CN100341177C - Negative lead cream of valve-controlled sealed plumbous acid accumulator for starting vehicle and production thereof - Google Patents

Abstract

The present invention relates to cathode aluminum plaster of a sealed lead acid accumulator controlled by a valve used for starting an automobile and a preparing method, which belongs to the technical field of accumulators. The present invention is used for solving the problems of poor cold-starting performance of the accumulator and short service life of the accumulator. The present invention has the improvement that solid raw materials of lead plaster are composed of the materials of 100kg of lead powder, 0.05 to 0.06kg of fiber, 0.2 to 0.4kg of acetylene black, 0.5 to 0.8kg of ultrafine barium sulfate, 0.5 to 0.8kg of humic acid, and 0.1 to 0.2kg of sodium lignosulfonate by weight unit. The lead plaster of the present invention integrates the characteristics of strong cold starting ability of wood sodium and strong charge acceptance of the humic acid, the optimum proportioning of the wood sodium and the humic acid is determined, a novel negative electrode mixing organic swelling agent is formed, the comprehensive ability of the charging acceptance and the cold-starting is ensured, and simultaneously, the problem of the cold-starting performance deterioration of a wood sodium formulation is solved. The test data indicates that the accumulator made of the anode lead plaster of the present invention is adopted, and indexes of performance of a major technique can achieve and exceed the standard requirements.

Description

Automobile start is with negative lead cream of valve-controlled sealed plumbous acid accumulator and preparation method

Technical field

The present invention relates to a kind of accumulator material and preparation method, particularly the automobile start negative lead cream of valve-controlled sealed plumbous acid accumulator belongs to the battery technology field.

Background technology

Along with the develop rapidly of auto industry, more and more higher to the performance requirement of lead-acid accumulator. Valve-regulated sealed battery is as the high-end product of lead-acid accumulator, and along with nearly 20 years going deep into of using and study, the characteristics such as its actual serviceability, stability, life-span have had significant progress, and application is more extensive. The automobile of at present abroad doing back-up power source with valve control battery is produced in batches, uses the 42V system automobile of valve control sealed battery (starting, illumination, igniting, energy storage, auxiliary power with) also to emerge such as Japanese Toyota, Honda. Valve-control sealed lead-acid battery with the common ground of general pregnant solution type lead acid accumulator is: the basic functional principle of bis sulfonate theory is identical. Difference is: 1. valve control battery will be worked under lower charging voltage; 2. for reducing the gassing dehydration, based on the oxygen cycle principle, valve control sealed battery adopts barren liquor type design (electrolyte is adsorbed in AGM dividing plate or the colloid); 3. because electrolyte content is few, battery must use higher density of electrolyte (〉=1.300g/cm³)。

When at present general lead-acid accumulator was produced, cathode lead plaster formula was: lead powder, barium sulfate, carbon black, sodium lignosulfonate, fiber, dilute sulfuric acid and water. Wherein sodium lignosulfonate (hereinafter to be referred as wooden sodium) is a kind of organic expander, plays to prevent that negative electrode active material from shrinking and the effect of passivation, can improve the battery cold starting performance. Usually should select suitable negative pole organic expander according to the purposes difference of battery. Table 1 has been listed three kinds of typical swelling agent prescriptions of different batteries cathode lead plaster: circulation power will have more barium sulfate and a small amount of wooden sodium with requiring battery long-life and middle low range discharge capability; The floating charging battery that requires for subsequent use has very low damage by water consumption, corrosion resistant grid and consistent float charge voltage, needs hardly wooden sodium; Automobile start will use the wooden sodium of high-load and an amount of barium sulfate with emphasizing more that then the discharging at low temperature and high multiplying power ability of battery, good charging accept performance and water retaining capacity.

Typical swelling agent prescription during table 1 different batteries is used:

	Automobile start is used (pregnant solution type)	Electrical source of power is used	Standby type
				Barium sulfate (%)	40～60	70～90	90～95
Sodium lignosulfonate (%)	25～40	3～10	0
				Carbon (%)	10～20	5～15	5～10

Because the institutional framework of wooden sodium has strong effect for the hydrogen overpotential, can reduce the charging of battery and accept performance, is applied to the problem that undercharge can appear in valve-regulated lead-acid battery. As automobile start with valve control control sealed lead acid battery, the Liquified gas tanker that himself is arranged, the design of battery, the selection of prescription are different from any scheme of above-mentioned existing battery, and cathode lead plaster and preparation thereof are the important component parts that automobile start is used valve-control sealed lead acid battery, and the research that must be correlated with, test can be determined.

Summary of the invention

Technical problem to be solved by this invention provides a kind of automobile start valve-control sealed lead acid battery negative pole aluminium cream and preparation method, thereby still has good charging to accept performance, cryogenic property and cycle life so that battery is worked under lower charging voltage.

The alleged problem of the present invention is solved by following technical scheme:

A kind of automobile start valve-control sealed lead acid battery negative pole aluminium cream, its special feature is: the solid material of described aluminium cream is comprised of following substances: lead powder 100 weight portions, fiber 0.05～0.06 weight portion, acetylene black 0.2～0.4 weight portion, ultra-fine barium sulfate 0.5～0.8 weight portion, humic acid 0.5～0.8 weight portion, sodium lignosulfonate 0.1～0.2 weight portion, the particle diameter of ultra-fine barium sulfate is less than 30 microns.

Above-mentioned automobile start negative lead cream of valve-controlled sealed plumbous acid accumulator, PbO content is 75-85% in the described aluminium powder.

The above-mentioned automobile start preparation method of negative lead cream of valve-controlled sealed plumbous acid accumulator, it is undertaken by following operation:

A. prepare burden: take by weighing each raw material by above-mentioned lead plaster solid material proportioning;

B. be dry mixed: above-mentioned lead plaster solid material is put into paste mixing machine be dry mixed;

C. wet mixing: the pure water that adds raw material weight 10～12% stirs;

D. drench acid: the limit is stirred take shape spray and is added raw material weight 8～10%, liquid-tight degree as 1.40g/cm³Sulfuric acid solution, and the cream temperature goes out the cream temperature and is lower than 45 ℃ less than 65 ℃.

Lead plaster of the present invention is to move under lower charging voltage with valve-control sealed lead acid battery for automobile start, still requires have good charging to accept performance, cold starting performance and long-life and designs. It combines wooden sodium cold-starting ability by force and the strong characteristics of humic acid charge acceptance, and determined the two best proportioning by test, form a kind of novel negative pole and be mixed with the machine swelling agent, guaranteed that charging is accepted and the integration capability of cold-starting, also solved simultaneously the problem of wooden sodium prescription cold starting performance decay. Test data shows, carry out Performance Detection according to current international advanced VW5073 automobile start with the battery standard, the battery that adopts cathode lead plaster of the present invention to make, the basic mechanical design feature index can meet and exceed standard-required fully, can satisfy the requirement of user vehicle.

The specific embodiment

Cathode lead plaster of the present invention aims at for the automobile start valve control battery and designs, organic mixed expanded dose of the negative pole that it adopts, its suitable ratio is humic acid 0.5～0.8%, wooden sodium 0.1～0.2%, be equipped with acetylene black 0.2～0.3%, ultra-fine barium sulfate 0.5～0.8%, core technology is to add simultaneously wooden sodium and humic acid and strictly control adding proportion between the two. The results showed that the too high then low temperature of wooden sodium content is decayed seriously, is difficult for full charge, the too low starting capability of content is with regard to variation; The too low battery low-temperature stabilization of humic acid content performance is poor, and the too high then production cost of content increases, and is not suitable for batch production. The two an amount of mixing is used can take into account low temperature performance and charge acceptance, and makes battery obtain the longer life-span.

Table 2 is technical indicators (take the 60Ah battery as example) that the automobile start of this cathode lead plaster making of employing reaches through test with valve-control sealed lead acid battery:

Table 2

Sequence number	Interventions Requested	Test method (with reference to VW75073)	Unit	Adopt the automobile start valve-control sealed lead acid battery of this present invention aluminium cream	The valve control battery that directly adopts general rich solution maintenance-free lead accumulator lead plaster technique to make	General rich solution maintenance-free lead accumulator
							1	Capacity	Under 25 ± 2 ℃ of environment temperatures, battery 9.6A is discharged to 10.5V, capacity 〉=48Ah	Ah	53	50	52
2	Cold-starting (18 ℃)	Complete fully charged battery kept 20 hours in-18 ± 1 ℃ of environment at least, reach-18 ℃ fully to internal temperature of battery after, the 480A 10s that discharges, voltage 〉=7.5V, stop 10s after, the 280A discharge, 20s 〉=9V is discharged to time 〉=133s of 6.0V	V 10s   V 20s   s	8.87   9.98   201	8.58   9.76   182	8.83   9.92   188
							3	Capacity	With 1	Ah	50	44	50
4	Cold-starting (18 ℃)	With 2	V 10s   V 10s   s	8.47   9.69   190	8.53   9.7   179	8.75   9.86   173
							5	Current drain (charging is accepted)	With 9.6A discharge, the time be 1,3 discharge time half, then enter 0 ℃ of cryogenic box 24h, again with the 14.4V charging, charging current value 〉=15A of record 10min	A	15.7	14	15
6	175% life-span	In 27 ± 2 ℃ water-bath, 1. with the 12A 2.5h that discharges, battery tension≤10V stops; 2. use constant voltage 14.4V, the current limliting 21A 40min that charges; With the 21A 30min that discharges, charge and discharge circulation 85 times, battery tension≤10V stops 3. using constant voltage 15V, the current limliting 6A 18h that charges; 4. carrying out capacity test by article one then charges. 1.～4. consist of a unit, carry out cold-starting according to second behind every unit, the 480A 10s that discharges, voltage 〉=6V, stop 10s after, 280A discharge, 20s 〉=7.2V. At least 6 unit.		12	6	6
							7	50% life-span	In 40 ± 2 ℃ water-bath, 1. with the 15A 2h that discharges; 2. use constant voltage 16V, the current limliting 15A 5h that charges; Above-mentionedly 1., 2. consist of a circulation, when discharge voltage during less than 10.0V, end-of-life. At least 120 times		360	60	120
8	Confined reaction efficient	Test 〉=90% with reference to the JISC8702-1-19987.8 bar	％	98％		/

Can be found out that by table 2 data the automobile start that adopts the present invention to make has suitable cold-starting ability and good charging performance with valve-control sealed lead acid battery and general rich solution maintenance-free lead accumulator, and has obtained the longer life-span. But the valve control battery that directly adopts general rich solution maintenance-free lead accumulator lead plaster technique to make owing to be difficult to full charge under low-voltage, causes the life-span premature termination of battery.

Several instantiations below are provided:

Embodiment 1: be that 75%～85% lead powder adds in the paste mixing machine with 100kg PbO content, the fiber, 0.2kg acetylene black, the ultra-fine barium sulfate of 0.5kg, the sodium lignosulfonate of 0.1kg, the humic acid of 0.6kg that add simultaneously 0.05kg, above-mentioned material stirring is even, then add purifying waste water of 10kg, after hygrometric state mixed, drenching density fast was 1.400g/cm³The sulfuric acid solution 10kg of (25 ℃), and in the cream process control and cream temperature less than 65 ℃, reaction evenly and temperature drop to below 45 ℃, can go out the cream use. So-called ultra-fine barium sulfate refers to that particle diameter is less than 30 microns powder.

Embodiment 2: be that 75%～85% lead powder adds in the paste mixing machine with 100kgPbO content, the fiber, 0.25kg acetylene black, the ultra-fine barium sulfate of 0.7kg, the sodium lignosulfonate of 0.2kg, the humic acid of 055kg that add simultaneously 0.05kg, above-mentioned material stirring is even, then add purifying waste water of 11kg, after hygrometric state mixed, drenching density fast was 1.400g/cm³The sulfuric acid solution 9kg of (25 ℃), and in the cream process control and cream temperature less than 65 ℃, reaction evenly and temperature drop to below 45 ℃, can go out the cream use.

Embodiment 3: be that 75%～85% lead powder adds in the paste mixing machine with 100kg PbO content, the fiber, 0.4kg acetylene black, the ultra-fine barium sulfate of 0.8kg, the sodium lignosulfonate of 0.14kg, the humic acid of 0.8kg that add simultaneously 0.06kg, above-mentioned material stirring is even, then add purifying waste water of 12kg, after hygrometric state mixed, drenching density fast was 1.400g/cm³The sulfuric acid solution 8kg of (25 ℃), and in the cream process control and cream temperature less than 65 ℃, reaction evenly and temperature drop to below 45 ℃, can go out the cream use.

Embodiment 4: be that 75%～85% lead powder adds in the paste mixing machine with 100kgPbO content, the fiber, 0.3kg acetylene black, the ultra-fine barium sulfate of 0.6kg, the sodium lignosulfonate of 0.2kg, the humic acid of 0.50kg that add simultaneously 0.58kg, above-mentioned material stirring is even, then add purifying waste water of 11kg, after hygrometric state mixed, drenching density fast was 1.400g/cm³The sulfuric acid solution 9.5kg of (25 ℃), and in the cream process control and cream temperature less than 65 ℃, reaction evenly and temperature drop to below 45 ℃, can go out the cream use.

The cathode lead plaster of as stated above preparation is coated on the grid, solidifies 24h through 40 ℃, 98%RH, produce the negative plate of giving birth to through 70 ℃, the dry 24h of 20%RH again, just give birth to plate and can adopt automobile start valve control sealed battery anode diachylon and the manufacturing of pole plate manufacture technology.

Through pole plate change into, behind dry, minute plate, pole plate coats the AGM dividing plate, the private casing of packing into, sealing becomes the automobile start valve control sealed battery.

Claims (3)

1. automobile start negative lead cream of valve-controlled sealed plumbous acid accumulator, it is characterized in that: the solid material of described lead plaster is comprised of following substances: lead powder 100 weight portions, fiber 0.05～0.06 weight portion, acetylene black 0.2～0.4 weight portion, ultra-fine barium sulfate 0.5～0.8 weight portion, humic acid 0.5～0.8 weight portion, sodium lignosulfonate 0.1～0.2 weight portion, the particle diameter of ultra-fine barium sulfate is less than 30 microns.

2. automobile start negative lead cream of valve-controlled sealed plumbous acid accumulator according to claim 1, it is characterized in that: PbO content is 75-85% in the described aluminium powder.

3. automobile start according to claim 1 and 2 is with the preparation method of negative lead cream of valve-controlled sealed plumbous acid accumulator, and it is characterized in that: it is undertaken by following operation:

A. prepare burden: take by weighing each raw material by above-mentioned lead plaster solid material proportioning;

B. be dry mixed: above-mentioned lead plaster solid material is put into paste mixing machine be dry mixed;

C. wet mixing: the pure water that adds raw material weight 10～12% stirs;

D. drench acid: add raw material weight 8～10%, liquid-tight degree as 1.40g/cm take shape spray while stirring³Sulfuric acid, and the cream temperature goes out the cream temperature and is lower than 45 ℃ less than 65 ℃.