CN111564627A - Lead paste formula for negative plate of lead storage battery, preparation method for negative plate and negative plate - Google Patents
Lead paste formula for negative plate of lead storage battery, preparation method for negative plate and negative plate Download PDFInfo
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- 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
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- 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
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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
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/14—Electrodes for lead-acid accumulators
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- H01M4/20—Processes of manufacture of pasted electrodes
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- H—ELECTRICITY
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
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Abstract
The invention discloses a lead paste formula of a negative plate of a lead storage battery, a preparation method of the lead paste formula of the negative plate of the lead storage battery and the negative plate, wherein the lead paste formula of the negative plate of the lead storage battery comprises lead powder and an additive, the additive comprises barium sulfate, lignin, humic acid, acetylene black, fiber and 4-hydroxy-3-methoxybenzaldehyde, wherein the addition amount of the barium sulfate is 0.8-1.0 wt% of the lead powder, the addition amount of the lignin is 0.1-0.3 wt% of the lead powder, the addition amount of the humic acid is 0.1-0.3 wt% of the lead powder, the addition amount of the acetylene black is 0.2-0.4 wt% of the lead powder, the addition amount of the fiber is 0.07-0.1 wt% of the lead powder, and the addition amount of the 4-hydroxy-3-methoxybenzaldehyde is 0.08-0.15 wt% of the lead powder. The negative plate diachylon can reduce water loss of the battery in the charge-discharge cycle process, reduce the tail-stage current of the battery in the last charging stage and prevent the battery from swelling and thermal failure.
Description
Technical Field
The invention belongs to the technical field of lead storage battery production, and particularly relates to a lead paste formula of a negative plate of a lead storage battery, a preparation method of the lead paste of the negative plate and the negative plate.
Background
Early lead-acid batteries used lead-antimony alloy as the battery grid, and their cycle life, especially deep cycle life, had relative stability, but their disadvantages were also obvious, such as the battery needs regular water replenishment, acid liquor and fog escape during charging, causing harmonic corrosion. In the nineties, a valve-regulated lead-acid battery which adopts an AGM material and a barren solution design, can quickly react oxygen generated by a positive electrode and a negative active substance to reduce the oxygen into water in the charging process, does not need water supplement maintenance in use, starts mass production and is put into the market. The high-performance and pollution-free high-voltage switch has the excellent performances of high performance, no pollution, no maintenance, safety and reliability.
Chinese patent document with publication number CN109546097A discloses a lead-acid battery negative electrode lead plaster with high recharging rate, wherein the formula of the lead plaster is 100 parts of lead powder; 0.06-0.12 part of short fibers; 0.5-1.5 parts of superfine barium sulfate; 0.1-0.25 parts of carbon black; 0.05-0.12 part of isodulcin; 8-12 parts of sulfuric acid; 9-13 parts of deionized water.
Chinese patent publication No. CN107482190A discloses a negative plate lead paste for a lead storage battery, which comprises the following components in parts by weight: 1000 parts of lead powder, 1.5-5 parts of carbon black, 4-7 parts of barium sulfate, 3-8 parts of humic acid, 10-40 parts of graphite, 1-4 parts of lignin, 0.1-1.5 parts of fiber, 0.01-0.05 part of surfactant, 0.2-1.0 part of aluminum hydroxide sol, 60-100 parts of dilute sulfuric acid, 100 parts of pure water and 150 parts of processing and recycling powder and 6-15 parts of processing and recycling powder.
Although the valve-controlled lead-acid battery has made great progress, the cycle performance of the battery is not ideal compared with the battery made of a liquid-rich lead-antimony alloy grid. Particularly, on a power battery, in order to improve the defect of deep cycle life stability, antimony powder, antimony trioxide, antimony pentoxide and other antimony oxides are added into a positive electrode lead paste formula, and the addition of the substances improves the deep cycle performance of a battery positive electrode to a certain extent. However, Sb ions are partially transferred to the electrolyte and the negative electrode active material as charging and discharging progresses. Sb ions serve as harmful substances on the negative electrode, the hydrogen evolution potential of the negative electrode is reduced, the negative electrode reaction is hydrogen evolution water loss, and the charging tail period current is increased (the Sb ions are strictly forbidden to be added when the communication floating or the battery with longer service life is used).
Under the condition of no water supplement, when the overpotential of hydrogen precipitation exceeds 300mV, the negative electrode charging cannot be normally carried out, and the current is used on the decomposition of water in the later charging period, so that the water loss and thermal runaway of the battery are seriously caused, and the battery is bulged.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a lead paste formula of a negative plate of a lead storage battery, which can reduce water loss of the battery in the charge-discharge cycle process, reduce the tail-stage current of the battery in the last charging stage and prevent the battery from swelling and losing efficacy.
The lead paste formula of the negative plate of the lead storage battery comprises lead powder and an additive, wherein the additive comprises barium sulfate, lignin, humic acid, acetylene black, fiber and 4-hydroxy-3-methoxybenzaldehyde, the addition amount of the barium sulfate is 0.8-1.0% of the weight of the lead powder, the addition amount of the lignin is 0.1-0.3% of the weight of the lead powder, the addition amount of the humic acid is 0.1-0.3% of the weight of the lead powder, the addition amount of the acetylene black is 0.2-0.4% of the weight of the lead powder, the addition amount of the fiber is 0.07-0.1% of the weight of the lead powder, and the addition amount of the 4-hydroxy-3-methoxybenzaldehyde is 0.08-0.15% of the weight of the lead powder.
According to the formula of the lead paste for the negative plate of the lead storage battery, 4-hydroxy-3-methoxybenzaldehyde is used as a hydrogen evolution inhibitor, and the hydrogen evolution inhibitor is added into the lead paste for the negative plate and adsorbed on the surface of harmful impurities of a negative electrode after acid charging, so that the separation of hydrogen gas of the negative electrode on the harmful impurities can be inhibited, the water loss of the battery in the charging and discharging cycle process is reduced, the tail-stage current at the final stage of battery charging is reduced, and the battery is prevented from swelling and losing heat.
Preferably, the addition amount of the barium sulfate is 0.9-1.0% of the weight of the lead powder.
Preferably, the addition amount of the lignin is 0.2-0.3% of the weight of the lead powder.
Preferably, the addition amount of the humic acid is 0.1-0.2% of the weight of the lead powder.
Preferably, the addition amount of the acetylene black is 0.3-0.4% of the weight of the lead powder.
Preferably, the addition amount of the fiber is 0.08-0.1% of the weight of the lead powder.
The addition amount of the 4-hydroxy-3-methoxybenzaldehyde is 0.1-0.15% of the weight of the lead powder.
The lead paste formula of the negative plate of the lead storage battery also comprises the following components: the lead powder is prepared from dilute sulfuric acid with the density of 1.40g/ml and pure water, wherein the addition amount of the dilute sulfuric acid is 7.6-8.6% of the weight of the lead powder, and the addition amount of the pure water is 11.3% of the weight of the lead powder.
A preparation method of lead paste of a negative plate of a lead storage battery comprises the following steps:
providing lead powder, barium sulfate, lignin, humic acid, acetylene black, fiber and 4-hydroxy-3-methoxybenzaldehyde according to the weight ratio in the formula of the lead paste for the negative plate of the lead storage battery, uniformly mixing the raw materials, adding pure water and dilute sulfuric acid, and further stirring and mixing to obtain the lead paste for the negative plate of the lead storage battery.
The invention also provides a negative plate of the lead storage battery, which is prepared by coating the lead paste of the negative plate of the lead storage battery on a negative plate grid.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the lead plaster formula of the negative plate of the lead storage battery, 4-hydroxy-3-methoxybenzaldehyde is used as a hydrogen evolution inhibitor and is adsorbed on mass points (antimony, silver, copper and the like) with hydrogen evolution overpotential, so that the hydrogen precipitation on the mass points is inhibited, and the water loss of the rechargeable battery is reduced.
2. By adding the 4-hydroxy-3-methoxybenzaldehyde into the lead paste of the negative plate, the current at the end of charging of the battery is improved, the thermal runaway of charging of the battery is prevented, and the battery is prevented from returning due to the thermal runaway and bulging of the battery after water loss during charging.
Detailed Description
The present invention is described in further detail below with reference to examples, which are intended to facilitate the understanding of the present invention without limiting it in any way.
The 4-hydroxy-3-methoxybenzaldehyde used in the embodiment of the invention is white or yellowish needle-like crystal or crystalline powder in appearance, the melting point is 81-83 ℃, the drying weight loss is less than or equal to 0.5%, the content is more than or equal to 99.5%, the heavy metal content (calculated by Pb) is less than or equal to 10mg/Kg, and the arsenic content: less than or equal to 3 mg/Kg.
Example 1
80kg of sulfuric acid with the specific gravity of 1.40g/ml, 113kg of pure water, 9kg of barium sulfate, 2kg of lignin, 2kg of humic acid, 3kg of acetylene black and 0.85kg of fiber, and 1.15kg of 4-hydroxy-3-methoxybenzaldehyde are added into 1000kg of lead powder, and a plurality of pure water is prepared for later use, and the lead plaster is controlled to be 4.45 +/-0.10 g/ml according to the specific gravity.
Example 2
76kg of sulfuric acid with the specific gravity of 1.40g/ml, 113kg of pure water, 8kg of barium sulfate, 1kg of lignin, 3kg of humic acid, 2kg of acetylene black, 0.7kg of fiber and 0.8kg of 4-hydroxy-3-methoxybenzaldehyde are added into every 1000kg of lead powder, a plurality of pure water is prepared for later use, and the lead plaster is controlled to be 4.45 +/-0.10 g/ml according to the specific gravity.
Example 3
86kg of sulfuric acid with the specific gravity of 1.40g/ml, 113kg of pure water, 10kg of barium sulfate, 3kg of lignin, 1kg of humic acid, 4kg of acetylene black and 1.0kg of fiber, and 1.5kg of 4-hydroxy-3-methoxybenzaldehyde are added into every 1000kg of lead powder, and a plurality of pure water is prepared for later use, and the lead plaster is controlled to be 4.45 +/-0.10 g/ml according to the specific gravity.
Example 4
80kg of sulfuric acid with the specific gravity of 1.40g/ml, 113kg of pure water, 9kg of barium sulfate, 2kg of lignin, 2kg of humic acid, 3kg of acetylene black, 0.85kg of fiber and 1kg of 4-hydroxy-3-methoxybenzaldehyde are added into 1000kg of lead powder, a plurality of pure water is prepared for later use, and the specific gravity of the lead plaster is controlled to be 4.45 +/-0.10 g/ml.
Example 5
76kg of sulfuric acid with the specific gravity of 1.40g/ml, 113kg of pure water, 8kg of barium sulfate, 1kg of lignin, 3kg of humic acid, 2kg of acetylene black, 0.7kg of fiber and 1kg of 4-hydroxy-3-methoxybenzaldehyde are added into every 1000kg of lead powder, a plurality of pieces of pure water are prepared, and the specific gravity of the lead plaster is controlled to be 4.45 +/-0.10 g/ml.
Example 6
86kg of sulfuric acid with the specific gravity of 1.40g/ml, 113kg of pure water, 10kg of barium sulfate, 3kg of lignin, 1kg of humic acid, 4kg of acetylene black, 1.0kg of fiber and 1kg of 4-hydroxy-3-methoxybenzaldehyde are added into every 1000kg of lead powder, a plurality of pure water is prepared for later use, and the specific gravity of the lead plaster is controlled to be 4.45 +/-0.10 g/ml.
Comparative example 1
80kg of sulfuric acid with the specific gravity of 1.40g/ml, 113kg of pure water, 9kg of barium sulfate, 2kg of lignin, 2kg of humic acid, 3kg of acetylene black and 0.85kg of fiber are added into 1000kg of lead powder, a plurality of pure water is prepared for later use, and the lead plaster is controlled to be 4.45 +/-0.10 g/ml according to the specific gravity.
Comparative example 2
76kg of sulfuric acid with the specific gravity of 1.40g/ml, 113kg of pure water, 8kg of barium sulfate, 1kg of lignin, 3kg of humic acid, 2kg of acetylene black and 0.7kg of fiber are added into every 1000kg of lead powder, a plurality of pure water is prepared for later use, and the lead plaster is controlled to be 4.45 +/-0.10 g/ml according to the specific gravity.
Comparative example 3
86kg of sulfuric acid with the specific gravity of 1.40g/ml, 113kg of pure water, 10kg of barium sulfate, 3kg of lignin, 1kg of humic acid, 4kg of acetylene black and 1.0kg of fiber are added into every 1000kg of lead powder, a plurality of pure water is prepared for later use, and the lead plaster is controlled to be 4.45 +/-0.10 g/ml according to the specific gravity.
The negative electrode lead pastes in the examples 1 to 6 and the comparative examples 1 to 3 are prepared into negative electrode plates with the same specification, and then positive electrode plates are prepared, wherein the positive electrode plate lead paste comprises antimony trioxide (0.1%), stannous sulfate (0.1%), graphite (0.2%), short fibers (0.01%), 1.40g/ml sulfuric acid (4.5%), 10.2% pure water and a certain amount of adjusting water, and the apparent specific gravity of the lead paste is controlled to be 4.40 +/-0.10 g/ml.
The negative electrode plates made of the negative electrode plate lead pastes of examples 1 to 6 and comparative examples 1 to 3 were assembled with the positive electrode plates to form batteries (6-DZF-12, 6 cells per battery) of the same specification, and the tests were performed.
Example 1, the weight of the battery is 4.252Kg, the battery discharges to 1.6h at the ambient temperature of 30 + -2 ℃ in 6A, then the battery is charged for 8h by rotating to constant voltage of 14.8V and current limiting 3A, and the battery is kept still for 0.5h, which is a small cycle; the current of the rechargeable battery was measured at 8h of charging when the small cycle was performed 25 times, and then the weight of the measured battery was removed, which was a test period after the end of the above test. The current (mA) and the water loss mass (g) of the battery in the end period of charging in 1-12 test periods are recorded as shown in Table 1.
TABLE 1
| Test cycle | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Accumulation |
| Tail phase current | 85 | 75 | 76 | 78 | 81 | 89 | 79 | 86 | 89 | 93 | 96 | 98 | / |
| Quality of water loss | 5.3 | 4.1 | 3.4 | 3.2 | 3.2 | 3.3 | 3.3 | 3.3 | 3.4 | 3.4 | 3.4 | 3.5 | 42.8g |
Example 2, the weight of the battery is 4.245Kg, the battery discharges to 1.6h at the ambient temperature of 30 plus or minus 2 ℃, then the battery is charged for 8h by rotating constant voltage 14.8V current-limiting 3A, and the battery stands for 0.5h, which is a small cycle; the current of the rechargeable battery was measured at 8h of charging when the small cycle was performed 25 times, and then the weight of the measured battery was removed, which was a test period after the end of the above test. The current (mA) and the water loss mass (g) of the battery in the end period of charging in 1-12 test periods are recorded as shown in Table 2.
TABLE 2
| Test cycle | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Accumulation |
| Tail phase current | 88 | 79 | 76 | 80 | 83 | 89 | 86 | 89 | 91 | 95 | 98 | 98 | / |
| Quality of water loss | 5.3 | 4.2 | 3.4 | 3.2 | 3.3 | 3.4 | 3.4 | 3.4 | 3.5 | 3.5 | 3.5 | 3.5 | 43.6g |
Example 3, the weight of the battery is 4.232Kg, the battery discharges to 1.6h at the ambient temperature of 30 plus or minus 2 ℃, then the battery is charged for 8h by rotating constant voltage 14.8V current-limiting 3A, and the battery stands for 0.5h, which is a small cycle; the current of the rechargeable battery was measured at 8h of charging when the small cycle was performed 25 times, and then the weight of the measured battery was removed, which was a test period after the end of the above test. The current (mA) and the water loss mass (g) of the battery at the end of the charging period in 1-12 test periods are recorded as shown in Table 3.
TABLE 3
| Test cycle | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Accumulation |
| Tail phase current | 87 | 75 | 73 | 74 | 75 | 78 | 79 | 84 | 86 | 91 | 95 | 95 | / |
| Quality of water loss | 5.2 | 4.2 | 3.2 | 3.1 | 3.2 | 3.2 | 3.3 | 3.3 | 3.4 | 3.5 | 3.5 | 3.5 | 42.6g |
Example 4, the weight of the battery is 4.240Kg, the battery discharges to 1.6h at the ambient temperature of 30 + -2 ℃ in 6A, then the battery is charged for 8h by rotating to constant voltage of 14.8V and current limiting of 3A, and the battery is kept still for 0.5h, which is a small cycle; the current of the rechargeable battery was measured at 8h of charging when the small cycle was performed 25 times, and then the weight of the measured battery was removed, which was a test period after the end of the above test. The current (mA) and the water loss mass (g) of the battery at the end of the charging period in 1-12 test periods are recorded as shown in Table 4.
TABLE 4
| Test cycle | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Accumulation |
| Tail phase current | 86 | 76 | 73 | 75 | 76 | 78 | 80 | 85 | 86 | 90 | 94 | 96 | / |
| Quality of water loss | 5.1 | 4.2 | 3.3 | 3.2 | 3.3 | 3.2 | 3.3 | 3.3 | 3.4 | 3.5 | 3.5 | 3.6 | 42.9g |
Example 5, the battery weight measured 4.239Kg, at the ambient temperature of 30 ± 2 ℃, the battery discharged to 1.6h at 6A, then the constant voltage 14.8V current limited 3A charged 8h, the rest 0.5h for a small cycle; the current of the rechargeable battery was measured at 8h of charging when the small cycle was performed 25 times, and then the weight of the measured battery was removed, which was a test period after the end of the above test. The current (mA) and the water loss mass (g) of the battery at the end of the charging period in 1-12 test periods are recorded as shown in Table 5.
TABLE 5
| Test cycle | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Accumulation |
| Tail phase current | 85 | 76 | 76 | 77 | 80 | 85 | 81 | 86 | 91 | 94 | 96 | 97 | / |
| Quality of water loss | 5.2 | 4.1 | 3.3 | 3.2 | 3.2 | 3.2 | 3.3 | 3.3 | 3.4 | 3.5 | 3.5 | 3.6 | 42.8g |
Example 6, the weight of the battery was measured to be 4.245Kg, the battery was discharged at ambient temperature 30 + -2 deg.C to 1.6h at 6A, then charged at constant voltage 14.8V current limited 3A for 8h, and left to stand for 0.5h for a small cycle; the current of the rechargeable battery was measured at 8h of charging when the small cycle was performed 25 times, and then the weight of the measured battery was removed, which was a test period after the end of the above test. The current (mA) and the water loss mass (g) of the battery at the end of the charging period in 1-12 test periods are recorded as shown in Table 6.
TABLE 6
| Test cycle | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Accumulation |
| Tail phase current | 87 | 76 | 75 | 76 | 80 | 84 | 83 | 87 | 91 | 93 | 95 | 97 | / |
| Quality of water loss | 5.3 | 4.1 | 3.2 | 3.1 | 3.2 | 3.3 | 3.3 | 3.3 | 3.4 | 3.5 | 3.6 | 3.6 | 42.9g |
Comparative example 1, the weight of the battery was 4.251Kg, at ambient temperature 30 + -2 deg.C, the battery was discharged at 6A for 1.6h, then charged at constant voltage of 14.8V with current limited 3A for 8h, and left to stand for 0.5h for a small cycle; the current of the rechargeable battery was measured at 8h of charging when the small cycle was performed 25 times, and then the weight of the measured battery was removed, which was a test period after the end of the above test. The current (mA) and the water loss mass (g) of the battery at the end of the charging period in 1-12 test periods are recorded as shown in Table 7.
TABLE 7
| Test cycle | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Accumulation |
| Tail phase current | 135 | 89 | 98 | 102 | 105 | 110 | 117 | 120 | 127 | 132 | 156 | 182 | / |
| Quality of water loss | 5.8 | 4.5 | 3.1 | 3.5 | 3.7 | 3.9 | 4.0 | 4.4 | 4.8 | 5.3 | 5.4 | 5.6 | 54.0g |
Comparative example 2, the battery measured weight of 4.239Kg, at the ambient temperature of 30 + -2 deg.C, the battery discharged to 1.6h at 6A, then transferred to constant voltage of 14.8V, current limited to 3A for charging 8h, left stand for 0.5h for a small cycle; the current of the rechargeable battery was measured at 8h of charging when the small cycle was performed 25 times, and then the weight of the measured battery was removed, which was a test period after the end of the above test. The current (mA) and the water loss mass (g) of the battery at the end of the charging period in 1-12 test periods are recorded as shown in Table 8.
TABLE 8
| Test cycle | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Accumulation |
| Tail phase current | 132 | 88 | 93 | 102 | 106 | 108 | 116 | 121 | 126 | 135 | 154 | 180 | / |
| Quality of water loss | 5.7 | 4.4 | 3.2 | 3.6 | 3.7 | 3.8 | 4.0 | 4.3 | 4.5 | 5.2 | 5.3 | 5.5 | 53.2g |
Comparative example 3, the battery weight measured 4.234Kg, at the ambient temperature of 30 + -2 deg.C, the battery discharged to 1.6h at 6A, then transferred to constant voltage 14.8V current-limited 3A to charge for 8h, left standstill for 0.5h as a small cycle; the current of the rechargeable battery was measured at 8h of charging when the small cycle was performed 25 times, and then the weight of the measured battery was removed, which was a test period after the end of the above test. The current (mA) and the water loss mass (g) of the battery at the end of the charging period in 1-12 test periods are recorded as shown in Table 9.
TABLE 9
| Test cycle | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Accumulation |
| Tail phase current | 130 | 90 | 93 | 100 | 103 | 109 | 118 | 123 | 129 | 135 | 157 | 189 | / |
| Quality of water loss | 5.6 | 4.4 | 3.4 | 3.6 | 3.8 | 3.9 | 4.1 | 4.4 | 4.7 | 5.3 | 5.5 | 5.7 | 54.4g |
For the data analysis of the test batteries, the current of the batteries in the embodiment 1-6 rises stably and fluctuates little at the end of each test cycle in the charging tail period; in comparative examples 1 to 3, the charging current of the battery showed a significant increase at the end of the 4 th to 8 th major cycles. In the examples 1-3, the water loss per unit period of the battery is relatively uniform, and the total water loss in the period is lower than that in the comparative examples 1-3.
The above results illustrate that:
compared with the charge current and water loss tests in the end period of the cycle life of the comparative example 1, the comparative example 2 and the comparative example 3, the current of the battery with the negative electrode lead paste added with the 4-hydroxy-3-methoxybenzaldehyde in the end period of charge is reduced by 30-40%, and the water loss in 12 periods is reduced by 20%. The battery for power is added with 4-hydroxy-3-methoxybenzaldehyde added into the lead paste of the negative electrode, is matched with the battery for power with antimony powder and antimony oxide added into the positive electrode, reduces water loss, obviously reduces the current at the end of charging, and can improve thermal runaway of the battery when the battery is used at high temperature.
The embodiments described above are intended to illustrate the technical solutions and advantages of the present invention, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, additions and equivalents made within the scope of the principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. The lead paste formula for the negative plate of the lead storage battery comprises lead powder and an additive, and is characterized in that the additive comprises barium sulfate, lignin, humic acid, acetylene black, fiber and 4-hydroxy-3-methoxybenzaldehyde, wherein the addition amount of the barium sulfate is 0.8-1.0% of the weight of the lead powder, the addition amount of the lignin is 0.1-0.3% of the weight of the lead powder, the addition amount of the humic acid is 0.1-0.3% of the weight of the lead powder, the addition amount of the acetylene black is 0.2-0.4% of the weight of the lead powder, the addition amount of the fiber is 0.07-0.1% of the weight of the lead powder, and the addition amount of the 4-hydroxy-3-methoxybenzaldehyde is 0.08-0.15% of the weight of the lead powder.
2. The negative plate diachylon formulation of claim 1, wherein the barium sulfate is added in an amount of 0.9-1.0% by weight of the lead powder.
3. The lead storage battery negative plate diachylon formula of claim 1, wherein the lignin is added in an amount of 0.2-0.3% by weight of the lead powder.
4. The lead storage battery negative plate diachylon formula of claim 1, wherein the addition amount of the humic acid is 0.1-0.2% of the weight of the lead powder.
5. The lead storage battery negative plate diachylon formula of claim 1, wherein the acetylene black is added in an amount of 0.3-0.4% by weight of the lead powder.
6. The negative plate diachylon formulation of claim 1, wherein the fiber is added in an amount of 0.08-0.1% by weight of the lead powder.
7. The lead storage battery negative plate diachylon formula of claim 1, wherein the 4-hydroxy-3-methoxybenzaldehyde is added in an amount of 0.1-0.15% by weight of the lead powder.
8. The negative plate diachylon formulation of claim 1, further comprising the following ingredients: the lead powder is prepared from dilute sulfuric acid with the density of 1.40g/ml and pure water, wherein the addition amount of the dilute sulfuric acid is 7.6-8.6% of the weight of the lead powder, and the addition amount of the pure water is 11.3% of the weight of the lead powder.
9. The preparation method of the lead paste of the negative plate of the lead storage battery is characterized by comprising the following steps of:
the lead powder, barium sulfate, lignin, humic acid, acetylene black, fiber and 4-hydroxy-3-methoxybenzaldehyde are provided according to the weight ratio in the formula of the lead storage battery negative plate lead plaster of any one of claims 1 to 8, and the lead powder, the barium sulfate, the lignin, the humic acid, the acetylene black, the fiber and the 4-hydroxy-3-methoxybenzaldehyde are uniformly mixed, then pure water and dilute sulfuric acid are added for further stirring and mixing, so that the lead storage battery negative plate lead plaster is obtained.
10. A negative plate for a lead-acid storage battery, which is characterized by being prepared by coating the negative plate for a lead-acid storage battery as claimed in claim 9 with lead paste on a negative plate grid.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114069060A (en) * | 2021-10-28 | 2022-02-18 | 天能电池集团股份有限公司 | Negative lead paste of valve-regulated lead storage battery, preparation method of negative lead paste and valve-regulated lead storage battery |
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Application publication date: 20200821 |