JPH0465067A - Formation method of nickel-hydrogen battery - Google Patents
Formation method of nickel-hydrogen batteryInfo
- Publication number
- JPH0465067A JPH0465067A JP2174737A JP17473790A JPH0465067A JP H0465067 A JPH0465067 A JP H0465067A JP 2174737 A JP2174737 A JP 2174737A JP 17473790 A JP17473790 A JP 17473790A JP H0465067 A JPH0465067 A JP H0465067A
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen storage
- nickel
- battery
- charging
- discharging
- 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.)
- Granted
Links
- 239000001257 hydrogen Substances 0.000 title claims abstract description 33
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 33
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 14
- 238000003860 storage Methods 0.000 claims abstract description 31
- 239000000956 alloy Substances 0.000 claims abstract description 25
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 24
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 22
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000007599 discharging Methods 0.000 claims abstract description 10
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 10
- 229910003126 Zr–Ni Inorganic materials 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims description 9
- 239000003792 electrolyte Substances 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims 1
- 239000008151 electrolyte solution Substances 0.000 abstract description 2
- 239000011232 storage material Substances 0.000 abstract 2
- 229910001068 laves phase Inorganic materials 0.000 abstract 1
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- 229910052987 metal hydride Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- -1 that is Inorganic materials 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000018199 S phase Effects 0.000 description 1
- 229910008340 ZrNi Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000004681 metal hydrides Chemical class 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明ζよ ニッケル−水素蓄電池用など、水素吸蔵合
金を負極に用いた蓄電池に関する。DETAILED DESCRIPTION OF THE INVENTION Industrial Field of Application The present invention relates to a storage battery using a hydrogen storage alloy as a negative electrode, such as a nickel-hydrogen storage battery.
従来の技術
各種の電源として広く使われている蓄電池として鉛蓄電
池とアルカリ蓄電池があム このうちアルカリ蓄電池は
高信頼性が期待でき、小形軽量化も可能などの理由で小
形は各種ポータプル機器用に 大形は産業用として使わ
れてきた
このアルカリ蓄電池において正極としてζよ はとんど
の場合ニッケル極であム ポケット式から焼結式に代わ
って特性が向上Ｌ さらに密閉化が可能になるとともに
用途も広がっ九
一方負極としては現在のところカドミウム極が主体であ
るが一層の高エネルギー密度を達成するために金属水素
化物つまり水素吸蔵合金極を使ったニッケル−水素蓄電
池が注目され製法などに多くの提案がされていも
発明が解決しようとする課題
水素吸蔵合金極の製法としては合金粉末を焼結する方式
と発泡状 繊維状、パンチングメタルなどの多孔体に充
填や塗着する方式のペースト式があも 水素吸蔵合金は
カドミウム極などと同様に電子伝導性の点で比較的硬れ
ているので非焼結成極の可能性は太きＬ％ すなわち
水素吸蔵合金粉末を結着剤とともにペースト状としこれ
を３次元あるいは２次元構造の多孔性導電板に充填ある
いは塗着していも しかし いずれにしてもとくに充放
電サイクルの初期での放電特性の上で改良の余地があム
とくに水素吸蔵合金としてＺｒ−Ｎｉをベースとする
ＡＢ２Ｌａｖｅｓ相を含む合金では最終的には高容量に
なるが初期の活性化が問題であ４ 本発明はこのような
問題を解決するもので、初期から優れた特性を示すニッ
ケル−水素蓄電池の化成法を提供することを目的とすム
課題を解決するための手段
この課題を解決するため本発明のニッケル−水素蓄電池
の化成法（ｉ ニッケル正極と水素吸蔵合金負極とセパ
レータを用いて電池を構成し電槽に挿入 電解液を注入
後にそのまままたは密閉形として低温度で充電し 高温
度で放電する化成を行なう。この場合充電が０〜１０℃
の低温で、放電が４０〜６０℃の高温であることが好ま
しｌ、■ この場合負極に使用する水素吸蔵合金とし
てＺｒＮｉをベースとするＡＢ２Ｌａｖｅｓ相を含む合
金を用いるものである。Conventional technology Lead-acid batteries and alkaline batteries are widely used as storage batteries for various power sources. Of these, alkaline storage batteries are expected to have high reliability and can be made smaller and lighter, so the smaller ones are used for various portable devices. In this alkaline storage battery, the large size has been used for industrial purposes, the positive electrode is usually a nickel electrode.Characteristics have been improved by replacing the pocket type with a sintered type. Currently, cadmium electrodes are the main negative electrodes, but nickel-hydrogen storage batteries that use metal hydrides, that is, hydrogen storage alloy electrodes, are attracting attention in order to achieve even higher energy densities, and their manufacturing methods are increasing. However, there are two methods for producing hydrogen storage alloy electrodes: one is a method of sintering alloy powder, and the other is a paste method, which is a method of filling or coating a porous body such as foam, fiber, or punched metal. Aamo: Like cadmium electrodes, hydrogen storage alloys are relatively hard in terms of electronic conductivity, so the possibility of non-sintered electrodes is large. Even if this is filled or painted into a porous conductive plate with a three-dimensional or two-dimensional structure, there is still room for improvement in terms of discharge characteristics, especially at the beginning of the charge/discharge cycle.Especially hydrogen storage alloys The alloy containing the AB2Laves phase based on Zr-Ni ultimately has a high capacity, but the initial activation is a problem.4 The present invention solves this problem, and provides excellent characteristics from the beginning. An object of the present invention is to provide a method for chemically forming a nickel-hydrogen storage battery that exhibits Construct a battery using a separator and insert it into a battery case. After injecting the electrolyte, charge at a low temperature as it is or in a sealed form, and perform chemical formation by discharging at a high temperature. In this case, charging is performed at 0 to 10℃.
It is preferable that the discharge be at a low temperature of 40 to 60 DEG C. (1) In this case, the hydrogen storage alloy used for the negative electrode is an alloy containing an AB2Laves phase based on ZrNi.
作用
この構成により本発明のニッケル−水素蓄電池の化成法
（友 水素吸蔵合金粉末とくにＺｒ−Ｎｉをベースとす
るＡＢ２Ｌａｖｅｓ相を含む合金は最終的には高容量に
なるが初期の容量が少な（−そこで化成が他の電池系具
Ｆに重要である。ところが一般の電池同様化成と１７で
単に緩充放電を繰り返すのみでは容量の増加の度合は比
較的小さく、本来の容量に達する迄には多くの充放電サ
イクルを必要とし九
それが本願の低温度で充電し 高温度で放電する化成を
行なし入 しかも好ましくは負極容量の３倍以上のよう
な大容量を充電することで改良が図られたことか収 ま
ず合金が電極として機能するためには充電での電極から
水素が発生する状態を長く保つほど効果的であることが
わかっｔミ しかも０〜１０℃の低温はど水素吸蔵合
金の充電効率は良好である。Effect This configuration allows the chemical formation method of nickel-hydrogen storage batteries of the present invention (friendliness).Hydrogen storage alloy powder, especially Zr-Ni based alloy containing AB2Laves phase, has a high capacity in the end but has a small initial capacity (- Therefore, chemical formation is important for other battery devices F.However, as with general batteries, if the chemical formation and 17 are simply repeated slow charging and discharging, the degree of increase in capacity will be relatively small, and it will take a long time to reach the original capacity. This can be improved by charging at a low temperature and discharging at a high temperature, as described in the present application, and by charging a large capacity, preferably three times or more the negative electrode capacity. First of all, in order for the alloy to function as an electrode, it was found that the longer the state in which hydrogen is generated from the electrode during charging is maintained, the more effective it is. Charging efficiency is good.
さらに他の電池同様に正極律則の電池構成にしていてＬ
負極の容量が不十分な化成時に常温の放電を入れると
負極律則になるのゑ これをできるだけ避けるために放
電では負極に有利な高温で行う。その結果負極律則にな
らず、従って化成時に合金にとって好ましくない酸化な
どを受けにくくなり長寿命になム
なお他の蓄電池の場合密閉形にｊ７て負極から水素を発
生させると触媒でも用いていないかぎり水素は吸収され
ないので電池内圧は上昇してしまう。Furthermore, like other batteries, the battery configuration is based on the positive polarity law.
If a normal temperature discharge is used during formation when the capacity of the negative electrode is insufficient, the negative electrode rule will occur.To avoid this as much as possible, the discharge is performed at a high temperature that is advantageous for the negative electrode. As a result, the negative electrode rule does not apply, and therefore the alloy is less susceptible to unfavorable oxidation during chemical formation, resulting in a long life.In the case of other storage batteries, if the hydrogen is generated from the negative electrode in a sealed type, it is not used as a catalyst. As long as hydrogen is not absorbed, the internal pressure of the battery increases.
ところが水素吸蔵合金とくにＺｒ−Ｎｉをベースとする
ＡＢｐＬａｖｅｓ相を含む合金は水素を吸蔵する能力と
水素と酸素とを水に戻す触媒能を初期から持っているの
で電池内圧が上昇してガス漏れなどが生ずることはなｔ
、％
実施例
以下本発明の一実施例のニッケル−水素蓄電池の化成法
について説明ずも 水素吸蔵合金としてＡＢｐＬａｖｅ
ｓ相合金の一つであるＺｒＭｎ５．ｓＣｒ ＠、２Ｎ
ｉ １．２を粉砕した後カルボキシメチルセルロース溶
液を加えて作ったべ〜ストを多孔度９５％厚さ１、 Ｏ
ｍｍの発泡状ニッケル板に充填し加圧して水素吸蔵合金
電極を得な 減圧で乾燥後５％のフッ素樹脂ディスバー
ジョンを添加し補強した この水素吸蔵合金電極を幅３
３ｍｍ、 長さ２１０ｍｍに裁断し、 リード板をス
ポット溶接により取り付けた
相手極として公知の発泡状ニッケル板 それに親水処理
ポリプロピレン不織布セパｌソータを用いて密閉形ニッ
ケル−水素蓄電池を構成し加 正極に対する負極の容量
を４Ａｈ（１４０％）としたその後比重１．２５の苛性
カリ水溶液に２５ｇ／ｌの水酸化リチウムを溶解した電
解液を注入１． ？、：。However, hydrogen storage alloys, especially Zr-Ni-based alloys containing the ABpLaves phase, have the ability to store hydrogen and the catalytic ability to return hydrogen and oxygen to water from the beginning, so the internal pressure of the battery increases and gas leaks occur. will not occur.
, % Example Hereinafter, there will be no explanation about the chemical formation method of a nickel-hydrogen storage battery according to an example of the present invention. ABpLave as a hydrogen storage alloy
ZrMn5. is one of the s-phase alloys. sCr @, 2N
After crushing i 1.2, a carboxymethyl cellulose solution was added to make a base with a porosity of 95% and a thickness of 1 O.
A hydrogen storage alloy electrode was obtained by filling a foamed nickel plate with a width of 3 mm and pressurizing it. After drying under reduced pressure, 5% fluororesin dispersion was added to reinforce this hydrogen storage alloy electrode.
A well-known foamed nickel plate was cut into pieces of 3 mm and 210 mm in length, and a lead plate was attached by spot welding.A sealed nickel-metal hydride storage battery was constructed using a well-known foamed nickel plate as a mating electrode and a hydrophilic treated polypropylene nonwoven fabric separator. After setting the capacity to 4Ah (140%), an electrolytic solution containing 25 g/l of lithium hydroxide dissolved in a caustic potassium aqueous solution with a specific gravity of 1.25 was injected.1. ? , :.
電池は５ｕｂＣ形と（７へ 公称容量は２．８Ａｈであ
ム
この電池１０セルを用いて雰囲気温度１０℃のもとで化
成として３００ｍＡの電流で１５時間充電と５０℃のも
とて３００ｍＡで端子電圧０．８Ｖまでの放電を２回繰
り返した この電池をＡとすム
つぎに比較のために従来の化成法の一例として室温２０
℃のもと３００ｍＡで１５時間充電−同じく室温３００
ｍＡで端子電圧０．８Ｖまでの放電を２回の繰り返した
電池を加えＢとし九化成後の放電電圧と容量を調べたと
ころＡは平均電圧は１．２４Ｖであり、放電容量は２．
８〜２．９Ａｈでありな ところがＢで＋Ｌ Ａと同
じ特性を示すまでに８〜１１サイクルを必要としたつぎ
に両電池それぞれ１０セル用い４００ｍＡで１３０％充
電−ＩＡで０．８Ｖまでの放電の充放電条件で寿命特性
を比較した その結果放電容量はＡでは１０００サイク
ルでも初期の８２〜８５％を示しているのに対してＢで
は７５〜７８％でありＡの性能が長期にわたって安定し
てい九なお実施例では密閉形について述べため交 開放
形でも同じ効果があム
発明の効果
以上の実施例の説明で明らかなように本発明のニッケル
−水素蓄電池の化成法によれは ニッケル正極と水素吸
蔵合金負極とセパレータを用いて電池を構成し電解液を
注入後に充電は低温度で放電は高温度で行う化成により
充放電の初期から優れた特性を示し これを長期にわた
って維持できるという効果を得ることができもThe battery is a 5ubC type (see 7).The nominal capacity is 2.8Ah.Using 10 cells of this battery, it was charged at a current of 300mA for 15 hours at an ambient temperature of 10℃, and then charged at a current of 300mA at 50℃. This battery, in which discharge was repeated twice to a terminal voltage of 0.8V, was designated as A.Next, for comparison, an example of a conventional chemical conversion method was
Charged at 300mA for 15 hours at ℃ - also at room temperature 300℃
A battery that had been repeatedly discharged twice to a terminal voltage of 0.8V at mA was added to B, and the discharge voltage and capacity after nineization were investigated, and A had an average voltage of 1.24V and a discharge capacity of 2.
However, it took 8 to 11 cycles for B to show the same characteristics as +L A.Next, using 10 cells of both batteries, I charged them to 130% at 400 mA and discharged them to 0.8 V at IA. As a result, the discharge capacity of A was 82-85% of the initial value even after 1000 cycles, while that of B was 75-78%, indicating that the performance of A was stable over a long period of time. Note that in the Examples, the closed type is described, so even the open type has the same effect.As is clear from the explanation of the Examples above, the formation method of the nickel-hydrogen storage battery of the present invention has the same effect as the nickel positive electrode. A battery is constructed using a hydrogen-absorbing alloy negative electrode and a separator, and after the electrolyte is injected, charging is performed at a low temperature and discharging at a high temperature. Through chemical formation, the battery exhibits excellent characteristics from the initial stages of charging and discharging, and is able to maintain these characteristics over a long period of time. even if you can get
Claims (4)
用いて電池を構成した後に低温度で充電し、高温度で放
電する化成を行なうニッケル−水素蓄電池の化成法。(1) A chemical formation method for a nickel-hydrogen storage battery in which a battery is formed using a nickel positive electrode, a hydrogen storage alloy negative electrode, and a separator, and then charged at a low temperature and discharged at a high temperature.
用いて電池を構成し、電解液を注入後に密閉形としその
後低温度で充電し、高温度で放電する化成を行なう請求
項１記載のニッケル−水素蓄電池の化成法。(2) A battery is constructed using a nickel positive electrode, a hydrogen storage alloy negative electrode, and a separator, and after the electrolyte is injected, the battery is made into a sealed type, and then the nickel is formed by charging at a low temperature and discharging at a high temperature. Chemical synthesis method for hydrogen storage batteries.
高温である請求項１または２記載のニッケル−水素蓄電
池の化成法。(3) The method for forming a nickel-hydrogen storage battery according to claim 1 or 2, wherein charging is performed at a low temperature of 0 to 10°C and discharging is performed at a high temperature of 40 to 60°C.
ＡＢ＿２Ｌａｖｅｓ相を含む請求項１記載の密閉形ニッ
ケル−水素蓄電池の化成法。(4) A process for forming a sealed nickel-hydrogen storage battery according to claim 1, wherein the hydrogen storage alloy contains an AB_2Laves phase based on Zr-Ni.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2174737A JP2548431B2 (en) | 1990-07-02 | 1990-07-02 | Nickel-metal hydride battery conversion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2174737A JP2548431B2 (en) | 1990-07-02 | 1990-07-02 | Nickel-metal hydride battery conversion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0465067A true JPH0465067A (en) | 1992-03-02 |
| JP2548431B2 JP2548431B2 (en) | 1996-10-30 |
Family
ID=15983791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2174737A Expired - Lifetime JP2548431B2 (en) | 1990-07-02 | 1990-07-02 | Nickel-metal hydride battery conversion method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2548431B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5334226A (en) * | 1992-07-17 | 1994-08-02 | Furukawa Denchi Kabushiki Kaisha | Method of manufacturing a sealed-type nickel-hydrogen cell |
| EP0696825A1 (en) | 1994-08-09 | 1996-02-14 | Japan Storage Battery Company Limited | Method for manufacturing nickel-metal-hydride battery |
| WO1999023709A3 (en) * | 1997-11-03 | 1999-07-08 | Eveready Battery Inc | Metal hydride cells for high rate/low temperature performance |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02267872A (en) * | 1989-04-07 | 1990-11-01 | Sanyo Electric Co Ltd | Manufacture of metal-hydrogen alkaline storage battery |
| JPH0461756A (en) * | 1990-06-28 | 1992-02-27 | Sanyo Electric Co Ltd | Manufacture of ni-h storage battery |
| JPH0462763A (en) * | 1990-06-29 | 1992-02-27 | Sanyo Electric Co Ltd | Manufacture of metal hydride storage battery |
-
1990
- 1990-07-02 JP JP2174737A patent/JP2548431B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02267872A (en) * | 1989-04-07 | 1990-11-01 | Sanyo Electric Co Ltd | Manufacture of metal-hydrogen alkaline storage battery |
| JPH0461756A (en) * | 1990-06-28 | 1992-02-27 | Sanyo Electric Co Ltd | Manufacture of ni-h storage battery |
| JPH0462763A (en) * | 1990-06-29 | 1992-02-27 | Sanyo Electric Co Ltd | Manufacture of metal hydride storage battery |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5334226A (en) * | 1992-07-17 | 1994-08-02 | Furukawa Denchi Kabushiki Kaisha | Method of manufacturing a sealed-type nickel-hydrogen cell |
| EP0696825A1 (en) | 1994-08-09 | 1996-02-14 | Japan Storage Battery Company Limited | Method for manufacturing nickel-metal-hydride battery |
| US5814108A (en) * | 1994-08-09 | 1998-09-29 | Japan Storage Battery Co., Ltd. | Method for manufacturing nickel-metal-hydride battery |
| WO1999023709A3 (en) * | 1997-11-03 | 1999-07-08 | Eveready Battery Inc | Metal hydride cells for high rate/low temperature performance |
| US6287724B2 (en) | 1997-11-03 | 2001-09-11 | Eveready Battery Company, Inc. | Nickel metal hydride cells designed for high rate/low temperature performance |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2548431B2 (en) | 1996-10-30 |
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