CN102891280A - Preparation method for high-capacity lithium manganese battery positive plate - Google Patents
Preparation method for high-capacity lithium manganese battery positive plate Download PDFInfo
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- CN102891280A CN102891280A CN2012103781831A CN201210378183A CN102891280A CN 102891280 A CN102891280 A CN 102891280A CN 2012103781831 A CN2012103781831 A CN 2012103781831A CN 201210378183 A CN201210378183 A CN 201210378183A CN 102891280 A CN102891280 A CN 102891280A
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Abstract
The invention relates to a preparation method for a high-capacity lithium manganese battery positive plate. The method is characterized by comprising the following preparation processes: selecting foamed materials as a positive electrode collector; welding a positive guide lug closely to one side of the collector; mixing manganese dioxide, PVDF (Polyvinylidene Fluoride), acetylene black and graphite and then adding into an NMP (N-methyl-pyrrolidone) solution and stirring into a pasty positive mixture; coating the pasty positive mixture on the two faces of the positive electrode collector; and pressing the mixture is pressed after drying so as to form the high-capacity lithium manganese battery positive plate provided by the invention. According to the invention, three-dimensional materials with big aperture ratio are used as the positive electrode collector; the pasty positive mixture is coated on the two faces of the positive electrode collector so as to be pressed into a film positive plate; the discharge rate of the prepared battery can reach 0.4C; the capacity of a single battery can reach 500Ah; the single batteries are connected so as to form a battery pack; the high-capacity lithium manganese battery positive plate can be used as the high-power and high-energy large power battery pack for high-power large power equipment; a layer of diaphragm is coated on the positive plate so as to effectively prevent the battery damage caused by short-circuit positive and negative plate after the battery is formed; and the safety use of the battery is ensured.
Description
Technical field
The invention belongs to lithium series primary cell technical field, particularly relate to a kind of preparation method of large capacity positive pole of lithium manganese battery plate.
Lithium-manganese cell was at first succeeded in developing in Japan in 1975, had developed into the lithium battery that existing market is most widely used, output is maximum, was the battery kind that price is minimum, fail safe is best in the lithium series primary cell.Present known lithium-manganese cell is the primary cell of the charge types such as cylindrical, button, flexible package.Find that through retrieval Granted publication number is called the patent of invention of " high capacity cylindrical lithium-manganese cell structure and preparation method thereof " for CN101916879B, name, comprise that anodal battery core outer surface is enclosed with a barrier film, the lithium band is arranged between barrier film and box hat, the lid group is positioned at the upper end of box hat, anodal stem stem is positioned at the centre position of covering group, the metal intercell connector is connected with anodal stem stem, on the lid group liquid injection hole is arranged, be useful on the sealing nail of sealing liquid injection hole, the bottom in box hat is useful on the insulating trip with positive plate and the isolation of lithium band.Although the present invention has improved battery capacity, reduced material cost, but be difficult to satisfy capacity requires the large-sized power device more than 100Ah use.
Summary of the invention
The present invention provides a kind of preparation method that can make the cell heap(ed) capacity can reach the large capacity positive pole of lithium manganese battery plate of 500Ah for solving the technical problem that exists in the known technology.
The technical solution used in the present invention is:
The preparation method of large capacity positive pole of lithium manganese battery plate is characterized in: comprise following preparation process:
Select rectangular plate-like nickel foam or foamed aluminium as plus plate current-collecting body, weld anodal guide lug at plus plate current-collecting body one end near a side; Take by weighing 90.2wt% manganese dioxide, 1.6wt% polyvinylidene fluoride (PVDF), 6.3wt% acetylene black and 1.8wt% graphite, the solution that adds METHYLPYRROLIDONE (NMP) content 0.1wt% after mixing, stir formation pasty state cathode mix with mixer, cathode mix evenly is applied to the plus plate current-collecting body two sides, 130 ℃ of dry 24h～48h in drying box, with the compacting of the cathode mix above the plus plate current-collecting body, finish the large capacity positive pole of lithium manganese battery of the present invention plate after the taking-up.
The present invention can also adopt following technical measures:
Described positive plate is wrapped one deck barrier film, and again compacting forms rectangle coating positive plate, and the anodal guide lug of part is positioned at the outside of barrier film.
Described plus plate current-collecting body is that thickness is the nickel foam of 1.7mm; Described anodal guide lug is the thick nickel sheet of 0.1mm; Described barrier film is the thick PP film of 0.13mm; The thickness of described coating positive plate is 0.53mm.
Advantage and good effect that the present invention has are:
1, the present invention adopts the three-dimensional aluminium of large porosity or three-dimensional nickel as plus plate current-collecting body, be added with bonding agent, conductive agent and contain the pasty state manganese dioxide positive pole mixture that NMP forms in the plus plate current-collecting body two sided coatings and be pressed into slim positive plate, can make the battery discharge multiplying power reach 0.2C-0.4C, the cell capacity can reach 100Ah-500Ah; Cell is connected into battery pack, is applied in the high power large-sized power equipment as high power, high-octane large-sized power type battery pack.
2, the present invention adopts positive plate to wrap one deck barrier film, prevents from effectively forming that positive/negative plate damages because short circuit causes battery behind the battery, has guaranteed the safe handling of battery.
Embodiment
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and be described in detail as follows:
Select thickness be the nickel foam of 1.7mm as plus plate current-collecting body, at nickel foam one end near the thick nickel sheet of side welding 0.1mm as anodal guide lug; Taking by weighing particle diameter is that 400 purpose 90.2wt% manganese dioxide are as positive electrode, 1.6wt% polyvinylidene fluoride (PVDF) is as bonding agent, 6.3wt% acetylene black and 1.8wt% graphite are as conductive agent, the aqueous solution that adds METHYLPYRROLIDONE (NMP) content 0.1wt% after mixing, stir formation pasty state cathode mix with mixer, cathode mix evenly is applied to the plus plate current-collecting body two sides, part pasty state cathode mix is dipped in the nickel foam, 130 ℃ of dry 30h are pressed into 88mg/cm with the cathode mix above the nickel foam after the taking-up in drying box
2, make the large capacity positive pole of lithium manganese battery of the present invention plate.
Positive plate can also be wrapped the thick PP barrier film of one deck 0.13mm, being pressed into thickness is the rectangle coating positive plate of 0.53mm again, and the anodal guide lug that is positioned at the anode collection external body is positioned at the outside of barrier film.
Although the above is described the preferred embodiments of the present invention; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away from the scope situation that aim of the present invention and claim protect, can also make a lot of forms.These all belong within protection scope of the present invention.
Claims (3)
1. the preparation method of large capacity positive pole of lithium manganese battery plate is characterized in that: comprise following preparation process:
Select rectangular plate-like nickel foam or foamed aluminium as plus plate current-collecting body, weld anodal guide lug at plus plate current-collecting body one end near a side; Take by weighing 90.2wt% manganese dioxide, 1.6wt% polyvinylidene fluoride (PVDF), 6.3wt% acetylene black and 1.8wt% graphite, the solution that adds METHYLPYRROLIDONE (NMP) content 0.1wt% after mixing, stir formation pasty state cathode mix with mixer, cathode mix evenly is applied to the plus plate current-collecting body two sides, 130 ℃ of dry 24h～48h in drying box, with the compacting of the cathode mix above the plus plate current-collecting body, make the large capacity positive pole of lithium manganese battery of the present invention plate after the taking-up.
2. the preparation method of large capacity positive pole of lithium manganese battery plate according to claim 1, it is characterized in that: described positive plate is wrapped one deck barrier film, and again compacting forms rectangle coating positive plate, and the anodal guide lug of part is positioned at the outside of barrier film.
3. the preparation method of large capacity positive pole of lithium manganese battery plate according to claim 1 and 2, it is characterized in that: described plus plate current-collecting body is that thickness is the nickel foam of 1.7mm; Described anodal guide lug is the thick nickel sheet of 0.1mm; Described barrier film is the thick PP film of 0.13mm; The thickness of described coating positive plate is 0.53mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103781831A CN102891280A (en) | 2012-10-08 | 2012-10-08 | Preparation method for high-capacity lithium manganese battery positive plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103781831A CN102891280A (en) | 2012-10-08 | 2012-10-08 | Preparation method for high-capacity lithium manganese battery positive plate |
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| CN102891280A true CN102891280A (en) | 2013-01-23 |
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| CN2012103781831A Pending CN102891280A (en) | 2012-10-08 | 2012-10-08 | Preparation method for high-capacity lithium manganese battery positive plate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124428A (en) * | 2014-08-12 | 2014-10-29 | 宁波星锐能源科技有限公司 | Positive pole piece of winding lithium-manganese battery |
| CN111769255A (en) * | 2020-07-09 | 2020-10-13 | 四川虹微技术有限公司 | Positive pole piece for high-power lithium-manganese dioxide battery and preparation method thereof |
| WO2023102778A1 (en) * | 2021-12-08 | 2023-06-15 | Medtrum Technologies Inc. | Positive electrode plate for medical device battery and its preparation method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102683037A (en) * | 2012-05-10 | 2012-09-19 | 中国第一汽车股份有限公司 | Manganese dioxide asymmetric super capacitor and manufacturing method thereof |
-
2012
- 2012-10-08 CN CN2012103781831A patent/CN102891280A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102683037A (en) * | 2012-05-10 | 2012-09-19 | 中国第一汽车股份有限公司 | Manganese dioxide asymmetric super capacitor and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 丁志强等: "大功率锂锰一次电池正极基体研究", 《化学工程与装备》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124428A (en) * | 2014-08-12 | 2014-10-29 | 宁波星锐能源科技有限公司 | Positive pole piece of winding lithium-manganese battery |
| CN111769255A (en) * | 2020-07-09 | 2020-10-13 | 四川虹微技术有限公司 | Positive pole piece for high-power lithium-manganese dioxide battery and preparation method thereof |
| WO2023102778A1 (en) * | 2021-12-08 | 2023-06-15 | Medtrum Technologies Inc. | Positive electrode plate for medical device battery and its preparation method |
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Application publication date: 20130123 |