CN104979537B - The manufacture method of hydrogen bearing alloy, nickel-hydrogen accumulator and hydrogen bearing alloy - Google Patents
The manufacture method of hydrogen bearing alloy, nickel-hydrogen accumulator and hydrogen bearing alloy Download PDFInfo
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- CN104979537B CN104979537B CN201510089793.3A CN201510089793A CN104979537B CN 104979537 B CN104979537 B CN 104979537B CN 201510089793 A CN201510089793 A CN 201510089793A CN 104979537 B CN104979537 B CN 104979537B
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/383—Hydrogen absorbing alloys
- H01M4/385—Hydrogen absorbing alloys of the type LaNi5
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
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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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- 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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- Electric Propulsion And Braking For Vehicles (AREA)
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Abstract
The present invention provides a kind of hydrogen bearing alloy for the high electric power output characteristic for being able to maintain that nickel-hydrogen accumulator, has the hydrogen bearing alloy as the nickel-hydrogen accumulator of negative electrode and the manufacture method of hydrogen bearing alloy.Hydrogen bearing alloy is one kind by AB5The hydrogen bearing alloy that type alloy is formed.The main component of element A is rare earth element, and B element is using nickel as main component and contains at least one party in aluminium and manganese.Moreover, in the section of the hydrogen bearing alloy, the ratio existing for aluminium and manganese rather high concentration shared by region is more than 0.5%.In addition, the present invention is using negative electrode of this hydrogen bearing alloy as nickel-hydrogen accumulator.
Description
Technical field
The present invention relates to a kind of hydrogen bearing alloy, there is the hydrogen bearing alloy as the nickel-hydrogen accumulator of negative electrode and storage
The manufacture method of hydrogen alloy.
Background technology
Typically, nickel-hydrogen accumulator has high-energy-density and excellent reliability, and it is as mobile unit, Portable
The power supply of device etc. or power supply for electric automobile, hybrid vehicle are widely used.Nickel-hydrogen accumulator is made by nickel hydroxide
For the positive pole of main component, negative pole of the hydrogen bearing alloy as main component and the alkaline electrolyte structure comprising potassium hydroxide etc.
Into.
The hydrogen bearing alloy of this negative pole for forming nickel-hydrogen accumulator dilation repeatedly in circulation is released in the absorption of hydrogen,
So as to cause the generation of micronizing.Micronizing is particularly easy to produce when being segregated.Segregation is that a kind of hydrogen storage that forms is closed
The intermetallic compound of gold or the uneven phenomenon of concentration distribution of metallic element.Hydrogen bearing alloy is when micronizing occurs
Wait, with the increase of its surface area, the corrosion caused by alkaline electrolyte is promoted so as to cause its life-span to reduce.Namely
Say, the segregation of hydrogen bearing alloy be cause the cycle life of nickel-hydrogen accumulator to reduce one will be because.Then, one kind is proposed in the past
Technical scheme, micronizing is set to be difficult to occur by suppressing the segregation of hydrogen bearing alloy, so as to improve hydrogen bearing alloy to alkaline electrolysis
The corrosion resistance (such as, with reference to patent document 1) of liquid.
Patent document 1：Japanese Unexamined Patent Publication 5-156382 publications
However, micronizing is set to be difficult in the case of occurring in order to improve the corrosion resistance of hydrogen bearing alloy, along with hydrogen storage
The increase of surface area is suppressed caused by the micronizing of alloy.Therefore, the nickel that is played a role as catalyst exposes area
Increase is suppressed, and in the case of for nickel-hydrogen accumulator, can not fully obtain the electric power output characteristic of nickel-hydrogen accumulator sometimes.
In addition, if the corrosion of hydrogen bearing alloy is suppressed, the dissolving of the composition beyond the nickel to be played a role in hydrogen bearing alloy as catalyst
It is suppressed.Therefore, the increase for exposing area of nickel is suppressed, at this point, in the case of being used for nickel-hydrogen accumulator, sometimes not
The electric power output characteristic of nickel-hydrogen accumulator can fully be obtained.
In addition, high-load range of the in general electric product in battery, for example, the use range of charge rate be 0% it is attached
Closely or near 100% used.Micronizing, corrosion are easily produced near 0% or near 100%, so above-mentioned ask
Topic is difficult to produce.But applied to hybrid vehicle (including plug-in hybrid-power automobile) in the case of, charge rate makes
It is 20%~80% with scope, so micronizing corrosion is difficult to produce, so as to cause above mentioned problem easily to produce.
The content of the invention
The present invention be in view of above-mentioned truth is made, its object is to provide it is a kind of can be defeated by the electric power of nickel-hydrogen accumulator
Go out hydrogen bearing alloy that characteristic maintains higher, there is nickel-hydrogen accumulator and hydrogen storage conjunction of the hydrogen bearing alloy as negative electrode
The manufacture method of gold.
The hydrogen bearing alloy for solving above-mentioned problem is one kind by AB5The hydrogen bearing alloy that type alloy is formed.The main component of element A
For rare earth element, B element is using nickel as main component and containing at least one party in aluminium and manganese, in cutting for the hydrogen bearing alloy
In face, the ratio existing for aluminium and manganese rather high concentration ground shared by region is more than 0.5%.
According to said structure, in the section of the hydrogen bearing alloy, region institute existing for aluminium and manganese rather high concentration ground
The ratio accounted for is moderately ensured.Therefore, the increase of surface area is caused with the micronizing of hydrogen bearing alloy, so as to employ
The electric power output characteristic of the nickel-hydrogen accumulator of hydrogen bearing alloy improves.
The nickel-hydrogen accumulator for solving above-mentioned problem be it is a kind of there is nickel-hydrogen accumulator of the hydrogen bearing alloy as negative electrode, its
Using the hydrogen bearing alloy of above-mentioned composition as the hydrogen bearing alloy.
According to said structure, using the negative electrode of the easy hydrogen bearing alloy for producing micronizing corrosion, so as to carry
The electric power output characteristic of high nickel-hydrogen accumulator.
The manufacture method for solving the hydrogen bearing alloy of above-mentioned problem is one kind by AB5The manufacture for the hydrogen bearing alloy that type alloy is formed
Method.The manufacture method includes：Prepare the preparatory process of feedstock composition, contain in the feedstock composition according to predetermined component
Rare earth element as the main component of element A, as B element main component nickel and as form B element into
At least one party in the aluminium and manganese that divide；And the generation process of generation hydrogen bearing alloy, to being ready in the preparatory process
The feedstock composition handled using melting and sharp cooling, so as to generate aluminium and manganese in the section of the hydrogen bearing alloy
The hydrogen bearing alloy that ratio existing for rather high concentration ground shared by region is more than 0.5%.
According to above-mentioned manufacture method, it is possible to increase employ the electric power output characteristic of the nickel-hydrogen accumulator of hydrogen bearing alloy.
By means of the invention it is possible to maintain the high electric power output characteristic of nickel-hydrogen accumulator.
Brief description of the drawings
Fig. 1 is the segregation rate and -30 of the aluminium and manganese in a kind of hydrogen bearing alloy for the embodiment for representing nickel-hydrogen accumulator
The curve map of the dependency relation between DC-IR (direct current internal resistance value) at DEG C.
Description of reference numerals
L ... curve of approximation, P1, P2, P3, P4 ... measuring point.
Embodiment
Hereinafter, a kind of embodiment of nickel-hydrogen accumulator is illustrated.
Nickel-hydrogen accumulator is a kind of enclosed-type battery, is moved in the mixing of 2 power sources with engine and motor
In power automobile, nickel-hydrogen accumulator is used as the power supply of drive motor.The nickel-hydrogen accumulator possesses electrode group, electrode group
Such as by by the positive plate of the negative plate of predetermined number that composition is hydrogen bearing alloy and predetermined number that composition is nickel hydroxide
Lamination is carried out across the dividing plate that the non-woven fabrics by alkali resistance resin is formed and is formed.The electrode group is connected to collector plate, with master
The electrolyte for wanting composition to be potassium hydroxide is incorporated in the electric groove of resin-made together.In this way, nickel-hydrogen accumulator obtains
To be formed.
Then, the hydrogen bearing alloy for negative plate is illustrated.
Hydrogen bearing alloy has AB5The crystalline texture of type.In the present embodiment, hydrogen bearing alloy is configured to, with MmNi5(Mm：
Norium) it is prototype, wherein, Ni (nickel) part is substituted by other elements.Norium be La (lanthanum) with
And the alloy of the rare earth element such as Ce (cerium).As substitution Ni element, can use for example from Co (cobalt), Mn (manganese), Fe
At least one element of selection in (iron), Cu (copper), Ti (titanium)., can be with as hydrogen bearing alloy in addition, in the present embodiment
Using alloy comprising Mm, Ni, Co, Al and Mn etc..
[embodiment]
Hereinafter, embodiment is described in detail.In this embodiment, ni-mh electric power storage is made under the following conditions
Pond, and its characteristic is evaluated.
Hydrogen bearing alloy is made in accordance with the following methods.First, prepare rare earth element, prepared group of the lanthanides member in more detail
The mixture alloy of element and the norium that is formed.Rare earth element is La, Ce, Pr (praseodymium), Nd (neodymium), Sm (samarium)
Deng.Then, as preparatory process, prepare with Ni, Co, Mn and Al to be mixed the norium according to predetermined component
The feedstock composition for closing and being formed.In addition, as generation process, handled by melting and sharp cooling and closed so as to generate hydrogen storage
Gold.Melting and sharp cooling is after ready feedstock composition is melted, with more than 1000 DEG C/sec cooling velocities, will to melt
The method that thing solidifies from molten condition.In this case, by the way that the feedstock composition of melting is quickly cooled down, so as to generation group
Into the less hydrogen bearing alloy of distribution bias of composition.In addition, by adjusting the weight of Al and Mn relative to whole hydrogen bearing alloy
Than, so as to control in the section of hydrogen bearing alloy, Al and Mn to be segregated and rather high concentration ground existing for shared by section parts
Ratio.Then, the hydrogen bearing alloy of generation is crushed using ball mill, makes hydrogen-bearing alloy powder.
Then, after hydrogen-bearing alloy powder being immersed in alkaline aqueous solution and is stirred, washed and dried.This
Outside, poly-vinyl alcohol solution is added in hydrogen-bearing alloy powder after the drying to be kneaded and make slurry.Then, the slurry is applied
Cloth is dried, rolls and cut off, so as to make negative plate on punch metal.
On positive plate, after main component is filled in foaming nickel substrate as the active material slurry of nickel hydroxide, carry out
Dry, roll and cut off, so as to make positive plate.Then, by above-mentioned positive plate and negative plate across by alkali resistance resin
Non-woven fabrics form dividing plate lamination multiple, be accommodated in electricity together with alkaline electrolyte of the potassium hydroxide (KOH) as main component
In groove, so as to make nickel-hydrogen accumulator.
(relative to the assay method of the internal resistance value (DC-IR) of direct current)
First, at normal temperatures, nickel-hydrogen accumulator is charged, makes its charge rate (SOC：State Of Charge) reach
Untill 60%.Then, untill nickel-hydrogen accumulator being cooled into -30 DEG C.Then, using under constant current value put within 5 seconds
Voltage drop (Δ V) when electric, the direct current internal resistance value (DC-IR) of nickel-hydrogen accumulator is calculated by " Δ V/ current values ".
(assay method of the segregation rate of Al and Mn in hydrogen bearing alloy)
The segregation rate X of Al and Mn in hydrogen bearing alloy are used by electron probe microanalyzer (EPMA) predetermined
Under conditions of the Elemental redistribution that is determined calculated.The measure of Elemental redistribution is to use electron probe microanalyzer JXA-
8100 (JEOL's systems).In addition, in the present embodiment, using accelerating potential=15kV, μ A of irradiation electric current=0.1, observation times
Rate=400 times are as predetermined condition.Then, under conditions of this is predetermined, the intrinsic X of Al are detected from the section of hydrogen bearing alloy
The strength signal of line.In the case where the value of the strength signal is more than 60CPS, it is judged as in above-mentioned section parts that Al occurs inclined
Analysis and concentration is of a relatively high.In addition, under conditions of this is predetermined, the strong of the intrinsic x-rays of Mn is detected from the section of hydrogen bearing alloy
Spend signal.In the case where the value of the strength signal is more than 20CPS, it is judged as in above-mentioned section parts that segregation occurs for Mn and dense
Spend of a relatively high.Then, in the section of hydrogen bearing alloy, be judged as Al occur segregation and rather high concentration ground existing for section
The ratio at position and be judged as Mn to occur segregation and rather high concentration ground existing for section parts ratio aggregate value as inclined
Analysis rate X is measured.
In addition, above-mentioned 60CPS and 20CPS value is set to detect more than 2 times of the average level in alloy section
Value when value.That is, " region existing for rather high concentration ground " so-called in claim is to represent Al or Mn to close
Region existing for more than 2 times of concentration of the overall mean concentration in golden section.
Al or Mn concentration is preferably less than 4 times of the overall mean concentration in alloy section.This is due to dense more than average
Degree 4 times when, concentration distribution will become uneven reason.The EPMA values of concentration of 4 times more than mean concentration, in Al situation
Under be expressed as value more than 87CPS, the value more than 57CPS is expressed as in the case of Mn, but in the present embodiment, is not present
Represent the region of this sample value.
Segregation rate X can be adjusted by the Al in alloy and Mn ratio.That is, by increase Al and
It Mn ratio, can be increased segregation rate X.
During using being divided into N number of (the present embodiment is 9) region as section of the hydrogen bearing alloy of measure object etc., each region
In Al and Mn occur segregation and rather high concentration ground existing for part area segregation rate of the ratio as regional
X1~XN is calculated.Segregation rate X1~XN standard deviation δ X relative to segregation rate X1~XN average value ratio conduct
Segregation deviation (coefficient of alteration) Xr is calculated.Segregation deviation Xr can be adjusted by the molten soup speed of melting and sharp cooling.
I.e. it is capable to reduce segregation deviation Xr by slowing down molten soup speed.
(measurement result)
On the nickel-hydrogen accumulator of the present embodiment, Fig. 1 is the segregation rate and DC-IR for representing aluminium and manganese in hydrogen bearing alloy
Measurement result between corresponding relation.
As shown in figure 1, in the present embodiment, on the corresponding relation between Al and Mn segregation rate and DC-IR, to 4
Individual measuring point P1, P2, P3, P4 are measured.Each measuring point P1, P2, P3, P4 segregation rate and DC-IR value, according to segregation
The low measuring point of rate order arrangement, respectively P1 (0.2,20.5), P2 (0.6,19.0), P3 (1.2,18.6), P4 (2.8,
18.2).Then, according to these measuring points P1, P2, P3, P4, the segregation rate and DC- of the nickel-hydrogen accumulator to representing the present embodiment
The curve of approximation L of dependency relation between IR is calculated.
In the present embodiment, can be grasped according to curve of approximation L, during scope of the segregation rate more than 0.5%, DC-IR is
19.5m below Ω.It is suitable as the output characteristics required by hybrid vehicle in the case where DC-IR is below 19.5m Ω
Suitable.In addition, in each measuring point P1, P2, P3, P4, segregation rate is more than 0.5% 3 measuring points P2, P3, P4 DC-IR
Value constant.In contrast to this, measuring point P1 of the segregation rate less than 0.5% DC-IR value deviates considerably from it
His measuring point P2, P3, P4 DC-IR value.
In the present embodiment, the scope for ranging preferably from less than 4% of the value of the segregation rate of hydrogen bearing alloy.The value of segregation rate
During more than 4%, Al, Mn are easily corroded.In this case, Al, Mn dissolution and separate out, the situation applied to nickel-hydrogen accumulator
Under be likely to occur short circuit, so bad.Therefore, by applying certain limit to the corrosion easness in this hydrogen bearing alloy
System, so as to realize that hydrogen bearing alloy is defeated relative to the corrosion resistance of electrolyte and using the electric power of the nickel-hydrogen accumulator of hydrogen bearing alloy
Go out characteristic.
In the present embodiment, 4 measuring points P1, P2, P3, P4 segregation deviation Xr value, according to the low measure of segregation rate
The order arrangement of point, respectively P1 (100%), P2 (68%), P3 (59%), P4 (24%).That is, whole measuring point
P1, P2, P3, P4 segregation deviation Xr value are set as less than 100%.Therefore, by ensuring Al and Mn in hydrogen bearing alloy
Distribution uniformity so that caused deviation is suppressed in the characteristic.Particularly, the measuring point P2, P3 of the present embodiment,
P4 segregation deviation Xr value is set as less than 70%.Therefore, by further ensuring that Al in hydrogen bearing alloy and Mn point
The uniformity of cloth, so as to which caused deviation is suppressed in the characteristic.
Then, the effect to above-mentioned nickel-hydrogen accumulator illustrates.
On hydrogen bearing alloy, Al and Mn segregation rate X are higher, micronizing and the easier generation of corrosion.Therefore, it is adjoint
The increase for exposing area of the Ni relative to electrolyte, reaction speed improves.As a result, the ni-mh for employing hydrogen bearing alloy stores
The electric power output characteristic of battery improves, and the DC-IR of nickel-hydrogen accumulator value declines.According to the ni-mh employed in above-described embodiment
Battery, have confirmed that, when the Al in hydrogen bearing alloy and Mn segregation rate X is more than 0.5% scope, DC-IR is
19.5m below Ω.Therefore, when nickel-hydrogen accumulator is equipped on hybrid vehicle, the segregation of Al and Mn in hydrogen bearing alloy
In the case that rate is more than 0.5% scope, the electric power output for the nickel-hydrogen accumulator for employing hydrogen bearing alloy can be fully obtained
Characteristic.
On hydrogen bearing alloy, Al and Mn segregation rate X are higher, are more difficult to ensure that Al and Mn distributing homogeneity, from
And the characteristic easily produces deviation.According to the nickel-hydrogen accumulator employed in above-described embodiment, have confirmed that, in hydrogen bearing alloy
Al and Mn segregation deviation Xr value be set in the case of less than 100%, that is to say, that by the section of hydrogen bearing alloy
When being divided into multiple, the ratio in region existing for Al the and Mn rather high concentrations ground in each region is segregation rate X1~XN mark
In the case that quasi- deviation δ X are smaller than segregation rate X1~XN average value, the electric power output of the nickel-hydrogen accumulator of hydrogen bearing alloy is employed
Stability of characteristics.Therefore, in the case that the Al in hydrogen bearing alloy and Mn segregation deviation Xr is less than 100% scope, energy
The reliability of enough electric power output characteristics for fully obtaining the nickel-hydrogen accumulator on employing hydrogen bearing alloy.It is inclined by setting segregation
Poor Xr is less than 70%, so as to will more fully obtain the reliability of above-mentioned output characteristics.
Generally, when nickel-hydrogen accumulator is mounted on hybrid vehicle, the use range of the charge rate of nickel-hydrogen accumulator is received
Hold back in 20%~80%, this is related to the 0% in general electric product nearby and near 100% different from the use of scope.Hydrogen storage is closed
The micronizing corrosion of gold, it occurs mainly in charge rate for 0% nearby or near 100%, that is, for battery,
The bigger environment of load, so in the use range of above-mentioned charge rate, it is difficult to the micronizing and corrosion of hydrogen bearing alloy occurs.
At this point, according to the nickel-hydrogen accumulator employed in above-described embodiment, the Al in hydrogen bearing alloy and Mn segregation rate is set
For more than 0.5% scope, so as to improve the electric power output characteristic for the nickel-hydrogen accumulator for having used the hydrogen bearing alloy.Therefore, i.e.,
Make in the case where the use range of charge rate converges on 20%~80%, also fully can obtain employing the nickel of hydrogen bearing alloy
The electric power output characteristic of H accumulator.In addition, the charge rate of the nickel-hydrogen accumulator carried on hybrid vehicle 20%~
80% scope is to prevent overcharge overdischarge by use.
It is described above, according to the nickel-hydrogen accumulator of above-mentioned embodiment, effect as shown below can be obtained.
(1) because the Al in hydrogen bearing alloy and Mn segregation rate X is set as more than 0.5% scope, so in hydrogen storage
In the section of alloy, the ratio existing for Al and Mn rather high concentrations ground shared by region is suitably ensured.Therefore, it is adjoint
The micronizing of hydrogen bearing alloy and increase surface area, so as to improve the electric power output for the nickel-hydrogen accumulator for employing hydrogen bearing alloy spy
Property.
(2) Al in hydrogen bearing alloy and Mn segregation rate X is set as less than 4.0% scope.Therefore, by hydrogen storage
Corrosion easness applies certain limitation caused by alloy, so as to realize hydrogen bearing alloy relative to the corrosion resistance of electrolyte with
And employ the electric power output characteristic of the nickel-hydrogen accumulator of hydrogen bearing alloy.
(3) because the Al in hydrogen bearing alloy and Mn segregation deviation Xr value is set as less than 100%, so in hydrogen storage
In the section of alloy, the phenomenon of at least one party in Al and Mn partial velocities in cross section is suppressed.Therefore, it is possible to promote companion
With the increase of micronizing, the more stable surface area in hydrogen bearing alloy.
(4) by with the negative electrode for employing the hydrogen bearing alloy for easily producing micronizing corrosion, it is possible to increase nickel
The electric power output characteristic of H accumulator.
(5) nickel-hydrogen accumulator is mounted in using internal combustion engine and motor as on the hybrid vehicle of driving source, is used for
Supply electrical power to motor.Therefore, it is possible to keep the supply electric power of the motor to the driving source as hybrid vehicle
While reliability, it is possible to increase its output characteristics.
(6) even in the charge rate of nickel-hydrogen accumulator use range converge on hydrogen bearing alloy micronizing corrosion be difficult to
Under conditions of 20%~80% scope occurred, it still is able to suitably realize the motor improved to the driving source as vehicle
The composition of the output characteristics of the electric power of supply.
(7) by carrying out melting and sharp cooling processing to the feedstock composition for containing Al and Mn with predetermined component, so as to
The hydrogen bearing alloy that enough uniformities for obtaining the distribution that segregation deviation Xr is less than 100%, Al and Mn are ensured.Accordingly, it is capable to
It is enough that the output characteristics of nickel-hydrogen accumulator is positively increased by the micronizing corrosion of hydrogen bearing alloy.
In addition, above-mentioned embodiment can also be implemented by following this mode.
In the above-described embodiment, by the section of hydrogen bearing alloy, Al generations segregation existing for rather high concentration ground
The ratio and Mn of section parts occur segregation and rather high concentration ground existing for the aggregate values of ratio of section parts be defined as partially
Analysis rate X.But in the case of either party element during hydrogen bearing alloy only includes Al and Mn, by the section of hydrogen bearing alloy
In, in Al and Mn either party element occur segregation and rather high concentration ground existing for the ratios of section parts be defined as
Segregation rate, the value of the segregation rate can also be set as more than 0.5% scope.Even if in this case, also can be suitably true
Protect the ratio in region existing in the section of hydrogen bearing alloy, Al or Mn rather high concentrations ground.Therefore, with hydrogen bearing alloy
Micronizing make the increase of surface area, so as to improve the electric power output characteristic for the nickel-hydrogen accumulator for employing hydrogen bearing alloy.
Claims (5)
1. a kind of nickel-hydrogen accumulator, there is hydrogen bearing alloy as negative electrode, the hydrogen bearing alloy is by AB5Type alloy is formed, and it is special
Sign is,
The main component of element A is rare earth element, and B element is using nickel as main component and contains at least one in aluminium and manganese
Side,
In the section of the hydrogen bearing alloy, the ratio existing for aluminium and manganese the rather high concentration ground shared by region is
More than 0.5%, region existing for the aluminium described in the section of the hydrogen bearing alloy and manganese rather high concentration ground is represented to close
Region existing for more than 2 times of concentration of the overall mean concentration in golden section,
The nickel-hydrogen accumulator is mounted in using internal combustion engine and motor as on the hybrid vehicle of driving source, for providing
Electric power gives the motor,
The nickel-hydrogen accumulator uses in the range of being 20%~80% in charge rate.
2. nickel-hydrogen accumulator according to claim 1, in the section of the hydrogen bearing alloy, the aluminium and manganese are relatively high
Ratio existing for concentration ground shared by region is less than 4.0%.
3. nickel-hydrogen accumulator according to claim 1 or 2, the hydrogen bearing alloy contains the both sides of aluminium and manganese.
4. nickel-hydrogen accumulator according to claim 1 or 2, in the case that the section is divided into multiple regions, each area
The standard deviation of ratio existing for aluminium and manganese rather high concentration ground in domain shared by region is less than the average value of the ratio.
5. a kind of manufacture method of hydrogen bearing alloy, the hydrogen bearing alloy use as the negative electrode of nickel-hydrogen accumulator, the hydrogen storage is closed
Gold is by AB5Type alloy is formed,
The manufacture method includes：
Prepare the preparatory process of feedstock composition, contain in the feedstock composition according to predetermined component as the main of element A
In the rare earth element of composition, the nickel of main component as B element and the aluminium and manganese as the composition for forming B element
At least one party；And
The generation process of hydrogen bearing alloy is generated, to the ready feedstock composition use melting urgency in the preparatory process
Cold process is handled, so as to generate in the section of the hydrogen bearing alloy shared by region existing for aluminium and manganese rather high concentration ground
Ratio be more than 0.5% hydrogen bearing alloy, exist aluminium described in the section of the hydrogen bearing alloy and manganese rather high concentration
Region be to represent with region existing for more than 2 times of concentration of the overall mean concentration in alloy section.
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| JP2014-081593 | 2014-04-11 | ||
| JP2014081593A JP2015203119A (en) | 2014-04-11 | 2014-04-11 | Hydrogen storage alloy, nickel hydrogen storage battery and production method of hydrogen storage alloy |
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| CN104979537A CN104979537A (en) | 2015-10-14 |
| CN104979537B true CN104979537B (en) | 2018-04-10 |
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| JP3101287B2 (en) * | 1990-01-25 | 2000-10-23 | 三洋電機株式会社 | Method for producing hydrogen storage alloy for alkaline storage battery |
| JP3668501B2 (en) * | 1992-09-14 | 2005-07-06 | 株式会社東芝 | Hydrogen storage alloy for batteries and nickel metal hydride secondary battery |
| JP3432866B2 (en) * | 1993-08-02 | 2003-08-04 | 三洋電機株式会社 | Hydrogen storage alloy electrodes for alkaline storage batteries |
| JPH09209065A (en) * | 1994-11-07 | 1997-08-12 | Santoku Kinzoku Kogyo Kk | Age precipitation type rare earth metal-nickel alloy, its production, and nickel-hydrogen secondary battery negative pole |
| CN1050154C (en) * | 1996-07-11 | 2000-03-08 | 南开大学 | Spherical hydrogen-storage alloy and mfg. method thereof |
| JPH10284071A (en) * | 1997-04-02 | 1998-10-23 | Sanyo Electric Co Ltd | Sintered hydrogen storage alloy electrode |
| JP3992075B1 (en) * | 2007-01-30 | 2007-10-17 | 中央電気工業株式会社 | Hydrogen storage alloy and electrode for nickel-hydrogen battery |
| JP4337905B2 (en) * | 2007-04-18 | 2009-09-30 | トヨタ自動車株式会社 | Cooling device for electric equipment mounted on vehicle |
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