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WO2018147019A1 - Batterie au nickel-hydrogène - Google Patents

Batterie au nickel-hydrogène Download PDF

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Publication number
WO2018147019A1
WO2018147019A1 PCT/JP2018/001191 JP2018001191W WO2018147019A1 WO 2018147019 A1 WO2018147019 A1 WO 2018147019A1 JP 2018001191 W JP2018001191 W JP 2018001191W WO 2018147019 A1 WO2018147019 A1 WO 2018147019A1
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WO
WIPO (PCT)
Prior art keywords
active material
electrode active
material layer
current collector
separator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/001191
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English (en)
Japanese (ja)
Inventor
聡 河野
厚志 南形
英明 篠田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of WO2018147019A1 publication Critical patent/WO2018147019A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
    • H01M50/491—Porosity
    • 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
    • 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
    • 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
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • 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

Definitions

  • the present invention relates to a nickel metal hydride battery.
  • a nickel metal hydride battery including an electrode structure having a positive electrode active material-containing current collector containing a positive electrode active material in a hole, a separator, a negative electrode active material layer, and a negative electrode current collector in this order. Yes.
  • the positive electrode active material contracts during charging and expands during discharge, while the negative electrode active material expands during charging and contracts during discharge.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a nickel-metal hydride battery that can improve the charge / discharge resistance near full charge.
  • the thickness of the negative electrode active material layer increases with discharge, the positive electrode active material contracts in the pores of the porous positive electrode current collector, and therefore the thickness of the positive electrode current collector does not decrease during discharge. Therefore, when compressive stress is applied to the electrode structure in the thickness direction and the increase in the total thickness of the electrode structure is restricted, the soft separator is compressed corresponding to the expansion of the negative electrode active material layer during charging. As a result, the thickness and porosity of the separator are reduced, and the amount of the electrolyte retained in the separator is reduced. Thereby, the resistance with respect to charging / discharging near full charge increases especially. This tendency is particularly noticeable when the separator is thin.
  • a nickel metal hydride battery according to the present invention includes a first current collector, a positive electrode active material layer, a separator, a negative electrode active material layer, and a second current collector in this order, and the electrode structure with respect to the electrode structure.
  • a compression force applying mechanism that applies a compression force in the thickness direction of the electrode structure.
  • the positive electrode active material layer contains nickel hydroxide
  • the negative electrode active material layer contains a hydrogen storage alloy
  • the thickness of the separator is 50 to 80 ⁇ m under the compressive force.
  • the compressive force applying mechanism applies a compressive force in the thickness direction of the electrode structure
  • the separator and the positive electrode active material layer and the separator and the negative electrode active layer are formed by gas bubbles generated in the charge / discharge process. Generation of a gap between the material layers is suppressed, and an increase in resistance due to the inclusion of bubbles is suppressed. Further, since the separator is sufficiently thin, the charge / discharge resistance can be lowered. Furthermore, the positive electrode active material layer and the negative electrode active material layer are provided outside the first and second current collectors but not outside them.
  • the increase in the total thickness of the electrode structure is regulated by the compressive force applying mechanism, but the positive electrode active material layer can contract when the negative electrode active material layer expands during charging, and the positive electrode active material layer expands during discharge. In doing so, the negative electrode active material layer can shrink. Therefore, although the separator is thin, excessive compression of the separator accompanying charge / discharge can be suppressed, and an increase in resistance due to a decrease in the liquid amount of the separator in the vicinity of full charge can also be suppressed.
  • the compressive force applying mechanism has a thickness of the separator in a state where there is no compressive force in the thickness direction as T0, and a thickness of the separator in a state in which the compressive force is applied by the compressive force applying mechanism is T1. , 0 ⁇ 1- (T1 / T0) ⁇ 0.35, a compressive force can be applied to the electrode structure.
  • the lower limit of 1- (T1 / T0) is preferably 0.1.
  • the thickness ratio of the first current collector to the positive electrode active material layer is 1:10 to 5: 7
  • the thickness ratio of the second current collector to the negative electrode active material layer is 1:10 to 5: 6.
  • the first current collector has another negative electrode active material layer on a surface opposite to the surface facing the positive electrode active material layer, and faces the negative electrode active material layer of the second current collector.
  • Another positive electrode active material layer can be provided on the surface opposite to the surface to be formed.
  • the first current collector and the second current collector may each include a nickel layer.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a nickel-metal hydride battery that can improve the charge / discharge resistance near full charge.
  • a nickel metal hydride battery 10 includes an electrode structure 25, a case 65, and a compression force applying mechanism 70 that applies a compression force to the electrode structure 25 in the thickness direction.
  • the electrode structure 25 includes a plurality of bipolar electrodes 12, a positive terminal electrode 30, a positive terminal member 35, a negative terminal electrode 40, a negative terminal member 45, and a spacer 60.
  • Each of the bipolar electrodes 12 includes a current collector 16 having one surface 16a and the other surface 16b opposite to the one surface 16a, a positive electrode active material layer 18 provided on the one surface 16a, A negative electrode active material layer 20 provided on the other surface 16b.
  • the plurality of bipolar electrodes 12 are stacked in series via the separator 14, that is, the positive electrode active material layer 18 and the negative electrode active material layer 20 are opposed via the separator 14.
  • Each current collector 16 can be a nickel foil.
  • the structure of the current collector, such as nickel foil is not particularly limited. Usually, it is preferably non-porous, that is, a plate having no pore structure, but may have a pore structure.
  • the current collector such as nickel foil may have a so-called punching metal shape having a through hole having a hole diameter of about 10 to 2000 ⁇ m, for example.
  • the current collector 16 may have a roughened surface shape such as a nickel foil whose surface is roughened.
  • the nickel foil does not have to be a solid foil.
  • At least a nickel layer such as a Ni-plated foil (a laminate of a nickel-plated layer and a metal foil such as a steel foil) such as a steel plate with a Ni-plated surface is used. You may have.
  • Each current collector 16 may be a layer of a conductive material such as a metal material other than nickel.
  • An example of the thickness of the current collector 16 is 10 to 100 ⁇ m.
  • the positive electrode active material layer 18 includes particles of nickel hydroxide (Ni (OH) 2 ) as a positive electrode active material.
  • the positive electrode active material layer 18 refers to a portion provided on the main surface of the current collector 16 and does not include the positive electrode active material present in the current collector 16.
  • the thickness ratio between the current collector 16 and the positive electrode active material layer 18 is not particularly limited, but may be 1:10 to 5: 7.
  • An example of the thickness of the positive electrode active material layer 18 is 10 to 200 ⁇ m.
  • the positive electrode active material may fill the pores in the current collector separately from the positive electrode active material layer 18.
  • the positive electrode active material may be filled in the through hole separately from the positive electrode active material layer 18.
  • the positive electrode active material layer 18 includes a conductive additive such as metallic cobalt and a cobalt compound; an overcharge additive such as Y 2 O 3 and WO 3 ; a binder such as an acrylic resin and carboxymethyl cellulose; Can be included.
  • a conductive additive such as metallic cobalt and a cobalt compound
  • an overcharge additive such as Y 2 O 3 and WO 3
  • a binder such as an acrylic resin and carboxymethyl cellulose
  • the negative electrode active material layer 20 includes particles of a hydrogen storage alloy as a negative electrode active material.
  • the negative electrode active material layer 20 refers to a portion provided on the main surface of the current collector 16 and does not include the negative electrode active material present in the current collector 16.
  • the thickness ratio between the current collector 16 and the negative electrode active material layer 20 is not particularly limited, but may be 1:10 to 5: 6.
  • An example of the thickness of the negative electrode active material layer 20 is 10 to 150 ⁇ m.
  • the negative electrode active material may be filled in the pores separately from the negative electrode active material layer 20.
  • the current collector is a punching metal, the negative electrode active material may be filled in the through hole separately from the negative electrode active material layer 20.
  • the negative electrode active material layer 20 can contain, in addition to the negative electrode active material, a conductive aid such as carbon black or ketjen black; a binder such as acrylic resin or carboxymethyl cellulose.
  • a conductive aid such as carbon black or ketjen black
  • a binder such as acrylic resin or carboxymethyl cellulose.
  • N / P can be 1.2 to 2.
  • the separator 14 is disposed between the bipolar electrodes 12 adjacent to each other, between the positive electrode termination electrode 30 and the bipolar electrode 12, and between the bipolar electrode 12 and the negative electrode termination electrode 40.
  • the separator 14 is a porous film or a nonwoven fabric, for example.
  • the separator 14 can permeate the electrolytic solution.
  • Examples of the material of the separator 14 include polyolefins such as polyethylene and polypropylene, and polyimide.
  • One main surface of the separator 14 is in contact with the positive electrode active material layer 18, and the other main surface is in contact with the negative electrode active material layer 20.
  • the thickness T1 of the separator in a state where the compressive force is applied by the compressive force applying mechanism 70 is 50 to 80 ⁇ m.
  • separator thickness T0 in an uncompressed state is 60 to 110 ⁇ m.
  • the separator thickness T1 satisfies the above under compressive force when the SOC (charged state) is 0 to 100%.
  • an alkaline solution such as an aqueous potassium hydroxide solution can be used.
  • the positive electrode termination electrode 30 is disposed via the separator 14 at one end in the Z-axis direction of the plurality of bipolar electrodes 12 (bipolar electrode group).
  • the positive electrode termination electrode 30 includes an outer current collector 31 that is a metal plate made of nickel, stainless steel, a Ni-plated steel plate, and the like, and an outer positive electrode active material layer 33 provided on one surface 31 a of the outer current collector 31. And have.
  • the outer current collector 31 is thicker than the current collector 16 in the Z-axis direction.
  • the outer positive electrode active material layer 33 has the same configuration as the positive electrode active material layer 18 in the bipolar electrode 12.
  • the negative terminal electrode 40 is disposed via the separator 14 at the other end in the Z-axis direction of the plurality of bipolar electrodes 12 (bipolar electrode group).
  • the negative electrode termination electrode 40 includes an outer current collector 41 that is a metal plate made of nickel, stainless steel, a Ni-plated steel plate, and the like, and an outer negative electrode active material layer 43 provided on one surface 41a of the outer current collector 41. And have.
  • the outer current collector 41 is thicker than the current collector 16 in the Z-axis direction.
  • the outer negative electrode active material layer 43 has the same configuration as the negative electrode active material layer 20 in the bipolar electrode 12.
  • the positive electrode terminal member 35 is disposed between the positive electrode termination electrode 30 and the restraining body 50 and is disposed in contact with the outer current collector 31 of the positive electrode termination electrode 30.
  • the positive electrode terminal member 35 has a contact portion 37 and a lead portion 39.
  • the contact portion 37 is disposed in contact with the other surface 31 b of the outer current collector 31 in the positive electrode termination electrode 30.
  • the lead-out portion 39 is inserted through a through portion 65 a in the case 65 described in detail later, and is pulled out to the outside of the case 65.
  • the negative electrode terminal member 45 is disposed between the negative electrode termination electrode 40 and the restraining body 50 and is disposed in contact with the outer current collector 41 of the negative electrode termination electrode 40.
  • the negative terminal member 45 has a contact portion 47 and a lead portion 49.
  • the contact portion 47 is disposed in contact with the other surface 41 b of the outer current collector 41 in the negative electrode termination electrode 40.
  • the lead-out portion 49 is inserted through a through portion 65 a in the case 65 described in detail later, and is pulled out to the outside of the case 65.
  • the lead-out part 39 and the lead-out part 49 described above function as charging / discharging terminals of the nickel metal hydride battery 10.
  • the spacer 60 forms an outer shell in the gap between the current collectors 16 of the adjacent bipolar electrodes 12, and forms an accommodation space S between the current collectors 16 adjacent to each other.
  • the spacer 60 is disposed along the peripheral edge 16c of the current collector 16, and is formed as a frame.
  • the length of one side of the spacer 60 can be set to, for example, 10 mm to 1,000 mm.
  • the spacer 60 can be formed from a rubber-based resin having resistance to an electrolytic solution (potassium hydroxide). Examples of the rubber-based resin include EPDM (ethylene / propylene / diene rubber) and fluorine rubber. Both ends of the spacer 60 in the axial direction can be bonded to the surface of the current collector.
  • the case 65 is a cylindrical body of resin formed in a cylindrical shape, and surrounds and holds the side surface of the electrode structure 25.
  • the case 65 is filled with an electrolytic solution.
  • the case 65 is made of an insulating resin that has corrosion resistance to an electrolytic solution (potassium hydroxide) and low gas permeability. Examples of the resin forming the case 65 include modified PPE (modified polyphenylene ether) and PPS (polyphenylene sulfide).
  • the compressive force applying mechanism 70 includes a pair of restraining bodies 50 and 50, a bolt B, and a nut N.
  • the pair of restraining bodies 50, 50 sandwich the electrode structure 25 and the case 65 in the thickness direction (Z direction) of the electrode structure 25.
  • the pair of restraining bodies 50, 50 can be formed of a metal material such as SUS (stainless steel) and a resin.
  • the pair of restraining bodies 50, 50 have through holes 50a for penetrating bolts B extending in the Z-axis direction.
  • the through hole 50a is disposed outside the case 65 when viewed from the Z-axis direction.
  • the bolt B is inserted from one restraint body 50 toward the other restraint body 50.
  • a nut N is screwed to the tip of the bolt B.
  • the pair of restraining bodies 50, 50 apply a compressive force in the Z direction (the thickness direction of the electrode structure 25) to the electrode structure 25 and the case 65.
  • the case 65 is sealed.
  • the separator 14 in the electrode structure 25 is maintained in a compressed state, and an increase in the total thickness of the electrode structure 25 is restricted.
  • the inner periphery of the through hole and the bolt seat surface and the peripheral surface thereof are insulated.
  • the separator 14 in the electrode structure 25 has a pore structure or a fiber structure, it is soft, that is, has elasticity. Therefore, the separator 14 can be compressed and thinned by the compressive force of the compressive force applying mechanism 70. For example, if the axial length of the case 65 is shorter than the thickness of the electrode structure 25 when no compressive force is applied, the separator 14 can be easily compressed by the compressive force applying mechanism 70. That is, the degree of compression of the separator by the compressive force applying mechanism 70 can be adjusted as appropriate by changing the difference between the thickness of the electrode structure 25 in a state where no compressive stress is applied and the length of the case 65 in the Z-axis direction.
  • the thickness of the separator 14 in a state where no compressive stress in the thickness direction is applied is T0
  • the thickness of the separator 14 in a state where the compressive stress in the thickness direction is applied is T1.
  • the compressive force applying mechanism 70 applies a compressive force in the thickness direction to the electrode structure 25 so as to satisfy 0 ⁇ 1- (T1 / T0) ⁇ 0.35.
  • the lower limit of 1- (T1 / T0) is preferably 0.1 or more.
  • the thickness of the separator 14 can vary depending on the SOC, but it is sufficient that the above relationship is satisfied when the SOC is 0 to 100%.
  • the compressive force applying mechanism 70 applies a compressive force in the thickness direction of the electrode structure 25, so that the separator 14 and the positive electrode are generated by gas bubbles generated in the charge / discharge process. Generation of gaps between the active material layers 18 and between the separator 14 and the negative electrode active material layer 20 is suppressed, and an increase in resistance due to the inclusion of bubbles is suppressed. Further, since the separator 14 is sufficiently thin, the charge / discharge resistance can be lowered.
  • the increase in the total thickness of the electrode structure 25 at the time of use is restricted by the compressive force imparting mechanism 70, but the positive electrode active is not provided inside each current collector 16 but outside them. Since the material layer 18 and the negative electrode active material layer 20 are provided, when the negative electrode active material layer 20 expands during charging, the positive electrode active material layer 18 can contract, and when the positive electrode active material layer 18 expands during discharge. The negative electrode active material layer 20 can shrink. Therefore, although the separator 14 is thin, excessive compression of the separator 14 due to charge / discharge can be reduced, and an increase in resistance due to a decrease in the liquid amount of the separator 14 in the vicinity of full charge can be suppressed.
  • “full charge” means about 80 to 100% in terms of SOC.
  • the compressive force applying mechanism 70 has a thickness of the separator 14 in a state where there is no compressive stress in the thickness direction as T0, and the thickness of the separator in a state where the thickness is regulated by the compressive force applying mechanism 70 is T1.
  • a compressive force is applied to the electrode structure 25 so as to satisfy ⁇ 1- (T1 / T0) ⁇ 0.35. Therefore, by setting the upper limit of the degree of compression of the separator, it is possible to prevent the separator from being excessively compressed and the resistance from increasing.
  • the positive electrode active material layer 18 is the bipolar electrode which has the negative electrode active material layer 20 in the one surface of each collector 16, the effect which can reduce connection resistance between cells is effective. is there.
  • the compression force applying mechanism 70 includes a pair of restraining bodies 50 and 50, a bolt B, and a nut N.
  • a compression force applying mechanism of other forms is there.
  • a metal can is adopted as the compression force application mechanism, the electrode structure 25 is accommodated in the metal can, and a compression force can be applied to the electrode structure from the upper and lower surfaces of the metal can in the thickness direction.
  • a positive electrode having a positive electrode active material layer 18 on both sides of the current collector 16 and a negative electrode having a negative electrode active material layer 20 on both sides of the current collector are alternately arranged via separators 14. It can also be implemented with the arranged electrode structure.
  • the electrode structure 25 includes at least a current collector (first current collector), a positive electrode active material layer, a separator, a negative electrode active material layer, and a current collector (second current collector) in this order.
  • the number of stacked battery cells (positive electrode active material layer and negative electrode active material layer) is not particularly limited.
  • the electrode structure 25 may not include the positive electrode termination electrode 30, the positive electrode terminal member 35, the negative electrode termination electrode 40, the negative electrode terminal member 45, and the spacer 60.
  • the current collecting / wiring method at both ends of the cell can be selected as appropriate, and the spacer 60 is not particularly essential.
  • the form of the case 65 can be variously modified.
  • Such a nickel metal hydride battery 10 can be used as a nickel metal hydride secondary battery mounted on a vehicle such as a forklift, a hybrid vehicle, or an electric vehicle.
  • Example 1 A solid nickel foil having no pore structure was used as a positive electrode and negative electrode current collector. A positive electrode having a positive electrode active material layer provided on one side of a nickel foil and a negative electrode having a negative electrode active material layer provided on one side of another nickel foil were prepared.
  • the blending weight ratio of the positive electrode active material layer was 91.3 / 5/1/2 / 0.7 in nickel hydroxide particles / metal cobalt particles / Y 2 O 3 particles / acrylic resin binder / carboxymethyl cellulose.
  • the basis weight of the positive electrode active material layer was 27.8 mg / cm 2 .
  • the density of the positive electrode active material layer was 3.2 g / cm 3 .
  • the thickness of the nickel foil, the thickness of the positive electrode active material layer, and the total thickness of the current collector and the positive electrode active material layer were 20 ⁇ m, 88 ⁇ m, and 108 ⁇ m, respectively.
  • the blending weight ratio of the negative electrode active material layer was 97.3 / 2 / 0.7 in A2B7 type hydrogen storage alloy particles / acrylic binder / carboxymethylcellulose.
  • the basis weight of the negative electrode active material layer is 28.8 mg / cm 2
  • the density of the negative electrode active material layer is 5.3 g / cm 3
  • the thickness of the nickel foil, the thickness of the negative electrode active material layer, the current collector and the negative electrode active material layer The total thickness was 10 ⁇ m, 58 ⁇ m and 68 ⁇ m, respectively.
  • N / P is 1.4.
  • An electrode structure was obtained by laminating a positive electrode and a negative electrode with a separator having a thickness of 90 ⁇ m without a compressive stress (53% porosity) in between.
  • the electrode structure is put into the case, and 5.5M KOH + 0.5M NaOH + 0.5M LiOH is supplied as an electrolyte, and then the electrode structure is formed in the thickness direction by a compression force applying mechanism as shown in FIG.
  • a nickel metal hydride battery was obtained by sandwiching.
  • Example 1 Comparative Example 1 except that a porous nickel foil is used as the current collector for the positive electrode, the positive electrode active material is held in the pores in the current collector, and the positive electrode active material layer is not provided on the current collector (outside). And the same.
  • the thickness of the porous nickel foil was 87 ⁇ m.
  • Example 2 A porous nickel foil is used as the current collector for the positive electrode, the positive electrode active material is held in the pores in the current collector, the positive electrode active material is not provided on the current collector (outside), and the compressive force is The same as Example 1 except that the thickness of the separator in the absence was 200 ⁇ m. The thickness of the porous nickel foil was 87 ⁇ m.
  • SYMBOLS 10 Nickel metal hydride battery, 12 ... Bipolar electrode, 14 ... Separator, 16 ... Current collector, 16a ... One side of current collector, 16b ... The other side of current collector, 18 ... Positive electrode active material layer, 20 ... Negative electrode active material layer, 25 ... electrode structure, 30 ... positive electrode termination electrode, 40 ... negative electrode termination electrode, 50 ... constraining body, 60 ... spacer, 65 ... case, 70 ... compression force applying mechanism.

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne une batterie au nickel-hydrogène 10 pourvue : d'une structure d'électrode 25 qui comprend séquentiellement un collecteur 16, une couche de matériau actif d'électrode positive 18, un séparateur 14, une couche de matériau actif d'électrode négative 20 et un collecteur 16 dans cet ordre ; et un mécanisme d'application de force de compression 70 qui applique une force de compression à la structure d'électrode 25 dans la direction de l'épaisseur de la structure d'électrode. La couche de matériau actif d'électrode positive 18 contient de l'hydroxyde de nickel. La couche de matériau actif d'électrode négative 20 contient un alliage de stockage d'hydrogène. L'épaisseur du séparateur 14 sous la force de compression est de 50 à 80 µm.
PCT/JP2018/001191 2017-02-09 2018-01-17 Batterie au nickel-hydrogène Ceased WO2018147019A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-022452 2017-02-09
JP2017022452A JP2020064702A (ja) 2017-02-09 2017-02-09 ニッケル水素電池

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WO2018147019A1 true WO2018147019A1 (fr) 2018-08-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020087613A (ja) * 2018-11-20 2020-06-04 株式会社豊田自動織機 電極の製造方法

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JPH0495341A (ja) * 1990-07-31 1992-03-27 Shin Kobe Electric Mach Co Ltd 密閉形集合電池
JPH09503618A (ja) * 1993-10-08 1997-04-08 エレクトロ エナジー，インコーポレイティド 積層体ウェーハセルの双極電気化学電池
JP3072141U (ja) * 2000-03-14 2000-10-06 ホップエッケ バテリー システーメ ゲーエムベーハー ニッケル−カドミウム電池の電極系
US20010008724A1 (en) * 1998-02-06 2001-07-19 Detlef Ohms Electrode system for nickel-cadmium batteries and procedure for its manufacture
JP2003317694A (ja) * 2002-04-25 2003-11-07 Matsushita Electric Ind Co Ltd ニッケル水素蓄電池
JP2004296240A (ja) * 2003-03-26 2004-10-21 Sanyo Electric Co Ltd ニッケル水素二次電池及びニッケル水素二次電池の製造方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6050869A (ja) * 1983-08-24 1985-03-20 イ−グル−ピツチヤ−　インダストリ−ズ，インコ−ポレ−テツド 金属・ガス電池
JPH0495341A (ja) * 1990-07-31 1992-03-27 Shin Kobe Electric Mach Co Ltd 密閉形集合電池
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Publication number Priority date Publication date Assignee Title
JP2020087613A (ja) * 2018-11-20 2020-06-04 株式会社豊田自動織機 電極の製造方法
JP7151408B2 (ja) 2018-11-20 2022-10-12 株式会社豊田自動織機 電極の製造方法

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