CN103341588A - Mold release agent used for lead acid battery grid casting and preparation method thereof - Google Patents

Mold release agent used for lead acid battery grid casting and preparation method thereof Download PDF

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Publication number
CN103341588A
CN103341588A CN201310203862XA CN201310203862A CN103341588A CN 103341588 A CN103341588 A CN 103341588A CN 201310203862X A CN201310203862X A CN 201310203862XA CN 201310203862 A CN201310203862 A CN 201310203862A CN 103341588 A CN103341588 A CN 103341588A
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China
Prior art keywords
component
parts
releasing agent
grid
water
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CN201310203862XA
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CN103341588B (en
Inventor
罗建华
杜灵阳
史伯荣
黄文�
代飞
李常飞
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Zhejiang Tianneng Power Energy Co Ltd
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Zhejiang Tianneng Power Energy Co Ltd
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Abstract

The invention discloses a mold release agent used for lead acid battery grid casting and a preparation method thereof. The mold release agent used for the lead acid battery grid casting is mixed by a component A and a component B according to a weight ratio of 7 : 210 to 7 : 220, wherein the component A comprises raw materials by weight parts: 100 parts of phosphoric acid, 18-22 parts of aluminium hydroxide and 45.65-49.65 parts of water, with the phosphoric acid being added on a basis of 100 % purity; the component B comprises raw materials by weight parts: 100 parts of water, 3.5-4 parts of cork powder and 3-3.5 parts of sodium silicate, with a molar concentration of the sodium silicate being 3.1-3.4 M. The invention further discloses the preparation method of the mold release agent used for the lead acid battery grid casting. The mold release agent provided by the invention is not liable to fall off and strong in wearing property, and can reduce spraying times during a grid production, save spraying time and improve production efficiency. By using the mold release agent, weight and thickness of the grid are uniform, and pores are basically not generated.

Description

Lead acid accumulator plate grid casting releasing agent and preparation method thereof
Technical field
The present invention relates to battery production technical field, relate in particular to a kind of lead acid accumulator plate grid casting releasing agent and preparation method thereof.
Background technology
Grid is one of core component of lead-acid accumulator, in lead-acid accumulator, grid is as the carrier of active material, playing a part skeleton supports and the adhesion activity material, simultaneously, grid also plays a part afflux, confluxes and fails stream as the conductor of electric current, and in addition, grid also can make electric current be evenly distributed in the active material as the current-sharing body of pole plate.
At present, the processing technology of grid mainly contains casting and die casting, and most grid is to be made by gravity casting by lead-containing alloy, is cast in the mould of grid after the lead-containing alloy fusing that is about to configure.In when casting, the releasing agent subsidiary products that is absolutely necessary, on the one hand, releasing agent makes that grid is more prone to deviate from from mould; On the other hand, because mould is that metal is made, so there are the characteristics of rapid heat dissipation, the dies cavity groove is narrow shallow in addition, make the alloy liquid of fusing be difficult to be full of mould, therefore, the spraying releasing agent can guarantee the flowability of alloy between die surface and cast alloys, guarantees the ratio of briquetting of casting grid.
Therefore, the quality of releasing agent directly influences the quality of grid casting, and the releasing agent configuration is bad, not only influences demoulding efficiency, influences production efficiency, produces pore or crackle etc. in the time of also may causing the grid casting, influences the current conductivity energy.
At present, generally use cork powder in lead-acid accumulator factory, the releasing agent of sodium metasilicate and water preparation is sprayed on dies cavity, effects such as performance insulation, heat insulation, lubricated, the demoulding.
Be that the Chinese patent literature of 102873265A discloses a kind of casting lead acid battery grid releasing agent as publication number, this releasing agent is made up of following material and part by weight: 100 ± 2 parts in water, 4.2 ± 0.1 parts of cork powders, 2.4 ± 0.05 parts of sodium metasilicate, 0.5 ± 0.03 part of phosphoric acid, 0.45 ± 0.02 part of ripe rubber powder, 0.08 ± 0.02 part of aerosil.Above-mentioned casting lead acid battery grid may further comprise the steps with the compound method of releasing agent: (1) joins deionized water, sodium metasilicate, the ripe rubber powder of formula ratio and is heated to 80 ± 2 ℃ of temperature in the Aluminum Drum; (2) slowly cork powder, the aerosil of formula ratio joined in the gained solution and constantly and stir, be dispersed in the water until cork powder and aerosil; (3) continuing the little fire of heating boiled 30 minutes; (4) phosphoric acid of formula ratio is added wherein after stopping to heat and fully stirred 2~3 minutes.
The problem of existing releasing agent ubiquity poor durability, generally, releasing agent of every spraying, 1000~3000 grids of general production need often brush mould, the spraying releasing agent, influence production efficiency, unstable product quality, and plumbous calcium series alloy grid also existed the problem of easy generation pore, unstable product quality.
Summary of the invention
The invention provides the casting of a kind of lead acid accumulator plate grid and use releasing agent, durability is strong, has reduced releasing agent and has sprayed number of times, and overcome the problem that grid easily produces pore.
A kind of lead acid accumulator plate grid casting releasing agent is mixed by weight 7:210~7:220 by component A and B component, and wherein, in weight portion, the raw material of component A comprises:
00 part of phosphatase 11
18~22 parts in aluminium hydroxide
45.65~49.65 parts in water;
Wherein the phosphoric acid folding hundred;
In weight portion, the raw material of B component comprises:
100 parts in water
3.5~4 parts of cork powders
3~3.5 parts of waterglass;
Wherein the waterglass molar concentration is 3.1~3.4M.
Usually in the industrial production, the phosphoric acid that uses is about 85% liquid as mass fraction, among the present invention, during the weight portion of calculating, phosphoric acid has been converted to 100% concentration.If in use adopt the phosphoric acid of other concentration, the water in the phosphoric acid accumulative total water to the component A then.
Waterglass is being commonly called as of the aqueous solution of sodium metasilicate, and the modulus (molar concentration) that is generally used for the waterglass of releasing agent preparation is 3.1~3.4M.Waterglass has refered in particular to concrete concentration range among the present invention, so the water of accumulated value to the B component no longer of the water in the waterglass.
Described grid is lead-calcium alloy slab lattice.
Preferably, in weight portion, the raw material of component A comprises:
00 part of phosphatase 11
20~20.5 parts in aluminium hydroxide
45.65~47.65 parts in water.
Preferably, in weight portion, the raw material of B component comprises:
100 parts in water
3.5~3.75 parts of cork powders
3.25~3.5 parts of waterglass.
Preferably, the weight ratio of component A and B component is 7:213~7:215.
In the raw material of component A and B component, described water is the deionized water of electrical conductivity≤10 μ S.Avoid the impurity in the water to cause plumbous liquid circulation and exhaust to be obstructed, avoid grid to produce pore.
In the raw material of B component, the cork powder water content is≤1%, and granularity is 200~600 orders.
Preferably, the granularity of cork powder is 600 orders.Releasing agent is attached on the grid mould uniformly, is heated conduction evenly, plumbous flow and exhaust phase be to smooth and easy, strong adhesion, and difficult drop-off, thus the weight of grid and thickness are even.
The present invention also provides the preparation method of a kind of lead acid accumulator plate grid casting with releasing agent, comprising:
(1) phosphoric acid is heated to 78~85 ℃, adding aluminium hydroxide stirs into pasty state, adds water to stir again, and makes component A;
(2) water and waterglass are heated to 98~100 ℃, add cork powder and stir, make B component, add the component A that step (1) makes again, stir and namely get described releasing agent.
Preferably, in the step (1), phosphoric acid is heated to 80~82 ℃, more preferably 80 ℃.
Preferably, in the step (2), water and waterglass are heated to 99~100 ℃, more preferably 100 ℃.
Compared with prior art, beneficial effect of the present invention is:
(1) releasing agent difficult drop-off of the present invention, durability is strong, has reduced the spraying number of times of releasing agent during grid is produced, and has saved spray time, has increased the effective production time of grid, has improved production efficiency.
(2) utilize releasing agent of the present invention, grid weight and thickness are even, do not produce pore substantially.
The specific embodiment
Below in conjunction with specific embodiment the present invention is done further explaination.
Among the embodiment 1~5, deionization electrical conductivity of water≤10 μ S;
Cork powder (600 order) is available from Dongtai City, Jiangsu Province wood powder Co., Ltd of Neusoft of shaking;
(modulus is 3.1~3.4M) to fly to reach the chemical plant available from Changxing, Zhejiang county magistrate's bridge to waterglass.
Embodiment 1
One, raw material
Two, preparation method
(1) the little fire of phosphoric acid (general about 20min be heated to temperature required) is heated to 80 ℃, adds aluminium hydroxide and stir into pasty state, it is even to add the 300g deionized water and stirring again;
(2) 2000g deionized water and waterglass are mixed, be heated to 100 ℃, add cork powder and stir, add the mixed liquor 70g that step (1) makes again, stir and namely get described releasing agent.
Three, interpretation of result
The releasing agent of preparation is uniformly sprayed on the grid casting mould, carry out the casting of grid (lead-calcium alloy slab lattice), anode plate grid is cast with the speed of 14/min with 13/min, negative electrode grid, carries out statistical computation by 8 hours per tour systems.
Find in the production, use the releasing agent of present embodiment, be only to spray twice releasing agent in per 8 hours in per tour, spray releasing agent delay 30min one time, after 8 hours, 5460 of anode plate grids can be produced, 5880 of negative electrode grids can be produced, grid weight and the thickness produced are even, do not have pore substantially.
Embodiment 2
One, raw material
Cork powder is available from Dongtai City, Jiangsu Province wood powder Co., Ltd of Neusoft of shaking, and waterglass flies to reach the chemical plant available from Changxing, Zhejiang;
Two, preparation method
(1) the little fire of phosphoric acid (general about 20min be heated to temperature required) is heated to 81 ℃, adds aluminium hydroxide and stir into pasty state, it is even to add the 300g deionized water and stirring again;
(2) 2000g deionized water and waterglass are mixed, be heated to 100 ℃, add cork powder and stir, add the mixed liquor 70g that step (1) makes again, stir and namely get described releasing agent.
Three, interpretation of result
The releasing agent of preparation is uniformly sprayed on the grid casting mould, carry out the casting of grid (lead-calcium alloy slab lattice), anode plate grid is cast with the speed of 14/min with 13/min, negative electrode grid, carries out statistical computation by 8 hours per tour systems.
Find in the production, use the releasing agent of present embodiment, be only to spray twice releasing agent in per 8 hours in per tour, spray releasing agent delay 30min one time, after 8 hours, 5460 of anode plate grids can be produced, 5880 of negative electrode grids can be produced, grid weight and the thickness produced are even, do not have pore substantially.
Embodiment 3
One, raw material
Cork powder is available from Dongtai City, Jiangsu Province wood powder Co., Ltd of Neusoft of shaking, and waterglass flies to reach the chemical plant available from Changxing, Zhejiang;
Two, preparation method
(1) the little fire of phosphoric acid (general about 20min be heated to temperature required) is heated to 82 ℃, adds aluminium hydroxide and stir into pasty state, it is even to add the 290g deionized water and stirring again;
(2) 2000g deionized water and waterglass are mixed, be heated to 99 ℃, add cork powder and stir, add the mixed liquor 70g that step (1) makes again, stir and namely get described releasing agent.
Three, interpretation of result
The releasing agent of preparation is uniformly sprayed on the grid casting mould, carry out the casting of grid (lead-calcium alloy slab lattice), anode plate grid is cast with the speed of 14/min with 13/min, negative electrode grid, carries out statistical computation by 8 hours per tour systems.
Find in the production, use the releasing agent of present embodiment, be only to spray twice releasing agent in per 8 hours in per tour, spray releasing agent delay 30min one time, after 8 hours, 5460 of anode plate grids can be produced, 5880 of negative electrode grids can be produced, grid weight and the thickness produced are even, do not have pore substantially.
Embodiment 4
One, raw material
Cork powder is available from Dongtai City, Jiangsu Province wood powder Co., Ltd of Neusoft of shaking, and waterglass flies to reach the chemical plant available from Changxing, Zhejiang;
Two, preparation method
(1) the little fire of phosphoric acid (general about 20min be heated to temperature required) is heated to 78 ℃, adds aluminium hydroxide and stir into pasty state, it is even to add the 280g deionized water and stirring again;
(2) 2000g deionized water and waterglass are mixed, be heated to 99 ℃, add cork powder and stir, add the mixed liquor 70g that step (1) makes again, stir and namely get described releasing agent.
Three, interpretation of result
The releasing agent of preparation is uniformly sprayed on the grid casting mould, carry out the casting of grid (lead-calcium alloy slab lattice), anode plate grid is cast with the speed of 14/min with 13/min, negative electrode grid, carries out statistical computation by 8 hours per tour systems.
Find in the production, use the releasing agent of present embodiment, be only to spray three times releasing agent in per 8 hours in per tour, spray releasing agent delay 30min one time, after 8 hours, 5070 of anode plate grids can be produced, 5460 of negative electrode grids can be produced, grid weight and the thickness produced are even, do not have pore substantially.
Embodiment 5
One, raw material
Cork powder is available from Dongtai City, Jiangsu Province wood powder Co., Ltd of Neusoft of shaking, and waterglass flies to reach the chemical plant available from Changxing, Zhejiang;
Two, preparation method
(1) the little fire of phosphoric acid (general about 20min be heated to temperature required) is heated to 85 ℃, adds aluminium hydroxide and stir into pasty state, it is even to add the 320g deionized water and stirring again;
(2) 2000g deionized water and waterglass are mixed, be heated to 98 ℃, add cork powder and stir, add the mixed liquor 70g that step (1) makes again, stir and namely get described releasing agent.
Three, interpretation of result
The releasing agent of preparation is uniformly sprayed on the grid casting mould, carry out the casting of grid (lead-calcium alloy slab lattice), anode plate grid is cast with the speed of 14/min with 13/min, negative electrode grid, carries out statistical computation by 8 hours per tour systems.
Find in the production, use the releasing agent of present embodiment, be only to spray three times releasing agent in per 8 hours in per tour, spray releasing agent delay 30min one time, after 8 hours, 5070 of anode plate grids can be produced, 5460 of negative electrode grids can be produced, grid weight and the thickness produced are even, do not have pore substantially.
Embodiment 6
One, raw material
Cork powder is available from Dongtai City, Jiangsu Province wood powder Co., Ltd of Neusoft of shaking, and waterglass flies to reach the chemical plant available from Changxing, Zhejiang;
Two, preparation method
(1) the little fire of phosphoric acid (general about 20min be heated to temperature required) is heated to 80 ℃, adds aluminium hydroxide and stir into pasty state, it is even to add the 305g deionized water and stirring again;
(2) 2000g deionized water and waterglass are mixed, be heated to 99 ℃, add cork powder and stir, add the mixed liquor 70g that step (1) makes again, stir and namely get described releasing agent.
Three, interpretation of result
The releasing agent of preparation is uniformly sprayed on the grid casting mould, carry out the casting of grid (lead-calcium alloy slab lattice), anode plate grid is cast with the speed of 14/min with 13/min, negative electrode grid, carries out statistical computation by 8 hours per tour systems.
Find in the production, use the releasing agent of present embodiment, be only to spray three times releasing agent in per 8 hours in per tour, spray releasing agent delay 30min one time, after 8 hours, 5070 of anode plate grids can be produced, 5460 of negative electrode grids can be produced, grid weight and the thickness produced are even, do not have pore substantially.
Comparative Examples
Be prescription and the preparation method of the disclosed releasing agent of Chinese patent literature of 102873265A with reference to publication number:
(1) joins the deionized water 10Kg of electrical conductivity≤10 μ s/cm, industrial primes powdery sodium silicate 240g, the ripe rubber powder 45g of industrial primes in the Aluminum Drum and be heated to 80 ℃ of temperature;
(2) be 200m with 600 purpose cork powder 420g, specific area slowly 2The aerosil 8g of/g is added to the water and constantly stirs, and is dispersed in the water until cork powder and aerosil;
(3) continuing the little fire of heating boiled 30 minutes;
(4) stop to analyze pure phosphoric acid 50g adding and abundant the stirring 3 minutes after the heating;
(5) before using, the releasing agent cooling back for preparing crosses 60 mesh sieves.
Three, interpretation of result
The releasing agent of preparation is uniformly sprayed on the grid casting mould, carry out the casting of grid, anode plate grid is cast with the speed of 14/min with 13/min, negative electrode grid, carries out statistical computation by 8 hours per tour systems.
Find in the production, use the releasing agent of present embodiment, be to need five releasing agents of spraying in per 8 hours in per tour, spray releasing agent delay 30min one time, after 8 hours, can produce 4290 of anode plate grids, can produce 4620 of negative electrode grids, pore many than embodiment 1~6 in the grid of producing, and have 6 to have a large amount of pores, do not meet standard.
As fully visible, in grid is produced, releasing agent per tour of the present invention only need spray 2~3 times, and existing releasing agent need spray more than at least four times, this has just reduced delaying of spraying, improved production efficiency, compared with Comparative Examples, the highest raising more than 27% of productivity ratio of positive and negative electrode grid.Simultaneously, use releasing agent of the present invention, the quality of grid is easy to control, does not produce pore substantially.

Claims (8)

1. a lead acid accumulator plate grid casting releasing agent is mixed by weight 7:210~7:220 by component A and B component, and wherein, in weight portion, the raw material of component A comprises:
00 part of phosphatase 11
18~22 parts in aluminium hydroxide
45.65~49.65 parts in water;
Wherein the phosphoric acid folding hundred;
In weight portion, the raw material of B component comprises:
100 parts in water
3.5~4 parts of cork powders
3~3.5 parts of waterglass;
Wherein the waterglass molar concentration is 3.1~3.4M.
2. releasing agent is used in lead acid accumulator plate grid casting as claimed in claim 1, it is characterized in that in weight portion, the raw material of component A comprises:
00 part of phosphatase 11
20~20.5 parts in aluminium hydroxide
45.65~47.65 parts in water.
3. releasing agent is used in lead acid accumulator plate grid casting as claimed in claim 1, it is characterized in that in weight portion, the raw material of B component comprises:
100 parts in water
3.5~3.75 parts of cork powders
3.25~3.5 parts of waterglass.
4. releasing agent is used in lead acid accumulator plate grid casting as claimed in claim 1, it is characterized in that the weight ratio of component A and B component is 7:213~7:215.
5. releasing agent is used in lead acid accumulator plate grid casting as claimed in claim 1, it is characterized in that in the raw material of component A and B component, described water is the deionized water of electrical conductivity≤10 μ S.
6. releasing agent is used in lead acid accumulator plate grid casting as claimed in claim 1, it is characterized in that, and in the raw material of B component, the water content of cork powder≤1%, granularity is 200~600 orders.
7. a lead acid accumulator plate grid is cast the preparation method who uses releasing agent, comprising:
(1) phosphoric acid is heated to 78~85 ℃, adding aluminium hydroxide stirs into pasty state, adds water to stir again, and makes component A;
(2) water and waterglass are heated to 98~100 ℃, add cork powder and stir, make B component, add the component A that step (1) makes again, stir and namely get described releasing agent.
8. preparation method as claimed in claim 7 is characterized in that, in the step (1), phosphoric acid is heated to 80~82 ℃.
CN201310203862.XA 2013-05-28 2013-05-28 Lead acid accumulator plate grid releasing agent used for casting and preparation method thereof Active CN103341588B (en)

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Cited By (4)

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CN105710286A (en) * 2016-04-06 2016-06-29 天能电池集团(安徽)有限公司 Releasing agent for casting of lead-acid storage battery grid
CN106111885A (en) * 2016-08-25 2016-11-16 四川荣联电子科技有限公司 The preparation method of lead-acid accumulator releasing agent
CN108339931A (en) * 2018-03-14 2018-07-31 天能电池集团(安徽)有限公司 A kind of battery grid releasing agent and its preparation method
CN110293204A (en) * 2019-08-05 2019-10-01 江西新威动力能源科技有限公司 A kind of grid casting release agent and maturation technique

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CN105710286A (en) * 2016-04-06 2016-06-29 天能电池集团(安徽)有限公司 Releasing agent for casting of lead-acid storage battery grid
CN106111885A (en) * 2016-08-25 2016-11-16 四川荣联电子科技有限公司 The preparation method of lead-acid accumulator releasing agent
CN108339931A (en) * 2018-03-14 2018-07-31 天能电池集团(安徽)有限公司 A kind of battery grid releasing agent and its preparation method
CN110293204A (en) * 2019-08-05 2019-10-01 江西新威动力能源科技有限公司 A kind of grid casting release agent and maturation technique

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