CN114373896A - Processing technology of lead-acid green plate battery - Google Patents
Processing technology of lead-acid green plate battery Download PDFInfo
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- CN114373896A CN114373896A CN202111632473.XA CN202111632473A CN114373896A CN 114373896 A CN114373896 A CN 114373896A CN 202111632473 A CN202111632473 A CN 202111632473A CN 114373896 A CN114373896 A CN 114373896A
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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
- H01M10/12—Construction or manufacture
- H01M10/14—Assembling a group of electrodes or separators
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
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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
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention relates to a processing technology of a lead-acid green plate battery, which comprises the following steps: step one, lead powder manufacturing: preparing the electrolytic lead into lead powder with composite requirements by oxidizing and screening a special lead powder machine; step two, grid casting: casting the lead-antimony alloy and the lead-calcium alloy into a grid in a casting mode; step three, preparing lead plaster: the lead powder comprises the following components in parts by weight of 100 parts: 100 parts of lead powder, 1.4g/cm32.5-4.2 parts of sulfuric acid, 19.3-20.5 parts of water, 0.1-0.5 part of fumed silica dispersion, 0.5-1 part of short fiber and 0.3-0.5 part of selenium; aiming at changing a cooked polar plate into a polar plate, optimizing the acid solution formula of the battery, adopting a poor liquid type design, carrying out experimental analysis on the acid addition density, and optimizing the acid addition density; the acid content in the positive and negative lead pastes is increased, so that the porosity of the polar plate is increased, and the large electricity is further increasedAnd current discharge performance.
Description
Technical Field
The invention relates to the technical field of storage batteries, in particular to a processing technology of a lead-acid green plate battery.
Background
The lead-acid storage battery has the characteristics of easily available raw materials, simple manufacture, stable performance, low price, complete varieties and the like, and still occupies the domination in various secondary chemical power sources so far and occupies the largest market share.
The lead-acid storage battery has a mature technology, has the characteristics of high reliability, large capacity, high-rate discharge capacity, good temperature coefficient, multiple charge-discharge cycle times and proper cost, and is widely applied to the fields of motor vehicles, industrial and mining equipment, power storage systems and the like.
The lead-acid storage battery mainly comprises pole plates which are formed by filling a grid made of lead materials with lead paste to obtain a green pole plate and finally forming the green pole plate. The prior green plate needs to be subjected to chemical conversion treatment before being arranged in a battery body, and then can be packaged after being washed and dried. The formation process before packaging usually consumes a large amount of water, occupies a certain process time, and causes additional pollution.
In view of the above problems, it is necessary to improve them.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a processing technology of a lead-acid green plate battery, which saves formation time, has less power consumption, effectively improves production efficiency and battery capacity and prolongs the service life of the battery.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme: a processing technology of a lead-acid green plate battery comprises the following steps:
step one, lead powder manufacturing: preparing the electrolytic lead into lead powder with composite requirements by oxidizing and screening a special lead powder machine;
step two, grid casting: casting the lead-antimony alloy and the lead-calcium alloy into a grid in a casting mode;
step three, preparing lead plaster: the lead powder comprises the following components in parts by weight of 100 parts: 100 parts of lead powder, 1.4g/cm32.5-4.2 parts of sulfuric acid, 19.3-20.5 parts of water, 0.1-0.5 part of fumed silica dispersion, 0.5-1 part of short fiber and 0.3-0.5 part of selenium; spraying under the pressure of 0.04-0.08 MPa, and then soaking in acid liquor;
step four, pole plate formation; taking the polar plate out of the acid liquor on the basis of the third step, covering the surface of the polar plate with coated paper, stacking the polar plate and placing the polar plate in a curing chamber for curing to obtain the lead storage battery green polar plate;
assembling, namely assembling the polar plate with the closest weight on a lead-acid storage battery; obtaining a semi-finished product of the lead-acid green plate battery;
and step six, formation, namely adding acid to the semi-finished product, and then performing charging treatment, wherein the process is as follows:
(1) charging for the first time: charging the battery for 2 hours at a current of 1.5A;
(2) and (3) charging for the second time: charging the battery at 2.5A for 26 hours;
(3) and (3) charging for the third time: charging the battery for 10 hours at a current of 2A;
(4) fourth charging: charging the battery for 8 hours at a current of 1.5A;
(5) fifth charging: charging the battery for 8 hours at a current of 1A;
(6) and sixth charging: charging the battery for 1 hour at a constant voltage of 15V, and then pumping acid out of the battery, namely pumping free acid liquid in the battery;
(7) and (4) seventh charging: charging the battery for 8 hours at a current of 1.5A;
(8) and eighth charging: charging the battery for 9 hours at a current of 1.0A; and obtaining a finished product.
In a preferable scheme of the invention, in the third step, sulfuric acid solution with the density of 1.08-1.20 g/cm3 is adopted for pickling, and the pickling time is 30-60 s.
In a preferred embodiment of the invention, in the fourth step, the step of polarization plate formation and curing further includes the following steps:
step A: placing the green plate which is just solidified in a solidification chamber under the normal temperature environment for 0.5-1.5 hours for normal temperature cooling;
and B: cooling the curing chamber of the opposite release polar plate, adjusting the temperature to 5-10 ℃, and simultaneously blowing by a fan for 2-3 hours;
and C: and (3) placing the green plate in the curing chamber in a room-temperature ventilation environment for 0.5-1 hour, and then brushing the sheets separately.
In a preferred embodiment of the invention, in the fourth step, the plate is polarized to form a cured state, and the curing step includes;
step 1: placing the positive electrode plate coated with the lead paste in a curing chamber with the temperature of 40-50 ℃ and the humidity of 98-100% for curing for 4-6 hours;
step 2: heating to 80-90 ℃, keeping the humidity at 98-100%, introducing oxygen-enriched air, keeping the pressure of a curing box at 0.4-0.6 MPa and the oxygen content at 35-40%, and curing for 4-6 hours;
and step 3: keeping the temperature in a curing chamber at 80-90 ℃, reducing the humidity to be less than or equal to 10%, introducing oxygen-enriched air, keeping the pressure of a curing box at-0.04 to-0.08 MPa, keeping the oxygen content at 35-40%, and drying for 6-10 hours;
as a preferable scheme of the invention, in the fourth step, the lead storage battery green plate is prepared; wherein the green plate comprises a positive green plate and a negative green plate; the positive and negative electrode plates and dilute sulphuric acid generate active substances through oxidation-reduction reaction under the action of direct current.
In the fifth step, the positive and negative plates for assembling the battery are formed by washing and drying, and finally, the separator is arranged between the positive and negative plates according to the principle of interval arrangement to assemble the electrode group and the electrode group into the battery shell.
In a preferred embodiment of the present invention, the assembly compression ratio of the pole group is not less than 30%.
As a preferable scheme of the invention, the dry paste amount of the positive plate is not less than 14.5g/Ah, and the dry paste amount of the negative plate is not less than 11 g/Ah.
In a preferred embodiment of the present invention, the mass ratio of the active material on the positive electrode plate to the active material on the negative electrode plate is 1:0.75 to 0.80.
In a preferred embodiment of the present invention, the weight ratio of the grid to the active material on each of the positive plate and the negative plate is 0.3:1, and the thickness of the separator is 1.06 mm.
The invention has the beneficial effects that:
1. aiming at changing a cooked polar plate into a polar plate, optimizing the acid solution formula of the battery, adopting a poor liquid type design, carrying out experimental analysis on the acid addition density, and optimizing the acid addition density; the acid amount in the positive and negative lead pastes is increased, the porosity of the polar plate is increased, and the high-current discharge performance is further improved.
2. The invention adds the gas phase silicon dioxide which is pretreated in the positive and negative polar plates, in order to improve the porosity of the polar plates, improve the acid liquor reserve capacity and the acid liquor supply capacity during discharging, and further improve the large-current discharging performance; and the short fibers and the selenium are added to improve the conductive performance of the active material of the polar plate. All aspects are synergistically improved, so that the prepared lead storage battery has better high-current discharge performance.
3. The invention aims at the adjustment of the battery material, tests and analyzes the charging current and the pulse time of the battery, optimizes the charging current and the pulse time of the battery, and carries out battery formation, thereby improving the battery capacity and prolonging the service life of the battery.
4. The invention adopts green plates to assemble 3-FM-4.5, and adopts different formation processes for 72 hours to carry out experimental verification; compared with the traditional lead-acid green plate battery processing technology, the time is shortened by about 30 hours compared with the traditional technology, the production period is shortened, the labor intensity of workers is reduced, the production efficiency is improved, and the production cost is reduced.
Detailed Description
The following describes the embodiments of the invention in detail.
Example 1:
a processing technology of a lead-acid green plate battery comprises the following steps:
step one, lead powder manufacturing: preparing the electrolytic lead into lead powder with composite requirements by oxidizing and screening a special lead powder machine;
step two, grid casting: casting the lead-antimony alloy and the lead-calcium alloy into a grid in a casting mode;
step three, preparing lead plaster: the lead powder comprises the following components in parts by weight of 100 parts: 100 parts of lead powder, 1.4g/cm32.5 parts of sulfuric acid, 19.3 parts of water, 0.1 part of fumed silica dispersion, 0.5 part of short fiber and 0.3 part of selenium; spraying under the pressure of 0.04-0.08 MPa, and then soaking in acid liquor; the pickling adopts a sulfuric acid solution with the density of 1.08-1.20 g/cm3, and the pickling time is 30 s.
Step four, pole plate formation; taking the polar plate out of the acid liquor on the basis of the third step, covering the surface of the polar plate with coated paper, stacking the polar plate and placing the polar plate in a curing chamber for curing to obtain the lead storage battery green polar plate; preparing the lead storage battery green plate; wherein the green plate comprises a positive green plate and a negative green plate; the positive and negative electrode plates and dilute sulphuric acid generate active substances through oxidation-reduction reaction under the action of direct current.
Assembling, namely assembling the polar plate with the closest weight on a lead-acid storage battery; obtaining a semi-finished product of the lead-acid green plate battery; the assembly specifically comprises the steps of forming a positive plate and a negative plate for battery assembly through cleaning and drying, and finally arranging a partition plate between the positive plate and the negative plate according to the interval arrangement principle to form a plate group and putting the plate group into a battery shell; the assembly compression ratio of the electrode group is not less than 30%, the dry paste amount of the positive plate is not less than 14.5g/Ah, the dry paste amount of the negative plate is not less than 11g/Ah, the mass ratio of active substances on the positive plate to active substances on the negative plate is 1:0.75, the weight ratio of a grid to the active substances on the positive plate and the negative plate is 0.3:1, and the thickness of the separator is 1.06 mm.
And step six, formation, namely adding acid to the semi-finished product, and then performing charging treatment, wherein the process is as follows:
(1) charging for the first time: charging the battery for 2 hours at a current of 1.5A;
(2) and (3) charging for the second time: charging the battery at 2.5A for 26 hours;
(3) and (3) charging for the third time: charging the battery for 10 hours at a current of 2A;
(4) fourth charging: charging the battery for 8 hours at a current of 1.5A;
(5) fifth charging: charging the battery for 8 hours at a current of 1A;
(6) and sixth charging: charging the battery for 1 hour at a constant voltage of 15V, and then pumping acid out of the battery, namely pumping free acid liquid in the battery;
(7) and (4) seventh charging: charging the battery for 8 hours at a current of 1.5A;
(8) and eighth charging: charging the battery for 9 hours at a current of 1.0A; and obtaining a finished product.
Specifically, in the fourth step, the step of pole plate formation and curing further comprises the following steps:
step A: placing the green plate which is just solidified in a solidification chamber under the normal temperature environment for 0.5-1.5 hours for normal temperature cooling;
and B: cooling the curing chamber of the opposite release polar plate, adjusting the temperature to 5-10 ℃, and simultaneously blowing by a fan for 2-3 hours;
and C: and (3) placing the green plate in the curing chamber in a room-temperature ventilation environment for 0.5-1 hour, and then brushing the sheets separately.
Specifically, in the fourth step, the plate is formed and cured, and the curing step comprises;
step 1: placing the positive electrode plate coated with the lead paste in a curing chamber with the temperature of 40 ℃ and the humidity of 98-100% for curing for 4 hours;
step 2: heating to 80 ℃, keeping the humidity at 98%, introducing oxygen-enriched air, keeping the pressure of a curing box at 0.4MPa and the oxygen content at 35%, and curing for 4-6 hours;
and step 3: keeping the temperature in the curing chamber at 80 ℃, reducing the humidity to be less than or equal to 10%, introducing oxygen-enriched air, keeping the pressure of the curing box at-0.04 MPa and the oxygen content at 35%, and drying for 6 hours;
aiming at changing a cooked polar plate into a polar plate, optimizing the acid solution formula of the battery, adopting a poor liquid type design, carrying out experimental analysis on the acid addition density, and optimizing the acid addition density; the acid amount in the positive and negative lead pastes is increased, the porosity of the polar plate is increased, and the high-current discharge performance is further improved.
Example 2:
a processing technology of a lead-acid green plate battery comprises the following steps:
step one, lead powder manufacturing: preparing the electrolytic lead into lead powder with composite requirements by oxidizing and screening a special lead powder machine;
step two, grid casting: casting the lead-antimony alloy and the lead-calcium alloy into a grid in a casting mode;
step three, preparing lead plaster: the lead powder comprises the following components in parts by weight of 100 parts: 100 parts of lead powder, 1.4g/cm32.5 parts of sulfuric acid, 19.3 parts of water, 0.25 part of fumed silica dispersion, 0.5 part of short fiber and 0.3 part of selenium; spraying under the pressure of 0.04-0.08 MPa, and then soaking in acid liquor; the pickling adopts sulfuric acid with the density of 1.08-1.20 g/cm3The pickling time of the solution is 40 s.
Step four, pole plate formation; taking the polar plate out of the acid liquor on the basis of the third step, covering the surface of the polar plate with coated paper, stacking the polar plate and placing the polar plate in a curing chamber for curing to obtain the lead storage battery green polar plate; preparing the lead storage battery green plate; wherein the green plate comprises a positive green plate and a negative green plate; the positive and negative electrode plates and dilute sulphuric acid generate active substances through oxidation-reduction reaction under the action of direct current.
Assembling, namely assembling the polar plate with the closest weight on a lead-acid storage battery; obtaining a semi-finished product of the lead-acid green plate battery; the assembly specifically comprises the steps of forming a positive plate and a negative plate for battery assembly through cleaning and drying, and finally arranging a partition plate between the positive plate and the negative plate according to the interval arrangement principle to form a plate group and putting the plate group into a battery shell; the assembly compression ratio of the electrode group is not lower than 30%, the dry paste amount of the positive plate is not less than 14.5g/Ah, the dry paste amount of the negative plate is not less than 11g/Ah, the mass ratio of active substances on the positive plate to active substances on the negative plate is 1: 0.75-0.80, the weight ratio of a grid and the active substances on the positive plate and the negative plate is 0.3:1, and the thickness of the separator is 1.06 mm.
And step six, formation, namely adding acid to the semi-finished product, and then performing charging treatment, wherein the process is as follows:
(1) charging for the first time: charging the battery for 2 hours at a current of 1.5A;
(2) and (3) charging for the second time: charging the battery at 2.5A for 26 hours;
(3) and (3) charging for the third time: charging the battery for 10 hours at a current of 2A;
(4) fourth charging: charging the battery for 8 hours at a current of 1.5A;
(5) fifth charging: charging the battery for 8 hours at a current of 1A;
(6) and sixth charging: charging the battery for 1 hour at a constant voltage of 15V, and then pumping acid out of the battery, namely pumping free acid liquid in the battery;
(7) and (4) seventh charging: charging the battery for 8 hours at a current of 1.5A;
(8) and eighth charging: charging the battery for 9 hours at a current of 1.0A; and obtaining a finished product.
Specifically, in the fourth step, the step of pole plate formation and curing further comprises the following steps:
step A: placing the green plate which is just solidified in a solidification chamber under the normal temperature environment for 0.5-1.5 hours for normal temperature cooling;
and B: cooling the curing chamber of the opposite release polar plate, adjusting the temperature to 5-10 ℃, and simultaneously blowing by a fan for 2-3 hours;
and C: and (3) placing the green plate in the curing chamber in a room-temperature ventilation environment for 0.5-1 hour, and then brushing the sheets separately.
Specifically, in the fourth step, the plate is formed and cured, and the curing step comprises;
step 1: placing the positive electrode plate coated with the lead plaster in a curing chamber with the temperature of 45 ℃ and the humidity of 99% for curing for 5 hours;
step 2: heating to 85 deg.C, maintaining humidity at 99%, introducing oxygen-enriched air to maintain the pressure of the curing box at 0.6MPa and oxygen content at 40%, and curing for 6 hr;
and step 3: keeping the temperature in the curing chamber at 90 ℃, reducing the humidity to be less than or equal to 10%, introducing oxygen-enriched air, keeping the pressure of the curing box at-0.07 MPa and the oxygen content at 38%, and drying for 7.5 hours;
the rest of this example can refer to example 1, and the processing technology is the same as example 1.
In this embodiment, on the basis of embodiment 2, the weight ratio of the fumed silica is increased from 0.1 to 0.25, so that the excellent properties of the fumed silica, such as good thixotropy, fluidity and thickening property, are fully released; the stability of the electrolyte is good, and the produced electrolyte does not have the phenomena of sedimentation, flocculation and layering for a long time; the corrosion of a grid can be reduced, the water loss can be inhibited, and the high-current charging and discharging and small self-discharging effect of the storage battery are good; the method aims to improve the porosity of the polar plate, improve the acid liquor reserve and the acid liquor supply capacity during discharging, and further improve the high-current discharging performance; and the short fibers and the selenium are added to improve the conductive performance of the active material of the polar plate. All aspects are synergistically improved, so that the prepared lead storage battery has better high-current discharge performance.
Example 3:
a processing technology of a lead-acid green plate battery comprises the following steps:
step one, lead powder manufacturing: preparing the electrolytic lead into lead powder with composite requirements by oxidizing and screening a special lead powder machine;
step two, grid casting: casting the lead-antimony alloy and the lead-calcium alloy into a grid in a casting mode;
step three, preparing lead plaster: the lead powder comprises the following components in parts by weight of 100 parts: 100 parts of lead powder, 1.4g/cm32.5 parts of sulfuric acid, 19.3 parts of water, 0.25 part of fumed silica dispersion, 0.5 part of short fiber and 0.3 part of selenium; spraying under the pressure of 0.04-0.08 MPa, and then soaking in acid liquor; the pickling adopts a sulfuric acid solution with the density of 1.08-1.20 g/cm3, and the pickling time is 40 s.
Step four, pole plate formation; taking the polar plate out of the acid liquor on the basis of the third step, covering the surface of the polar plate with coated paper, stacking the polar plate and placing the polar plate in a curing chamber for curing to obtain the lead storage battery green polar plate; preparing the lead storage battery green plate; wherein the green plate comprises a positive green plate and a negative green plate; the positive and negative electrode plates and dilute sulphuric acid generate active substances through oxidation-reduction reaction under the action of direct current.
Assembling, namely assembling the polar plate with the closest weight on a lead-acid storage battery; obtaining a semi-finished product of the lead-acid green plate battery; the assembly specifically comprises the steps of forming a positive plate and a negative plate for battery assembly through cleaning and drying, and finally arranging a partition plate between the positive plate and the negative plate according to the interval arrangement principle to form a plate group and putting the plate group into a battery shell; the assembly compression ratio of the electrode group is not lower than 30%, the dry paste amount of the positive plate is not less than 14.5g/Ah, the dry paste amount of the negative plate is not less than 11g/Ah, the mass ratio of active substances on the positive plate to active substances on the negative plate is 1: 0.75-0.80, the weight ratio of a grid and the active substances on the positive plate and the negative plate is 0.3:1, and the thickness of the separator is 1.06 mm.
And step six, formation, namely adding acid to the semi-finished product, and then performing charging treatment, wherein the process is as follows:
(1) charging for the first time: charging the battery for 2 hours at a current of 1.5A;
(2) and (3) charging for the second time: charging the battery at 2.5A for 26 hours;
(3) and (3) charging for the third time: charging the battery for 10 hours at a current of 2A;
(4) fourth charging: charging the battery for 8 hours at a current of 1.5A;
(5) fifth charging: charging the battery for 8 hours at a current of 1A;
(6) and sixth charging: charging the battery for 1 hour at a constant voltage of 15V, and then pumping acid out of the battery, namely pumping free acid liquid in the battery;
(7) and (4) seventh charging: charging the battery for 8 hours at a current of 1.5A;
(8) and eighth charging: charging the battery for 9 hours at a current of 1.0A; and obtaining a finished product.
Specifically, in the fourth step, the step of pole plate formation and curing further comprises the following steps:
step A: placing the green plate which is just solidified in a solidification chamber under the normal temperature environment for 0.5 hour for normal temperature cooling;
and B: cooling the curing chamber for releasing the polar plate, adjusting the temperature to 5 ℃, and simultaneously blowing by a fan for 2 hours;
and C: and (4) placing the green plate in the curing chamber in a room-temperature ventilation environment for 1 hour, and then brushing the sheet separately.
Specifically, in the fourth step, the plate is formed and cured, and the curing step comprises;
step 1: placing the positive electrode plate coated with the lead paste in a curing chamber with the temperature of 45 ℃ and the humidity of 98 percent for curing for 5 hours;
step 2: heating to 90 ℃, keeping the humidity at 98%, introducing oxygen-enriched air, keeping the pressure of a curing box at 0.4-0.6 MPa and the oxygen content at 35-40%, and curing for 5 hours;
and step 3: keeping the temperature in the curing chamber at 85 ℃, reducing the humidity to be less than or equal to 10 percent, introducing oxygen-enriched air, keeping the pressure of a curing box at-0.06 MPa and the oxygen content at 38 percent, and drying for 8 hours;
on the basis of the embodiment 2, the electrode plate is formed and cured for 18 hours, and the production efficiency is greatly improved compared with 48-96 hours in the prior art. Meanwhile, an oxygen-rich environment is maintained in the last two stages, the formation of a corrosion layer and the oxidation of free lead are accelerated, and the consistency of the quality of the polar plate is improved. After solidification, the content of free lead is 1.8%, the drop strength is increased by 40%, the consistency of the assembled battery is better, and the deep cycle life is prolonged by 30%.
Other contents of this embodiment can be referred to embodiment 1 or embodiment 2
Example 4:
a processing technology of a lead-acid green plate battery comprises the following steps:
step one, lead powder manufacturing: preparing the electrolytic lead into lead powder with composite requirements by oxidizing and screening a special lead powder machine;
step two, grid casting: casting the lead-antimony alloy and the lead-calcium alloy into a grid in a casting mode;
step three, preparing lead plaster: the lead powder comprises the following components in parts by weight of 100 parts: 100 parts of lead powder, 1.4g/cm33.0 parts of sulfuric acid, 20 parts of water, 0.15 part of fumed silica dispersion, 0.8 part of short fiber and 0.4 part of selenium, wherein the spraying pressure is 0.07MPa, and then pickling liquid is added; the pickling adopts a sulfuric acid solution with the density of 1.08-1.20 g/cm3, and the pickling time is 44 s.
Step four, pole plate formation; taking the polar plate out of the acid liquor on the basis of the third step, covering the surface of the polar plate with coated paper, stacking the polar plate and placing the polar plate in a curing chamber for curing to obtain the lead storage battery green polar plate; preparing the lead storage battery green plate; wherein the green plate comprises a positive green plate and a negative green plate; the positive and negative electrode plates and dilute sulphuric acid generate active substances through oxidation-reduction reaction under the action of direct current.
Assembling, namely assembling the polar plate with the closest weight on a lead-acid storage battery; obtaining a semi-finished product of the lead-acid green plate battery; the assembly specifically comprises the steps of forming a positive plate and a negative plate for battery assembly through cleaning and drying, and finally arranging a partition plate between the positive plate and the negative plate according to the interval arrangement principle to form a plate group and putting the plate group into a battery shell; the assembly compression ratio of the electrode group is not less than 30%, the dry paste amount of the positive plate is not less than 14.5g/Ah, the dry paste amount of the negative plate is not less than 11g/Ah, the mass ratio of active substances on the positive plate to active substances on the negative plate is 1:0.75, the weight ratio of a grid to the active substances on the positive plate and the negative plate is 0.3:1, and the thickness of the separator is 1.06 mm.
And step six, formation, namely adding acid to the semi-finished product, and then performing charging treatment, wherein the process is as follows:
(1) charging for the first time: charging the battery for 2 hours at a current of 1.5A;
(2) and (3) charging for the second time: charging the battery at 2.5A for 26 hours;
(3) and (3) charging for the third time: charging the battery for 10 hours at a current of 2A;
(4) fourth charging: charging the battery for 8 hours at a current of 1.5A;
(5) fifth charging: charging the battery for 8 hours at a current of 1A;
(6) and sixth charging: charging the battery for 1 hour at a constant voltage of 15V, and then pumping acid out of the battery, namely pumping free acid liquid in the battery;
(7) and (4) seventh charging: charging the battery for 8 hours at a current of 1.5A;
(8) and eighth charging: charging the battery for 9 hours at a current of 1.0A; and obtaining a finished product.
Specifically, in the fourth step, the step of pole plate formation and curing further comprises the following steps:
step A: placing the green plate which is just solidified in a solidification chamber under the normal temperature environment for 1.5 hours for normal temperature cooling;
and B: cooling the curing chamber for releasing the polar plate, adjusting the temperature to 10 ℃, and simultaneously blowing by a fan for 3 hours;
and C: and (4) placing the green plate in the curing chamber in a room-temperature ventilation environment for 0.5 hour, and then brushing the sheets separately.
Specifically, in the fourth step, the plate is formed and cured, and the curing step comprises;
step 1: placing the positive electrode plate coated with the lead paste in a curing chamber with the temperature of 45 ℃ and the humidity of 98 percent for curing for 4.5 hours;
step 2: heating to 88 ℃, keeping the humidity at 98%, introducing oxygen-enriched air, keeping the pressure of a curing box at 0.4MPa and the oxygen content at 36%, and curing for 5.5 hours;
and step 3: keeping the temperature in the curing chamber at 85 ℃, reducing the humidity to be less than or equal to 10 percent, introducing oxygen-enriched air, keeping the pressure of a curing box at-0.06 MPa and the oxygen content at 38 percent, and drying for 8 hours;
for other contents of this embodiment, reference may be made to embodiment 1, embodiment 2, or embodiment 3.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A processing technology of a lead-acid green plate battery is characterized by comprising the following steps:
step one, lead powder manufacturing: preparing the electrolytic lead into lead powder with composite requirements by oxidizing and screening a special lead powder machine;
step two, grid casting: casting the lead-antimony alloy and the lead-calcium alloy into a grid in a casting mode;
step three, preparing lead plaster: the lead powder comprises the following components in parts by weight of 100 parts: 100 parts of lead powder, 1.4g/cm32.5-4.2 parts of sulfuric acid, 19.3-20.5 parts of water, 0.1-0.5 part of fumed silica dispersion, 0.5-1 part of short fiber and 0.3-0.5 part of selenium; spraying under the pressure of 0.04-0.08 MPa, and then soaking in acid liquor;
step four, pole plate formation; taking the polar plate out of the acid liquor on the basis of the third step, covering the surface of the polar plate with coated paper, stacking the polar plate and placing the polar plate in a curing chamber for curing to obtain the lead storage battery green polar plate;
assembling, namely assembling the polar plate with the closest weight on a lead-acid storage battery; obtaining a semi-finished product of the lead-acid green plate battery;
and step six, formation, namely adding acid to the semi-finished product, and then performing charging treatment, wherein the process is as follows:
(1) charging for the first time: charging the battery for 2 hours at a current of 1.5A;
(2) and (3) charging for the second time: charging the battery at 2.5A for 26 hours;
(3) and (3) charging for the third time: charging the battery for 10 hours at a current of 2A;
(4) fourth charging: charging the battery for 8 hours at a current of 1.5A;
(5) fifth charging: charging the battery for 8 hours at a current of 1A;
(6) and sixth charging: charging the battery for 1 hour at a constant voltage of 15V, and then pumping acid out of the battery, namely pumping free acid liquid in the battery;
(7) and (4) seventh charging: charging the battery for 8 hours at a current of 1.5A;
(8) and eighth charging: charging the battery for 9 hours at a current of 1.0A; and obtaining a finished product.
2. The process for manufacturing a lead-acid green plate battery according to claim 1, wherein: in the third step, the pickling adopts a sulfuric acid solution with the density of 1.08-1.20 g/cm3, and the pickling time is 30-60 s.
3. The process for manufacturing a lead-acid green plate battery according to claim 1, wherein: in the fourth step, the step of pole plate formation and solidification further comprises the following steps:
step A: placing the green plate which is just solidified in a solidification chamber under the normal temperature environment for 0.5-1.5 hours for normal temperature cooling;
and B: cooling the curing chamber of the opposite release polar plate, adjusting the temperature to 5-10 ℃, and simultaneously blowing by a fan for 2-3 hours;
and C: and (3) placing the green plate in the curing chamber in a room-temperature ventilation environment for 0.5-1 hour, and then brushing the sheets separately.
4. The process for manufacturing a lead-acid green plate battery according to claim 1, wherein: in the fourth step, the plate is formed and cured, and the curing step comprises;
step 1: placing the positive electrode plate coated with the lead paste in a curing chamber with the temperature of 40-50 ℃ and the humidity of 98-100% for curing for 4-6 hours;
step 2: heating to 80-90 ℃, keeping the humidity at 98-100%, introducing oxygen-enriched air, keeping the pressure of a curing box at 0.4-0.6 MPa and the oxygen content at 35-40%, and curing for 4-6 hours;
and step 3: keeping the temperature in the curing chamber at 80-90 ℃, reducing the humidity to be less than or equal to 10%, introducing oxygen-enriched air, keeping the pressure of the curing box at-0.04 to-0.08 MPa, keeping the oxygen content at 35-40%, and drying for 6-10 hours.
5. The process for manufacturing a lead-acid green plate battery according to claim 1, wherein: in the fourth step, the lead storage battery green plate is prepared; wherein the green plate comprises a positive green plate and a negative green plate; the positive and negative electrode plates and dilute sulphuric acid generate active substances through oxidation-reduction reaction under the action of direct current.
6. The process for manufacturing a lead-acid green plate battery according to claim 1, wherein: and in the fifth step, the assembly specifically comprises the steps of forming a positive plate and a negative plate for assembling the battery through cleaning and drying, and finally arranging a partition plate between the positive plate and the negative plate according to the interval arrangement principle to form an electrode group and putting the electrode group into a battery shell.
7. The process for manufacturing a lead-acid green plate battery according to claim 6, wherein: the assembly compression ratio of the pole group is not lower than 30%.
8. The process for manufacturing a lead-acid green plate battery according to claim 6, wherein: the dry paste amount of the positive plate is not less than 14.5g/Ah, and the dry paste amount of the negative plate is not less than 11 g/Ah.
9. The process of claim 8, wherein the lead-acid green plate battery comprises the following steps: the mass ratio of the active substance on the positive plate to the active substance on the negative plate is 1: 0.75-0.80.
10. The process of claim 9, wherein the lead-acid green plate battery comprises the following steps: the weight ratio of the grid to the active substance on the positive plate and the negative plate is 0.3:1, and the thickness of the separator is 1.06 mm.
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| CN116706262A (en) * | 2023-06-30 | 2023-09-05 | 国网浙江省电力有限公司建设分公司 | Preparation process of bipolar horizontal battery |
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