CN1543004A - Secondary cell, negative plate of negative plate and method for manufacturing same - Google Patents
Secondary cell, negative plate of negative plate and method for manufacturing same Download PDFInfo
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- CN1543004A CN1543004A CNA03125053XA CN03125053A CN1543004A CN 1543004 A CN1543004 A CN 1543004A CN A03125053X A CNA03125053X A CN A03125053XA CN 03125053 A CN03125053 A CN 03125053A CN 1543004 A CN1543004 A CN 1543004A
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- Prior art keywords
- pole plate
- active material
- pole
- collector body
- battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Cell Electrode Carriers And Collectors (AREA)
Abstract
This invention relates to a secondary cell, its negative plate and its manufacturing method. The method is to make the negative charge level density on a certain length of the negative plate (10%-120% that of the perimeter of the inside wall of the cell case) 40%-90% of that on the rest part of the negative plate to increase the cell capacitance, reduce material cost and reduce the weight.
Description
Technical field the present invention relates to the negative plate and the manufacture method thereof of secondary cell, secondary cell.
Background technology rechargeable battery (also claiming secondary cell) is used aspect industrial goods, civil goods and is extensive and universal.As cordless telephone, mobile phone, laptop computer, electric tool etc.Further improve secondary battery capacity (in the fixed volume), reduce its weight.The consumption that reduces active material is eternal requirement.For satisfying this requirement, mainly be to realize by improving modes such as active material specific capacity, density, geometric shape in the past.These methods are undoubtedly Chang Youxiao and fill.The new approaches that the present invention then provides another to be different from said method realize above-mentioned purpose.
Summary of the invention the present invention improves existing secondary cell technology, proposes secondary cell of the present invention, the pole plate of secondary cell and manufacturing technology thereof.Technical scheme of the present invention specifically is described below:
Secondary cell of the present invention is made of positive pole, negative pole, diaphragm paper and housing, and wherein the battery cathode tail length is that the active material adhesion amount of that a part of pole plate of L is α a times of all the other part active material adhesion amounts of this negative plate.Described L value is 10%～120% of a battery case girth, preferably 85%～95%.Described α value satisfies: 0.4＜α＜0.90, that more excellent is 0.45＜α＜0.7.
Described battery case is any in circular, square, the ellipse.It can also be the variation on these basic configuration bases.
Secondary cell of the present invention comprises nickel separation cell, Ni-MH battery, lithium ion battery, lithium polymer battery, nickel-zinc cell.In addition, all pole pieces are formed every reeling with diaphragm paper by both positive and negative polarity, pole piece outermost one circle is the battery of negative pole (being covered its part by the part diaphragm paper sometimes), all is suitable for the present invention.
The secondary battery cathode pole plate that the present invention proposes is made of the collector body of double as carrier and the active material that is attached on the collector body, and these active materials usually comprise some auxiliary material that are used to improve some performance of battery.Wherein, that of negative plate afterbody one end length L partly active material surface density (weight on the unit are) be all the other α times of active material surface densities partly of this pole plate.Described length L value is 10%～120% of a battery case girth, preferably 85%～95%.Described α satisfies: 0.4＜α＜0.90, more excellent is 0.45＜α＜0.7.Described battery case is a kind of in circular, square, the ellipse.It can also be the variation on these basic configuration bases.In the secondary battery cathode pole plate proposed by the invention, described secondary cell comprises nickel-cadmium cell, Ni-MH battery, lithium ion battery, lithium polymer battery, nickel-zinc cell.In addition, all pole pieces are formed every reeling with diaphragm paper by both positive and negative polarity, pole piece outermost one circle be negative pole bad sometimes partly diaphragm paper cover its some) battery, all be suitable for the present invention.
In the secondary battery cathode pole plate proposed by the invention, when collector body was banded collector body, active material was asymmetric distribution in the collector body both sides on that part pole plate of pole plate afterbody one end (length is L).Wherein, in battery on the side relative with positive pole the active material abundance identical; The afterbody (length is L) that the active material abundance is less than this pole plate on the side of chamber wall in battery is single face active material abundance on partly the pole plate in addition.For netted collector body, pole plate afterbody one end length be L that partly on pole plate active material are asymmetric distributions in the pole plate both sides, its that side active material towards positive pole distributes more than its that side active material abundance towards the battery case wall.
For netted collector body, pole plate afterbody one end length be L that partly on pole plate active material also can be symmetrical distribution in the pole plate both sides.
Banded collector body of the present invention comprises perforated metal band, metal forming, not perforated metal band, perforation burr metal tape.These collector bodies are common perforation nickel plated steel strip, Copper Foil, perforation burr nickel plated steel strip etc.
Netted collector body of the present invention comprises the foam-like collector body, cut draw in the net collector body, tiltedly draw in the net collector body.As nickel foam, cut and draw copper mesh (also claim tiltedly draw copper mesh), tiltedly draw stainless (steel) wire etc.
The present invention also proposes the manufacture method of secondary battery cathode pole plate, and is dry then on the collector body of active material slurry (often containing some auxilliary rib compositions) attached to the double as carrier, is shaped, and comprises shaping in case of necessity.The feature of its technology different from the past is, at the pole plate shaping stage, is that partly active material layer removal of pole plate one side of L with pole plate afterbody one end length.Described with pole plate afterbody one end length be L that partly pole plate remove at the active material layer of face and comprise whole removals and partly remove.The method of removing described active material layer comprises scrapes division and eradicant eating.
The present invention also proposes a kind of manufacture method of secondary battery cathode pole plate, with on the collection sheet of active material slurry (usually containing some auxiliary compositions) attached to the double as carrier (be called and be coated with slurry process), dry then, shaping, comprise shaping in case of necessity, it is characterized in that be coated with slurry process by with pasting mould (also claiming scraper) on one side the edge of a knife be designed to step to make negative pole afterbody one end length be that the active material of one side of that some of L is by partly or all scrape off.Described pole plate afterbody one end length L value is 10%～120% of a battery case girth, preferably 85%～95%.
Except that the manufacture method of above-mentioned two kinds of negative plates, the present invention also proposes a kind of manufacture method of secondary battery cathode pole plate, it is characterized in that being coated with slurry process, by pasting mould (also claiming scraper) the both sides edge of a knife is designed to step shape, making negative plate afterbody one end length is that the active material on that a part of two sides of L is scraped off.Described pole plate afterbody one end length L value is 10%～120% of a battery case girth, preferably 85%～95%.
Embodiment
Embodiment 1
With 90 parts of ball-shape nickel hydroxides, 10 parts of hydroxide cobalts are with 20 parts of 2%CMC solution, suitable quantity of water is mixed into anode sizing agent, is coated on the nickel foam collector body, and 80 ℃ are dried by the fire half an hour, be calendered to the thickness about 0.6mm, be cut into the 40*85mm size, obtain the AA battery anode slice.Again with 90 parts of hydrogen storing alloy powders, 10 parts of nickel powders, 5%PTFE, suitable quantity of water is coated on the perforation nickel plated steel strip matrix after mixing pulping, and after the oven dry, it is thick to be depressed into 0.3mm, cuts into the 42*120mm size.To scrape from the negative pole material that an end is counted on that section pole piece that length L is 40mm one side then, promptly obtain negative plate of the present invention.
Top positive pole, negative pole and diaphragm paper are wound into Battery Pole Core by common assembly method.During coiling, that end that negative pole is scraped punishment in advance is as afterbody, and behind the coiling, this part is positioned at the outmost turns of pole piece, and this part is scraped off the internal face of the side of material to battery case.The pole piece of having reeled is inserted in the AA battery steel shell, slot rolling, fluid injection, adds sealing ring and seal, promptly obtain secondary cell of the present invention.
Embodiment 2
Negative plate is section earlier, will scrape from the negative pole material that an end is counted one side on that section pole piece that length L is 40mm then, and it is thick to be depressed into about 0.3mm again, and all the other are identical with embodiment 1.
Embodiment 3
Negative pole charging is coated in copper tiltedly draws in the net to be cut into 42*120mm after the drying on the collector body, will scrape off a part from the negative pole material that an end is counted one side on that section pole piece that length L is 40mm, the negative pole material that scrapes off heavily account for this section negative pole material heavy about 20%.All the other are with embodiment 2
Embodiment 4
Except will scraping off a part from the negative pole material equivalent that an end is counted two sides on that section pole piece that length L is 40mm, the negative pole material that scrapes off heavily account for this section negative pole material heavy about 30%, all the other are with embodiment 3.
Embodiment 5
When cathode size is coated on the perforation nickel plated steel strip matrix, the edge of a knife that will apply one side of mould (also being scraper) is designed to one-level step (promptly this edge of a knife face is that two parallel surfaces and a vertical plane constitute), makes the slit between the edge of a knife that two different width be arranged.Less gap length is 40mm, and this slit can partly or entirely scrape off the slurry of steel band one side.The section of oven dry back, the one side that can obtain an end (length is 40mm) is partly or entirely scraped off the negative plate of negative pole material.All the other are with embodiment 2.
By the technical scheme that the present invention proposes, can save the inside battery space effectively, reduce the active material consumption, thereby can improve the empty amount of battery, reduce battery weight and active material consumption, thereby realize purpose of the present invention.
Claims (13)
1, a kind of secondary cell is made of positive pole, negative pole, diaphragm paper and housing, it is characterized in that the battery cathode tail length be L that a part of pole plate the active material adhesion amount for this negative plate all the other partly the active material adhesion amounts α doubly.
2, secondary cell as claimed in claim 1 is characterized in that described L value is 10%～120% of a battery case girth, preferably 85%～95%.
3, as claim 1 and 2 described secondary cells, it is characterized in that described α value satisfies: 0.4＜α＜0.90, more excellent is 0.45＜α＜0.7.
4,, it is characterized in that described battery case is any in circular, square, the ellipse as claim 1 and 2 described secondary cells.
5, secondary cell as claimed in claim 1 is characterized in that described battery comprises nickel-cadmium cell, nickel metal hydride battery, lithium ion battery, lithium polymer battery, nickel-zinc cell.
6, a kind of negative plate of secondary cell, constitute by the collector body of double as carrier and the active material (comprising auxiliary material) that is attached on the collector body.That the active material surface density (weight on the unit are) partly that it is characterized in that described negative plate afterbody one end length L is α a times of all the other part active matter surface densities of this pole plate.
7, secondary battery cathode pole plate as claimed in claim 6 is characterized in that described length L value is 10%～120% of a battery case girth, preferably 85%～95%.
8, secondary battery cathode pole plate as claimed in claim 6, it is characterized in that described α satisfies: 0.4＜α＜0.90, more excellent is 0.45＜α＜0.7.
As claim 6 and 8 described secondary battery cathode pole plates, it is characterized in that 9, active material is asymmetric distribution in the collector body both sides on that part pole plate of pole plate afterbody one end length L for banded collector body.Wherein, in battery on the side relative with positive pole the afterbody (length is L) of active material abundance and this pole plate in addition on partly the pole plate single face active material abundance identical; The afterbody (length is L) that the active material abundance is less than this pole plate on the side of chamber wall in battery is single face active material abundance on partly the pole plate in addition.
10 as claim 6 and 8 described secondary battery cathode pole plates, it is characterized in that for netted collector body, pole plate afterbody one end length be L that partly on pole plate active material are asymmetric distributions in the pole plate both sides, its towards that side active material abundance of positive pole more than its that side active material abundance towards the battery case wall.
11 as claim 6 and 8 described secondary battery cathode pole plates, it is characterized in that for netted collector body, pole plate afterbody one end length be L that partly on pole plate active material be symmetrical distribution in the pole plate both sides.
12 as claim 6 and 10 described secondary battery cathode pole plates, it is characterized in that described netted collector body comprise the foam-like collector body, cut draw in the net collector body, tiltedly draw in the net collector body.
The manufacture method of 13 1 kinds of secondary battery cathode pole plates, dry then on the collector body of active material slurry (often containing some auxiliary compositions) attached to the double as carrier, be shaped, comprise shaping in case of necessity.It is characterized in that, at the pole plate shaping stage, be that partly active material layer removal of pole plate one side of L with pole plate afterbody one end length.Described pole plate afterbody one end length L value is 10%～120% of a battery case girth, preferably 85%～95%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA03125053XA CN1543004A (en) | 2003-05-04 | 2003-05-04 | Secondary cell, negative plate of negative plate and method for manufacturing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA03125053XA CN1543004A (en) | 2003-05-04 | 2003-05-04 | Secondary cell, negative plate of negative plate and method for manufacturing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1543004A true CN1543004A (en) | 2004-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA03125053XA Pending CN1543004A (en) | 2003-05-04 | 2003-05-04 | Secondary cell, negative plate of negative plate and method for manufacturing same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100456553C (en) * | 2005-08-25 | 2009-01-28 | 松下电器产业株式会社 | Non-aqueous electrolyte secondary battery and battery pack using the same |
-
2003
- 2003-05-04 CN CNA03125053XA patent/CN1543004A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100456553C (en) * | 2005-08-25 | 2009-01-28 | 松下电器产业株式会社 | Non-aqueous electrolyte secondary battery and battery pack using the same |
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