CN110729457A - Method for manufacturing positive plate of nickel battery - Google Patents
Method for manufacturing positive plate of nickel battery Download PDFInfo
- Publication number
- CN110729457A CN110729457A CN201911003077.3A CN201911003077A CN110729457A CN 110729457 A CN110729457 A CN 110729457A CN 201911003077 A CN201911003077 A CN 201911003077A CN 110729457 A CN110729457 A CN 110729457A
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- Prior art keywords
- nickel
- pole piece
- positive electrode
- foamed nickel
- manufacturing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/24—Electrodes for alkaline accumulators
- H01M4/32—Nickel oxide or hydroxide electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/24—Electrodes for alkaline accumulators
- H01M4/26—Processes of manufacture
- H01M4/28—Precipitating active material on the carrier
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/24—Electrodes for alkaline accumulators
- H01M4/26—Processes of manufacture
- H01M4/30—Pressing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides a method for manufacturing a nickel battery positive plate, which comprises the steps of firstly immersing positive slurry into a first foamed nickel substrate, drying, scraping surface floating powder, and cutting to obtain a primary pole piece, secondly sequentially stacking a second foamed nickel substrate, at least one primary pole piece and a second foamed nickel substrate from bottom to top, integrally pressing and cutting to obtain the nickel battery positive plate, wherein the surface size of the second foamed nickel substrate is not less than the surface size of the primary pole piece. The method has simple, feasible and novel process, and the manufactured positive plate has higher capacity and better active substance adhesiveness.
Description
Technical Field
The invention relates to a method for manufacturing a positive plate of a nickel battery.
Background
The nickel battery is a traditional product, wherein the traditional manufacturing method of the positive plate generally has two types, one type is manufactured by powdering and rolling by adopting a dry-method embedding and infiltration technology, the mode has the advantages of convenient manufacture and convenient production, but has the defects that the pole piece which is rolled into the plate by the dry method is easy to fall off powder to influence the performance of the battery, and meanwhile, the method is limited by the rolling capability of equipment and the like and is difficult to manufacture thicker pole piece with higher capacity. The other method is to adopt a wet method to prepare the slurry pull sheet, the active substance mixture, the adhesive, the pure water and the like are mixed into slurry, and then the slurry is attached to a foam nickel matrix and then dried, rolled and cut into pieces so as to form the pole piece; compared with dry tabletting, the preparation difficulty is increased, but the powder falling condition is improved due to the binder in the pole piece. However, the positive electrode sheets manufactured by the two manufacturing methods are easy to fall off in a liquid-rich state, so that the performance of the battery is affected. In addition, in the conventional high-capacity battery, the amount of the active material is generally increased, but the effect is not preferable.
Disclosure of Invention
The invention aims to provide a method for manufacturing a nickel battery positive plate, which has the advantages of simple, feasible and novel process, higher capacity and better active substance adhesion.
The invention is realized by the following scheme:
a manufacturing method of a nickel battery positive plate comprises the steps of firstly immersing a first foamed nickel substrate into positive slurry, drying, scraping surface floating powder, cutting to obtain a primary plate, secondly sequentially stacking a second foamed nickel substrate, at least one primary plate and a second foamed nickel substrate from bottom to top (namely, two second foamed nickel substrates clamp at least one primary plate in the middle), pressing the two first foamed nickel substrates and the at least one primary plate integrally, and cutting to obtain the nickel battery positive plate, wherein the surface size of the second foamed nickel substrate is not smaller than that of the primary plate. In the invention, the surface size refers to the length and the width, and during actual manufacturing, the length and the width of the second foamed nickel substrate exceed the length and the width of the preliminary pole piece at the same time, or the length and the width of the second foamed nickel substrate exceed the length and the width of the preliminary pole piece and are equal to the width of the preliminary pole piece, or the length and the width of the second foamed nickel substrate exceed the length and the width of the preliminary pole piece. The thicknesses of the first foamed nickel matrix and the second foamed nickel matrix are selected to be 1.10-1.60 mm, and the PPI is selected to be 80-140.
Further, the positive electrode slurry is prepared from nickel-containing positive electrode mixed powder, 3% of CMC glue solution (namely 3% of sodium carboxymethyl cellulose glue solution), sodium polyacrylate, 60% of PTFE (namely 60% of polytetrafluoroethylene emulsion), pure water, styrene butadiene rubber and fibers in a mass ratio of 5-9: 0.5-1.5: 0.3-1.4: 0.05-0.1: 0.2-3: 0.05-0.2: 0.005-0.1, wherein the nickel-containing positive electrode mixed powder is cobalt-coated spherical nickel, yttrium oxide and cobaltous hydroxide according to the mass ratio of 9.2-9.98: 0.01-0.4: 0.01 to 0.4 by mixing.
Further, in the step i, a specific process of immersing the positive electrode slurry in the first foamed nickel matrix is as follows: the first foam nickel substrate is placed in the anode slurry to be soaked for a certain time, the soaking time can be controlled according to actual needs to ensure that the weight of the anode slurry soaked in the first foam nickel substrate meets the process requirements, and the soaking time can be controlled within 30-120 s generally according to multiple tests; rolling is carried out before cutting, and in the actual manufacturing process, the rolling step can be selected according to requirements.
Further, in the step ii, an adhesive tape is coated on the edge portion of the periphery of the product after cutting. In the actual manufacturing process, the periphery of the product (i.e. the edge part of the primary pole piece combined with the second foamed nickel substrate) can be rolled again before the cutting in the step ii, so that the periphery of the product is combined more firmly.
The manufacturing method of the nickel battery positive plate is simple, feasible and novel in process, and is formed by pressing a plurality of primary pole pieces and the upper and lower second foam nickel bases, so that the manufactured nickel battery positive plate is high in capacity, and the requirement of a high-capacity battery can be effectively met; the soaking process is adopted to fill the positive electrode slurry in the first foamed nickel matrix, and the mixed binder of sodium carboxymethylcellulose, sodium polyacrylate, styrene butadiene rubber and the like and the added fibers are adopted in the slurry, so that the adhesiveness of active substances in the first foamed nickel matrix is improved, and meanwhile, two second foamed nickel matrixes are attached to the outside of the primary pole piece, so that the prepared nickel battery positive plate is not easy to powder off in the process of preparing a battery, the capacity of the positive plate is ensured to be exerted, the capacity qualification rate is improved, and a high-capacity battery is prepared, thereby meeting the market of high-capacity batteries; meanwhile, the anode plate is not easy to remove powder, the short circuit and low voltage rate of the battery can be reduced, the electrical property and safety performance of the battery are improved, and the service life of the battery is prolonged.
Detailed Description
The present invention will be further described with reference to the following examples, but the present invention is not limited to the description of the examples.
Example 1
A manufacturing method of a nickel-metal hydride battery 20Ah positive plate comprises the following steps:
firstly, coating cobalt ball nickel, yttrium oxide and cobaltous hydroxide according to the mass ratio of 9.9: 0.02: 0.08 of the mixture is mixed to form nickel-containing anode mixed powder, and the nickel-containing anode mixed powder, sodium carboxymethyl cellulose, sodium polyacrylate, 60 percent of polytetrafluoroethylene emulsion, pure water, styrene butadiene rubber and fiber are mixed according to the mass ratio of 6.8: 0.85: 0.4: 0.05: 1.8: 0.05: 0.05, preparing to obtain positive electrode slurry, cutting a first foamed nickel substrate with the thickness of 1.35mm and the PPI of 140 according to the technological requirement, pressing a white edge as required, attaching an adhesive tape, then placing the treated first foamed nickel substrate in the positive electrode slurry, soaking for 30-120 s, taking out, drying, removing the adhesive tape on the first foamed nickel substrate, scraping surface floating powder, rolling to the technological requirement thickness, and cutting to obtain a primary pole piece;
II, cutting a second foamed nickel substrate with the thickness of 1.35mm and the PPI of 140 according to the length and the width which exceed the length and the width of the primary pole piece, then sequentially stacking the second foamed nickel substrate, the three primary pole pieces and the second foamed nickel substrate from bottom to top (namely the second foamed nickel substrate, the first primary pole piece, the second primary pole piece, the third primary pole piece and the second foamed nickel substrate are sequentially stacked from top to bottom, the three primary pole pieces are clamped between the two second foamed nickel substrates) and placing the two primary pole pieces on a die, pressing the two primary pole pieces into a whole by using a high-pressure hydraulic press, and rolling the periphery of the product (namely the edge part of the primary pole piece combined with the second foamed nickel substrate) again, the periphery of the product is combined more firmly, the product is cut, and the edge part of the periphery of the product is coated with the adhesive tape to prepare the nickel battery positive plate.
After the nickel-metal hydride battery 20Ah positive plate prepared by the method of example 1 was fabricated into a battery, 10 sample batteries were subjected to a capacity test (0.1C charging for 16 hours, standing for 30min, 0.2C discharging to 1.0V), and the results were sequentially as follows: 20236mAh, 21188mAh, 20502mAh, 20197mAh, 20916mAh, 21003mAh, 20630mAh, 20632mAh, 20627mAh and 20622mAh, the average capacity is 20655mAh, and the battery capacity meets the requirement.
Example 2
The steps of a method for manufacturing a positive plate of a nickel-metal hydride battery 15Ah are basically the same as those of the method for manufacturing the positive plate of the nickel-metal hydride battery 20Ah in the embodiment 1, and the difference is that:
1. in the step I, the cobalt-coated spherical nickel, the yttrium oxide and the cobaltous hydroxide are mixed according to the mass ratio of 9.4: 0.3: 0.3, mixing to form nickel-containing anode mixed powder, wherein the mass ratio of the nickel-containing anode mixed powder to the sodium carboxymethyl cellulose to the sodium polyacrylate to the 60 percent of polytetrafluoroethylene emulsion to the pure water to the styrene butadiene rubber to the fibers is 8: 0.5: 0.3: 0.05: 1.03: 0.1: 0.02; the thickness of the first foamed nickel matrix is 1.5mm, and the PPI is 120;
2. the rolling step before cutting in the step I is cancelled;
3. in the step II, the thickness of the first foamed nickel substrate is 1.5mm, the PPI is 120, the second foamed nickel substrate is cut according to the length equal to the length of the preliminary pole piece and the width exceeding the width of the preliminary pole piece, and the number of the superposed preliminary pole pieces is two.
After the 15Ah positive plate of the nickel-metal hydride battery manufactured by the method of example 2 was manufactured into a battery, 10 sample batteries were subjected to a capacity test (0.1C charging for 16 hours, standing for 30min, 0.2C discharging to 1.0V), and the results were sequentially as follows: 15480mAh, 15503mAh, 15589mAh, 15732mAh, 15630mAh, 15468mAh, 15678mAh, 15883mAh, 15329mAh and 15769mAh, the average capacity is 15606mAh, and the battery capacity meets the requirement.
Example 3
The steps of a method for manufacturing a positive plate of a nickel-metal hydride battery 22Ah are basically the same as those of the method for manufacturing the positive plate of the nickel-metal hydride battery 20Ah in example 1, and the difference is that:
1. in the step I, the cobalt-coated spherical nickel, the yttrium oxide and the cobaltous hydroxide are mixed according to the mass ratio of 9.2: 0.4: 0.4, mixing to form nickel-containing anode mixed powder, wherein the mass ratio of the nickel-containing anode mixed powder to the nickel-containing sodium carboxymethyl cellulose to the sodium polyacrylate to the 60% of polytetrafluoroethylene emulsion to the pure water to the styrene butadiene rubber to the fibers is 5: 2: 1: 0.1: 1.6: 0.2: 0.1; the thickness of the first foamed nickel matrix is 1.4mm, and the PPI is 110;
2. in the step II, the thickness of the first foamed nickel matrix is 1.4mm, the PPI is 110, the second foamed nickel matrix is cut according to the length exceeding the length of the preliminary pole piece and the width equal to the width of the preliminary pole piece, and the number of the superposed preliminary pole pieces is four;
3. and (4) eliminating the step of rolling again on the periphery of the product before cutting in the step (II).
After the positive electrode sheet 22Ah of the nickel-metal hydride battery manufactured by the method of example 3 was manufactured into a battery, 10 sample batteries were subjected to a capacity test (0.1C charging for 16 hours, standing for 30min, 0.2C discharging to 1.0V), and the results were sequentially as follows: 22580mAh, 22603mAh, 22579mAh, 22745mAh, 22668mAh, 22968mAh, 22844mAh, 23013mAh, 22930mAh and 22679mAh, the average capacity is 22761mAh, and the battery capacity meets the requirement.
Claims (4)
1. A manufacturing method of a nickel battery positive plate is characterized by comprising the following steps: firstly, immersing positive pole slurry in a first foamed nickel matrix, drying, scraping surface floating powder, cutting to prepare a primary pole piece, then, sequentially stacking a second foamed nickel matrix, at least one primary pole piece and a second foamed nickel matrix from bottom to top, integrally pressing and cutting to prepare the positive pole piece of the nickel battery, wherein the surface size of the second foamed nickel matrix is not less than that of the primary pole piece.
2. The method for manufacturing a positive electrode sheet for a nickel battery according to claim 1, wherein: the positive electrode slurry comprises nickel-containing positive electrode mixed powder, 3% of CMC glue solution, sodium polyacrylate, 60% of PTFE, pure water, styrene butadiene rubber and fibers in a mass ratio of 5-9: 0.5-1.5: 0.3-1.4: 0.05-0.1: 0.2-3: 0.05-0.2: 0.005-0.1, wherein the nickel-containing positive electrode mixed powder is cobalt-coated spherical nickel, yttrium oxide and cobaltous hydroxide according to the mass ratio of 9.2-9.98: 0.01-0.4: 0.01 to 0.4 by mixing.
3. The method for manufacturing a positive electrode sheet for a nickel battery according to claim 1, wherein: in the step I, the specific process for immersing the anode slurry into the first foamed nickel matrix comprises the following steps: placing the first foam nickel substrate in the anode slurry to be soaked for a certain time; rolling is carried out before cutting.
4. The method for manufacturing a positive electrode sheet for a nickel battery according to any one of claims 1 to 3, wherein: and in the step II, coating adhesive tapes on the edge parts of the periphery of the product after cutting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911003077.3A CN110729457A (en) | 2019-10-22 | 2019-10-22 | Method for manufacturing positive plate of nickel battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911003077.3A CN110729457A (en) | 2019-10-22 | 2019-10-22 | Method for manufacturing positive plate of nickel battery |
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| CN110729457A true CN110729457A (en) | 2020-01-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463429A (en) * | 2020-03-18 | 2020-07-28 | 山东合泰新能源有限公司 | Preparation method of high specific energy zinc-nickel battery positive electrode slurry |
| CN111463434A (en) * | 2020-03-18 | 2020-07-28 | 山东合泰新能源有限公司 | High specific energy zinc-nickel battery positive electrode |
Citations (7)
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| US5744263A (en) * | 1996-04-18 | 1998-04-28 | Matsushita Electric Industrial Co., Ltd. | Alkaline storage batteries and nickel electrodes having plurality of substrates |
| CN1722506A (en) * | 2004-07-13 | 2006-01-18 | 上海比亚迪有限公司 | Accumulator and its preparing method |
| CN101640272A (en) * | 2008-08-01 | 2010-02-03 | 比亚迪股份有限公司 | Anode material of alkaline secondary battery, anode and alkaline secondary battery |
| CN102157721A (en) * | 2011-03-22 | 2011-08-17 | 广东工业大学 | Method for manufacturing simulated battery pole piece used for laboratory |
| CN103138030A (en) * | 2013-02-26 | 2013-06-05 | 淄博国利新电源科技有限公司 | Preparation method of asymmetric rare earth capacitor battery |
| CN106848207A (en) * | 2017-03-06 | 2017-06-13 | 淄博君行电源技术有限公司 | The preparation method of water system capacitor batteries positive plate |
| CN108155346A (en) * | 2017-11-23 | 2018-06-12 | 合肥国轩高科动力能源有限公司 | A kind of preparation method of based lithium-ion battery positive plate |
-
2019
- 2019-10-22 CN CN201911003077.3A patent/CN110729457A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5744263A (en) * | 1996-04-18 | 1998-04-28 | Matsushita Electric Industrial Co., Ltd. | Alkaline storage batteries and nickel electrodes having plurality of substrates |
| CN1722506A (en) * | 2004-07-13 | 2006-01-18 | 上海比亚迪有限公司 | Accumulator and its preparing method |
| CN101640272A (en) * | 2008-08-01 | 2010-02-03 | 比亚迪股份有限公司 | Anode material of alkaline secondary battery, anode and alkaline secondary battery |
| CN102157721A (en) * | 2011-03-22 | 2011-08-17 | 广东工业大学 | Method for manufacturing simulated battery pole piece used for laboratory |
| CN103138030A (en) * | 2013-02-26 | 2013-06-05 | 淄博国利新电源科技有限公司 | Preparation method of asymmetric rare earth capacitor battery |
| CN106848207A (en) * | 2017-03-06 | 2017-06-13 | 淄博君行电源技术有限公司 | The preparation method of water system capacitor batteries positive plate |
| CN108155346A (en) * | 2017-11-23 | 2018-06-12 | 合肥国轩高科动力能源有限公司 | A kind of preparation method of based lithium-ion battery positive plate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463429A (en) * | 2020-03-18 | 2020-07-28 | 山东合泰新能源有限公司 | Preparation method of high specific energy zinc-nickel battery positive electrode slurry |
| CN111463434A (en) * | 2020-03-18 | 2020-07-28 | 山东合泰新能源有限公司 | High specific energy zinc-nickel battery positive electrode |
| CN111463429B (en) * | 2020-03-18 | 2022-01-07 | 山东合泰新能源有限公司 | Preparation method of high specific energy zinc-nickel battery positive electrode slurry |
| CN111463434B (en) * | 2020-03-18 | 2022-01-11 | 山东合泰新能源有限公司 | High specific energy zinc-nickel battery positive electrode |
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Application publication date: 20200124 |