CN100347883C - Manufacturing method of negative electrode plate of Ni-H cell - Google Patents
Manufacturing method of negative electrode plate of Ni-H cell Download PDFInfo
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- CN100347883C CN100347883C CNB2006100332801A CN200610033280A CN100347883C CN 100347883 C CN100347883 C CN 100347883C CN B2006100332801 A CNB2006100332801 A CN B2006100332801A CN 200610033280 A CN200610033280 A CN 200610033280A CN 100347883 C CN100347883 C CN 100347883C
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The present invention discloses a manufacturing method of materials of a negative electrode plate of a Ni-H battery. Cutting and drawing reticular current collector bands are used as the base materials of the electrode plate, firstly, active substance dry powder is filled in the meshes of the cutting and drawing reticular current collector bands. The present invention is characterized in that the following steps of agglomerant infiltration, drying, compaction, snaggletooth ablation and glue spreading are orderly carried out between a step of compaction and a step of plate cutting. The shape of the electrode plate of the battery can be improved by compacting and ablating snaggletooth again, the compacted density of the electrode plate can be improved, powder can not fall off, and the phenomena that after being wound, an electrode is in short circuit and finished batteries generate a low voltage are effectively avoided. The yield, the safety and the uniformity of the battery can be improved. The hollow rate of both sides of each of the current collector bandsis basically equal to the hollow rate of the middle of each of the current collector bands, the total amount of the filled powder is improved by 1 percent to 5 percent, the height of dendrite arms growing on burrs is smaller than the thickness of the used membrane, and the utilization rate of the negative electrode plate is improved by 2 percent to 6 percent; a positive electrode plate can be heightened by 0.5mm to 1.0mm correspondingly, the assembling coefficient of the battery is improved, the volumetric capacity of the Ni-H battery is increased, and comparead with the volumetric capacity of the ordinary Ni-H battery, the volumetric capacity of the Ni-H battery of the present invention can be increased by 3 percent to 9 percent.
Description
Technical field
The battery that the present invention relates to be used for directly to change chemical energy and be electric energy deposit active material manufacturing alkaline battery nickel hydroxide electrode with electrochemical method on carrier, especially relate to a kind of manufacture method of negative electrode plate of Ni-H cell.
Background technology
Ni-H cell is the high energy alkaline secondary cell of new generation after ickel-cadmium cell, has high power capacity, characteristics such as high-power, pollution-free, is one of important developing direction of current secondary cell.At present, AA type Ni-H cell capacity has reached 2500mAh, and 4/3A type Ni-H cell capacity has reached 4500mAh, and volumetric specific energy is more than the 400Wh/L, is 2.5 times of nickel-cadmium cell volumetric specific energy, near the level of present lithium ion battery.But, to draw in the net shape collector band be that the width of the negative plate flanging of base material is 2mm～5mm to existing Ni-H cell to cut, the empty rate at flanging place is littler by about 50% than other, the loading of the alloyed powder on pole piece both sides reduces, account for 5%～10% of whole pole piece, during for the making high-capacity battery, the loading of negative alloy powder will be badly influenced.And there is the broken teeth that is formed by the double-deck flanging of mesh in the pole piece dual-side, and the broken teeth width is generally 0.5mm～2.0mm, the broken teeth position can not the filler alloys powder, make battery capacity low, intensity is very easy in follow-up operating process by bending not as good as other position, easy shedding during coiling, easily short circuit is being wound into after battery activates, circulates, and alloyed powder can the part efflorescence, come off, make battery the low pressure phenomenon occur, broken teeth forms the burr that highly is generally 0.05mm～0.15mm.If the height of some dendrite arm growths is greater than the thickness of adapted barrier film on the burr, the phenomenon of both positive and negative polarity short circuit also can take place behind the coiling, make consistency, the fail safe of Ni-H cell become bad, particularly directly restricted the application of Ni-H cell and the further raising of capacity.
Summary of the invention
Technical problem to be solved by this invention is the defective that overcomes prior art, proposes a kind of manufacture method of negative electrode plate of Ni-H cell.
Technical problem of the present invention is solved by the following technical programs.
The manufacture method of this negative electrode plate of Ni-H cell, to draw in the net shape collector band be base material to pole piece to cut, comprise at first the active material dry mash being filled in to cut and draw in the net in the mesh of shape collector band, compacting then, also comprise last cut-parts, will cut into the pole piece finished product of the length that requires through the collector band of each step process.
The characteristics of the manufacture method of this negative electrode plate of Ni-H cell are: following steps are arranged between compacting and cut-parts step successively:
(1) binding agent is oozed in embedding, adopt binding agent to draw in the net shape collector band and soak into enriching cutting of active material dry mash in the mesh, promptly binding agent is oozed in embedding in the active material dry mash, prevents that the active material dry mash from coming off, with the stability of increase pole piece and the security performance of battery;
(2) oven dry is removed and is remained in the unnecessary binding agent of collector strip surface, dries under anti-oxidation condition then;
(3) compacting, the collector band compacting once more with oven dry is combined in the collector band mesh, with the compacted density of enhanced activity material dry mash the active material dry mash;
(4) excision broken teeth, the collector band dual-side of compacting is excised by the broken teeth that the double-deck flanging of mesh forms once more;
(5) gluing carries out the rolling type gluing in the collector strip surface of excision dual-side broken teeth, and is air-dry then, prevents that further the active material dry mash from coming off and the collector band exposes outside, and improves the fail safe of battery.
Described cutting drawn in the net shape collector band and comprised cutting and draw copper mesh shape collector band, cut and draw nickel-plated steel reticulated collectors band and Qie Layin reticulated collectors band.Describedly cut that to draw in the net be laterally to embark on journey at described collector band to cut out a plurality of otch, and vertically be pulled into rhombus, square or fan-shaped hole, the sheet material of incision periphery reverses the edge of pore-forming with tractive, and delegation's incision periphery part is over against the otch of its adjacent two row.
Described active material dry mash is the rare earth hydrogen-storage alloy powder, or by weight 100: (0.1～5) adds the rare earth hydrogen-storage alloy powder batch mixing of nickel powder, cobalt powder, acetylene black, powdered carbon or copper powder.
Described binding agent is a kind of or any two or more mixture of the polytetrafluoroethylene PTFE aqueous solution, the CMC CMC aqueous solution, the PVAC polyvinylalcohol aqueous solution, the styrene butadiene rubber sbr aqueous solution.
The binding agent that it is unnecessary that described removing remains in the collector strip surface is that the collector band is blown down the unnecessary binding agent in surface with 0.5 meter/minute～3 meters/minute speed by air blowing equipment.
The air pressure of described air blowing equipment is 1Mpa～4Mpa.
Described under anti-oxidation condition oven dry be, be oven dry 1 minute～4 minutes in 60 ℃～150 ℃ the baking oven being full of inert protective gas and temperature, oxidized to prevent active material.
The pressure of described compacting once more is at least 100 tons/square centimeter, make active material dry mash density reach 6.0 gram/cubic centimetres～8.0 gram/cubic centimetres, it is thinner that the collector band will become, more soft, and increased compacted density effectively, make not shedding of pole piece, prevent phenomenons such as short circuit, low pressure behind the coiling, improved battery capacity and rate of finished products.
Described excision broken teeth is to make the width difference of semi-finished product pole piece less than 0.2mm, and the empty rate of semi-finished product pole piece dual-side and middle part is basic identical, and it is basic identical and increase to some extent to fill out the powder amount, and makes burr height be lower than 0.04mm, less than the thickness of adapted barrier film half.Improve effectively battery consistency and security reliability.
Air-dry behind the described gluing is air-dry fast in 60 seconds.
The inventive method adopts compacting once more and excision broken teeth method to improve the battery pole piece shape, increased the pole piece compacted density, can shedding, prevented that effectively the low pressure phenomenon from appearring in the short circuit of coiling rear electrode, finished product battery, improved rate of finished products, fail safe and the consistency of battery.The empty rate of collector band dual-side and middle part is basic identical, fill out the powder total amount and improve 1%～5%, the height of some dendrite arms growth is also less than the thickness of adapted barrier film on the burr, the utilance of negative plate improves 2%～6%, and positive plate is corresponding can increase 0.5mm～1.0mm, has improved the assembling coefficient of battery, increased the capacity of Ni-H cell, generally improved 3%～9% than Ni-H cell.
Description of drawings
Below in conjunction with embodiment and contrast accompanying drawing the present invention is further described.
Accompanying drawing is the battery of the inventive method making and the interior pressure test curve figure of the same capacity Ni-H cell that existing method is made.
Embodiment:
A kind of capacity is the AA type Ni-H cell of 2400mAh, adopting thickness is that 0.30mm cuts and draws copper mesh shape collector band to fill the roll-in again of rare earth hydrogen-storage alloy powder, in the polyfluortetraethylene of binding element PTFE aqueous solution, soaked 1 second～60 seconds then, excise dual-side broken teeth gluing more again after oven dry, the secondary roll-in, cut into the pole piece finished product of the length that requires at last, use for being rolled into negative pole.
Adopt parallel gas blow pipe to blow down unnecessary binding agent on the collector band before the oven dry, the gap of air gun and collector band is 0.5cm～10.0cm, and the angle of parallel gas blow pipe and collector band is 1 °～45 °.
At least 100 tons/square centimeters of the pressure of secondary roll-in.
Battery and the physical parameter of the same capacity Ni-H cell that existing method is made and the difference of chemical property of the inventive method making are described with experimental data below.
The physical parameter test result sees Table 1:
Table 1
| Pole piece thickness | 0.315mm | 0.325mm |
| The pole piece width | 44.4mm～44.5mm | 44.3mm～45.1mm |
| The burr average height | 0.02mm | 0.08mm |
Electrochemical property test is after cell activation, adopts the BS9300 detecting box of Guangzhou electrical equipment research institute to carry out according to the requirement of IEC61951-2, GB/T15100-2003, and test result sees Table 2:
Table 2
After battery activated, the PSS-5B pressure sensing tester that adopts U.S. OMEGA ENGINEERING INC company to produce, battery were pressed test in carrying out with the 0.5C charging, and test result is seen accompanying drawing.A has interior the pressure and the time relation curve of battery charge that method is made now among the figure, and B is the interior pressure and the time relation curve of the battery charge of the inventive method making.
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, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of being submitted to.
Claims (10)
1. the manufacture method of a negative electrode plate of Ni-H cell, to draw in the net shape collector band be base material to pole piece to cut, comprise at first the active material dry mash being filled in to cut and draw in the net in the mesh of shape collector band, compacting then, also comprise last cut-parts, to cut into the pole piece finished product of the length that requires through the collector band of each step process, it is characterized in that:
Following steps are arranged between compacting and cut-parts step successively:
(1) soak into binding agent, adopt binding agent to draw in the net shape collector band and soak into enriching cutting of active material dry mash in the mesh, promptly binding agent is oozed in embedding in the active material dry mash:
(2) oven dry is removed and is remained in the unnecessary binding agent of collector strip surface, dries under anti-oxidation condition then;
(3) compacting is with the collector band compacting once more of oven dry;
(4) excision broken teeth is excised the collector band dual-side of compacting once more by the broken teeth that the double-deck flanging of mesh forms;
(5) gluing carries out the rolling type gluing in the collector strip surface of excision dual-side broken teeth, and is air-dry then.
2. the manufacture method of negative electrode plate of Ni-H cell as claimed in claim 1 is characterized in that:
Described cutting drawn in the net shape collector band and comprised cutting and draw copper mesh shape collector band, cut and draw nickel-plated steel reticulated collectors band and Qie Layin reticulated collectors band.
3. the manufacture method of negative electrode plate of Ni-H cell as claimed in claim 1 or 2 is characterized in that:
Described active material dry mash is the rare earth hydrogen-storage alloy powder, or by weight 100: (0.1～5) adds the rare earth hydrogen-storage alloy powder batch mixing of nickel powder, cobalt powder, acetylene black, powdered carbon or copper powder.
4. the manufacture method of negative electrode plate of Ni-H cell as claimed in claim 3 is characterized in that:
Described binding agent is a kind of or any two or more mixture of the polytetrafluoroethylene PTFE aqueous solution, the CMC CMC aqueous solution, the PVAC polyvinylalcohol aqueous solution, the styrene butadiene rubber sbr aqueous solution.
5. the manufacture method of negative electrode plate of Ni-H cell as claimed in claim 4 is characterized in that:
The binding agent that it is unnecessary that described removing remains in the collector strip surface is that the collector band is blown down the unnecessary binding agent in surface with 0.5 meter/minute～3 meters/minute speed by air blowing equipment.
6. the manufacture method of negative electrode plate of Ni-H cell as claimed in claim 5 is characterized in that:
The air pressure of described air blowing equipment is 1Mpa～4Mpa.
7. the manufacture method of negative electrode plate of Ni-H cell as claimed in claim 6 is characterized in that:
Described under anti-oxidation condition oven dry be to be oven dry 1 minute～4 minutes in 60 ℃～150 ℃ the baking oven being full of inert protective gas and temperature.
8. the manufacture method of negative electrode plate of Ni-H cell as claimed in claim 7 is characterized in that:
The pressure of described compacting once more is at least 100 tons/square centimeter, makes active material dry mash density reach 6.0 gram/cubic centimetres～8.0 gram/cubic centimetres.
9. the manufacture method of negative electrode plate of Ni-H cell as claimed in claim 8 is characterized in that:
Described excision broken teeth is, the width difference that makes the semi-finished product pole piece is less than 0.2mm, and makes burr height be lower than 0.04mm.
10. the manufacture method of negative electrode plate of Ni-H cell as claimed in claim 9 is characterized in that:
Air-dryly behind the described gluing be, air-dry fast in 60 seconds.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100332801A CN100347883C (en) | 2006-01-20 | 2006-01-20 | Manufacturing method of negative electrode plate of Ni-H cell |
| TW096108129A TW200838294A (en) | 2006-01-20 | 2007-03-09 | System and method to generate the interactive video images |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100332801A CN100347883C (en) | 2006-01-20 | 2006-01-20 | Manufacturing method of negative electrode plate of Ni-H cell |
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| Publication Number | Publication Date |
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| CN1805183A CN1805183A (en) | 2006-07-19 |
| CN100347883C true CN100347883C (en) | 2007-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100332801A Active CN100347883C (en) | 2006-01-20 | 2006-01-20 | Manufacturing method of negative electrode plate of Ni-H cell |
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| CN (1) | CN100347883C (en) |
| TW (1) | TW200838294A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101442114B (en) * | 2007-11-20 | 2010-11-17 | 比亚迪股份有限公司 | Preparation method for lithium ion battery pole piece |
| US20100203384A1 (en) * | 2009-01-27 | 2010-08-12 | G4 Synergetics, Inc. | Electrode folds for energy storage devices |
| CN102169983B (en) * | 2010-02-25 | 2015-04-22 | 深圳市比克电池有限公司 | Manufacturing method of lithium-ion battery and pressing method of graphite negative electrode piece of lithium-ion 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 |
| CN203733894U (en) | 2014-01-17 | 2014-07-23 | 宁德新能源科技有限公司 | Lithium ion battery |
| WO2017035749A1 (en) | 2015-08-31 | 2017-03-09 | 宁德新能源科技有限公司 | Secondary battery cell and winding formation system thereof |
| CN108336297B (en) * | 2017-12-29 | 2021-10-08 | 惠州市纬世新能源有限公司 | Preparation method of lithium ion battery pole piece |
| WO2019182150A1 (en) * | 2018-03-22 | 2019-09-26 | Tdk株式会社 | Negative electrode and lithium ion secondary battery |
| CN108461842B (en) * | 2018-04-09 | 2021-05-11 | 合肥国轩高科动力能源有限公司 | Method for improving short circuit passing rate of cylindrical lithium titanate energy storage battery cell |
| CN108923018A (en) * | 2018-06-12 | 2018-11-30 | 沈志刚 | A kind of method improving battery pole piece compacted density and gained battery pole piece and battery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5163974A (en) * | 1990-06-09 | 1992-11-17 | Deutsche Automobilgesellschaft Mbh | Process for manufacturing fiber structure plates for positive and negative electrodes |
| JPH0845500A (en) * | 1994-07-29 | 1996-02-16 | Sanyo Electric Co Ltd | Manufacture of electrode |
| CN1220498A (en) * | 1997-12-19 | 1999-06-23 | 王纪三 | Electrode of charging battery and method and equipment for making electrode |
| CN1274178A (en) * | 1999-05-14 | 2000-11-22 | 松下电器产业株式会社 | Method of mfg. electrode of battery |
-
2006
- 2006-01-20 CN CNB2006100332801A patent/CN100347883C/en active Active
-
2007
- 2007-03-09 TW TW096108129A patent/TW200838294A/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5163974A (en) * | 1990-06-09 | 1992-11-17 | Deutsche Automobilgesellschaft Mbh | Process for manufacturing fiber structure plates for positive and negative electrodes |
| JPH0845500A (en) * | 1994-07-29 | 1996-02-16 | Sanyo Electric Co Ltd | Manufacture of electrode |
| CN1220498A (en) * | 1997-12-19 | 1999-06-23 | 王纪三 | Electrode of charging battery and method and equipment for making electrode |
| CN1274178A (en) * | 1999-05-14 | 2000-11-22 | 松下电器产业株式会社 | Method of mfg. electrode of battery |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI339065B (en) | 2011-03-11 |
| CN1805183A (en) | 2006-07-19 |
| TW200838294A (en) | 2008-09-16 |
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Address after: 518111 Building 1, 68 Xinxia Avenue, Pinghu street, Longgang District, Shenzhen City, Guangdong Province Patentee after: Shenzhen haopeng Technology Co.,Ltd. Address before: Longgang District of Shenzhen City, Guangdong province 518111 Pinghu Shanxia Luoshan Industrial Zone A1, building A2 Patentee before: SHENZHEN HAOPENG TECHNOLOGY Co.,Ltd. |
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