placing battery primary products added with acid, and is convenient for carrying out chemical charging and performance test by adopting the 2V charging and discharging machine 12, and circulating cooling water is filled in the water bath formation tank and is used for reducing high temperature generated in the battery charging process.
Specifically, the equipment height of the small paste mixer is 1.8m, the length of a coating line of the small paste mixer is 3.2m, the length of a high-temperature high-humidity curing box is 2m, the depth of the high-temperature high-humidity curing box is 1.5m, the length of a water bath forming groove is 2m, the width of the water bath forming groove is 1.2m, and the water bath forming groove comprises an upper layer and a lower layer.
Example 2
As shown in fig. 2, the invention provides a 2V battery production process, which comprises the following steps:
(1) And (3) paste mixing: adding lead powder and additives according to the formula of the lead-acid storage battery with corresponding specification, dry-mixing and stirring for 10min, adding pure water, wet-mixing and stirring for 10min, and adding the lead powder and the additives with the density of 1.4g/cm 3 Mixing and stirring for 5min, dispersing and adding sodium perborate, mixing and stirring for 12min, detecting apparent density and moisture of the lead plaster after the final mixing is finished for 10min, and sealing and storing in a plastic bag with 30Kg capacity when the lead plaster temperature is less than 49 ℃ after penetration is qualified;
(2) Coating: uniformly coating 130 g+/-1 g lead paste on a grid with the weight of 46.5 g+/-1 g of a single sheet to prepare an anode wet polar plate and a cathode wet polar plate with the roll rearview density of 4.40 g/cm+/-0.10 g/cm < 3 >;
(3) Surface drying: drying the green positive wet polar plate or the green negative wet polar plate in summer at the temperature of less than or equal to 150 ℃ and winter at the temperature of less than or equal to 160 ℃ until the moisture is 9.6-12%, the thickness is 2.1mm plus or minus 1.0mm, the flatness is less than or equal to 0.08mm, and the weight is 163g plus or minus 4.0g of the positive green polar plate and the negative green polar plate;
(4) And (3) curing and drying: curing and drying the positive electrode green plate and the negative electrode green plate in a high-temperature high-humidity curing box respectively to obtain a cured positive electrode green plate and a cured negative electrode green plate with Pb content less than 3% and moisture less than 1%;
(5) Welding the electrode group: welding all pieces of the assembled solidified positive electrode green plates together and welding with positive electrode posts, and welding all pieces of the assembled solidified negative electrode green plates together and welding with negative electrode posts to form a pole group;
(6) And (3) entering a groove: manually assembling the pole group into a specially-manufactured 2V battery groove;
(7) And (3) sealing cover: gluing the 2V battery groove in which the electrode group is placed with a matched battery cover to obtain a battery body, and then drying the battery body in a drying oven at 60 ℃ for 1h;
(8) Terminal welding: welding positive and negative electrode connecting terminals of the dried battery body by using oxygen acetylene welding, so that positive and negative electrodes of the electrode group are respectively welded with positive and negative electrode lead sleeves on the battery cover to obtain a battery primary product;
(9) Acid adding: adding sulfuric acid with the density of 1.25g/cm plus or minus 0.003g/cm and the acid addition amount of 500ml plus or minus 3ml into a battery primary product at the temperature of less than or equal to 40 ℃, wherein the sulfuric acid is colorless and transparent, and the Fe content is less than or equal to 0.002%;
(10) And (3) formation charging: and (3) placing the battery primary product with the added acid in a water bath formation tank, and performing formation charging by adopting a 2V charging and discharging machine, wherein the charging amount is 198Ah, and the total charging time is 11h, so as to obtain a 2V battery finished product.
(11) Test analysis: and synchronously testing the performance of the battery in the formation charging process, and analyzing the test data collected by the charging system to obtain an optimal DOE scheme.
Specifically, the steps of curing and drying the positive green plate in the step (3) are as follows:
step 1, curing at 96 ℃ with 99% relative humidity for 3h; the circulating air quantity is 20%;
step 2, curing at 50 ℃ with 98% relative humidity for 10 hours; the circulating air quantity is 30%;
step 3, curing at 50 ℃ with 90% relative humidity for 6h; the circulating air quantity is 30%;
step 4, curing at 55 ℃ with 80% relative humidity for 6 hours; the circulating air quantity is 30%;
step 5, curing at 60 ℃ with a relative humidity of 70% for 3 hours; the circulation air quantity is 40%;
step 6, curing at 65 ℃ with 60% relative humidity for 2h; the circulation air quantity is 40%;
step 7, curing at 70 ℃ with relative humidity of 50% for 2h; the circulation air quantity is 50%;
step 8, drying at 75 ℃ with 30% relative humidity for 2h; the circulation air quantity is 50%;
step 9, drying at 75 ℃ with 0% relative humidity for 10 hours; the circulation air quantity is 50%;
step 10, drying at 40 ℃ with 0% relative humidity for 1h; the circulating air quantity is 50%.
Specifically, the steps of curing and drying the negative green plate in the step (3) are as follows:
step 1, curing at 50 ℃ with 98% relative humidity for 3 hours; the circulating air quantity is 30%;
step 2, curing at 50 ℃ with 90% relative humidity for 5 hours; the circulating air quantity is 30%;
step 3, curing at 50 ℃ with 80% relative humidity for 6 hours; the circulation air quantity is 50%;
step 4, curing at 50 ℃ with 60% relative humidity for 3 hours; the circulation air quantity is 50%;
step 5, drying at 60 ℃ with 30% relative humidity for 2h; the circulation air quantity is 50%;
step 6, drying at 75 ℃ with relative humidity of 5% for 2h; the circulation air quantity is 50%;
step 7, drying at 75 ℃ with 0% relative humidity for 14h; the circulation air quantity is 50%;
step 8, drying at 40 ℃ with 0% relative humidity for 1h; the circulating air quantity is 50%.
Specifically, in the step (10), the step of formation charging is:
step 1, charging current is 2A, and charging time is 2min;
step 2, charging current is 14A, and charging time is 10min;
step 3, charging current is 24A, and charging time is 10min;
step 4, charging current is 30A, and charging time is 133min;
step 5, charging current is 0A, and charging time is 60min;
step 6, charging current is 5A, and charging time is 2min;
step 7, the charging current is 23A, and the charging time is 100min;
step 8, charging current is 0A, and charging time is 30min;
step 9, the charging current is 23A, and the charging time is 100min;
step 10, charging current is 0A, and charging time is 2min;
step 11, charging current is-24A, and charging time is 30min;
step 12, the charging current is 20A, and the charging time is 182min.
Compared with the lead-acid storage battery production system in the prior art, which occupies about 3.2 ten thousand square meters, the whole production system of the invention occupies only 98 square meters, and has relatively concentrated working procedures and shorter production line, and the production devices have relatively short distance, thereby facilitating the flow operation and reducing the resource waste in the transportation process and the like. And the whole production system is concentrated in a single workshop, so that the production test requirements of storage batteries with various specifications can be met, the development cost of products can be effectively reduced, the development period is shortened, the energy is saved, the consumption is reduced, and the environment-friendly production is realized.
The technical solution of the present invention is not limited to the above-described specific embodiments, and many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments, and any technical modifications made within the spirit and principles of the present invention fall within the scope of the present invention.
Claims (1)
1. A 2V battery production process, characterized in that 2V battery production is performed using a 2V battery production system, the 2V battery production system comprising:
the small paste mixing machine is used for mixing the paste once, the input lead powder amount is 5 Kg-100 Kg, and the lead powder is used for realizing a single-group storage battery formula test, and materials of different storage battery formula components are manufactured into the lead paste meeting the formula parameter requirements;
the small-sized plate coating machine is used for uniformly coating the lead paste produced by the small-sized paste mixing machine on the grid of the electric conductor according to the parameter requirement of the plate, so as to manufacture a raw positive wet plate and a raw negative wet plate;
the drying channel is used for surface drying the raw positive wet polar plate or the raw negative wet polar plate;
the high-temperature high-humidity curing box is used for curing and drying the surface-dried green electrode plates to obtain cured positive electrode green electrode plates and negative electrode green electrode plates with Pb content less than 3% and water content less than 1%;
the welding table is used for welding the assembled and cured positive electrode raw polar plates together and welding the positive electrode raw polar plates with the positive electrode post, and welding the assembled and cured negative electrode raw polar plates together and welding the assembled and cured negative electrode raw polar plates with the negative electrode post to form a polar group;
the assembly table is used for manually placing the pole group into the 2V battery groove;
the glue sealing cover platform is used for gluing the 2V battery groove in which the electrode group is arranged with the matched battery cover to obtain a battery body;
the glue drying box is used for drying the battery body for 1h at the temperature of 60 ℃;
the welding table is used for welding the positive and negative electrode connecting terminals of the dried battery body by using oxygen acetylene welding, so that the positive and negative electrodes of the electrode group are respectively welded with the positive and negative electrode lead sleeves on the battery cover to obtain a battery primary product;
the acid adding table is used for completing the acid adding operation of the battery primary product;
the water bath formation tank is used for placing the battery primary product after acid addition, and is convenient for carrying out chemical charging and performance test by adopting a 2V charging and discharging machine, and circulating cooling water is filled in the water bath formation tank and is used for reducing the high temperature generated in the battery charging process;
the height of the equipment of the small paste mixing machine is 1.8m, the length of a coating line of the small paste coating machine is 3.2m, the length of a high-temperature high-humidity curing box is 2m, the depth of the high-temperature high-humidity curing box is 1.5m, the length of a water bath formation groove is 2m, the width of the water bath formation groove is 1.2m, and the small paste mixing machine comprises an upper layer and a lower layer, and the whole production system is concentrated in a single workshop and occupies only 98 square meters;
the 2V battery production process further comprises the following steps:
(1) And (3) paste mixing: adding lead powder and additives according to the formula of the lead-acid storage battery with corresponding specification, dry-mixing and stirring for 10min, adding pure water, wet-mixing and stirring for 10min, and adding the lead powder and the additives with the density of 1.4g/cm 3 The lead plaster is stirred for 5min by acid mixing, sodium perborate is added in a dispersing way, the final mixing is carried out for 12min, the apparent density and the moisture content of the lead plaster are detected after the final mixing is finished for 10min, and after the lead plaster is qualified, the lead plaster is filled into a plastic bag with the capacity of 30Kg when the temperature of the lead plaster is less than 49 ℃, and the lead plaster is stored in a sealing way;
(2) Coating: uniformly coating 130 g+/-1 g lead paste on a grid with a single piece weight of 46.5 g+/-1 g to prepare the high-density lead-acid-free plate with a roll rearview density of 4.40 g/cm+/-0.10 g/cm 3 A positive wet plate and a negative wet plate;
(3) Surface drying: drying the green positive wet polar plate or the green negative wet polar plate in summer at the temperature of less than or equal to 150 ℃ and winter at the temperature of less than or equal to 160 ℃ until the moisture is 9.6-12%, the thickness is 2.1mm plus or minus 1.0mm, the flatness is less than or equal to 0.08mm, and the weight is 163g plus or minus 4.0g of the positive green polar plate and the negative green polar plate;
the method comprises the following steps of curing and drying the positive electrode green plate:
step 1, curing at 96 ℃ with 99% relative humidity for 3h; the circulating air quantity is 20%;
step 2, curing at 50 ℃ with 98% relative humidity for 10 hours; the circulating air quantity is 30%;
step 3, curing at 50 ℃ with 90% relative humidity for 6h; the circulating air quantity is 30%;
step 4, curing at 55 ℃ with 80% relative humidity for 6 hours; the circulating air quantity is 30%;
step 5, curing at 60 ℃ with a relative humidity of 70% for 3 hours; the circulation air quantity is 40%;
step 6, curing at 65 ℃ with 60% relative humidity for 2h; the circulation air quantity is 40%;
step 7, curing at 70 ℃ with relative humidity of 50% for 2h; the circulation air quantity is 50%;
step 8, drying at 75 ℃ with 30% relative humidity for 2h; the circulation air quantity is 50%;
step 9, drying at 75 ℃ with 0% relative humidity for 10 hours; the circulation air quantity is 50%;
step 10, drying at 40 ℃ with 0% relative humidity for 1h; the circulation air quantity is 50%;
the method comprises the following steps of solidifying and drying a negative green plate:
step 1, curing at 50 ℃ with 98% relative humidity for 3 hours; the circulating air quantity is 30%;
step 2, curing at 50 ℃ with 90% relative humidity for 5 hours; the circulating air quantity is 30%;
step 3, curing at 50 ℃ with 80% relative humidity for 6 hours; the circulation air quantity is 50%;
step 4, curing at 50 ℃ with 60% relative humidity for 3 hours; the circulation air quantity is 50%;
step 5, drying at 60 ℃ with 30% relative humidity for 2h; the circulation air quantity is 50%;
step 6, drying at 75 ℃ with relative humidity of 5% for 2h; the circulation air quantity is 50%;
step 7, drying at 75 ℃ with 0% relative humidity for 14h; the circulation air quantity is 50%;
step 8, drying at 40 ℃ with 0% relative humidity for 1h; the circulation air quantity is 50%;
(4) And (3) curing and drying: curing and drying the positive electrode green plate and the negative electrode green plate in a high-temperature high-humidity curing box respectively to obtain a cured positive electrode green plate and a cured negative electrode green plate with Pb content less than 3% and moisture less than 1%;
(5) Welding the electrode group: welding all pieces of the assembled solidified positive electrode green plates together and welding with positive electrode posts, and welding all pieces of the assembled solidified negative electrode green plates together and welding with negative electrode posts to form a pole group;
(6) And (3) entering a groove: manually assembling the pole group into a specially-manufactured 2V battery groove;
(7) And (3) sealing cover: gluing the 2V battery groove in which the electrode group is placed with a matched battery cover to obtain a battery body, and then drying the battery body in a drying oven at 60 ℃ for 1h;
(8) Terminal welding: welding positive and negative electrode connecting terminals of the dried battery body by using oxygen acetylene welding, so that positive and negative electrodes of the electrode group are respectively welded with positive and negative electrode lead sleeves on the battery cover to obtain a battery primary product;
(9) Acid adding: adding the raw materials with the temperature less than 20deg.C and the density of 1.25g/cm into the battery under the condition that the temperature is less than 40deg.C 3 ±0.003g/cm 3 The added acid amount is 500ml plus or minus 3ml, the appearance of the sulfuric acid is colorless and transparent, and the Fe content is less than or equal to 0.002%;
(10) And (3) formation charging: placing the battery primary product with the added acid in a water bath formation tank, and performing formation charging by adopting a 2V charging and discharging machine, wherein the charging amount is 198Ah, and the total charging time is 11h, so as to obtain a 2V battery finished product;
wherein the formation charging step comprises the following steps:
step 1, charging current is 2A, and charging time is 2min;
step 2, charging current is 14A, and charging time is 10min;
step 3, charging current is 24A, and charging time is 10min;
step 4, charging current is 30A, and charging time is 133min;
step 5, charging current is 0A, and charging time is 60min;
step 6, charging current is 5A, and charging time is 2min;
step 7, the charging current is 23A, and the charging time is 100min;
step 8, charging current is 0A, and charging time is 30min;
step 9, the charging current is 23A, and the charging time is 100min;
step 10, charging current is 0A, and charging time is 2min;
step 11, charging current is-24A, and charging time is 30min;
step 12, charging current is 20A, and charging time is 182min;
(11) Test analysis: and synchronously testing the performance of the battery in the formation charging process, and analyzing the test data collected by the charging system to obtain an optimal DOE scheme.
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