CN114335445A - Preparation process of battery plate of high-cycle-performance lead-acid battery - Google Patents
Preparation process of battery plate of high-cycle-performance lead-acid battery Download PDFInfo
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- CN114335445A CN114335445A CN202110991932.7A CN202110991932A CN114335445A CN 114335445 A CN114335445 A CN 114335445A CN 202110991932 A CN202110991932 A CN 202110991932A CN 114335445 A CN114335445 A CN 114335445A
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- 239000002253 acid Substances 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 58
- 239000000956 alloy Substances 0.000 claims abstract description 58
- 238000003723 Smelting Methods 0.000 claims abstract description 27
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 27
- MCQCLFYYAUYINZ-UHFFFAOYSA-N [Sn].[La] Chemical compound [Sn].[La] MCQCLFYYAUYINZ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 25
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000003756 stirring Methods 0.000 claims abstract description 22
- ULGYAEQHFNJYML-UHFFFAOYSA-N [AlH3].[Ca] Chemical compound [AlH3].[Ca] ULGYAEQHFNJYML-UHFFFAOYSA-N 0.000 claims abstract description 20
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 13
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 10
- 239000011575 calcium Substances 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 229910052709 silver Inorganic materials 0.000 claims abstract description 4
- 239000004332 silver Substances 0.000 claims abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 229910021389 graphene Inorganic materials 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 229910001128 Sn alloy Inorganic materials 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 239000006259 organic additive Substances 0.000 claims description 6
- 239000002064 nanoplatelet Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 6
- 238000005260 corrosion Methods 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 8
- 239000010410 layer Substances 0.000 description 6
- 229910052761 rare earth metal Inorganic materials 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 230000019635 sulfation Effects 0.000 description 5
- 238000005670 sulfation reaction Methods 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- PIJPYDMVFNTHIP-UHFFFAOYSA-L lead sulfate Chemical compound [PbH4+2].[O-]S([O-])(=O)=O PIJPYDMVFNTHIP-UHFFFAOYSA-L 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention relates to a preparation process of a battery plate of a lead-acid battery with high cycle performance, wherein the battery plate of the lead-acid battery comprises a positive plate and a negative plate, and the preparation process of the positive plate comprises the following steps: step one, preparing a positive plate raw material, comprising: 0.07-0.10 part of calcium, 0.004-0.025 part of lanthanum, 1.4-1.5 parts of tin, 0.015-0.025 part of aluminum, 0.002-0.0025 part of silver and the balance of lead powder; step two, preparing a lanthanum-tin master alloy, wherein the lanthanum-tin master alloy comprises 20 weight percent of lanthanum and 80 weight percent of tin; step three, preparing a calcium-aluminum master alloy; step four, preparing a positive plate, adding lead powder into a smelting furnace, heating to be molten, and then sequentially adding a calcium-aluminum mother alloy, a lanthanum-tin mother alloy and the residual tin, and uniformly stirring to obtain a positive plate alloy; and preparing the positive plate alloy into the positive plate. The positive plate battery pole plate prepared by the invention has good corrosion resistance and high mechanical strength.
Description
Technical Field
The invention relates to the technical field of lead-acid batteries, in particular to a preparation process of a battery plate of a high-cycle-performance lead-acid battery.
Background
There are several causes of failure in the service life of lead acid batteries, among which the common causes are: (1) corrosion of the positive plate of the lead-acid battery; (2) sulfation of the negative plate. Specifically, the method comprises the following steps:
after the positive plate is corroded, lead oxide and salt substances are formed, so that the positive plate loses the functions of supporting active substances and conducting electricity, and the service life of the battery is influenced.
The negative active substance of the negative plate has a sulfation phenomenon, namely, the negative electrode generates irreversible large-particle crystal lead sulfate, and the conductive capacity of the negative plate of the battery is poor.
Both of these conditions will result in an impact on battery performance and battery life. Currently there is no effective solution in the prior art for the above.
Disclosure of Invention
Therefore, aiming at the problems, the invention provides a preparation process of a battery plate of a lead-acid battery with high cycle performance, alloy crystal grains of a positive plate prepared by the preparation process are refined, an alloy intercrystalline interlayer is thinned, and the permeation of sulfate ions in the lead-acid battery is reduced, so that the corrosion resistance of alloy of the positive plate is improved, and the refinement of the alloy crystal grains can improve the mechanical strength of the positive plate, so that the service life of the battery plate of the lead-acid battery is prolonged.
In order to achieve the purpose, the invention adopts the following technical scheme: a preparation process of a battery plate of a high-cycle-performance lead-acid battery comprises a positive plate and a negative plate, and comprises the following steps:
step one, preparing a positive plate raw material, comprising: 0.07-0.10 part of calcium, 0.004-0.025 part of lanthanum, 1.4-1.5 parts of tin, 0.015-0.025 part of aluminum, 0.002-0.0025 part of silver and the balance of lead powder;
preparing a lanthanum-tin master alloy, wherein the lanthanum-tin master alloy comprises 20 weight percent of lanthanum and 80 weight percent of tin;
the method comprises the following substeps:
S1putting part of the tin prepared in the first step into a smelting furnace and heating until the tin is molten;
S2slowly adding the lanthanum prepared in the step one into a smelting furnace, and uniformly stirring while adding until the lanthanum is completely melted into a tin solution to obtain a lanthanum-tin alloy solution;
taking out the lanthanum-tin alloy solution, and cooling to prepare the required lanthanum-tin master alloy;
step three, preparing the calcium-aluminum master alloy, which comprises the following substeps:
S3adding the aluminum prepared in the step one into a smelting furnace to be heated until the aluminum is molten;
S4then adding calcium into the smelting furnace, and stirring while adding until the calcium is molten into the aluminum solution to obtain a calcium-aluminum alloy solution;
taking out the calcium-aluminum alloy solution, and cooling to prepare a calcium-aluminum master alloy;
step four, preparing the positive plate, comprising the following substeps:
S5adding the lead powder prepared in the step one into a smelting furnace to be heated until the lead powder is molten;
S6then adding the calcium-aluminum master alloy into the smelting furnace, and stirring while adding until the calcium-aluminum master alloy is melted into the lead solution;
S7adding the lanthanum-tin master alloy into a smelting furnace while stirring until the lanthanum-tin master alloy is molten into a lead solution;
S8finally, adding the residual tin into the smelting furnace and uniformly stirring to obtain the positive plate alloy of the lead-acid battery;
S9and solidifying and cooling the alloy of the positive plate according to the shape of the positive plate to obtain the positive plate of the lead-acid battery.
Further, the above substep S1In the method, tin is put into a melting furnace and heated to 700 ℃ to melt the tin.
Further, the above substep S5Adding the lead prepared in the first step into a smelting furnace, and heating to 600 ℃ to melt the lead.
Further, the preparation process of the negative plate comprises the following steps of:
a. preparing a negative plate raw material, comprising: 0.1 part of fiber, 0.6-1.5 parts of organic additive, 4.5 parts of multilayer graphene microchip, 10 parts of dilute sulfuric acid, 12 parts of deionized water and the balance of lead powder with the oxidation degree of 71%;
b. b, putting the lead powder prepared in the step a, the organic additive and the multilayer graphene microchip 4 into a paste mixing machine, and stirring for 5-10min to mix uniformly;
c. adding deionized water, and wet stirring for 5-10 min;
d. adding dilute sulfuric acid, controlling the acid adding speed, and adding acid for 15 min; simultaneously starting a cooling system of the paste mixing machine to ensure that the temperature in the paste mixing machine does not exceed 65 ℃ in the paste mixing process;
e. adding a proper amount of deionized water for regulation to obtain the apparent density of 4.65g/cm3The paste discharging temperature of the negative lead paste is not more than 40 ℃;
f. and coating the negative lead paste on the surface of the negative grid plate, solidifying and cooling to obtain the negative plate of the lead-acid battery.
Further, the density of the dilute sulfuric acid is 1.4g/cm3。
Further, the bulk density of the multilayer graphene microchip is 0.06-0.09g/cm3。
By adopting the technical scheme, the invention has the beneficial effects that:
the positive plate prepared by the preparation process of the battery plate of the lead-acid battery with high cycle performance has the following advantages:
the positive plate adopts lanthanum rare earth element alloy, so that alloy grains of the alloy of the positive plate are refined, and an interlayer between alloy grains is thinned. The corrosion of metal is generally that the grain boundary is most easily corroded, lanthanum rare earth element enables the grain of the lanthanum rare earth element to be refined, the thickness of the grain boundary layer is reduced, and the penetration of sulfate ions in the lead-acid battery is reduced, so that the corrosion resistance of the alloy of the positive plate is improved, and the mechanical strength of the alloy of the positive plate can be improved by refining the alloy grain.
The negative plate has the following advantages:
the negative plate is added with a certain proportion of porous multi-layer graphene nanoplatelets with high specific surface area, so that the conductive capacity and the dispersing capacity of the negative plate are good, thick lead sulfate crystal grains in the negative plate are doped with the multi-layer graphene nanoplatelets with good conductive capacity, the sulfation phenomenon of the negative electrode of the battery can be greatly reduced and avoided, the conductive performance is improved, the large-current discharge and power output of the battery are facilitated, and the charge acceptance of the negative plate is improved.
The service life of the battery is prolonged by inhibiting the sulfation phenomenon of the negative plate of the battery and improving the corrosion resistance of the positive plate grid.
Detailed Description
The invention will now be further described with reference to specific embodiments.
The first embodiment is as follows:
the embodiment provides a preparation process of a battery polar plate of a high-cycle-performance lead-acid battery, wherein the battery polar plate comprises a positive plate and a negative plate.
The preparation process of the positive plate comprises the following steps:
step one, preparing a positive plate raw material, comprising: 0.07-0.10 part of calcium, 0.004-0.025 part of lanthanum, 1.4-1.5 parts of tin, 0.015-0.025 part of aluminum, 0.002-0.0025 part of silver and the balance of lead powder;
the lead powder comprises more than 99.2 percent of lead by weight, and also comprises bismuth, zinc, iron, arsenic, copper, nickel, cadmium and the like.
Preparing a lanthanum-tin master alloy, wherein the lanthanum-tin master alloy comprises 20 weight percent of lanthanum and 80 weight percent of tin;
the method comprises the following substeps:
S1putting part of the tin prepared in the first step into a smelting furnace, and heating to 700 ℃ to melt the tin;
S2and slowly adding the lanthanum prepared in the step one into a smelting furnace, wherein the lanthanum has poor dispersity and high melting point, so that the lanthanum cannot be directly melted and fused with lead. Therefore, lanthanum and tin are firstly melted into lanthanum-tin alloy solution. Forming a lanthanum-tin bonding interface between the lanthanum surface and tin, so that lanthanum can be rapidly melted, and uniformly stirring while adding until the lanthanum is completely melted into a tin solution to obtain a lanthanum-tin alloy solution;
taking out the lanthanum-tin alloy solution, and cooling to prepare the required lanthanum-tin master alloy;
step three, preparing the calcium-aluminum master alloy, which comprises the following substeps:
S3adding the aluminum prepared in the step one into a smelting furnace to be heated until the aluminum is molten;
S4then adding calcium into the smelting furnace, and stirring while adding until the calcium is molten into the aluminum solution to obtain a calcium-aluminum alloy solution;
taking out the calcium-aluminum alloy solution, and cooling to prepare a calcium-aluminum master alloy;
step four, preparing the positive plate, comprising the following substeps:
S5adding the lead powder prepared in the first step into a smelting furnace, and heating to 600 ℃ to melt the lead powder;
S6then adding the calcium-aluminum master alloy into the smelting furnace, and stirring while adding until the calcium-aluminum master alloy is melted into the lead solution;
S7adding the lanthanum-tin master alloy into a smelting furnace while stirring until the lanthanum-tin master alloy is molten into a lead solution;
S8finally, adding the residual tin into the smelting furnace and uniformly stirring to obtain the positive plate alloy of the lead-acid battery;
S9and solidifying and cooling the alloy of the positive plate according to the shape of the positive plate to obtain the positive plate of the lead-acid battery.
The positive plate prepared by the preparation process of the battery plate of the lead-acid battery with high cycle performance has the following advantages:
the positive plate adopts lanthanum rare earth element alloy, so that alloy grains of the alloy of the positive plate are refined, and an interlayer between alloy grains is thinned. The corrosion of metal is generally that the grain boundary is most easily corroded, lanthanum rare earth element enables the grain of the lanthanum rare earth element to be refined, the thickness of the grain boundary layer is reduced, and the penetration of sulfate ions in the lead-acid battery is reduced, so that the corrosion resistance of the alloy of the positive plate is improved, and the mechanical strength of the alloy of the positive plate can be improved by refining the alloy grain.
Example two:
the embodiment discloses a preparation process of a negative plate, and the negative plate comprises a negative grid plate and negative lead paste coated on the surface of the negative grid plate.
The preparation process of the negative plate comprises the following steps:
a. preparing a negative plate raw material, comprising: 0.1 part of fiber, 0.6-1.5 parts of organic additive, 4.5 parts of multilayer graphene microchip, 10 parts of dilute sulfuric acid, 12 parts of deionized water and the balance of lead powder with the oxidation degree of 71%;
the density of the dilute sulfuric acid is 1.4g/cm3；
The bulk density of the multilayer graphene microchip is 0.06-0.09g/cm3；
b. B, putting the lead powder prepared in the step a, the organic additive and the multilayer graphene microchip 4 into a paste mixing machine, and stirring for 5-10min to mix uniformly;
c. adding deionized water, and wet stirring for 5-10 min;
d. adding dilute sulfuric acid, controlling the acid adding speed, and adding acid for 15 min; simultaneously starting a cooling system of the paste mixing machine to ensure that the temperature in the paste mixing machine does not exceed 65 ℃ in the paste mixing process;
e. adding a proper amount of deionized water for regulation to obtain the apparent density of 4.65g/cm3The paste discharging temperature of the negative lead paste is not more than 40 ℃;
f. and coating the negative lead paste on the surface of the negative grid plate, solidifying and cooling to obtain the negative plate of the lead-acid battery.
The negative plate is added with a certain proportion of porous multi-layer graphene nanoplatelets with high specific surface area, so that the conductive capacity and the dispersing capacity of the negative plate are good, thick lead sulfate crystal grains in the negative plate are doped with the multi-layer graphene nanoplatelets with good conductive capacity, the sulfation phenomenon of the negative electrode of the battery can be greatly reduced and avoided, the conductive performance is improved, the large-current discharge and power output of the battery are facilitated, and the charge acceptance of the negative plate is improved.
The positive plate and the negative plate prepared by the preparation process of the battery plate of the lead-acid battery with high cycle performance are applied to the lead-acid battery, so that the charging and discharging times of the lead-acid battery can be effectively improved, and the service life of the lead-acid battery is prolonged.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A preparation process of battery plates of a high-cycle-performance lead-acid battery comprises a positive plate and a negative plate, and is characterized in that the preparation process of the positive plate comprises the following steps:
step one, preparing a positive plate raw material, comprising: 0.07-0.10 part of calcium, 0.004-0.025 part of lanthanum, 1.4-1.5 parts of tin, 0.015-0.025 part of aluminum, 0.002-0.0025 part of silver and the balance of lead powder;
preparing a lanthanum-tin master alloy, wherein the lanthanum-tin master alloy comprises 20 weight percent of lanthanum and 80 weight percent of tin;
the method comprises the following substeps:
S1putting part of the tin prepared in the first step into a smelting furnace and heating until the tin is molten;
S2slowly adding the lanthanum prepared in the step one into a smelting furnace, and uniformly stirring while adding until the lanthanum is completely melted into a tin solution to obtain a lanthanum-tin alloy solution;
taking out the lanthanum-tin alloy solution, and cooling to prepare the required lanthanum-tin master alloy;
step three, preparing the calcium-aluminum master alloy, which comprises the following substeps:
S3adding the aluminum prepared in the step one into a smelting furnace to be heated until the aluminum is molten;
S4then adding calcium into the smelting furnace, and stirring while adding until the calcium is molten into the aluminum solution to obtain a calcium-aluminum alloy solution;
taking out the calcium-aluminum alloy solution, and cooling to prepare a calcium-aluminum master alloy;
step four, preparing the positive plate, comprising the following substeps:
S5adding the lead powder prepared in the step one into a smelting furnace to be heated until the lead powder is molten;
S6then adding the calcium-aluminum master alloy into the smelting furnace, and stirring while adding until the calcium-aluminum master alloy is melted into the lead solution;
S7adding the lanthanum-tin master alloy into a smelting furnace while stirring until the lanthanum-tin master alloy is molten into a lead solution;
S8finally, adding the residual tin into the smelting furnace and uniformly stirring to obtain the positive plate alloy of the lead-acid battery;
S9and solidifying and cooling the alloy of the positive plate according to the shape of the positive plate to obtain the positive plate of the lead-acid battery.
2. The process for preparing battery plates of a high-cycle-performance lead-acid battery according to claim 1, wherein the process comprises the following steps:
the above substep S1In the method, tin is put into a melting furnace and heated to 700 ℃ to melt the tin.
3. The process for preparing battery plates of a high-cycle-performance lead-acid battery according to claim 1 or 2, wherein:
the above substep S5Adding the lead prepared in the first step into a smelting furnace, and heating to 600 ℃ to melt the lead.
4. The process for preparing battery plate of high-cycle-performance lead-acid battery as claimed in claim 1, further comprising the process for preparing negative plate, wherein the negative plate comprises negative grid plate and negative lead paste coated on the surface of the negative grid plate, comprising the following steps:
a. preparing a negative plate raw material, comprising: 0.1 part of fiber, 0.6-1.5 parts of organic additive, 4.5 parts of multilayer graphene microchip, 10 parts of dilute sulfuric acid, 12 parts of deionized water and the balance of lead powder with the oxidation degree of 71%;
b. b, putting the lead powder prepared in the step a, the organic additive and the multilayer graphene nanoplatelets 4 into a paste mixing machine, and stirring for 5-10min to mix uniformly;
c. adding deionized water, and wet stirring for 5-10 min;
d. adding dilute sulfuric acid, controlling the acid adding speed, and adding acid for 15 min; simultaneously starting a cooling system of the paste mixing machine to ensure that the temperature in the paste mixing machine does not exceed 65 ℃ in the paste mixing process;
e. adding a proper amount of deionized water for regulation to obtain the apparent density of 4.65g/cm3The paste discharging temperature of the negative lead paste is not more than 40 ℃;
f. and coating the negative lead paste on the surface of the negative grid plate, solidifying and cooling to obtain the negative plate of the lead-acid battery.
5. The process for preparing battery plates of a high-cycle-performance lead-acid battery according to claim 4, wherein the process comprises the following steps:
the density of the dilute sulfuric acid is 1.4g/cm3。
6. The process for preparing battery plates of a high-cycle-performance lead-acid battery according to claim 5, wherein the process comprises the following steps:
the bulk density of the multilayer graphene microchip is 0.06-0.09g/cm3。
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