CN101290991B - Non-mercury alkaline button shape cell with alloy layer on cathode and preparing method of cathode lid - Google Patents
Non-mercury alkaline button shape cell with alloy layer on cathode and preparing method of cathode lid Download PDFInfo
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- CN101290991B CN101290991B CN200810106879.2A CN200810106879A CN101290991B CN 101290991 B CN101290991 B CN 101290991B CN 200810106879 A CN200810106879 A CN 200810106879A CN 101290991 B CN101290991 B CN 101290991B
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Abstract
The invention relates to a mercury-free alkaline button cell with a negative alloy layer and a method for making a negative cap. The internal surface of a metal negative cap of the button cell is coated with a layer of indium tin alloy, a negative calamine cream made by mixing zinc powder, metallic indium, metallic bismuth and aluminum powder is arranged between the negative cap and an insulating film; a manganese sheet is arranged between the insulating film and a positive shell body. The production process of the negative cap comprises conducting barrel plating with sodium stannate under a voltage of between 4 and 5 V for thirty minutes, cleaning, activation, secondary cleaning, plating tin with tin sulfate under a voltage of between 6 and 7 V for 5 to 10 minutes, cleaning, centrifugation and cleaning, packing the finished product on the same production line. The indium tin alloy layer coated on the internal surface of the negative cap insulates the negative calamine cream from a negative metal sheet so as to prevent gas expansion, thereby mercury which can pollute environment for preventing gas expansion. Environment-friendly innoxious indium, bismuth, aluminum, etc. are added in the negative calamine cream to replace noxious mercury, thereby meeting the mercury-free requirement of environment protection.
Description
Technical field
The present invention relates to a kind of button cell, particularly relate to a kind of mercury-free alkali button battery of the band negative pole alloy-layer that covers the indium stannum alloy layer at metal negative cover inner surface and the preparation method of negative cover thereof.
Background technology
At present general Alkaline Zinc/manganese button cell because of built-in " zinc " this raw material, must add mercury element, when preventing " zinc " with other raw materials or Metal Contact, produces gas and expands.But, tend to adopt the Alkaline Zinc/manganese cell of " not mercurous " on the market gradually along with environmental consciousness strengthens." AAA " type Alkaline Zinc/the manganese cell volume is bigger because of " AA " reaches, and has the space to hold the expansion that produces because of gas.But, because the volume ratio of " button type " Alkaline Zinc/manganese cell is less, in battery, can not there be vacant position to hold the expansion that gas causes again, so " button type " battery now still needs to add mercury, in order to avoid expand, make the cell shapes torsional deformation because of " zinc " produces gas with other raw materials or Metal Contact.Therefore, for environmental protection requirement, be badly in need of a kind of not mercurous button cell at present.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of mercury-free alkali button battery of the band negative pole alloy-layer that covers the indium stannum alloy layer at metal negative cover inner surface and the preparation method of negative cover thereof.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of mercury-free alkali button battery with the negative pole alloy-layer, comprise negative cover, negative zinc cream, positive plate and anodal housing, between negative cover and anodal housing, barrier film is housed, and configuration O-ring seal, make negative cover and anodal housing interference fit, anodal housing closing in seal bead; On metal negative cover inner surface, electroplate one deck indium stannum alloy layer, evenly mix the negative zinc cream of forming by zinc powder and indium metal, bismuth and aluminium powder and be arranged between negative cover and the barrier film; Be provided with positive plate between barrier film and the anodal housing, described positive plate is the manganese sheet.
Described negative zinc cream is evenly mixed with indium metal, bismuth and aluminium powder by zinc powder and forms, and is wherein not mercurous, comprises the following element of metering by weight;
Fe ＜3ppm
Pb ＜30ppm
In wt0.0150％-0.0450％
Bi wt0.0100％-0.0300％
Al 0.0020％-0.0050％。
The production technology of the negative cover of described band negative pole indium stannum alloy layer comprises:
1) negative cover is made in the sheet metal punching press, scrubbing again, degrease;
2) electrotinning;
3) method with barrel plating plates the layer of metal indium;
4) on same production line, carry out: adopted sodium stannate 4-5V barrel plating 30 minutes → clean up → activate → clean secondary → to plate at 6-7V and plated indium → cleaning → centrifugal drying → finished product packing in 5-10 minute with the STANNOUS SULPHATE CRYSTALLINE plating.
The invention has the beneficial effects as follows:
1) on the negative cover inner surface, plates the indium stannum alloy layer, isolated negative zinc cream and contacted, prevent the expansion that " zinc " is produced when directly contacting with the negative cover metal with the direct of negative plate metal.Like this, need not in the battery to add again that gas expands but the mercury of serious environment pollution reaches the environmental requirement of no mercury in order to prevent to produce.
2) on the raw material of traditional negative zinc cream and prescription, leave out mercury, adding indium, bismuth, aluminium etc. meet the metallic element of environment-protecting asepsis, replace poisonous mercury element, can improve negative pole zinc surface overpotential of hydrogen evolution, suppress the generation of hydrogen, improve battery leak resistance and electrical property.
Description of drawings
The structural representation of the present invention that Fig. 1 is.
Fig. 2 is the structural representation of the negative cover of inner surface plating indium stannum alloy layer.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Embodiment 1: a kind of mercury-free alkali button battery with the negative pole alloy-layer, comprise negative cover 1, negative zinc cream 3, positive plate 6 and anodal housing 7, between negative cover 1 and anodal housing 7, barrier film 5 is housed, and configuration O-ring seal 4, make negative cover 1 and anodal housing 7 interference fit, anodal housing 7 closing in seal bead.On the inner surface of stainless steel negative cover 1, electroplate one deck indium stannum alloy layer, evenly mix the negative zinc cream of forming 3 by zinc powder and indium metal, bismuth and aluminium powder and be arranged between negative cover 1 and the barrier film 5; Be provided with positive plate 6 between barrier film 5 and the anodal housing 7; Described positive plate 6 is the manganese sheet.
Described negative zinc cream is evenly mixed with indium metal, bismuth and aluminium powder by zinc powder and forms, and is wherein not mercurous, comprises the following element of metering by weight;
Fe＜3ppm
Pb＜30ppm
In wt0.0150％-0.0450％
Bi wt0.0100％-0.0300％
Al 0.0020％-0.0050％。
Embodiment 2: a kind of preparation method of negative cover of the mercury-free alkali button battery with negative pole indium stannum alloy layer, and its production technology comprises:
1) the stainless steel substrates punching out is become negative cover 1, scrubbing again, degrease;
2) electrotinning;
3) method with barrel plating plates layer of metal tin;
4) on same production line, carry out: adopted sodium stannate 4-5V barrel plating 30 minutes → clean up → activate → clean secondary → to plate at 6-7V and plated indium → cleaning → centrifugal drying → finished product packing in 5-10 minute with the indium sulfate plating.
Entrust national testing agency that 23A of the present invention and 625A button cell are tested with atomic absorption spectrum, the result is as follows:
Table 1
Table 1 shows: the mercury content of 23A of the present invention and 625A button cell, cadmium content, lead content all are significantly less than the permissible value of 98/101/EEC about the standard code of button cell.
As follows with inductively coupled plasma spectrometer-mass spectrometer to the result that alkaline button cell of the present invention detects:
Table 2
| Test parameters | Result (mg/kg) (ppm) |
| Lead content | *32 |
| Cadmium content | Less than 2 |
| Mercury content | *0.5 |
Above result of the test proves that the mercury content of button cell of the present invention has only 0.5mg/kg (ppm), less than environmental protection standard setting 1mg/kg (1ppm), belongs to the mercury-free battery classification.
Claims (1)
1. preparation method with the negative cover of the mercury-free alkali button battery of negative pole alloy-layer, wherein said button cell comprises the metal negative cover (1) of plating inner surface one deck indium stannum alloy layer (2), by zinc powder and indium metal, bismuth and aluminium powder evenly mix the negative zinc cream (3) of composition, positive plate (6) and anodal housing (7), between metal negative cover (1) and anodal housing (7), barrier film (5) is housed, and configuration O-ring seal, make metal negative cover (1) and anodal housing (7) interference fit, anodal housing (7) closing in seal bead, negative zinc cream (3) is arranged between negative cover (1) and the barrier film (5), is provided with positive plate (6) between barrier film (5) and the anodal housing (7); It is characterized in that: the production technology of negative cover comprises:
1. the sheet metal punching press is made negative cover (1), scrubbing again, degrease;
2. on same production line, carry out: adopted sodium stannate 4-5V barrel plating 30 minutes → clean up → activate → clean secondary → to plate at 6-7V and plated indium → cleaning → centrifugal drying → finished product packing in 5-10 minute with the indium sulfate plating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810106879.2A CN101290991B (en) | 2008-05-29 | 2008-05-29 | Non-mercury alkaline button shape cell with alloy layer on cathode and preparing method of cathode lid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810106879.2A CN101290991B (en) | 2008-05-29 | 2008-05-29 | Non-mercury alkaline button shape cell with alloy layer on cathode and preparing method of cathode lid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101290991A CN101290991A (en) | 2008-10-22 |
| CN101290991B true CN101290991B (en) | 2010-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810106879.2A Expired - Fee Related CN101290991B (en) | 2008-05-29 | 2008-05-29 | Non-mercury alkaline button shape cell with alloy layer on cathode and preparing method of cathode lid |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110364645B (en) * | 2019-06-18 | 2022-10-18 | 深圳清华大学研究院 | Mercury-free button cell negative electrode cover material and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1713427A (en) * | 2004-06-23 | 2005-12-28 | 同和矿业株式会社 | Zinc alloy powder for alkaline cell and method for producing same |
| CN101075675A (en) * | 2006-05-18 | 2007-11-21 | 中南大学 | Mercury-free alkaline button cell and manufacturing method thereof |
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2008
- 2008-05-29 CN CN200810106879.2A patent/CN101290991B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1713427A (en) * | 2004-06-23 | 2005-12-28 | 同和矿业株式会社 | Zinc alloy powder for alkaline cell and method for producing same |
| CN101075675A (en) * | 2006-05-18 | 2007-11-21 | 中南大学 | Mercury-free alkaline button cell and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| JP平8-31428A 1996.02.02 |
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| CN101290991A (en) | 2008-10-22 |
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Granted publication date: 20100609 Termination date: 20110529 |