CN101552335B - Method for manufacturing battery negative pole piece - Google Patents
Method for manufacturing battery negative pole piece Download PDFInfo
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- CN101552335B CN101552335B CN2009101072025A CN200910107202A CN101552335B CN 101552335 B CN101552335 B CN 101552335B CN 2009101072025 A CN2009101072025 A CN 2009101072025A CN 200910107202 A CN200910107202 A CN 200910107202A CN 101552335 B CN101552335 B CN 101552335B
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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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Abstract
The invention discloses a method for manufacturing battery negative pole piece, including drying and rolling, which is characterized in that the sizing before drying and rolling is continuous sizing, and adopting one-sided sizing at the no-powdering part of the cathode pole piece contacted to the steel shell. Compared with the prior art, the invention has beneficial effects that the inventive method adopts using steel belt matrix to position at the center of the smear paste die clearance, performs powder scraping continuous operation before pole piece rolling, which is in favor of reducing alloy oxidation of pole piece in the production process and impurity introduction in the pole piece, and is in favor of improving the consistency of pole piece production quality and production efficiency of the pole piece.
Description
Technical field
The present invention relates to battery and make, particularly relate to a kind of manufacture method of battery cathode sheet.
Background technology
Existing small cylinder shape Ni-MH battery, the mode that general employing is reeled is with positive pole, negative pole and the barrier film in the middle of both positive and negative polarity is stacked at interval, is wound into the column type utmost point then and is assembled into the cylindrical battery shell, and interpolation electrolyte is finished making with cell sealing.Battery safety valve connects positive plate as the anode end, and battery steel shell contact negative pole outermost one circle is as the battery cathode end.Its positive active material is a spherical hickelous nydroxide, and the general foaming nickel that adopts is as conducting base, and the mode that employing pasting or dry powder embedding are oozed is suppressed and formed; And the active material of negative pole is a hydrogen-storage alloy powder, adopts punching nickel plated steel strip, nickel plating tiltedly to draw die-cut steel mesh or copper mesh as conducting base, adopts mode that pasting or dry powder embedding are oozed to suppress equally and forms.Because the reaction of battery plus-negative plate is a liquid-solid interfacial reaction, ion is that distance or the minimum resistance with minimum transmits between both positive and negative polarity, if not being positive corresponding corresponding negative or positive electrodes, negative pole or certain anodal one side do not participate in reaction, the battery cathode last lap is near the one side of box hat, and its active material utilization is lower." drum like alkaline accumulator " of " drum like alkaline accumulator " of Chinese patent CN1297031C bulletin, CN1301564C bulletin, and " alkaline secondary cell " of CN2570999Y bulletin respectively to improving utilance low improve of the non-front of battery cathode in the face of anodal part, but CN1297031C and CN1301564C not have proposition how to realize the starching amount be the negative plate counterpart the whole active matter qualities of negative pole 75～100%; And there is following problem in the alkaline secondary cell of CN2570999Y when being applied to the ni-mh steel band and scraping the negative plate of slurry and make:
1) negative plate cuts into the pole piece of specification after starching, drying, roll-in, and again that the negative pole utilance is lower part is scraped powder.After negative plate was through oven dry, roll-in, the density of pole piece was at this time scraped powder at 6.0～6.5g/cm3, it is very high that the temperature of pole piece can rise, alloyed powder can be oxidized, influences the hydrogen storage ability of alloyed powder, and combination properties such as the interior pressure of battery, life-span all can reduce.And under temperature rises situation about not controlling, even can cause alloyed powder to catch fire;
2) when not being in whole slurries central, scrapes the steel strip substrate in the negative plate powder, easily steel band is scratched, also can in pole piece, introduce impurity, even cause negative plate to scrap, even just scrape the steel band top layer, also destroy steel band nickel plating protective layer easily, the oxidation balance current potential of iron in alkaline solution is-0.877V when negative plate does not have electricity, can not produce the current potential protection, the easy oxidation of iron can influence the conductivity that contacts with box hat;
3) adopt single pole piece to scrape powder and make, can influence consistency and pole piece make efficiency that pole piece is made quality.
Summary of the invention
Technical problem to be solved by this invention is to remedy above-mentioned the deficiencies in the prior art, proposes a kind ofly to adopt continuous starching and do not go up the battery cathode sheet manufacture method that powder is partly taked back starching what negative plate contacted with box hat.
Technical problem of the present invention is solved by the following technical solutions:
The manufacture method of this battery cathode sheet comprises oven dry, roll-in.
The characteristics of the manufacture method of this battery cathode sheet are:
Starching before described oven dry, roll-in is continuous starching, and partly takes back starching at the powder of not going up that negative plate contacts with box hat.
Technical problem of the present invention adopts following further technical scheme to be solved:
Described continuous starching is adopted and is scraped the slurry mould, the described slurry mould of scraping is arranged on the hopper middle upper part that slurry is housed, be provided with fixedly two axis of guides of steel band in the described hopper, the described axis of guide is 5～15mm place under pulp surface, steel band is passed the axis of guide to be entered hopper and scrapes the slurry moulding, the axis of guide makes steel band be in the middle of pole piece and locates, to reduce pole piece generation irregular deformation; The described edge of a knife one end of scraping the slurry mould is the structure of variable-width and thickness, width is set to 50～60% of battery pole piece design thickness, it is back starching negative pole section that steel band is scraped after the slurry moulding at an end of pole piece Width, its thickness is that the other end is 50～60% of starching negative pole section, a two sides thickness, and described back starching negative pole section is used to make the negative plate of back near the box hat inwall of reeling.
The described width of slurry mould of scraping is by the starching amount decision that meets technological design.
Roll squeezer is adopted in described roll-in, its top roll is the whole section cylinder roller that diameter is identical, lower roll is two sections round platform rollers that diameter is different, one section roll-in two sides starching negative pole section that diameter is little, one section roll-in back starching negative pole section that diameter is big, described two sides starching negative pole section is identical with the roller pressure ratio that back starching negative pole section is subjected to, and pole piece density is identical, be enough to avoid pole piece that irregular deformation takes place after roll-in, keep pole piece smooth.
Described pole piece density is 6.20～6.50g/cm
3
The shoulder height of described roll squeezer lower roll round platform is by the thickness difference decision of starching negative pole section, two sides and back starching negative pole section.
The shoulder height of described roll squeezer lower roll round platform be starching negative pole section, two sides and back starching negative pole section thickness difference 30～60%.
The beneficial effect that the present invention is compared with the prior art is:
The inventive method adopts steel strip substrate in scraping slurry die clearance interfix, before the pole piece roll-in, scrape powder serialization operation, help reducing in the pole piece manufacturing process alloy generation oxidation and in pole piece, introduce impurity, help improving consistency and the pole piece make efficiency that pole piece is made quality.Partly do not have under the situation of active material at the tail circle of negative plate by the box hat inwall, the cycle life of battery does not only shorten, and prolongs to some extent on the contrary.Because it is big that the remaining space of inside battery becomes, help when anodal and negative pole expand, reducing compression to barrier film, help barrier film and protect liquid and reduce negative alloy powder, and in anodal and barrier film energy overabsorption electrolyte, thereby the prolongation battery cycle life.
Description of drawings
Fig. 1 is the position view of negative pole in battery of the specific embodiment of the invention;
Fig. 2 is the negative plate schematic diagram that the specific embodiment of the invention is made continuously;
Fig. 3 is that scraping of the specific embodiment of the invention starched the mould structure schematic diagram;
Fig. 4 is the roll squeezer pair roller structural representation of the specific embodiment of the invention.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the invention will be further described.
A kind of AA type Ni-MH battery as shown in Figure 1, the roll set place is provided with the micromesentery 1 that anti-burr causes short circuit, positive pole 2, barrier film 3, negative pole 4 mutual stacked coilings, negative pole 4 last laps are by the one side of box hat 5.
The manufacture method of positive plate, comprise 93 parts of commercial ball-shape nickel hydroxides, 5 parts, 2 parts additives of cobalt protoxide, with 3 parts of the CMC aqueous solution and PTFE aqueous solution as binding agent, be made into anode sizing agent, be filled into then in the foaming nickel, drying, roll-in, cut into 90mm * 43mm * 0.70mm, containing the active material total amount in the positive pole is 8.0g.
The manufacture method of negative plate comprises preparation slurry, starching continuously, cuts, dries and roll-in.
The preparation slurry is with commercial AB5 hydrogen-storage alloy, and wherein A is La, Ce, Pu, Ru, and B is Ni, Co, Mn, Al element, with the CMC aqueous solution, makes cathode size.
Starching is the nickel plated steel strip surface that as follows cathode size of making is applied to as matrix continuously, make and be of a size of 85mm * 0.33mm negative plate, the length of starching negative pole section, two sides 13 as shown in Figure 2 is that 85mm, thickness are 0.33mm, the not starching that contacts with box hat partly is that the length of back starching negative pole section 12 is that 40mm, thickness are 0.20mm, cut into highly to be the standard pole piece of 43mm, the active material total amount in the negative plate is 8.4g again.
Continuously starching adopt as shown in Figure 3 scrape slurry mould 6, scrape slurry mould 6 and be arranged on hopper 7 middle upper parts that slurry is housed, be provided with fixedly two axis of guides 8 of steel band in the hopper 7, the axis of guide 8 is the 10mm place under pulp surface, steel band is passed the axis of guide 8 to be entered hopper 7 and scrapes the slurry moulding, the axis of guide 8 makes steel band be in the middle of pole piece and locates, to reduce pole piece generation irregular deformation; The edge of a knife one end of scraping slurry mould 6 is the structure of variable-width and thickness, width is set to 50～60% of battery pole piece design thickness, it is back starching negative pole section 12 that steel band is scraped after the slurry moulding at an end of pole piece Width, its thickness is that the other end is 50～60% of starching negative pole section, two sides 13 thickness, and back starching negative pole section 12 is used to make the negative plate of back near the box hat inwall of reeling.The width of scraping slurry mould 6 is by the starching amount decision that meets technological design.
Through scraping pole piece that slurry handles temperature be 80-150 ℃ dry 8 minutes down.
Pole piece through dried is carried out roll-in, adopt roll squeezer as shown in Figure 4, the top roll 9 of roll squeezer is the whole section cylinder roller that diameter is identical, lower roll 10 be about two sections round platform rollers that diameter is different, one section roll-in two sides starching negative pole section 13 that diameter is little, one section roll-in back starching negative pole section 12 that diameter is big, the shoulder height 11 of lower roll 10 round platforms is by the thickness difference decision of starching negative pole section, two sides 13 with back starching negative pole section 12, it is 30～60% of thickness difference, starching negative pole section, two sides 13 is identical with the roller pressure ratio that back starching negative pole section 12 is subjected to, and pole piece density is 6.20～6.50g/cm
3, be enough to avoid pole piece that irregular deformation takes place after roll-in, keep pole piece smooth.
The manufacture method of battery, be included in the positive plate of made and negative plate therebetween every polyolefin nonwoven fabrics barrier film through hydrophilic treated, one section of thinner thickness is that back starching negative pole section 12 is towards radial outside, not starching partly contacted box hat after it was reeled, be wound into helical form then, be made into battery utmost point group, again the utmost point is assembled in the circular box hat of AA size, inject ternary or the binary electrolyte of LiOH, NaOH, KOH, seal the Ni-MH battery of making AA2000 at last.
The positive plate of control group is made identical with above-mentioned embodiment, the manufacturing materials of negative plate is also identical with above-mentioned embodiment with prescription, difference is to adopt the conventional slurry mode of scraping continuously, cathode size is coated on punching nickel plated steel strip two sides, through super-dry, roll-in, cut into the negative plate of 125mm * 43mm * 0.32mm, the active material total amount in the negative pole is: 10.0g.Battery is made with above-mentioned embodiment also basic identical, and difference only is to distinguish the two sides of negative plate, and the coiling front and back end also needn't be distinguished.
The cell evaluation that battery that embodiment is made and control group are made is as follows:
(1) mensuration of 0.2C capacity
According to the regulation of IEC61951:2003, under the situation of 20 ± 5 ℃ of ambient temperatures, battery was with the current charges that is equivalent to 0.1C 16 hours, afterwards, battery was shelved 1～4 hour, was 1.0V with current discharge to the voltage that is equivalent to 0.2C then, measured the capacity of battery.
(2) mensuration of cycle life
Under the situation of 20 ± 5 ℃ of ambient temperatures, with the electric current that is equivalent to 1C battery is charged, with the voltage drop 5mV control of charging, shelved afterwards 1 hour, with the current discharge that is equivalent to 1C to 1.0V, as a circulation, when capacity attenuation to initial capacity 60% the time by circulation, measure the number of times that discharges and recharges that can take place.
Measurement result sees the following form:
| Battery capacity (mAh) | Cycle life (number of times) | |
| Embodiment | 2080 | 330 |
| Control group | 2050 | 310 |
Described cycle life is rechargeable battery to be carried out repeated charge under certain condition, when battery performances such as capacity reach the number of times that discharges and recharges that the requirement of regulation can take place when following.
As seen from the above table, do not have under the situation of active material in the thick circle part of negative plate by the box hat inwall, the cycle life of battery does not only shorten, and prolongs to some extent on the contrary.Because it is big that the remaining space of inside battery becomes, help when anodal and negative pole expand, reducing compression to barrier film, help barrier film and protect liquid and reduce negative alloy powder, and in anodal and barrier film energy overabsorption electrolyte, thereby the prolongation battery cycle life.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, make some being equal to without departing from the inventive concept of the premise to substitute or obvious modification, and performance or purposes are identical, all should be considered as belonging to protection scope of the present invention.
Claims (7)
1. the manufacture method of a battery cathode sheet comprises oven dry, roll-in, it is characterized in that:
Starching before described oven dry, roll-in is continuous starching, and partly takes back starching at the powder of not going up that negative plate contacts with box hat;
Described continuous starching is adopted and is scraped the slurry mould;
The described slurry mould of scraping is arranged on the hopper middle upper part that slurry is housed, be provided with fixedly two axis of guides of steel band in the described hopper, the described axis of guide is 5～15mm place under pulp surface, steel band is passed the axis of guide enters hopper and scrape the slurry moulding, the axis of guide make steel band be in pole piece in the middle of the place;
Roll squeezer is adopted in described roll-in, and its top roll is the whole section cylinder roller that diameter is identical, and lower roll is two sections round platform rollers that diameter is different, one section roll-in two sides starching negative pole section that diameter is little, one section roll-in back starching negative pole section that diameter is big.
2. the manufacture method of battery cathode sheet as claimed in claim 1 is characterized in that:
The described edge of a knife one end of scraping the slurry mould is the structure of variable-width and thickness, width is set to 50～60% of battery pole piece design thickness, it is back starching negative pole section that steel band is scraped after the slurry moulding at an end of pole piece Width, and its thickness is that the other end is 50～60% of starching negative pole section, a two sides thickness.
3. the manufacture method of battery cathode sheet as claimed in claim 1 or 2 is characterized in that:
The described width of slurry mould of scraping is by the starching amount decision that meets technological design.
4. the manufacture method of battery cathode sheet as claimed in claim 3 is characterized in that:
Described two sides starching negative pole section is identical with the roller pressure ratio that back starching negative pole section is subjected to, and pole piece density is identical.
5. the manufacture method of battery cathode sheet as claimed in claim 4 is characterized in that:
Described pole piece density is 6.20～6.50g/cm
3
6. the manufacture method of battery cathode sheet as claimed in claim 5 is characterized in that:
The shoulder height of described roll squeezer lower roll round platform is by the thickness difference decision of starching negative pole section, two sides and back starching negative pole section.
7. the manufacture method of battery cathode sheet as claimed in claim 6 is characterized in that:
The shoulder height of described roll squeezer lower roll round platform be starching negative pole section, two sides and back starching negative pole section thickness difference 30～60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101072025A CN101552335B (en) | 2009-04-30 | 2009-04-30 | Method for manufacturing battery negative pole piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101072025A CN101552335B (en) | 2009-04-30 | 2009-04-30 | Method for manufacturing battery negative pole piece |
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| CN101552335A CN101552335A (en) | 2009-10-07 |
| CN101552335B true CN101552335B (en) | 2010-10-13 |
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| CN2009101072025A Active CN101552335B (en) | 2009-04-30 | 2009-04-30 | Method for manufacturing battery negative pole piece |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944607B (en) * | 2010-02-09 | 2012-12-12 | 湖南科力远新能源股份有限公司 | Preparation method of negative plate of chemical battery |
| CN101913510B (en) * | 2010-08-10 | 2012-11-28 | 珠海市光环自动化科技有限公司 | Secondary battery anode powdering full-automatic production line |
| CN104240963B (en) * | 2013-06-09 | 2017-05-17 | 胡连芝 | Electrochemical capacitor and manufacturing method of electrochemical capacitor |
| CN105591165A (en) * | 2015-12-30 | 2016-05-18 | 湖南格瑞普新能源有限公司 | Cylindrical nickel-metal hydride battery and negative pole wet-method powder scraping process |
| CN106848443A (en) * | 2017-01-09 | 2017-06-13 | 兰州金川科力远电池有限公司 | A kind of preparation method of high-capacity nickel-hydrogen battery |
| CN108461704A (en) * | 2018-02-27 | 2018-08-28 | 深圳市豪鹏科技有限公司 | A kind of secondary cell scrapes plain edge negative plate and makes mold |
| KR102013518B1 (en) * | 2018-04-02 | 2019-08-22 | (주)제이 앤 엘 테크 | Manufacturing System of Preform of Composite Biolar Plate for FuelCell |
| KR102541535B1 (en) * | 2018-10-25 | 2023-06-08 | 주식회사 엘지에너지솔루션 | Roll Press Apparatus Comprising Stepped Revision Member and Method for Pressing Using the Same |
| CN113871680A (en) * | 2020-06-30 | 2021-12-31 | 松山湖材料实验室 | Winding type battery and winding method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0710995A2 (en) * | 1994-11-07 | 1996-05-08 | Sumitomo Electric Industries, Ltd. | Electrode plate for battery and process for producing the same |
| US5727604A (en) * | 1994-07-28 | 1998-03-17 | Matsushita Electric Industrial Co., Ltd. | Apparatus for coating pasty mixture and method for coating the pasty mixture |
| CN1373527A (en) * | 2001-02-28 | 2002-10-09 | 三洋电机株式会社 | Method for mfg. electrode of alkaline cell |
-
2009
- 2009-04-30 CN CN2009101072025A patent/CN101552335B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5727604A (en) * | 1994-07-28 | 1998-03-17 | Matsushita Electric Industrial Co., Ltd. | Apparatus for coating pasty mixture and method for coating the pasty mixture |
| EP0710995A2 (en) * | 1994-11-07 | 1996-05-08 | Sumitomo Electric Industries, Ltd. | Electrode plate for battery and process for producing the same |
| CN1373527A (en) * | 2001-02-28 | 2002-10-09 | 三洋电机株式会社 | Method for mfg. electrode of alkaline cell |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平7-85869A 1995.03.31 |
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