CN111916581A - High-capacity rechargeable nickel-metal hydride battery and manufacturing method thereof - Google Patents
High-capacity rechargeable nickel-metal hydride battery and manufacturing method thereof Download PDFInfo
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- CN111916581A CN111916581A CN201910385671.7A CN201910385671A CN111916581A CN 111916581 A CN111916581 A CN 111916581A CN 201910385671 A CN201910385671 A CN 201910385671A CN 111916581 A CN111916581 A CN 111916581A
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- metal hydride
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/24—Alkaline accumulators
- H01M10/30—Nickel accumulators
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/24—Alkaline accumulators
- H01M10/28—Construction or manufacture
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a high-capacity rechargeable nickel-metal hydride battery and a manufacturing method thereof, belonging to the field of batteries, and the high-capacity rechargeable nickel-metal hydride battery comprises the following materials: the battery comprises a battery positive plate, a battery negative plate, a positive electrode tab, a negative electrode tab, electrolyte, an isolating film, a steel shell, a cap and a sealing ring, wherein the battery positive plate is a nickel hydroxide positive plate, and the battery negative plate is a hydrogen storage alloy negative plate. The manufacturing method of the nickel-metal hydride battery has the advantages of simple steps and convenience in operation, ensures that the overcharge and overdischarge resistance of the battery can be more effectively improved in the overcharge and overdischarge reaction processes, greatly improves the safety performance of the battery in use due to excellent overcharge and overdischarge resistance, and solves the problems of low production efficiency and low safety performance of the nickel-metal hydride battery caused by very troublesome manufacturing process of the nickel-metal hydride battery in the existing nickel-metal hydride battery manufacturing technology.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a high-capacity rechargeable nickel-metal hydride battery and a manufacturing method thereof.
Background
The nickel-metal hydride battery is a storage battery with good performance, and is divided into a high-voltage nickel-metal hydride battery and a low-voltage nickel-metal hydride battery, wherein an active substance of a positive plate of the nickel-metal hydride battery is Ni (OH) 2 (called as a NiO electrode), an active substance of a negative plate of the nickel-metal hydride battery is metal hydride and is also called as hydrogen storage alloy (called as a hydrogen storage electrode), an electrolyte is 6mol/L potassium hydroxide solution, and the nickel-metal hydride battery is more and more noticed as an important direction of hydrogen energy application.
As fossil fuels are developed and utilized on a large scale by human beings, in recent years, the development and utilization of hydrogen energy are increasingly regarded as important, and an important direction of the application of the nickel-metal hydride battery as the hydrogen energy is more and more noticed, however, the manufacturing process of the nickel-metal hydride battery in the existing nickel-metal hydride battery manufacturing technology is very troublesome, so that the nickel-metal hydride battery has low production efficiency and low safety performance.
Disclosure of Invention
Technical problem to be solved
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a high-capacity rechargeable nickel-metal hydride battery and a manufacturing method thereof, which have the advantages of simplicity in operation and high safety performance and solve the problems of low production efficiency and low safety performance of the nickel-metal hydride battery caused by very troublesome manufacturing process of the nickel-metal hydride battery in the conventional nickel-metal hydride battery manufacturing technology.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a high capacity rechargeable nickel-metal hydride battery comprising the following materials: the battery comprises a battery positive plate, a battery negative plate, a positive electrode tab, a negative electrode tab, electrolyte, an isolating film, a steel shell, a cap and a sealing ring, wherein the battery positive plate is a nickel hydroxide positive plate, and the battery negative plate is a hydrogen storage alloy negative plate.
Preferably, the isolation film is made of one or three composite layers of vinylon, polypropylene or nylon, the single-layer thickness is 0.01-0.02mm, and the thickness of the three composite layers is 0.02-0.025 mm.
Preferably, the electrolyte is formed by mixing KOH, LiOH and NaOH, and the weight ratio of the KOH, the LiOH and the NaOH is as follows: KOH: LiOH: NaOH =40:1: 3.
Preferably, the steel shell is cylindrical, one end of the steel shell is open, the thickness of the steel shell is 0.2mm, the steel shell is made of CPCEN steel, and the inner layer and the outer layer of the steel shell are plated with nickel.
Preferably, the cap is made of CCPC steel, the surface of the cap is plated with nickel, an anti-explosion ball is arranged in the middle of the back surface of the cap, and the anti-explosion ball is made of ethylene propylene diene monomer.
Preferably, the sealing ring is hollow and circular, the inner diameter of the sealing ring is matched with the cover cap, the outer diameter of the sealing ring is matched with the inner diameter of the steel shell, the bottom of the sealing ring is provided with a protruding step, and the sealing ring is made of nylon-66.
Another technical problem to be solved by the present invention is to provide a method for manufacturing a high-capacity rechargeable nickel-metal hydride battery, comprising the following steps:
cutting prepared battery positive plates and battery negative plates into required small positive plates and small negative plates according to requirements;
winding the small positive pole piece, the small negative pole piece and the isolating film cut in the step one by a winding machine, placing the isolating film between the small positive pole piece and the small negative pole piece, and forming a bare cell after the adhesive tape is applied;
step three, carrying out short circuit test on the bare cell formed in the step two, and if no short circuit occurs, firstly putting an insulating gasket into a steel shell;
step four, drying the qualified battery cell in the step three by using a vacuum baking machine under the constant temperature condition, wherein the vacuum degree is-0.095-0.10 Mpa, the vacuum is pumped once per hour, nitrogen is injected once, and the nitrogen pressure is not more than 0.5 Mpa;
step five, placing the dried bare cell in the step four into a steel shell, and welding a negative electrode tab at the bottom of the steel shell by using an electric welding machine;
step six, rolling the open end of the steel shell with the naked electric core into a groove with the depth of about 1mm by using a channeling machine, then adding electrolyte into the steel shell in the step five in a vacuum environment, and completely sealing the naked electric core;
welding the positive pole lug on the cover cap by laser welding, combining the sealing ring and the cover cap together, welding the cover cap and the steel shell together, and finally sealing by using a battery sealing compound to manufacture the nickel-hydrogen battery.
(III) advantageous effects
Compared with the prior art, the invention provides a high-capacity rechargeable nickel-metal hydride battery and a manufacturing method thereof, and the high-capacity rechargeable nickel-metal hydride battery has the following beneficial effects:
1. the manufacturing method of the nickel-metal hydride battery has the advantages of simple steps and convenience in operation, ensures that the overcharge and overdischarge resistance of the battery can be more effectively improved in the overcharge and overdischarge reaction processes, greatly improves the safety performance of the battery in use due to excellent overcharge and overdischarge resistance, and solves the problems of low production efficiency and low safety performance of the nickel-metal hydride battery caused by very troublesome manufacturing process of the nickel-metal hydride battery in the existing nickel-metal hydride battery manufacturing technology.
2. The isolating membrane has the advantages of large ion permeability, proper mechanical strength, insulator and no reaction with electrolyte and electrodes, and can avoid the direct contact of active substances on the positive pole piece and the negative pole piece of the battery to cause the short circuit inside the battery in the use process.
3. The CPCEN steel is used as the battery steel shell, so that the nickel-metal hydride battery has the advantages of strong alkali liquor corrosion resistance, good flexibility and deep drawing resistance, the explosion phenomenon of the nickel-metal hydride battery can be avoided by arranging the explosion-proof ball, and the safety of the nickel-metal hydride battery is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
a high capacity rechargeable nickel-metal hydride battery comprising the following materials: the battery comprises a battery positive plate, a battery negative plate, a positive electrode tab, a negative electrode tab, electrolyte, an isolating film, a steel shell, a cap and a sealing ring, wherein the battery positive plate is a nickel hydroxide positive plate, and the battery negative plate is a hydrogen storage alloy negative plate
Furthermore, the isolating membrane is made of one or three composite layers of vinylon, polypropylene or nylon, the single layer thickness is 0.01-0.02mm, the thickness of the three composite layers is 0.02-0.025mm, and all the vinylon, the polypropylene and the nylon have the advantages of large ion permeability, proper mechanical strength, insulator and no reaction with electrolyte and electrodes.
Further, the electrolyte is formed by mixing KOH, LiOH and NaOH, and the weight ratio of the KOH, the LiOH and the NaOH is as follows: KOH: LiOH: NaOH =40:1: 3.
Further, the steel casing is cylindrical, and one end opening, thickness are 0.2mm, the material of steel casing is CPCEN steel, the ectonexine of steel casing all plated nickel, and CPCEN steel has strong alkali lye corrosion resistance, and the pliability is good, the advantage of resistant deep-drawing.
Furthermore, the nut cap is made of CCPC steel, the surface of the nut cap is plated with nickel, the middle of the reverse side of the nut cap is provided with an explosion-proof ball, the explosion-proof ball is made of ethylene propylene diene monomer, the explosion phenomenon of the nickel-metal hydride battery can be avoided by arranging the explosion-proof ball, and the safety of the nickel-metal hydride battery is improved.
Furthermore, the sealing ring is hollow and circular, the inner diameter of the sealing ring is matched with the cap, the outer diameter of the sealing ring is matched with the inner diameter of the steel shell, the bottom of the sealing ring is provided with a protruding step, and the sealing ring is made of nylon-66.
A method for manufacturing a high-capacity rechargeable nickel-metal hydride battery comprises the following steps:
cutting prepared battery positive plates and battery negative plates into required small positive plates and small negative plates according to requirements;
winding the small positive pole piece, the small negative pole piece and the isolating film cut in the step one by a winding machine, placing the isolating film between the small positive pole piece and the small negative pole piece, and forming a bare cell after finishing rubberizing so as to avoid short circuit inside the battery caused by direct contact of active substances on the two poles;
step three, carrying out short circuit test on the bare cell formed in the step two, and if no short circuit occurs, firstly putting an insulating gasket into a steel shell;
and step four, drying the qualified battery cell in the step three by using a vacuum baking machine under the constant temperature condition, wherein the vacuum degree is-0.095-0.10 Mpa, the vacuum is pumped once per hour, and nitrogen is injected once, and the nitrogen pressure is not more than 0.5 Mpa.
Step five, placing the dried bare cell in the step four into a steel shell, and welding a negative electrode tab at the bottom of the steel shell by using an electric welding machine;
step six, rolling the open end of the steel shell with the naked electric core into a groove with the depth of about 1mm by using a channeling machine, then adding electrolyte into the steel shell in the step five in a vacuum environment, and completely sealing the naked electric core;
welding the positive pole lug on the cover cap by laser welding, combining the sealing ring and the cover cap together, welding the cover cap and the steel shell together, and finally sealing by using a battery sealing compound to manufacture the nickel-hydrogen battery.
The electrochemical reaction of the nickel-metal hydride battery manufactured by the method in normal and overcharge and overdischarge processes is as follows:
during normal charging:
and (3) positive pole reaction: ni (OH)2 + OH- → NiOOH + H2O + e-
And (3) cathode reaction: m + H2O + e- → MH + OH-
And (3) total reaction: m + Ni (OH)2 → MH + NiOOH
During normal discharge:
and (3) positive electrode: NiOOH + H2O + e- → Ni(OH)2 + OH-
Negative electrode: MH + OH- → M + H2O + e-
And (3) total reaction: MH + NiOOH → M + Ni (OH)2
And (3) during overcharge:
and (3) positive electrode: 4OH- → 2H2O + O2 + 4e-
Negative electrode: 4M + 4H2O +4e- → 4MH +4OH-
4MH+O2 → 4M+2H2O
And (3) total reaction: no material consumption
And (3) during overdischarge:
and (3) positive electrode: h2O + e- → 1/2H2 + OH-
Negative electrode: MH + OH- → H2O+M+e-
M +1/2H2 → MH
And (3) total reaction: no material consumption
It can be seen that the nickel-hydrogen battery reaction only transfers substances between the positive and negative electrodes of the battery under normal reaction conditions or overcharge and overdischarge reaction conditions, does not consume the electrolyte of the battery and the internal components of the battery, the self-balancing of the internal substances of the battery can be realized, which ensures that the battery has good over-charge and over-discharge characteristics in principle, the cathode of the nickel-hydrogen battery is composed of about 50 percent of nickel, the enrichment of nickel on the alloy surface layer is realized in the continuous electrochemical reaction process, because nickel is an excellent catalyst of the electrochemical reaction in an electrochemical system, and the dynamic characteristics of the battery are considered in the battery design process, the discharge reserve and the charge reserve are designed, so that the overcharge and overdischarge resistance of the battery can be more effectively improved in the overcharge and overdischarge reaction processes, and the excellent overcharge and overdischarge resistance greatly improves the use safety performance of the battery.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (7)
1. A high-capacity rechargeable nickel-metal hydride battery is characterized in that: comprises the following materials: the battery comprises a battery positive plate, a battery negative plate, a positive electrode tab, a negative electrode tab, electrolyte, an isolating film, a steel shell, a cap and a sealing ring, wherein the battery positive plate is a nickel hydroxide positive plate, and the battery negative plate is a hydrogen storage alloy negative plate.
2. A large capacity rechargeable nickel-hydrogen battery as claimed in claim 1, characterized in that: the isolating membrane is made of one or three composite layers of vinylon, polypropylene or nylon, the thickness of a single layer is 0.01-0.02mm, and the thickness of the three composite layers is 0.02-0.025 mm.
3. A large capacity rechargeable nickel-hydrogen battery as claimed in claim 1, characterized in that: the electrolyte is formed by mixing KOH, LiOH and NaOH, and the weight ratio of the KOH to the LiOH to the NaOH is as follows: KOH: LiOH: NaOH =40:1: 3.
4. A large capacity rechargeable nickel-hydrogen battery as claimed in claim 1, characterized in that: the steel shell is cylindrical, and one end opening, thickness are 0.2mm, the material of steel shell is CPCEN steel, the ectonexine of steel shell has all plated nickel.
5. A large capacity rechargeable nickel-hydrogen battery as claimed in claim 1, characterized in that: the cap is made of CCPC steel, nickel is plated on the surface of the CCPC steel, an anti-explosion ball is arranged in the middle of the back surface of the cap, and the anti-explosion ball is made of ethylene propylene diene monomer.
6. A large capacity rechargeable nickel-hydrogen battery as claimed in claim 1, characterized in that: the sealing ring is hollow and circular, the inner diameter of the sealing ring is matched with the cap, the outer diameter of the sealing ring is matched with the inner diameter of the steel shell, the bottom of the sealing ring is provided with a protruding step, and the sealing ring is made of nylon-66.
7. A method for manufacturing a high-capacity rechargeable nickel-metal hydride battery is characterized by comprising the following steps of:
cutting prepared battery positive plates and battery negative plates into required small positive plates and small negative plates according to requirements;
winding the small positive pole piece, the small negative pole piece and the isolating film cut in the step one by a winding machine, placing the isolating film between the small positive pole piece and the small negative pole piece, and forming a bare cell after the adhesive tape is applied;
step three, carrying out short circuit test on the bare cell formed in the step two, and if no short circuit occurs, firstly putting an insulating gasket into a steel shell;
step four, drying the qualified battery cell in the step three by using a vacuum baking machine under the constant temperature condition, wherein the vacuum degree is-0.095-0.10 Mpa, the vacuum is pumped once per hour, nitrogen is injected once, and the nitrogen pressure is not more than 0.5 Mpa;
step five, placing the dried bare cell in the step four into a steel shell, and welding a negative electrode tab at the bottom of the steel shell by using an electric welding machine;
step six, rolling the open end of the steel shell with the naked electric core into a groove with the depth of about 1mm by using a channeling machine, then adding electrolyte into the steel shell in the step five in a vacuum environment, and completely sealing the naked electric core;
welding the positive pole lug on the cover cap by laser welding, combining the sealing ring and the cover cap together, welding the cover cap and the steel shell together, and finally sealing by using a battery sealing compound to manufacture the nickel-hydrogen battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910385671.7A CN111916581A (en) | 2019-05-09 | 2019-05-09 | High-capacity rechargeable nickel-metal hydride battery and manufacturing method thereof |
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| CN201910385671.7A CN111916581A (en) | 2019-05-09 | 2019-05-09 | High-capacity rechargeable nickel-metal hydride battery and manufacturing method thereof |
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Application publication date: 20201110 |