CN104577224A - Method for manufacturing ultra-high temperature long-service life nickel-hydrogen batteries - Google Patents

Method for manufacturing ultra-high temperature long-service life nickel-hydrogen batteries Download PDF

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Publication number
CN104577224A
CN104577224A CN201410816955.4A CN201410816955A CN104577224A CN 104577224 A CN104577224 A CN 104577224A CN 201410816955 A CN201410816955 A CN 201410816955A CN 104577224 A CN104577224 A CN 104577224A
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Prior art keywords
nickel
add
temperature
minute
solid content
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Inventor
胡章勇
陈平
马国锋
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BST POWER (SHENZHEN) Ltd
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BST POWER (SHENZHEN) Ltd
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Priority to CN201410816955.4A priority Critical patent/CN104577224A/en
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/24Alkaline accumulators
    • H01M10/30Nickel accumulators
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/34Gastight accumulators
    • H01M10/345Gastight metal hydride accumulators
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of or comprising active material
    • H01M4/24Electrodes for alkaline accumulators
    • H01M4/26Processes of manufacture
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of or comprising active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • H01M4/48Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of or comprising active material
    • H01M4/62Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention provides a method for manufacturing ultra-high temperature long-service life nickel-hydrogen batteries. The method comprises the following steps: manufacturing positive pole pieces; manufacturing negative pole pieces. The method has the benefits that due to the application of a positive pole novel material, a negative pole novel material and a negative pole protection material, the 80-degree high-temperature efficiency is 80% or above; by acquiring the 80-degree high-temperature high charging efficiency, the efficient conversion of electric energy and discharging chemical energy from ordinary temperature to high temperature (20-80 DEG C) is guaranteed, generation of side reactions is greatly controlled, the abundant alkali liquor amount greatly postpones invalidation of batteries, the durable service (long service life) of batteries is ensured, the cycling service life reaches 1500 times (IEC 61951 division 7.5.1.2), and the batteries can satisfy the use requirements of electric devices in special fields, such as emergency lights, dust collectors and vehicle-mounted electric devices.

Description

Manufacture the method for superhigh temperature long-life nickel-hydrogen battery
Technical field
The present invention relates to field of batteries, particularly relate to the method manufacturing superhigh temperature long-life nickel-hydrogen battery.
Background technology
There are three aspect problems at present in high-temperature Ni/H 2 battery.1, high temperature compression part, high-temperature Ni/H 2 battery 55 degree of charge efficiencies generally can reach 90%, but along with increase in temperature, charge efficiency sharply reduces, and 70 ~ 80 degree of discharge and recharge transformation efficiencies are about 40 ~ 50%; 2, negative alloy powder seriously corroded, under highly basic effect, part rare earth metal dissolves, and capacity attenuation accelerates; 3, in recycling, enclosed construction Inner electrolysis matter dries up, and battery directly lost efficacy.Be applied to the nickel-hydrogen high-temperature battery in emergency light market, in the use in later stage, 40 ~ 50 degree of discharge times need ensure more than three hours, because charge efficiency is low, so do not reach corresponding requirements discharge time.Dust catcher battery, needs certain floating charge performance being applied to emergency light battery, more needs to possess the long discharge and recharge life-span in cycle (cycle life).On-vehicle battery is because the complexity of environment for use, and energy-storage battery temperature is comparatively broad, and temperature is roughly between 5 ~ 80 degree, how at high temperature to possess charge preferably transformation efficiency and certain resistance to floating charge performance and cycle life.Above electrical appliance all needs a special superhigh temperature Ni-MH battery of exploitation to meet particular requirement: under superhigh temperature, charge efficiency is high, has certain resistance to floating charge performance concurrently, the outstanding discharge and recharge life-span.Current domestic nickel-hydrogen high-temperature battery 70 degree of charge efficiencies can reach 80%, but resistance to floating charge poor performance.The ni-mh of relevant enterprise exploitation is low possesses outstanding cycle life (cycle life at 1000 times, IEC61951 § 7.5.1.2) from putting type, but high temperature efficiency low (55 degree of charge efficiencies 50 ~ 60%).How making environmentally friendly ni-mh product (effectively solved with lithium electricity high-temperature behavior business-like while of ni-mh, also comparatively ni-mh is expensive for cost) meet above electrical appliance requirement, is the technical problem faced present stage.In addition, domestic Ni-MH battery is general admixed with additives on positive electrode uses, and makes mechanical agitation evenly there is difficulty, and negative pole alloy doping anticorrosion process also rarely has report.
Summary of the invention
In order to solve the problems of the prior art, the invention provides a kind of method manufacturing superhigh temperature long-life nickel-hydrogen battery.
The invention provides a kind of method manufacturing superhigh temperature long-life nickel-hydrogen battery, make anode pole piece and comprise the steps:
A. 7.14kg pure water, 3.76kgCMC, 4kg ball nickel are stirred 7-9 minute;
B. add 33.60kg ball nickel and stir 24-28 minute;
C. add 1.50kgPTFE stirring and within 5-7 minute, obtain qualified solid content slurry;
D. solid content slurry is undertaken drawing oar, baking by nickel foam substrate;
E. positive electrode substrate is cut into each technique gauge size, clear powder, spot welding lug (nickel sheet), rubberized fabric thus complete positive pole tablet making technology.
As a further improvement on the present invention, make cathode pole piece to comprise the steps:
(1). 1.17kg pure water, 1.02kg nickel powder, 10.17kgEMC, 0.51kg rare earth addition are stirred 7-9 minute;
(2). add 50.86kg alloyed powder and stir 25-27 minute;
(3). add 0.76kg SBR, 0.51kg PTFE stirring and within 5-7 minute, obtain qualified solid content slurry;
(4). solid content slurry is undertaken drawing oar, baking by porous steel bands;
(5). negative pole matrix is cut into each technique gauge size, clear powder, spot welding lug (nickel sheet), rubberized fabric thus complete negative pole tablet making technology.
As a further improvement on the present invention, anode pole piece and cathode pole piece is used to manufacture superhigh temperature long-life nickel-hydrogen battery by processing technology.
As a further improvement on the present invention, described processing technology comprises the steps:
One. barrier film is placed between positive/negative plate, implants in pre-prepd box hat via winding process;
Two. non-short circuit semi-finished product are carried out jet-bedding, put the oil;
Three. carry out spot welding, positive pole ear is connected with block;
Four. note electrolyte step;
Five. carry out pressure cap, sealing process;
Six. carry out coding and obtain naked cell.
As a further improvement on the present invention, described processing technology also comprises the steps:
Seven. carry out preliminary filling, change into, detecting step;
Eight. carry out aging technique and obtain superhigh temperature long-life nickel-hydrogen battery.
As a further improvement on the present invention, described ball nickel is by one or more in codeposition zinc in the production process of hickelous nydroxide, cobalt, titanium or calcium/yttrium, described Zn content is between 2-4%, described cobalt content is between 7-10%, and one or more content in described titanium or calcium/yttrium are at 1-2%.
As a further improvement on the present invention, described ball nickel specific volume in 180-200mA/g, granularity at 10-20 μm.
As a further improvement on the present invention, positive plate active material compacted density is at 2.4-2.8g/cm 3, negative electrode active material compacted density is at 4.5-5.0g/cm 3.
As a further improvement on the present invention, described diaphragm paper thickness is at 0.14-0.20mm.
As a further improvement on the present invention, 7.14kg pure water, 3.76kg CMC, 4kg ball nickel are stirred 8 minutes by A.;
C. add 1.50kg PTFE to stir and within 6 minutes, obtain qualified solid content slurry;
(1). 1.17kg pure water, 1.02kg nickel powder, 10.17EMC, 0.51kg rare earth addition are stirred 8 minutes;
(2). add 50.86kg alloyed powder and stir 26 minutes;
(3). add 0.76kg SBR, 0.51kg PTFE stirs and within 6 minutes, obtain qualified solid content slurry.
The invention has the beneficial effects as follows: because of the application of positive pole and negative pole new material and negative pole protective material, 80 degree of high temperature efficiency are 80% or higher.The acquisition of 80 degree of high temperature high recharge efficiency, ensure that normal temperature to high temperature (20-80 DEG C) electric energy and discharge chemistry can Efficient Conversion, greatly control side reaction to occur, alkali lye amount makes plentifully battery failure greatly delay, ensure that the durable use of battery (long-life), cycle life reaches 1500 times (IEC61951 § 7.5.1.2).The lifting of positive pole ball nickel Co content, the design of both positive and negative polarity low tapped density alleviate pole piece and expand, and alkaloid substance too much in addition moves to barrier film from positive plate, thus reserve space for pole piece expands.Under high recharge efficiency and abundant alkali lye ensure, the lower 2-3 times of electricity releasing common identical volume type battery of superhigh temperature 80 degree, be that 60 degree of emergency lights use 4 years to establish charge efficiency basis, discharge time grows the feature with long service life, is just meeting the instructions for use of the special dimension electrical appliances such as emergency light, dust catcher, vehicle mounted electrical apparatus.
Accompanying drawing explanation
Fig. 1 is method flow diagram of the present invention.
Embodiment
As shown in Figure 1, the invention discloses a kind of method manufacturing superhigh temperature long-life nickel-hydrogen battery, comprising:
Making anode pole piece comprises the steps:
1. 7.14kg pure water, 3.76kgCMC, 4kg ball nickel are stirred 7-9 minute;
2. add 33.60kg ball nickel and stir 24-28 minute;
3. add 1.50kgPTFE stirring and within 5-7 minute, obtain qualified solid content slurry;
4. sieve;
5. draw oar, solid content slurry is undertaken drawing oar, baking by nickel foam substrate;
6. film-making, is cut into each technique gauge size by positive electrode substrate, clear powder, spot welding lug (nickel sheet), rubberized fabric thus complete positive pole tablet making technology.
Making cathode pole piece comprises the steps:
1. 1.17kg pure water, 1.02kg nickel powder, 10.17kgEMC, 0.51kg rare earth addition are stirred 7-9 minute;
2. add 50.86kg alloyed powder and stir 26 minutes;
3. add 0.76kg SBR, 0.51kg PTFE stirring and within 5-7 minute, obtain qualified solid content slurry;
4. sieve;
5. draw oar, solid content slurry is undertaken drawing oar, baking by porous steel bands;
6. negative pole matrix is cut into each technique gauge size, clear powder, spot welding lug (nickel sheet), rubberized fabric thus complete negative pole tablet making technology.
Use anode pole piece and cathode pole piece to manufacture superhigh temperature long-life nickel-hydrogen battery by processing technology, described processing technology comprises the steps:
7. barrier film is placed between positive/negative plate, implants in pre-prepd box hat via winding process;
8. non-short circuit semi-finished product are carried out jet-bedding, put the oil;
9. carry out spot welding, positive pole ear is connected with block;
10. electrolyte step is noted;
carry out pressure cap, sealing process;
carry out coding and obtain naked cell;
carry out preliminary filling, change into, detecting step;
carry out aging technique and obtain superhigh temperature long-life nickel-hydrogen battery.
Described ball nickel is by one or more in codeposition zinc in the production process of hickelous nydroxide, cobalt, titanium or calcium/yttrium, and described Zn content is between 2-4%, and described cobalt content is between 7-10%, and one or more content in described titanium or calcium/yttrium are at 1-2%.
Described ball nickel specific volume in 180-200mA/g, granularity at 10-20 μm.Positive plate active material compacted density is at 2.4-2.8g/cm 3, negative electrode active material compacted density is at 4.5-5.0g/cm 3.Described diaphragm paper thickness is at 0.14-0.20mm.
Patent abandoning tradition positive pole mechanical-physical admixed with additives (yittrium oxide, ytterbium oxide, erbium oxide, zirconia, cobalt protoxide, zinc oxide, sodium tungstate etc.) technique of the present invention.Without the need to adding other additives, the single hickelous nydroxide of direct use coordinates by a certain percentage with bonding agent (H2O:CMC: sub-nickel: PTFE=19:10:100:4), wherein bonding agent proportioning is variable, it accounts between solid active agents 1-3%, wet method slurry technique, on nickel foam substrate, make positive pole, positive plate active material compacted density is at 2.4-2.8g/cm 3.
Electrolyte adopts quaternary alkali system, and alkali concn is at 6.0-8.5mol/L, and its mass percent is as follows: H 2o (100): LiOH (2-3): NaOH (25-40): Na 2wO 4(26-53): Ba (OH) 2(0.1-0.3).
Diaphragm paper adopts polyethylene or the polypropylene of high-end import acetic acid grafting process, thickness at 0.14-0.20mm, the large series of alkalis suction quantity.
Negative pole adopts AB 5hydrogen storing alloy powder (packet header three moral hydrogen bearing alloy series), granularity is at 20-40 μm, and element quality group becomes: mishmetal Mm (32 ± 1.5): nickel (52 ± 1.5): (constituent content consists of MmNi to the special elements Al (1.5 ± 0.6) such as manganese Mn (5 ± 0.8) 3.96al 0.35mn 0.30Co 0.60) with pure water, conduct electricity nickel powder, additive (yittrium oxide, ytterbium oxide, erbium oxide, zirconia), bonding agent (EMC, SBR, PTFE) and form.Proportioning is 100:2.3:1-2.5:0.5-1.0:20:1.5:1.0, and wherein bonding agent proportioning is variable, and content accounts between solid active agents 0.5-1.5%, and wet method slurry technique is coated on porous nickel strap, and negative electrode active material compacted density is at 4.5-5.0g/cm 3.
CMC: CMC, PTFE: polytetrafluoroethylene, SBR: butadiene-styrene rubber, EMC: methyl ethyl carbonate, LiOH: lithium hydroxide, NaOH: sodium hydroxid, KOH: potassium hydroxide, Ba (OH) 2: barium hydroxide, Ca (OH) 2: calcium hydroxide.
The present invention and conventional wet technique difference are: pole material is without other additives, and negative pole introducing rare earth addition prevents the dissolving of alloy in highly basic, large, that ionic conductance the is large barrier film of liquid absorption is adopted to guarantee that battery alkalis suction quantity is at 1.8-2.4g/AH, improve ion in battery core diffusion inside speed, be beneficial to change into, partial volume.
The superhigh temperature long-life nickel-hydrogen battery manufactured by the present invention has following advantage:
Because of the application of positive pole and negative pole new material and negative pole protective material, 80 degree of high temperature efficiency are 80% or higher.The acquisition of 80 degree of high temperature high recharge efficiency, ensure that normal temperature to high temperature (20-80 DEG C) electric energy and discharge chemistry can Efficient Conversion, greatly control side reaction to occur, alkali lye amount makes plentifully battery failure greatly delay, ensure that the durable use of battery (long-life), cycle life reaches 1500 times (IEC61951 § 7.5.1.2).The lifting of positive pole ball nickel Co content, the design of both positive and negative polarity low tapped density alleviate pole piece and expand, and alkaloid substance too much in addition moves to barrier film from positive plate, thus reserve space for pole piece expands.Under high recharge efficiency and abundant alkali lye ensure, the lower 2-3 times of electricity releasing common identical volume type battery of superhigh temperature 80 degree, be that 60 degree of emergency lights use 4 years to establish charge efficiency basis, discharge time grows the feature with long service life, is just meeting the instructions for use of the special dimension electrical appliances such as emergency light, dust catcher, vehicle mounted electrical apparatus.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.

Claims (10)

1. manufacture a method for superhigh temperature long-life nickel-hydrogen battery, it is characterized in that,
Making anode pole piece comprises the steps:
A. 7.14kg pure water, 3.76kgCMC, 4kg ball nickel are stirred 7-9 minute;
B. add 33.60kg ball nickel and stir 24-28 minute;
C. add 1.50kgPTFE stirring and within 5-7 minute, obtain qualified solid content slurry;
D. solid content slurry is undertaken drawing oar, baking by nickel foam substrate;
E. positive electrode substrate is cut into each technique gauge size, clear powder, spot welding lug (nickel sheet), rubberized fabric thus complete positive pole tablet making technology.
2. method according to claim 1, is characterized in that, also comprises, and makes cathode pole piece and comprises the steps:
(1). 1.17kg pure water, 1.02kg nickel powder, 10.17kgEMC, 0.51kg rare earth addition are stirred 7-9 minute;
(2). add 50.86kg alloyed powder and stir 25-27 minute;
(3). add 0.76kg SBR, 0.51kg PTFE stirring and within 5-7 minute, obtain qualified solid content slurry;
(4). solid content slurry is undertaken drawing oar, baking by porous steel bands;
(5). negative pole matrix is cut into each technique gauge size, clear powder, spot welding lug (nickel sheet), rubberized fabric thus complete negative pole tablet making technology.
3. method according to claim 2, is characterized in that, uses anode pole piece and cathode pole piece to manufacture superhigh temperature long-life nickel-hydrogen battery by processing technology.
4. method according to claim 2, is characterized in that, described processing technology comprises the steps:
One. barrier film is placed between positive/negative plate, implants in pre-prepd box hat via winding process;
Two. non-short circuit semi-finished product are carried out jet-bedding, put the oil;
Three. carry out spot welding, positive pole ear is connected with block;
Four. note electrolyte step;
Five. carry out pressure cap, sealing process;
Six. carry out coding and obtain naked cell.
5. method according to claim 4, is characterized in that, described processing technology also comprises the steps:
Seven. carry out preliminary filling, change into, detecting step;
Eight. carry out aging technique and obtain superhigh temperature long-life nickel-hydrogen battery.
6. the method according to any one of claim 1 to 5, it is characterized in that, described ball nickel is by one or more in codeposition zinc in the production process of hickelous nydroxide, cobalt, titanium or calcium/yttrium, described Zn content is between 2-4%, described cobalt content is between 7-10%, and one or more content in described titanium or calcium/yttrium are at 1-2%.
7. method according to claim 6, is characterized in that, described ball nickel specific volume in 180-200mA/g, granularity at 10-20 μm.
8. method according to claim 2, is characterized in that, positive plate active material compacted density is at 2.4-2.8g/cm 3, negative electrode active material compacted density is at 4.5-5.0g/cm 3.
9. method according to claim 3, is characterized in that, described diaphragm paper thickness is at 0.14-0.20mm.
10. method according to claim 2, is characterized in that:
A. 7.14kg pure water, 3.76kg CMC, 4kg ball nickel are stirred 8 minutes;
B. add 33.60kg ball nickel and stir 26 minutes;
C. add 1.50kg PTFE to stir and within 6 minutes, obtain qualified solid content slurry;
(1). 1.17kg pure water, 1.02kg nickel powder, 10.17EMC, 0.51kg rare earth addition are stirred 8 minutes;
(2). add 50.86kg alloyed powder and stir 26 minutes;
(3). add 0.76kg SBR, 0.51kg PTFE stirs and within 6 minutes, obtain qualified solid content slurry.
CN201410816955.4A 2014-12-24 2014-12-24 Method for manufacturing ultra-high temperature long-service life nickel-hydrogen batteries Pending CN104577224A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105390755A (en) * 2015-11-05 2016-03-09 衡阳电科电源有限公司 Super-wide-temperature-range nickel-hydrogen battery and manufacturing method therefor
CN106410123A (en) * 2015-07-28 2017-02-15 深圳市量能科技有限公司 Negative electrode sheet for nickel-hydrogen battery and production method thereof, and nickel-hydrogen battery
CN108054370A (en) * 2017-12-15 2018-05-18 淄博君行电源技术有限公司 The positive electrode and preparation method of a kind of Ni-MH battery
CN108598551A (en) * 2018-06-27 2018-09-28 安徽相源新能源有限公司 A kind of lithium battery and its processing technology
CN109473632A (en) * 2018-11-15 2019-03-15 邹平铭波电源有限公司 The production method of positive plate for nickel-hydrogen cell
CN111740171A (en) * 2020-05-20 2020-10-02 湖南科霸汽车动力电池有限责任公司 Nickel-hydrogen battery and preparation method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106410123A (en) * 2015-07-28 2017-02-15 深圳市量能科技有限公司 Negative electrode sheet for nickel-hydrogen battery and production method thereof, and nickel-hydrogen battery
CN106410123B (en) * 2015-07-28 2019-07-19 深圳市量能科技有限公司 A kind of negative electrode tab, production method and nickel-metal hydride battery for nickel-metal hydride battery
CN105390755A (en) * 2015-11-05 2016-03-09 衡阳电科电源有限公司 Super-wide-temperature-range nickel-hydrogen battery and manufacturing method therefor
CN108054370A (en) * 2017-12-15 2018-05-18 淄博君行电源技术有限公司 The positive electrode and preparation method of a kind of Ni-MH battery
CN108598551A (en) * 2018-06-27 2018-09-28 安徽相源新能源有限公司 A kind of lithium battery and its processing technology
CN109473632A (en) * 2018-11-15 2019-03-15 邹平铭波电源有限公司 The production method of positive plate for nickel-hydrogen cell
CN111740171A (en) * 2020-05-20 2020-10-02 湖南科霸汽车动力电池有限责任公司 Nickel-hydrogen battery and preparation method thereof

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Application publication date: 20150429