CN116053462A - Auxiliary battery lead paste formula suitable for pure electric new energy automobile and manufacturing method - Google Patents
Auxiliary battery lead paste formula suitable for pure electric new energy automobile and manufacturing method Download PDFInfo
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- CN116053462A CN116053462A CN202210802208.XA CN202210802208A CN116053462A CN 116053462 A CN116053462 A CN 116053462A CN 202210802208 A CN202210802208 A CN 202210802208A CN 116053462 A CN116053462 A CN 116053462A
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- battery
- acid
- negative electrode
- lead
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000011505 plaster Substances 0.000 claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000002253 acid Substances 0.000 claims abstract description 62
- 238000000034 method Methods 0.000 claims abstract description 43
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 21
- 238000003860 storage Methods 0.000 claims abstract description 17
- 239000003792 electrolyte Substances 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims description 56
- 238000005507 spraying Methods 0.000 claims description 28
- 238000001816 cooling Methods 0.000 claims description 26
- 238000003466 welding Methods 0.000 claims description 24
- 239000011248 coating agent Substances 0.000 claims description 21
- 238000000576 coating method Methods 0.000 claims description 21
- 238000001035 drying Methods 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 19
- 210000004027 cell Anatomy 0.000 claims description 16
- 239000013078 crystal Substances 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 15
- 239000000835 fiber Substances 0.000 claims description 14
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 14
- 238000005303 weighing Methods 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 7
- 229910000361 cobalt sulfate Inorganic materials 0.000 claims description 7
- 229940044175 cobalt sulfate Drugs 0.000 claims description 7
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 7
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 7
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 7
- 235000011151 potassium sulphates Nutrition 0.000 claims description 7
- RZLVQBNCHSJZPX-UHFFFAOYSA-L zinc sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Zn+2].[O-]S([O-])(=O)=O RZLVQBNCHSJZPX-UHFFFAOYSA-L 0.000 claims description 7
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 238000000498 ball milling Methods 0.000 claims description 2
- 239000003575 carbonaceous material Substances 0.000 claims description 2
- 210000005056 cell body Anatomy 0.000 claims description 2
- 239000004021 humic acid Substances 0.000 claims description 2
- 229920005610 lignin Polymers 0.000 claims description 2
- 238000011068 loading method Methods 0.000 claims 2
- 238000005868 electrolysis reaction Methods 0.000 claims 1
- 238000011049 filling Methods 0.000 claims 1
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 239000002000 Electrolyte additive Substances 0.000 abstract description 14
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000008151 electrolyte solution Substances 0.000 abstract description 2
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 2
- 239000001257 hydrogen Substances 0.000 abstract description 2
- PIJPYDMVFNTHIP-UHFFFAOYSA-L lead sulfate Chemical compound [PbH4+2].[O-]S([O-])(=O)=O PIJPYDMVFNTHIP-UHFFFAOYSA-L 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000005538 encapsulation Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 18
- 238000011161 development Methods 0.000 description 5
- 239000002003 electrode paste Substances 0.000 description 5
- 230000007774 longterm Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000019635 sulfation Effects 0.000 description 1
- 238000005670 sulfation reaction Methods 0.000 description 1
Classifications
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/56—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of lead
- H01M4/57—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of lead of "grey lead", i.e. powders containing lead and lead oxide
-
- 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
- H01M10/08—Selection of materials as electrolytes
-
- 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
-
- 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
-
- 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
-
- 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
An auxiliary battery lead paste formula suitable for a pure electric new energy automobile and a manufacturing method thereof are provided, wherein an EFS-C carbon-coated PE separator is adopted for pole group encapsulation in the manufacturing method, so that the internal resistance of the battery is reduced, and the surface conductivity of a pole plate is improved. The dilute sulfuric acid electrolyte of the secondary acid adding process of battery formation is added with 20% -40% of multifunctional electrolyte additive, so that the conductivity of the sulfuric acid electrolyte solution is improved, the solubility of lead sulfate is increased, the charging acceptance is improved, the hydrogen evolution potential of a negative plate is improved, the water loss speed in the life cycle process of the battery is reduced, and the cycle life of the storage battery is prolonged. The storage battery produced by adopting the positive and negative electrode lead plaster formula and the manufacturing process has the characteristics of excellent charge acceptance and long cycle life under partial charge state, and meets the use requirements of pure electric new energy automobiles.
Description
Technical Field
The invention relates to a formula and a manufacturing process of auxiliary battery lead plaster.
Background
The development prospect of the new energy automobile is 2025, the average power consumption of the new automobile of the pure electric passenger automobile is reduced to 12.0 kilowatt-hour/hundred kilometers, the sales volume of the new energy automobile reaches about 20% of the total sales volume of the new automobile, and the commercial application of the high-automatic driving automobile in a limited area and a specific scene is realized.
By 2035, pure electric vehicles become the main stream of new sales vehicles, vehicles in the public field are fully motorized, fuel cell vehicles are commercially applied, and highly-automatic driving vehicles are applied in a large scale, so that the energy conservation and emission reduction level and the improvement of social operation efficiency are effectively promoted.
With the rapid promotion of sales of new energy vehicles, the battery is taken as an indispensable part of the new energy vehicle, namely a low-voltage auxiliary battery. EV electric vehicles have high power consumption if they convert high voltage into 12V by DC-DC power for vehicle-mounted electric accessories, and therefore have low-voltage auxiliary batteries. The method is mainly used for starting the high-voltage control system and supplying power to part of low-voltage electric appliances. Low voltage auxiliary batteries are also a part of important consideration in the development of large and new energy automobile main engine factories. The low-voltage auxiliary battery of the new energy automobile has huge market prospect and demand.
At present, many new energy automobile factories directly use an original fuel automobile starting storage battery as a new energy automobile low-voltage auxiliary battery. Because the whole charging and discharging strategy, the electricity utilization strategy and the working environment of the new energy automobile and the conventional fuel oil automobile are different from those of the fuel oil automobile, more problems are caused in the actual use process of the new energy automobile.
(1) Low charging voltage and short time, and the low-voltage auxiliary battery is short of long-term charging, so that the power shortage is caused:
considering the endurance mileage of the new energy vehicle, part of host factories can reduce the charging voltage of DCDC conversion, and the design charging voltage of the mainstream new energy vehicle in the passenger vehicle market is between 13.5 and 14.2V, which is lower than that of the fuel vehicle (14 to 14.8V). Meanwhile, besides operating vehicles, the EV new energy automobile mainly runs in a short time in the city, the charging time is short, and the auxiliary battery is not fully charged for a long time.
(2) Long-term deep discharge and undercharge lead to low-voltage auxiliary battery power deficiency:
because the vehicle type of a part of host factories in the new energy automobile industry is not provided with an intelligent power supply system or the set intelligent power supply early warning SOC is too low, the recovery is difficult after the auxiliary battery is deeply discharged, meanwhile, when the SOC of the low-voltage auxiliary battery is higher than a set threshold value, DC/DC can not work, the low-voltage auxiliary battery is used for supplying power, the auxiliary battery can work in a range of 60-80% in long-term SOC, and the service life of the low-voltage auxiliary battery is attenuated due to long-term deep discharge and insufficient charging;
(3) the dark current of the whole vehicle is large, so that the battery is deficient:
along with the development trend of the intellectualization and the comfort of new energy automobiles, the functions of electric appliances are more and more, the dark current of the whole automobile is larger, the low-voltage auxiliary battery is difficult to recover after long-term small-current deep discharge, and the requirements on the deep discharge recovery and the cycle life of the low-voltage auxiliary battery are increasingly improved.
The conventional fuel vehicle starting storage battery is not suitable for the use conditions of the pure electric new energy vehicle any more, and needs to be subjected to applicability development so as to meet the development requirements of the new energy vehicle.
Based on the background, the invention provides an auxiliary battery lead plaster formula and a manufacturing process suitable for a pure electric new energy automobile.
Disclosure of Invention
The invention aims to solve the problems of poor low-voltage charging acceptance performance and poor cycle life performance under partial charge state of the existing automobile starting battery, and provides an auxiliary battery lead plaster formula suitable for a pure electric new energy automobile and a manufacturing method thereof.
The technical scheme of the invention is as follows: the auxiliary battery lead plaster formula suitable for the pure electric new energy automobile comprises the following components in parts by weight:
the formula of the positive electrode lead plaster comprises the following components in parts by weight:
the negative electrode lead plaster comprises the following components in parts by weight:
preferably, the P-40 seed crystal is 4 PbO.PbSO 4 With Sb 2 O 3 The composite crystal formed after ball milling is carried out according to the weight ratio of (6+/-0.5) to (1+/-0.2), the grain diameter of the composite crystal is 3-5 mu m, and the novel crystal avoids the independent addition of Sb 2 O 3 Inhibition of 4BS growth in the plate.
Preferably, the SLI-A100 negative electrode auxiliary material comprises the following components in percentage by weight: norway HT-1/1 lignin: humic acid= (6±0.5): (1±0.2): (1.+ -. 0.2). The negative plate adopting the proportion and the adding proportion has excellent charge acceptance performance, and can effectively relieve sulfation of the negative electrode after deep discharge.
The auxiliary battery manufacturing process comprises the following steps of:
weighing the raw materials according to the weight parts of the positive electrode formula.
1) Firstly, uniformly stirring and mixing the P-40 seed crystal, the ultrashort fiber and the lead powder, spraying pure water accounting for 20-30% of the total mass of the pure water, controlling the spraying time to be 1-2 min, and stirring for 5-10 min;
2) Adding the rest pure water, controlling the water adding time to be 3-4 min, and continuously stirring for 5-10 min;
3) Then 1.38g/cm was added 3 The dilute sulfuric acid solution is added with acid for 8-12 min, and the temperature is kept for 5-10 min;
4) And finally, opening a cooling system, continuously stirring, and cooling to 45 ℃ to obtain the positive lead plaster.
The process of the negative electrode and the paste comprises the following steps:
weighing raw materials according to the weight parts of the cathode formula.
1) Firstly, uniformly stirring and mixing the composite carbon, SLI-A100 negative electrode auxiliary material package, ultrashort fibers and lead powder, spraying pure water accounting for 20-30% of the total mass of the pure water, controlling the spraying time to be 1-2 min, and stirring for 5-10 min;
2) Adding the rest pure water, controlling the water adding time to be 3-4 min, and continuously stirring for 5-10 min;
3) Then 1.38g/cm was added 3 The dilute sulfuric acid solution is added with acid for 8-12 min, and the temperature is kept for 5-10 min;
4) Finally, a cooling system is opened, stirring is continued, and the temperature is reduced to 45 ℃ to obtain the negative electrode lead plaster;
and transferring the lead plaster into a plaster coating bucket, uniformly coating the lead plaster on the surface of a lead net by a plaster coating machine, cutting the lead net to produce a single wet polar plate, rapidly drying the single wet polar plate by a drying kiln, transferring the single wet polar plate into a curing chamber, and curing the single wet polar plate into a dry green plate by a curing process.
The anode group is encapsulated by adopting an EFS-C carbon-coated PE separator;
the battery is assembled by adopting a COS cast-in-place welder, the end parts of the electrode group lugs which are encapsulated and assembled are immersed into a mould containing molten lead liquid, and the positive and negative electrode plate lugs are cast-welded and connected in parallel together rapidly. And then the welded electrode group is put into a battery tank, high current is applied to the connecting pieces of the positive electrode group and the negative electrode group through a clamp of a wall penetrating welding machine, the connecting pieces are locally melted, the pressure is kept for 3-5s, the adjacent connecting pieces are welded together, then the adjacent connecting pieces are distributed and put into each single cell of the battery tank body, the electrode group is subjected to butt welding by adopting a butt welding process, and then the large cover is subjected to heat sealing.
And (3) battery formation: 1.190g/cm of acid is added at one time 3 Adding acid into dilute sulfuric acid solution, and charging by conventional formation charging processCharging and forming, pouring acid and adding acid for the second time after the formation is finished, adding 20% -40% of multifunctional electrolyte additive into dilute sulfuric acid for the second time, wherein the acid for the second time adopts 1.19g/cm 3 And 1.300g/cm 3 The multifunctional electrolyte additive comprises the following components in parts by weight: zinc sulfate heptahydrate: cobalt sulfate: potassium sulfate: pure water= (1±0.1): (1±0.1): (1±0.1): (5+/-0.5), adding acid to each cell of the storage battery cell body for the second time, adjusting the liquid level height, and simultaneously ensuring the mixed acid density of the electrolyte to be 1.280+/-0.005 g/cm 3 And finally, carrying out heat sealing on the small cover, detecting air tightness, and finally carrying out heavy current detection and battery cleaning and drying.
The EFS-C carbon-coated PE separator is an EFS-C carbon-coated bag type PE separator, and the surface of the EFS-C carbon-coated PE separator is coated with a layer of carbon material.
The beneficial effects of the invention are as follows: the auxiliary battery prepared by adopting the lead plaster formula and the preparation process has the characteristics of good low-voltage charge acceptance performance and long cycle life under partial charge state, and meets the use requirements of the pure electric new energy automobile.
The inventor finds that 20% -40% of multifunctional electrolyte additive is added into dilute sulfuric acid electrolyte in the secondary acid adding process of battery formation, so that the conductivity of sulfuric acid electrolyte solution is improved, the solubility of lead sulfate is increased, the charge acceptance is improved, and meanwhile, the hydrogen evolution potential of a negative plate is improved, the water loss speed in the life cycle process of the battery is reduced, and the cycle life of the storage battery is prolonged. The storage battery produced by adopting the positive and negative electrode lead plaster formula and the manufacturing process has the characteristics of excellent low-voltage charge acceptance performance and long cycle life under partial charge state
Detailed Description
Example 1
An auxiliary battery lead plaster formula and a manufacturing process suitable for a pure electric new energy automobile comprise the following components in parts by weight:
the negative electrode lead plaster comprises the following components in parts by weight:
positive electrode paste mixing process:
weighing the raw materials according to the weight parts of the positive electrode formula.
1) Firstly, uniformly stirring and mixing the P-40 seed crystal, the ultrashort fiber and the lead powder, spraying pure water accounting for 20-30% of the total mass of the pure water, controlling the spraying time to be 1-2 min, and stirring for 5-10 min;
2) Adding the rest pure water, controlling the water adding time to be 3-4 min, and continuously stirring for 5-10 min;
3) Then adding 1.38g/cm3 dilute sulfuric acid solution, controlling the acid adding time to be 8-12 min, and keeping the temperature for 5-10 min;
4) And finally, opening a cooling system, continuously stirring, and cooling to 45 ℃ to obtain the positive lead plaster.
The process of the negative electrode and the paste comprises the following steps:
weighing raw materials according to the weight parts of the cathode formula.
1) Firstly, uniformly stirring and mixing the composite carbon, SLI-A100 negative electrode auxiliary material package, ultrashort fibers and lead powder, spraying pure water accounting for 20-30% of the total mass of the pure water, controlling the spraying time to be 1-2 min, and stirring for 5-10 min;
2) Adding the rest pure water, controlling the water adding time to be 3-4 min, and continuously stirring for 5-10 min;
3) Then adding 1.38g/cm3 dilute sulfuric acid solution, controlling the acid adding time to be 8-12 min, and keeping the temperature for 5-10 min;
4) And finally, opening a cooling system, continuously stirring, and cooling to 45 ℃ to obtain the negative electrode lead plaster.
And transferring the lead plaster into a plaster coating bucket, uniformly coating the lead plaster on the surface of a lead net by a plaster coating machine, cutting the lead net to produce a single wet polar plate, rapidly drying the single wet polar plate by a drying kiln, transferring the single wet polar plate into a curing chamber, and curing the single wet polar plate into a dry green plate by a curing process.
The electrode group is encapsulated by adopting an EFS-C carbon-coated bag type PE separator to encapsulate the cathode;
the battery is assembled by adopting a COS cast-in-place welder, the end parts of the electrode group lugs which are encapsulated and assembled are immersed into a mould containing molten lead liquid, and the positive and negative electrode plate lugs are cast-welded and connected in parallel together rapidly. And then the welded electrode group is put into a battery tank, high current is applied to the connecting pieces of the positive electrode group and the negative electrode group through a clamp of a wall penetrating welding machine, the connecting pieces are locally melted, the pressure is kept for 3-5s, the adjacent connecting pieces are welded together, then the adjacent connecting pieces are distributed and put into each single cell of the battery tank body, the electrode group is subjected to butt welding by adopting a butt welding process, and then the large cover is subjected to heat sealing.
And (3) battery formation: 1.190g/cm of acid is added at one time 3 Adding acid into dilute sulfuric acid solution, charging by conventional formation charging process, pouring acid after formation, adding 20% multifunctional electrolyte additive into dilute sulfuric acid, and adding 1.19g/cm acid 3 And 1.300g/cm 3 The multifunctional electrolyte additive comprises the following components in parts by weight: zinc sulfate heptahydrate: cobalt sulfate: potassium sulfate: pure water=1:1:1:5, secondary acid addition is carried out on each cell of the storage battery tank body, the liquid level height is adjusted, and meanwhile, the mixed acid density of the electrolyte is ensured to be 1.280+/-0.005 g/cm 3 And finally, carrying out heat sealing on the small cover, detecting air tightness, and finally carrying out heavy current detection and battery cleaning and drying.
Example 2
An auxiliary battery lead plaster formula and a manufacturing process suitable for a pure electric new energy automobile comprise the following components in parts by weight:
the negative electrode lead plaster comprises the following components in parts by weight:
positive electrode paste mixing process:
weighing the raw materials according to the weight parts of the positive electrode formula.
1) Firstly, uniformly stirring and mixing the P-40 seed crystal, the ultrashort fiber and the lead powder, spraying pure water accounting for 20-30% of the total mass of the pure water, controlling the spraying time to be 1-2 min, and stirring for 5-10 min;
2) Adding the rest pure water, controlling the water adding time to be 3-4 min, and continuously stirring for 5-10 min;
3) Then 1.38g/cm was added 3 The dilute sulfuric acid solution is added with acid for 8-12 min, and the temperature is kept for 5-10 min;
4) And finally, opening a cooling system, continuously stirring, and cooling to 45 ℃ to obtain the positive lead plaster.
The process of the negative electrode and the paste comprises the following steps:
weighing raw materials according to the weight parts of the cathode formula,
1) Firstly, uniformly stirring and mixing the composite carbon, SLI-A100 negative electrode auxiliary material package, ultrashort fibers and lead powder, spraying pure water accounting for 20-30% of the total mass of the pure water, controlling the spraying time to be 1-2 min, and stirring for 5-10 min;
2) Adding the rest pure water, controlling the water adding time to be 3-4 min, and continuously stirring for 5-10 min;
3) Then 1.38g/cm was added 3 The dilute sulfuric acid solution is added with acid for 8-12 min, and the temperature is kept for 5-10 min;
4) And finally, opening a cooling system, continuously stirring, and cooling to 45 ℃ to obtain the negative electrode lead plaster.
And transferring the lead plaster into a plaster coating bucket, uniformly coating the lead plaster on the surface of a lead net by a plaster coating machine, cutting the lead net to produce a single wet polar plate, rapidly drying the single wet polar plate by a drying kiln, transferring the single wet polar plate into a curing chamber, and curing the single wet polar plate into a dry green plate by a curing process.
The electrode group is encapsulated by adopting an EFS-C carbon-coated bag type PE separator to encapsulate the cathode;
the battery is assembled by adopting a COS cast-in-place welder, the end parts of the electrode group lugs which are encapsulated and assembled are immersed into a mould containing molten lead liquid, and the positive and negative electrode plate lugs are cast-welded and connected in parallel together rapidly. And then the welded electrode group is put into a battery tank, high current is applied to the connecting pieces of the positive electrode group and the negative electrode group through a clamp of a wall penetrating welding machine, the connecting pieces are locally melted, the pressure is kept for 3-5s, the adjacent connecting pieces are welded together, then the adjacent connecting pieces are distributed and put into each single cell of the battery tank body, the electrode group is subjected to butt welding by adopting a butt welding process, and then the large cover is subjected to heat sealing.
And (3) battery formation: 1.190g/cm of acid is added at one time 3 Adding acid into dilute sulfuric acid solution, charging by conventional formation charging process, pouring acid after formation, adding 20% multifunctional electrolyte additive into dilute sulfuric acid, and adding 1.19g/cm acid 3 And 1.300g/cm 3 The multifunctional electrolyte additive comprises the following components in parts by weight: zinc sulfate heptahydrate: cobalt sulfate: potassium sulfate: pure water=1:1:1:5, secondary acid addition is carried out on each cell of the storage battery tank body, the liquid level height is adjusted, and meanwhile, the mixed acid density of the electrolyte is ensured to be 1.280+/-0.005 g/cm 3 Finally, carrying out heat sealing on the small cover, detecting air tightness, and finally carrying out heavy current detection and battery cleaning dryingAnd (5) drying.
Example 3
An auxiliary battery lead plaster formula and a manufacturing process suitable for a pure electric new energy automobile comprise the following components in parts by weight:
the negative electrode lead plaster comprises the following components in parts by weight:
positive electrode paste mixing process:
weighing the raw materials according to the weight parts of the positive electrode formula.
1) Firstly, uniformly stirring and mixing the P-40 seed crystal, the ultrashort fiber and the lead powder, spraying pure water accounting for 20-30% of the total mass of the pure water, controlling the spraying time to be 1-2 min, and stirring for 5-10 min;
2) Adding the rest pure water, controlling the water adding time to be 3-4 min, and continuously stirring for 5-10 min;
3) Then 1.38g/cm was added 3 The dilute sulfuric acid solution is added with acid for 8-12 min, and the temperature is kept for 5-10 min;
4) And finally, opening a cooling system, continuously stirring, and cooling to 45 ℃ to obtain the positive lead plaster.
The process of the negative electrode and the paste comprises the following steps:
weighing raw materials according to the weight parts of the cathode formula.
1) Firstly, uniformly stirring and mixing the composite carbon, SLI-A100 negative electrode auxiliary material package, ultrashort fibers and lead powder, spraying pure water accounting for 20-30% of the total mass of the pure water, controlling the spraying time to be 1-2 min, and stirring for 5-10 min;
2) Adding the rest pure water, controlling the water adding time to be 3-4 min, and continuously stirring for 5-10 min;
3) Then 1.38g/cm was added 3 The dilute sulfuric acid solution is added with acid for 8-12 min, and the temperature is kept for 5-10 min;
4) And finally, opening a cooling system, continuously stirring, and cooling to 45 ℃ to obtain the negative electrode lead plaster.
And transferring the lead plaster into a plaster coating bucket, uniformly coating the lead plaster on the surface of a lead net by a plaster coating machine, cutting the lead net to produce a single wet polar plate, rapidly drying the single wet polar plate by a drying kiln, transferring the single wet polar plate into a curing chamber, and curing the single wet polar plate into a dry green plate by a curing process.
The electrode group is encapsulated by adopting an EFS-C carbon-coated bag type PE separator to encapsulate the cathode;
the battery is assembled by adopting a COS cast-in-place welder, the end parts of the electrode group lugs which are encapsulated and assembled are immersed into a mould containing molten lead liquid, and the positive and negative electrode plate lugs are cast-welded and connected in parallel together rapidly. And then the welded electrode group is put into a battery tank, high current is applied to the connecting pieces of the positive electrode group and the negative electrode group through a clamp of a wall penetrating welding machine, the connecting pieces are locally melted, the pressure is kept for 3-5s, the adjacent connecting pieces are welded together, then the adjacent connecting pieces are distributed and put into each single cell of the battery tank body, the electrode group is subjected to butt welding by adopting a butt welding process, and then the large cover is subjected to heat sealing.
And (3) battery formation: 1.190g/cm of acid is added at one time 3 Adding acid into dilute sulfuric acid solution, charging by conventional formation charging process, pouring acid after formation, adding 20% multifunctional electrolyte additive into dilute sulfuric acid, and adding 1.19g/cm acid 3 And 1.300g/cm 3 The multifunctional electrolyte additive comprises the following components in parts by weight: zinc sulfate heptahydrate: cobalt sulfate: potassium sulfate: pure water=1:1:1:5, for battery cell bodyAdding acid for each single cell for the second time, adjusting the liquid level height, and simultaneously ensuring the mixed acid density of the electrolyte to be 1.280+/-0.005 g/cm 3 And finally, carrying out heat sealing on the small cover, detecting air tightness, and finally carrying out heavy current detection and battery cleaning and drying.
Example 4
An auxiliary battery lead plaster formula and a manufacturing process suitable for a pure electric new energy automobile comprise the following components in parts by weight:
the negative electrode lead plaster comprises the following components in parts by weight:
positive electrode paste mixing process:
weighing the raw materials according to the weight parts of the positive electrode formula.
1) Firstly, uniformly stirring and mixing the P-40 seed crystal, the ultrashort fiber and the lead powder, spraying pure water accounting for 20-30% of the total mass of the pure water, controlling the spraying time to be 1-2 min, and stirring for 5-10 min;
2) Adding the rest pure water, controlling the water adding time to be 3-4 min, and continuously stirring for 5-10 min;
3) Then 1.38g/cm was added 3 The dilute sulfuric acid solution is added with acid for 8-12 min, and the temperature is kept for 5-10 min;
4) And finally, opening a cooling system, continuously stirring, and cooling to 45 ℃ to obtain the positive lead plaster.
The process of the negative electrode and the paste comprises the following steps:
weighing raw materials according to the weight parts of the cathode formula.
1) Firstly, uniformly stirring and mixing the composite carbon, SLI-A100 negative electrode auxiliary material package, ultrashort fibers and lead powder, spraying pure water accounting for 20-30% of the total mass of the pure water, controlling the spraying time to be 1-2 min, and stirring for 5-10 min;
2) Adding the rest pure water, controlling the water adding time to be 3-4 min, and continuously stirring for 5-10 min;
3) Then 1.38g/cm was added 3 The dilute sulfuric acid solution is added with acid for 8-12 min, and the temperature is kept for 5-10 min;
4) And finally, opening a cooling system, continuously stirring, and cooling to 45 ℃ to obtain the positive lead plaster.
And transferring the lead plaster into a plaster coating bucket, uniformly coating the lead plaster on the surface of a lead net by a plaster coating machine, cutting the lead net to produce a single wet polar plate, rapidly drying the single wet polar plate by a drying kiln, transferring the single wet polar plate into a curing chamber, and curing the single wet polar plate into a dry green plate by a curing process.
The electrode group is encapsulated by adopting an EFS-C carbon-coated bag type PE separator to encapsulate the cathode;
the battery is assembled by adopting a COS cast-in-place welder, the end parts of the electrode group lugs which are encapsulated and assembled are immersed into a mould containing molten lead liquid, and the positive and negative electrode plate lugs are cast-welded and connected in parallel together rapidly. And then the welded electrode group is put into a battery tank, high current is applied to the connecting pieces of the positive electrode group and the negative electrode group through a clamp of a wall penetrating welding machine, the connecting pieces are locally melted, the pressure is kept for 3-5s, the adjacent connecting pieces are welded together, then the adjacent connecting pieces are distributed and put into each single cell of the battery tank body, the electrode group is subjected to butt welding by adopting a butt welding process, and then the large cover is subjected to heat sealing.
And (3) battery formation: 1.190g/cm of acid is added at one time 3 Adding acid into dilute sulfuric acid solution, charging by conventional formation charging process, pouring acid after formation, adding 40% of multifunctional electrolyte additive into dilute sulfuric acid, and adding 1.19g/cm of secondary acid 3 And 1.300g/cm 3 The multifunctional electrolyte additive comprises the following components in parts by weight: zinc sulfate heptahydrate: cobalt sulfate: potassium sulfate: pure water=1:1:1:5,adding acid to each cell of the accumulator tank body for the second time, adjusting the liquid level height, and simultaneously ensuring the mixed acid density of the electrolyte to be 1.280+/-0.005 g/cm 3 And finally, carrying out heat sealing on the small cover, detecting air tightness, and finally carrying out heavy current detection and battery cleaning and drying.
Example 5
An auxiliary battery lead plaster formula and a manufacturing process suitable for a pure electric new energy automobile comprise the following components in parts by weight:
the negative electrode lead plaster comprises the following components in parts by weight:
positive electrode paste mixing process:
weighing the raw materials according to the weight parts of the positive electrode formula.
1) Firstly, uniformly stirring and mixing the P-40 seed crystal, the ultrashort fiber and the lead powder, spraying pure water accounting for 20-30% of the total mass of the pure water, controlling the spraying time to be 1-2 min, and stirring for 5-10 min;
2) Adding the rest pure water, controlling the water adding time to be 3-4 min, and continuously stirring for 5-10 min;
3) Then 1.38g/cm was added 3 The dilute sulfuric acid solution is added with acid for 8-12 min, and the temperature is kept for 5-10 min;
4) And finally, opening a cooling system, continuously stirring, and cooling to 45 ℃ to obtain the positive lead plaster.
The process of the negative electrode and the paste comprises the following steps:
weighing raw materials according to the weight parts of the cathode formula.
1) Firstly, uniformly stirring and mixing the composite carbon, SLI-A100 negative electrode auxiliary material package, ultrashort fibers and lead powder, spraying pure water accounting for 20-30% of the total mass of the pure water, controlling the spraying time to be 1-2 min, and stirring for 5-10 min;
2) Adding the rest pure water, controlling the water adding time to be 3-4 min, and continuously stirring for 5-10 min;
3) Then 1.38g/cm was added 3 The dilute sulfuric acid solution is added with acid for 8-12 min, and the temperature is kept for 5-10 min;
4) And finally, opening a cooling system, continuously stirring, and cooling to 45 ℃ to obtain the negative electrode lead plaster.
And transferring the lead plaster into a plaster coating bucket, uniformly coating the lead plaster on the surface of a lead net by a plaster coating machine, cutting the lead net to produce a single wet polar plate, rapidly drying the single wet polar plate by a drying kiln, transferring the single wet polar plate into a curing chamber, and curing the single wet polar plate into a dry green plate by a curing process.
The anode group is encapsulated by adopting a conventional bag type PE separator;
the battery is assembled by adopting a COS cast-in-place welder, the end parts of the electrode group lugs which are encapsulated and assembled are immersed into a mould containing molten lead liquid, and the positive and negative electrode plate lugs are cast-welded and connected in parallel together rapidly. And then the welded electrode group is put into a battery tank, high current is applied to the connecting pieces of the positive electrode group and the negative electrode group through a clamp of a wall penetrating welding machine, the connecting pieces are locally melted, the pressure is kept for 3-5s, the adjacent connecting pieces are welded together, then the adjacent connecting pieces are distributed and put into each single cell of the battery tank body, the electrode group is subjected to butt welding by adopting a butt welding process, and then the large cover is subjected to heat sealing.
And (3) battery formation: 1.190g/cm of acid is added at one time 3 Adding acid into dilute sulfuric acid solution, charging by conventional formation charging process, pouring acid after formation, adding acid for the second time, and adding 20% of multifunctional electricity into dilute sulfuric acid for the second timeSolution additive, secondary acid adding 1.19g/cm 3 And 1.300g/cm 3 The multifunctional electrolyte additive comprises the following components in parts by weight: zinc sulfate heptahydrate: cobalt sulfate: potassium sulfate: pure water=1:1:1:5, secondary acid addition is carried out on each cell of the storage battery tank body, the liquid level height is adjusted, and meanwhile, the mixed acid density of the electrolyte is ensured to be 1.280+/-0.005 g/cm 3 And finally, carrying out heat sealing on the small cover, detecting air tightness, and finally carrying out heavy current detection and battery cleaning and drying.
The performance of the auxiliary batteries prepared in examples 1 to 5 and the conventional starting batteries of the same type were tested, and the test results are shown in table 1.
The low-voltage charge acceptance test method comprises the following steps:
a. the battery is fully charged (at 25 ℃ +/-1 ℃ C., after charging with 2In (A) current until the average voltage of the single battery reaches 2.4V, charging is continued for 5 hours) within 1-5 hours after the end, and the battery is kept at 25 ℃ +/-2 ℃ C. Ambient temperature and discharged with Io (A) current for 5 hours (I0=Ce/10).
b. Immediately after the discharge is completed, the battery is placed in a low temperature box or chamber having a temperature of 0 ℃ for at least 20 h.
c. The storage battery is charged at the voltage of 14.00V plus or minus 0.1V within 1min after being taken out of the low-temperature box, the charging current Ica (A) is recorded after 10min, and the ratio Ica/I0 is calculated and is more than or equal to 2.0.
The cycle life test method under the partial charge state comprises the following steps:
1. the cycle was as follows, discharged at (26.+ -. 1) ℃ for 2.5 hours at 4X In:
2. charging at 7 XIn and (14.4.+ -. 0.05) V for 40 minutes,
discharging at 7×in for 30 minutes;
disconnect criteria: the voltage of the storage battery is less than or equal to 10V.
3. Equalizing charge at (26+ -1) deg.C with 2×In and (16+ -0.05) V for 18 hr;
the above 1 st to 3 rd points constitute a test unit. After passing the specified cycle times, the storage battery is fully charged and then subjected to a 20hr capacity test, wherein the 20hr capacity is required to be greater than 50%Cn.
TABLE 1 Performance test results of the prepared auxiliary batteries
As can be seen from the data in table 1, the cycle life of the auxiliary battery prepared in example 2 at partial state of charge is higher than that of example 1, which indicates that the addition of the P-40 seed crystal in the positive electrode lead paste formulation can improve the cycle life of the auxiliary battery at partial state of charge; the low-voltage charge acceptance of the auxiliary battery prepared in the example 3 is higher than that of the example 1, which shows that the addition of the SLI-A100 negative auxiliary material package in the negative lead paste formula can improve the low-voltage charge acceptance of the storage battery; the auxiliary battery prepared in example 4 has higher low-voltage charge acceptance than that of example 1, which shows that the addition of the multifunctional electrolyte additive to the electrolyte can improve the low-voltage charge acceptance of the auxiliary battery; the auxiliary battery prepared in example 3 has higher low-voltage charge acceptance than that of example 5, indicating that the EFS-C carbon-coated PE separator has a certain promotion effect on improving the low-voltage charge acceptance of the battery.
The above describes in detail the formulation and manufacturing process of the auxiliary battery lead paste suitable for the pure electric new energy automobile, and specific examples are applied to illustrate the principle and implementation of the invention, and the above description of the examples is only used to help understand the method and core idea of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (5)
1. Auxiliary battery lead plaster suitable for pure electric new energy automobile, its characterized in that: the formula of the positive electrode lead plaster comprises the following components in parts by weight:
the negative electrode lead plaster comprises the following components in parts by weight:
2. the auxiliary battery lead plaster suitable for the pure electric new energy automobile as claimed in claim 1, wherein the auxiliary battery lead plaster is characterized in that: the P-40 seed crystal is 4 PbO.PbSO 4 With Sb 2 O 3 The composite crystal is formed after ball milling according to the weight ratio of (6+/-0.5) to (1+/-0.2), and the grain size of the composite crystal is 3-5 mu m.
3. The auxiliary battery lead plaster suitable for the pure electric new energy automobile as claimed in claim 1, wherein the auxiliary battery lead plaster is characterized in that: the SLI-A100 negative electrode auxiliary material comprises the following components in percentage by weight: norway HT-1/1 lignin: humic acid= (6±0.5): (1±0.2): (1.+ -. 0.2).
4. The manufacturing method of the auxiliary battery suitable for the pure electric new energy automobile is characterized by comprising the following steps of: the process comprises the following steps:
weighing the following raw materials in parts by weight of the positive electrode formula:
1) Firstly, uniformly stirring and mixing the P-40 seed crystal, the ultrashort fiber and the lead powder, spraying pure water accounting for 20-30% of the total mass of the pure water, controlling the spraying time to be 1-2 min, and stirring for 5-10 min;
2) Adding the rest pure water, controlling the water adding time to be 3-4 min, and continuously stirring for 5-10 min;
3) Then 1.38g/cm was added 3 The dilute sulfuric acid solution is added with acid for 8-12 min, and the temperature is kept for 5-10 min;
4) Finally, a cooling system is opened, stirring is continued, and the temperature is reduced to 45 ℃ to obtain the positive lead plaster;
the process of the negative electrode and the paste comprises the following steps:
weighing the following raw materials in parts by weight according to a negative electrode formula:
1) Firstly, uniformly stirring and mixing the composite carbon, SLI-A100 negative electrode auxiliary material package, ultrashort fibers and lead powder, spraying pure water accounting for 20-30% of the total mass of the pure water, controlling the spraying time to be 1-2 min, and stirring for 5-10 min;
2) Adding the rest pure water, controlling the water adding time to be 3-4 min, and continuously stirring for 5-10 min;
3) Then 1.38g/cm was added 3 The dilute sulfuric acid solution is added with acid for 8-12 min, and the temperature is kept for 5-10 min;
4) And finally, opening a cooling system, continuously stirring, and cooling to 45 ℃ to obtain the negative electrode lead plaster.
Transferring the lead plaster into a plaster coating bucket, uniformly coating and filling the lead plaster on the surface of a lead mesh by a plaster coating machine, then cutting the lead mesh to produce a single wet polar plate, rapidly drying the single wet polar plate by a drying kiln, transferring the single wet polar plate into a curing chamber, and curing the single wet polar plate into a dry green plate by a curing process;
the anode group is encapsulated by adopting an EFS-C carbon-coated PE separator;
the method comprises the steps of (1) adopting a COS cast-welding machine to assemble a storage battery, immersing the end parts of electrode group lugs which are encapsulated and assembled into a mould containing molten lead liquid, quickly cast-welding positive and negative electrode plate lugs respectively in parallel connection, then loading the welded electrode groups into a battery groove, applying high current to connecting pieces of the positive and negative electrode groups through a wall penetrating welding machine clamp, locally melting the connecting pieces, maintaining the pressure for 3-5s, welding adjacent connecting pieces together, then distributing and loading the connecting pieces into each cell of a storage battery groove body, carrying out electrode group butt welding by adopting a butt welding process, and then carrying out large-cover heat sealing;
and (3) battery formation: adding acid by adopting dilute sulfuric acid solution for primary acid addition, adopting a formation charging process for charging formation, pouring acid after formation is finished, adding acid for secondary acid addition, and adding 20% -40% of multifunctional electrolysis into dilute sulfuric acid for secondary acid additionThe liquid additive comprises the following components in parts by weight: zinc sulfate heptahydrate: cobalt sulfate: potassium sulfate: pure water= (1±0.1): (1±0.1): (1±0.1): (5+/-0.5), adding acid to each cell of the storage battery cell body for the second time, adjusting the liquid level height, and simultaneously ensuring the mixed acid density of the electrolyte to be 1.280+/-0.005 g/cm 3 And finally, carrying out heat sealing on the small cover, detecting air tightness, and finally carrying out heavy current detection and battery cleaning and drying.
5. The method for manufacturing an auxiliary battery suitable for a new energy automobile with pure electric power according to claim 4, wherein the method comprises the following steps: the EFS-C carbon-coated PE separator is an EFS-C carbon-coated bag type PE separator, and the surface of the EFS-C carbon-coated PE separator is coated with a layer of carbon material.
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