CN102747400A - Uniform-current-density electrode foil formation method and uneven mesh type insulation board - Google Patents
Uniform-current-density electrode foil formation method and uneven mesh type insulation board Download PDFInfo
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- CN102747400A CN102747400A CN2012102334281A CN201210233428A CN102747400A CN 102747400 A CN102747400 A CN 102747400A CN 2012102334281 A CN2012102334281 A CN 2012102334281A CN 201210233428 A CN201210233428 A CN 201210233428A CN 102747400 A CN102747400 A CN 102747400A
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Abstract
The invention discloses a uniform-current-density electrode foil formation method and an uneven mesh type insulation board. The formation method includes the following steps that: a direct current field used for generating forming current is distributed between an electrode foil used as anode and a plate electrode used as cathode, and the uneven mesh type insulation board used for preventing the electrode foil from contacting with the plate electrode to avoid blast is arranged between the electrode foil and the plate electrode, wherein the uneven mesh type insulation board is provided with a plurality of holes with uneven apertures and/or uneven pitches; and through the holes, the forming liquid resistance between the electrode foil and the plate electrode is changed so that the current density of the forming current used for the growth of an electrode foil oxidation film can tend to be even so as to obtain the electrode foil oxidation film growing at constant speed. The uniform-current-density electrode foil formation method and the uneven mesh type insulation board disclosed by the invention can realize the advantages that the uniformity of the current density is good, the structure of the oxidation film is compact, and the electrode foil has good electric property and high mechanical strength.
Description
Technical field
The present invention relates to the electrode foil production technical field, particularly, relate to the electrode foil chemical synthesizing method and the netted insulcrete of inhomogeneous type of uniform current density.
Background technology
In the formation process in the electrode foil production process, make through the DC electric field between battery lead plate and the paper tinsel between battery lead plate and paper tinsel, to be provided with netted insulcrete with holes by oxide growth; Netted insulcrete with holes only plays preventing that battery lead plate (negative pole) from contacting the effect of fried fire with electrode foil (positive pole).
For example, in existing electrode foil chemical synthesizing method, be on the insulcrete (as shown in Figure 1) of battery lead plate periphery, be uniform-distribution with the identical hole of size; In the electrode foil formation process, between two electrodes, apply certain impressed voltage and keep this impressed voltage constant, the initial stage forms the current density maximum of electric current, along with the growth of electrode foil sull, forms electric current and successively decreases one by one downwards.
On the netted insulcrete that uses in the above-mentioned chemical synthesizing method, the identical and uniform distribution of hole size.Electrode foil is in formation process; The formation electric current that makes oxide growth is skewness (have in the electrode foil chemical synthesizing method current density and time relation referring to Fig. 3) from top to bottom, and electrode foil has just got into the electrolytic bath initial stage when changing into, and current density is excessive; Reaction is violent; Sull is growth rapidly in the early stage, makes the sull short texture, influences the electrical property and the mechanical property of electrode foil product.
In realizing process of the present invention, defective such as the contriver finds to exist at least in the prior art that uniformity of current density is poor, the poor electrical performance of sull short texture and electrode foil and physical strength are low.
Summary of the invention
The objective of the invention is to,, propose a kind of electrode foil chemical synthesizing method of uniform current density to the problems referred to above, with realize that uniformity of current density is good, the good electrical property and the high advantage of physical strength of sull compact structure and electrode foil.
Another object of the present invention is to, propose the netted insulcrete of inhomogeneous type that uses in the electrode foil chemical synthesizing method of the above uniform current density.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is: a kind of electrode foil chemical synthesizing method of uniform current density comprises:
As the anodal electrode foil with as between the battery lead plate of negative pole, be distributed with the DC electric field that is used to produce the formation electric current, this formation electric current is used to make the electrode foil oxide growth;
Between said electrode foil and battery lead plate, also be provided with and be used to prevent that electrode foil from contacting with battery lead plate and the netted insulcrete of inhomogeneous type of fried fire, a plurality of holes that the netted insulcrete of this inhomogeneous type has inhomogeneous aperture and/or on-uniform porosity distance;
Through a plurality of holes on the netted insulcrete of said inhomogeneous type; Change the formation liquid resistance between said electrode foil and the battery lead plate; The feasible current density that is used for the formation electric current of electrode foil oxide growth is tending towards uniform distribution, the electrode foil sull of at the uniform velocity being grown.
Further, the netted insulcrete of said inhomogeneous type comprises the plate body, and is opened on the said plate body and a plurality of holes with inhomogeneous aperture and/or on-uniform porosity distance.
Further, on said plate body, the pitch-row in a plurality of holes between the adjacent holes reduces from an end to the other end of plate body gradually; And/or the aperture of a plurality of holes increases from an end to the other end of plate body gradually.
Simultaneously; Another technical scheme that the present invention adopts is: the netted insulcrete of inhomogeneous type that uses in the electrode foil chemical synthesizing method of more than one said uniform current densities; Comprise the plate body, and be opened on the said plate body and a plurality of holes with inhomogeneous aperture and/or on-uniform porosity distance.
Further, on said plate body, the pitch-row of adjacent holes in a plurality of holes reduces from an end to the other end of plate body gradually; And/or the aperture of a plurality of holes increases from an end to the other end of plate body gradually.
The electrode foil chemical synthesizing method of the uniform current density of various embodiments of the present invention and the netted insulcrete of inhomogeneous type; Because this chemical synthesizing method comprises: be used as the anodal electrode foil and be used as between the battery lead plate of negative pole; Be distributed with and be used to produce the DC electric field that forms electric current; And be provided with and be used to prevent that electrode foil from contacting with battery lead plate and the netted insulcrete of inhomogeneous type of fried fire, a plurality of holes that the netted insulcrete of this inhomogeneous type has inhomogeneous aperture and/or on-uniform porosity distance; Through these a plurality of holes, change the formation liquid resistance between electrode foil and the battery lead plate, the feasible current density that is used for the formation electric current of electrode foil oxide growth is tending towards uniform distribution, the electrode foil sull of at the uniform velocity being grown; Through the netted insulcrete of this inhomogeneous type, not only play preventing that battery lead plate (negative pole) from contacting the effect of fried fire with electrode foil (positive pole), and can be so that the current density in the electrode foil formation process is tending towards uniform distribution; Thereby can overcome that uniformity of current density in the prior art is poor, the poor electrical performance and the low defective of physical strength of sull short texture and electrode foil, with realize that uniformity of current density is good, the good electrical property and the high advantage of physical strength of sull compact structure and electrode foil.
Other features and advantages of the present invention will be set forth in specification sheets subsequently, and, partly from specification sheets, become obvious, perhaps understand through embodiment of the present invention.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification sheets, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation of the outside netted insulcrete of battery lead plate in the existing electrode foil chemical synthesizing method;
Fig. 2 is the structural representation of the netted insulcrete of inhomogeneous type in the electrode foil chemical synthesizing method of uniform current density of the present invention;
Fig. 3 is current density and time relation synoptic diagram in the existing electrode foil chemical synthesizing method;
Fig. 4 is for forming voltage and time relation synoptic diagram in the existing electrode foil chemical synthesizing method;
Fig. 5 is for forming the corresponding time relation synoptic diagram of electric current in the electrode foil chemical synthesizing method of uniform current density of the present invention.
In conjunction with accompanying drawing, Reference numeral is following in the embodiment of the invention:
1-first hole; 2-second hole.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
Chemical synthesizing method embodiment
According to the embodiment of the invention,, a kind of electrode foil chemical synthesizing method of uniform current density is provided like Fig. 2, Fig. 4 and shown in Figure 5.The electrode foil chemical synthesizing method of the uniform current density of present embodiment comprises:
Step 1: as the anodal electrode foil with as between the battery lead plate of negative pole, be distributed with the DC electric field that is used to produce the formation electric current, this formation electric current is used to make the electrode foil oxide growth;
Step 2: between electrode foil and battery lead plate, also be provided with and be used to prevent that electrode foil from contacting with battery lead plate and the netted insulcrete of inhomogeneous type of fried fire, a plurality of holes that the netted insulcrete of this inhomogeneous type has inhomogeneous aperture and/or on-uniform porosity distance;
Step 3: through a plurality of holes on the netted insulcrete of inhomogeneous type in the step 2; Change the formation liquid resistance between electrode foil and the battery lead plate; The feasible current density that is used for the formation electric current of electrode foil oxide growth is tending towards uniform distribution, the electrode foil sull of at the uniform velocity being grown.
In the electrode foil formation process shown in the above-mentioned steps 1-step 3; Sull is grown under the DC electric field effect; DC electric field is distributed between electrode foil and the battery lead plate; Promptly between battery lead plate and electrode foil, there is the formation electric current I that makes the electrode foil oxide growth to form; This chemical synthesizing method be on insulcrete, distribute progressively change from small to big from top to bottom, hole from sparse to dense, the netted insulcrete of this inhomogeneous type changes the formation liquid resistance between battery lead plate and the electrode foil, makes the formation electric current of electrode foil oxide growth be tending towards uniform distribution.
In above-mentioned steps 2 and step 3, the netted insulcrete of above-mentioned inhomogeneous type comprises the plate body, and is opened on the plate body and has inhomogeneous aperture and/or a plurality of holes of on-uniform porosity distance (like first hole 1 and second hole 2 etc.).
On above-mentioned plate body, the distribution situation of a plurality of holes can be: the pitch-row in a plurality of holes between the adjacent holes reduces from an end to the other end of plate body gradually; And/or the aperture of a plurality of holes increases from an end to the other end of plate body gradually.
Because the top hole of the netted insulcrete of above-mentioned inhomogeneous type is little and thin, the bottom hole is big and close; Like this; The hole of inhomogeneous netted insulcrete progressively changes from small to big from top to bottom, from sparse to dense; Promptly change the solution resistance between battery lead plate and the electrode foil, make the formation current density of electrode foil oxide growth be tending towards uniform distribution.
During practical implementation, the electrode foil chemical synthesizing method of the uniform current density of the foregoing description can adopt framework, battery lead plate and the netted insulcrete of inhomogeneous type; In the electrode foil formation process; Sull is grown under the DC electric field effect; DC electric field is distributed between electrode foil and the battery lead plate, is provided with the netted insulcrete of inhomogeneous type between electrode foil and the battery lead plate, and the netted insulcrete of inhomogeneous type plays the effect of evenly distributing electric current density.
Changing into liquid is conductor, and its electricalresistivity is constant, and the hole size area A is regarded as conductor cross-sectional area; Distance is conductor length L between electrode foil and the battery lead plate; Then the liquid resistance that changes between each unit hole is R=ρ * L/A, and the number in each round hole is N, and then the liquid resistance that changes in the formation process is R solution=ρ * L/ (N*A) between each round hole; Wherein ρ, L are constant, and chemical solution resistance between then every round hole and hole area and number are inversely proportional to.
Form electric current I formation=(V-V is withstand voltage)/R, V the power supply impressed voltage when changing into, and its value is constant, and V is withstand voltage to be in the electrode foil oxide growth process; Sull has certain withstand voltage, and the sull withstand voltage thickens with sull and increases, so the pressure drop V solution=V-V of solution is withstand voltage; In the formation process, from top to bottom, V is withstand voltage to be increased gradually; It is constant to add impressed voltage V when changing into, and solution pressure drop V solution then reduces gradually, and the change curve of solution pressure drop is as shown in Figure 5; In this chemical synthesizing method, hole increases increase from top to bottom gradually, and promptly hole area N*A increases gradually, and because of resistance R solution and hole area N*A are inversely proportional to, then resistance R solution reduces gradually; Form electric current when changing into: I formation=I solution=V solution/R solution.At this moment, control hole area N*A makes the rate of curve of volts lost of change curve and V solution of solution resistance R solution same or similar, realizes then in the formation process that I forms constant or is tending towards constant, and is as shown in Figure 5, reached the effect that evenly changes into current density.
In the electrode foil chemical synthesizing method of the uniform current density of the foregoing description, through calculating, the size of hole and distributing on the netted insulcrete of inhomogeneous type of even electroplax, as shown in Figure 2.
The beneficial effect of the electrode foil chemical synthesizing method of the uniform current density of the foregoing description is: the enforcement of this method; Avoided electrode foil (when just getting into electrolytic bath) current density when just beginning to change into excessive; Reaction is violent, and oxide growth is too fast, causes the sull short texture because sull is grown fast; Use through even electroplax (being the netted insulcrete of inhomogeneous type); Make the electrode foil sull more progressively grow (the oxide growth speed that is electrode foil is even), the sull compact structure has been realized the improvement of counter electrode paper tinsel electrical property and mechanical property.
With the electrode foil chemical synthesizing method of the uniform current density of electrode foil chemical synthesizing method of the prior art and the foregoing description, it is following to compare result of experiment:
⑴ apply to high pressure and change into:
Change into the etched foil of same size:
The 530VF test, C=0.68-0.69uF/cm
2, bending=70 time;
1. change into the back through electrode foil chemical synthesizing method of the prior art:
The 530VF test, C=0.67-0.68uF/cm
2, bending: 120 times;
2. the electrode foil chemical synthesizing method of the uniform current density of process the foregoing description changes into the back:
The 530VF test, C=0.7-0.71uF/cm
2, bending: 135 times;
Apply to the experimental result that high pressure changes into and can learn by above-mentioned: the electrode foil chemical synthesizing method of the uniform current density of the foregoing description, can promote capacity 3-5%, bending improves about 15 times.
⑵ apply to low pressure and change into:
Change into the etched foil of same size: 132VF test, C=5.2-5.3uF/cm
2
1. change into the back through electrode foil chemical synthesizing method of the prior art:
132 VF test, C=5.0-5.1uF/cm
2, bending: 45-50 returns;
2. the electrode foil chemical synthesizing method of the uniform current density of process the foregoing description changes into the back:
The 132VF test, C=5.5-5.8uF/cm
2, bending: 60-65 returns;
Apply to the experimental result that low pressure changes into and can learn by above-mentioned: the electrode foil chemical synthesizing method of the uniform current density of the foregoing description, can promote capacity 10-13%, bending improves about 15 times.
The electrode foil chemical synthesizing method of the uniform current density of the foregoing description; Relate to the current density technology that evenly changes in the electrode foil production process; Purpose is the deficiency that overcomes prior art; Provide in a kind of electrode foil formation process, form the equally distributed chemical synthesizing method of electric current when making the electrode foil oxide growth.
The electrode foil chemical synthesizing method of the uniform current density of the foregoing description is that uneven distribution the hole that varies in size on the peripheral insulcrete of battery lead plate, and these holes progressively change from small to big from top to bottom, from sparse to dense; Its principle is: because the resistivity of solution is constant, change the conductive area between battery lead plate and the paper tinsel, reach the resistance that changes solution between battery lead plate and the paper tinsel; Because impressed voltage is constant, thereby changed the size of current between battery lead plate and the paper tinsel, in changing into along with the growth of sull; The withstand voltage of sull increases, and the hole on the battery lead plate increases increase at this moment, has realized the conductive area increase; Be that the solution resistance value reduces between battery lead plate and electrode foil; The volts lost of solution resistance reduces, thereby makes the formation size of current that forms sull be tending towards constant, has reached the effect of uniform current density when then changing into.
The netted insulcrete embodiment of inhomogeneous type
According to the embodiment of the invention, provide a kind of inhomogeneous type netted insulcrete.As shown in Figure 2, present embodiment comprises the plate body, and is opened on the plate body and has inhomogeneous aperture and/or a plurality of holes of on-uniform porosity distance (like first hole 1 and second hole 2 etc.).
On above-mentioned plate body, the pitch-row of adjacent holes in a plurality of holes reduces from an end to the other end of plate body gradually; And/or the aperture of a plurality of holes increases from an end to the other end of plate body gradually.
The netted insulcrete of inhomogeneous type of the foregoing description can be used for the electrode foil chemical synthesizing method of uniform current density.In the electrode foil formation process, sull is grown under the DC electric field effect, and DC electric field is distributed between electrode foil and the battery lead plate, and the netted insulcrete of this inhomogeneous type can be set between electrode foil and the battery lead plate; This netted insulcrete not only plays preventing that battery lead plate (negative pole) from contacting the effect of fried fire with electrode foil (positive pole), and can be so that the current density in the electrode foil formation process is tending towards uniform distribution.
What should explain at last is: the above is merely the preferred embodiments of the present invention; Be not limited to the present invention; Although the present invention has been carried out detailed explanation with reference to previous embodiment; For a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the electrode foil chemical synthesizing method of a uniform current density is characterized in that, comprising:
As the anodal electrode foil with as between the battery lead plate of negative pole, be distributed with the DC electric field that is used to produce the formation electric current, this formation electric current is used to make the electrode foil oxide growth;
Between said electrode foil and battery lead plate, also be provided with and be used to prevent that electrode foil from contacting with battery lead plate and the netted insulcrete of inhomogeneous type of fried fire, a plurality of holes that the netted insulcrete of this inhomogeneous type has inhomogeneous aperture and/or on-uniform porosity distance;
Through a plurality of holes on the netted insulcrete of said inhomogeneous type; Change the formation liquid resistance between said electrode foil and the battery lead plate; The feasible current density that is used for the formation electric current of electrode foil oxide growth is tending towards uniform distribution, the electrode foil sull of at the uniform velocity being grown.
2. the electrode foil chemical synthesizing method of uniform current density according to claim 1; It is characterized in that; The netted insulcrete of said inhomogeneous type comprises the plate body, and is opened on the said plate body and a plurality of holes with inhomogeneous aperture and/or on-uniform porosity distance.
3. the electrode foil chemical synthesizing method of uniform current density according to claim 2 is characterized in that, on said plate body, the pitch-row in a plurality of holes between the adjacent holes reduces from an end to the other end of plate body gradually; And/or the aperture of a plurality of holes increases from an end to the other end of plate body gradually.
4. the netted insulcrete of inhomogeneous type is characterized in that, comprises the plate body, and is opened on the said plate body and a plurality of holes with inhomogeneous aperture and/or on-uniform porosity distance.
5. the netted insulcrete of inhomogeneous type according to claim 4 is characterized in that, on said plate body, the pitch-row of adjacent holes in a plurality of holes reduces from an end to the other end of plate body gradually; And/or the aperture of a plurality of holes increases from an end to the other end of plate body gradually.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502708A (en) * | 2014-11-05 | 2015-04-08 | 贝兹维仪器(苏州)有限公司 | Electrical network electrode resistivity measurer |
| CN113611548A (en) * | 2021-08-04 | 2021-11-05 | 广东联盈控电子科技有限公司 | Current shielding plate, forming device for forming foil and forming method |
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| CN202658248U (en) * | 2012-07-06 | 2013-01-09 | 新疆西部宏远电子有限公司 | Net-shaped insulation plate for electrode foil formation |
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| JPS6364395A (en) * | 1986-09-04 | 1988-03-22 | 富士通株式会社 | Plating system for printed board |
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| CN104502708A (en) * | 2014-11-05 | 2015-04-08 | 贝兹维仪器(苏州)有限公司 | Electrical network electrode resistivity measurer |
| CN113611548A (en) * | 2021-08-04 | 2021-11-05 | 广东联盈控电子科技有限公司 | Current shielding plate, forming device for forming foil and forming method |
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Application publication date: 20121024 |