JP2001015117A - Core material of secondary battery, negative electrode plate, core material, and method of manufacturing negative electrode plate - Google Patents
Core material of secondary battery, negative electrode plate, core material, and method of manufacturing negative electrode plateInfo
- Publication number
- JP2001015117A JP2001015117A JP11186857A JP18685799A JP2001015117A JP 2001015117 A JP2001015117 A JP 2001015117A JP 11186857 A JP11186857 A JP 11186857A JP 18685799 A JP18685799 A JP 18685799A JP 2001015117 A JP2001015117 A JP 2001015117A
- Authority
- JP
- Japan
- Prior art keywords
- core material
- secondary battery
- hydrogen storage
- negative electrode
- electrode plate
- 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
- 239000011162 core material Substances 0.000 title claims abstract description 186
- 238000004519 manufacturing process Methods 0.000 title claims description 32
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 134
- 239000001257 hydrogen Substances 0.000 claims abstract description 134
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 133
- 239000000843 powder Substances 0.000 claims abstract description 84
- 239000011232 storage material Substances 0.000 claims abstract description 72
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 64
- 239000000956 alloy Substances 0.000 claims abstract description 64
- 238000003860 storage Methods 0.000 claims abstract description 54
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000011230 binding agent Substances 0.000 claims abstract description 25
- 238000004804 winding Methods 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims description 33
- 239000002184 metal Substances 0.000 claims description 33
- 238000005096 rolling process Methods 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 22
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 14
- 238000005245 sintering Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 229910052759 nickel Inorganic materials 0.000 claims description 13
- 238000009792 diffusion process Methods 0.000 claims description 7
- 239000011358 absorbing material Substances 0.000 claims description 6
- 238000005485 electric heating Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 12
- 206010040844 Skin exfoliation Diseases 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000008151 electrolyte solution Substances 0.000 description 7
- 229910052987 metal hydride Inorganic materials 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 230000008121 plant development Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- DOARWPHSJVUWFT-UHFFFAOYSA-N lanthanum nickel Chemical compound [Ni].[La] DOARWPHSJVUWFT-UHFFFAOYSA-N 0.000 description 1
- 150000004681 metal hydrides Chemical class 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000007789 sealing 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
- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
(57)【要約】
【課題】 芯材と水素吸蔵材の物質との密着性を高めて
巻回時における水素吸蔵材の剥離・脱落をなくすととも
に、内部抵抗を低減させて集電性能を向上させる。
【解決手段】 負極板２１を構成する芯材２２に、縁部
を盛り上げるように複数の孔部２５を形成することによ
り、表裏に突起部２４を形成する。芯材２１の表面に水
素吸蔵合金粉末２６にニッケル粉末からなるバインダー
を混合させた水素吸蔵材２３を圧延させて固着させ、負
極板２１とする。
(57) [Abstract] [Problem] To improve the current-collecting performance by improving the adhesion between the core material and the substance of the hydrogen storage material to prevent the hydrogen storage material from peeling and falling off during winding and to reduce the internal resistance. Let it. SOLUTION: A plurality of holes 25 are formed on a core material 22 constituting a negative electrode plate 21 so as to raise an edge portion, thereby forming protrusions 24 on the front and back surfaces. A hydrogen storage material 23 in which a binder made of nickel powder is mixed with a hydrogen storage alloy powder 26 is rolled and fixed on the surface of the core material 21 to form a negative electrode plate 21.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ニッケル水素電池
等の二次電池の芯材、負極板及び芯材、負極板の製造方
法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core material, a negative electrode plate and a core material of a secondary battery such as a nickel-metal hydride battery, and a method of manufacturing the negative electrode plate.
【０００２】[0002]
【従来の技術】まず、二次電池の構造を、ニッケル水素
電池を例にとって図によって説明する。図６に示すもの
は、ニッケル水素電池の一例を示すもので、図中符号１
は、水素吸蔵合金（負極活物質）を有する負極板（電
極）であり、符号２は、絶縁材からなるセパレータ、符
号３は、ニッケル（正極活物質）を有する正極板（電
極）を示している。2. Description of the Related Art First, the structure of a secondary battery will be described with reference to the drawings using a nickel-metal hydride battery as an example. FIG. 6 shows an example of a nickel-metal hydride battery.
Denotes a negative electrode plate (electrode) having a hydrogen storage alloy (negative electrode active material), reference numeral 2 denotes a separator made of an insulating material, and reference numeral 3 denotes a positive electrode plate (electrode) having nickel (positive electrode active material). I have.
【０００３】負極板１と正極板２とは、セパレータ３を
介在させることにより絶縁された状態に螺旋状に巻回さ
れて電槽４（負極端子）内に収容されて電解液に浸漬さ
れ、電槽４の一端側（図中の上側）の開口部の中央に正
極端子５が設けられた封口板６によって封鎖された構造
とされており、水素イオンを介して負極側から放出され
る電子を正極側で受け入れる形で直流回路が形成されて
いる。The negative electrode plate 1 and the positive electrode plate 2 are spirally wound in an insulated state with a separator 3 interposed therebetween, housed in a battery case 4 (negative electrode terminal), immersed in an electrolytic solution, The structure is closed by a sealing plate 6 provided with a positive electrode terminal 5 at the center of an opening on one end side (upper side in the figure) of the battery case 4, and electrons emitted from the negative electrode side via hydrogen ions. Is formed on the positive electrode side.
【０００４】上記構成のニッケル水素電池を構成する負
極板１は、図７に示すように、鉄箔１１の表面にニッケ
ルメッキ１２を施した芯材１３と、この芯材１３の表面
に塗布された水素吸蔵材１４とから構成されている。水
素吸蔵材１４は、ニッケルを主成分としたランタンニッ
ケル(ＬaＮi5)系からなる水素吸蔵合金(Metal Hydride)
粉末１５を有するもので、この水素吸蔵合金粉末１５に
樹脂からなる有機バインダーを混ぜてペースト状として
芯材１３の表面に塗布している。なお、芯材１３には、
孔部１６が形成されており、この孔部１６を水酸化カリ
ウム溶液等の電解液が通過するようになっている。As shown in FIG. 7, a negative electrode plate 1 constituting a nickel-metal hydride battery having the above-described structure is provided with a core material 13 having a nickel plating 12 formed on a surface of an iron foil 11 and a core material 13 coated on the surface of the core material 13. And the hydrogen storage material 14. The hydrogen storage material 14 is a hydrogen storage alloy (Metal Hydride) made of lanthanum nickel (LaNi 5 ) based on nickel.
An organic binder made of a resin is mixed with the hydrogen storage alloy powder 15 and applied to the surface of the core material 13 as a paste. In addition, in the core material 13,
A hole 16 is formed, and an electrolyte such as a potassium hydroxide solution passes through the hole 16.
【０００５】[0005]
【発明が解決しようとする課題】ところで、水素吸蔵材
１４に用いられる有機バインダーは、樹脂からなる絶縁
材であるため内部抵抗が高いという問題があった。この
ため、電池の内部抵抗を低減させて電流値を高めるため
に、ニッケル粉末をバインダーとして用いることが考え
られているが、水素吸蔵合金粉末１５とニッケル粉末か
らなるバインダーとを混合させた水素吸蔵材１４にあっ
ては、有機バインダーを用いた場合と比較して、芯材１
３との密着性が低いため、負極板１を巻回する際に、芯
材１３から剥離・脱落する恐れがあった。また、芯材１
３に用いられている鉄箔１１に換えて、さらに電気抵抗
が低い金属を用いて集電性能の向上が望まれているのが
現状である。However, the organic binder used for the hydrogen storage material 14 is an insulating material made of resin, and thus has a problem of high internal resistance. Therefore, in order to reduce the internal resistance of the battery and increase the current value, it has been considered to use nickel powder as a binder. However, hydrogen storage alloy powder 15 and a hydrogen storage alloy obtained by mixing a binder made of nickel powder are used. In the case of the material 14, the core material 1 is compared with the case where the organic binder is used.
Because of low adhesion to the core material 3, there is a possibility that the negative electrode plate 1 may be peeled or fall off from the core material 13 when the negative electrode plate 1 is wound. In addition, core material 1
At present, it is desired to improve the current collecting performance by using a metal having a lower electric resistance in place of the iron foil 11 used in No. 3.
【０００６】本発明は、上述する問題点に鑑みてなされ
たもので、水素吸蔵材等の物質を剥離・脱落させること
なく巻回させることができ、しかも、内部抵抗を低減さ
せて集電性能を向上させることが可能な二次電池の芯
材、負極板及び芯材、負極板の製造方法を提供すること
を目的としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and enables a material such as a hydrogen storage material to be wound without peeling or falling off. It is an object of the present invention to provide a core material, a negative electrode plate, a core material, and a method for manufacturing a negative electrode plate of a secondary battery, which can improve the performance.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、請求項１記載の二次電池の芯材は、二次電池の内部
にて互いに積層されて巻回された負極板あるいは正極板
を構成する金属板からなる芯材であって、表面が非平面
形状とされていることを特徴としている。このように、
表面が非平面形状とされているので、周囲の物質との密
着性が高められ、これにより、例えば、この芯材を負極
板の芯材として用いた場合は、巻回時に、その表裏に設
けられる水素吸蔵材の剥離・脱落を防止することができ
る。In order to achieve the above object, a core material of a secondary battery according to claim 1 is a negative electrode plate or a positive electrode plate laminated and wound inside the secondary battery. Wherein the surface is non-planar. in this way,
Since the surface has a non-planar shape, the adhesiveness with surrounding substances is enhanced, and, for example, when this core material is used as the core material of the negative electrode plate, it is provided on the front and back sides at the time of winding. Peeling and falling off of the hydrogen storage material can be prevented.
【０００８】請求項２記載の二次電池の芯材は、請求項
１記載の芯材において、前記金属板の表面に突起部を設
けることにより非平面形状とされていることを特徴とし
ている。つまり、表面に設けられた突起部によって非平
面形状とされているので、周囲の物質との密着性を突起
部によって高めることができる。According to a second aspect of the present invention, the core material of the secondary battery is characterized in that the core material has a non-planar shape by providing a projection on the surface of the metal plate. That is, since the projections provided on the surface have a non-planar shape, the adhesion to surrounding substances can be enhanced by the projections.
【０００９】請求項３記載の二次電池の芯材は、請求項
２記載の二次電池の芯材において、前記突起部が前記金
属板に直接形成されていることを特徴としている。すな
わち、突起部が金属板に直接形成されているので、別体
の突起部を金属板の表面に設ける場合と比較して、容易
に成形することができる。According to a third aspect of the present invention, in the core of the secondary battery according to the second aspect, the protrusion is formed directly on the metal plate. That is, since the projections are formed directly on the metal plate, they can be formed more easily than when a separate projection is provided on the surface of the metal plate.
【００１０】請求項４記載の二次電池の芯材は、請求項
２または請求項３記載の二次電池の芯材において、前記
金属板の巻回方向である長手方向への前記突起部の占有
率よりも、長手方向に直交する幅方向への前記突起部の
占有率が高くされていることを特徴としている。このよ
うに、突起部の占有率が長手方向よりも幅方向が高くさ
れているので、芯材の周囲の物質との幅方向への密着性
が高められ、これにより、例えば、芯材を負極板の芯材
として用いた場合に、長手方向への巻回時にて周囲の水
素吸蔵材に幅方向に沿ってクラックが生じても、幅方向
への密着性が高いので、長手方向にはクラックが生じ
ず、水素吸蔵材の剥離・脱落が確実に防止される。According to a fourth aspect of the present invention, there is provided the secondary battery core material according to the second or third aspect, wherein the protrusion is formed in a longitudinal direction which is a winding direction of the metal plate. The occupancy of the protrusion in the width direction orthogonal to the longitudinal direction is higher than the occupancy. As described above, the occupancy of the protrusions is higher in the width direction than in the longitudinal direction, so that the adhesiveness of the core material to the surrounding material in the width direction is increased. When used as a core material of a plate, even if cracks occur along the width direction in the surrounding hydrogen storage material during winding in the longitudinal direction, the adhesion in the width direction is high, so cracks occur in the longitudinal direction. Does not occur, and peeling and falling off of the hydrogen storage material are reliably prevented.
【００１１】請求項５記載の二次電池の芯材は、請求項
２〜４のいずれか１項記載の二次電池の芯材において、
前記突起部が、略等間隔に整列状態に配列されているこ
とを特徴としている。このように、突起部が等間隔に整
列状態に配列されているので、周囲の物質との密着性の
ばらつきをなくし、均等に密着させることができる。[0011] The core material of the secondary battery according to claim 5 is the core material of the secondary battery according to any one of claims 2 to 4,
The projections are arranged at substantially equal intervals in an aligned state. As described above, since the projections are arranged at regular intervals in an aligned state, it is possible to eliminate variations in adhesion to surrounding substances and to achieve uniform adhesion.
【００１２】請求項６記載の二次電池の芯材は、請求項
２〜５のいずれか１項記載の二次電池の芯材において、
前記突起部が、前記金属板の表裏に設けられていること
を特徴としている。すなわち、突起部が金属板の表裏に
形成されているので、周囲の物質との密着性を表裏にて
確実に高めることができる。[0012] The core material of the secondary battery according to claim 6 is the core material of the secondary battery according to any one of claims 2 to 5,
The protrusion is provided on the front and back of the metal plate. That is, since the protrusions are formed on the front and back of the metal plate, the adhesion to surrounding substances can be reliably increased on the front and back.
【００１３】請求項７記載の二次電池の芯材は、請求項
６記載の二次電池において、前記突起部は、前記金属板
の巻回方向である長手方向に沿って交互に前記金属板の
表裏から突出されていることを特徴としている。つま
り、突起部が巻回方向である長手方向に沿って交互に表
裏へ突出されているので、周囲の物質との密着性を表裏
にて確実にかつ均等に高めることができる。According to a seventh aspect of the present invention, in the secondary battery according to the sixth aspect, the protrusions are alternately provided along the longitudinal direction which is the winding direction of the metal plate. It is characterized by being projected from the front and back. In other words, since the projections are alternately projected to the front and back along the longitudinal direction, which is the winding direction, the adhesion to the surrounding material can be reliably and uniformly increased on the front and back.
【００１４】請求項８記載の二次電池の芯材は、請求項
２〜７のいずれか１項記載の記載の二次電池の芯材にお
いて、前記金属板に、縁部が盛り上がった孔部が形成さ
れ、該孔部の縁部が前記突起部とされていることを特徴
としている。このように、金属板に形成された孔部の盛
り上がった縁部が突起部とされているので、周囲の物質
を孔部内に入り込ませることができ、さらに密着性を高
めることができる。また、負極板の芯材として用いた場
合、孔部が電解液の通過用孔部とされるので、この電解
液の通過用孔部を別個に形成する手間を省くことができ
る。The core material of the secondary battery according to claim 8 is the core material of the secondary battery according to any one of claims 2 to 7, wherein the metal plate has a hole with a raised edge. Is formed, and the edge of the hole is the projection. As described above, since the raised edge of the hole formed in the metal plate is a projection, the surrounding substance can be introduced into the hole, and the adhesion can be further improved. In addition, when used as the core material of the negative electrode plate, the holes are used as the holes for passing the electrolytic solution, so that it is not necessary to separately form the holes for passing the electrolytic solution.
【００１５】請求項９記載の二次電池の負極板は、請求
項１〜８のいずれか１項記載の二次電池の芯材の表面
に、水素吸蔵合金粉末または該水素吸蔵合金粉末とバイ
ンダーとを混合させた混合材からなる水素吸蔵材を設け
たことを特徴としている。すなわち、芯材の表面が非平
面形状とされているので、芯材の表面に設けられる水素
吸蔵合金粉末あるいは水素吸蔵合金粉末とバインダーと
を混合させた混合材からなる水素吸蔵材を確実に密着さ
せることができ、巻回時における水素吸蔵材の剥離・脱
落を防止させることができる。According to a ninth aspect of the present invention, there is provided a negative electrode plate for a secondary battery, wherein the hydrogen storage alloy powder or the hydrogen storage alloy powder and a binder And a hydrogen storage material made of a mixed material obtained by mixing the above. That is, since the surface of the core material has a non-planar shape, the hydrogen storage material made of the hydrogen storage alloy powder or the mixture of the hydrogen storage alloy powder and the binder provided on the surface of the core material is securely adhered. It is possible to prevent peeling and falling off of the hydrogen storage material during winding.
【００１６】請求項１０記載の二次電池の負極板は、請
求項９記載の二次電池の負極板において、前記水素吸蔵
合金粉末がニッケル合金粉末からなり、前記芯材がニッ
ケルまたはニッケル合金から形成されていることを特徴
としている。このように、水素吸蔵合金粉末がニッケル
合金粉末からなり、芯材がニッケルまたはニッケル合金
から形成されているので、水素吸蔵材との密着性をさら
に高めることができる。また、鉄からなる芯材の表面に
水素吸蔵材との密着性を高めるためにニッケルメッキを
施す場合と比較して、芯材の厚さを薄くすることがで
き、電池内のスペースを有効に用いて、集電能性能を向
上させることができる。According to a tenth aspect of the present invention, in the negative electrode plate of the ninth aspect, the hydrogen storage alloy powder is made of a nickel alloy powder, and the core material is made of nickel or a nickel alloy. It is characterized by being formed. Since the hydrogen storage alloy powder is made of nickel alloy powder and the core material is made of nickel or a nickel alloy, the adhesion to the hydrogen storage material can be further improved. In addition, the thickness of the core material can be reduced compared to when nickel plating is applied to the surface of the core material made of iron to enhance the adhesion with the hydrogen storage material, and the space in the battery is effectively used. It can be used to improve current collecting performance.
【００１７】請求項１１記載の二次電池の負極板は、請
求項９または請求項１０記載の二次電池の負極板におい
て、前記バインダーがニッケル粉末またはニッケル合金
粉末であることを特徴としている。このように、水素吸
蔵合金粉末に混合されるバインダーとして、ニッケル粉
末またはニッケル合金粉末が用いられているので、例え
ば、バインダーとして樹脂の粉末を用いた場合と比較し
て、内部抵抗を低くすることができ、これにより、集電
性能をさらに向上させることができる。According to an eleventh aspect of the present invention, in the negative electrode plate of the ninth or tenth aspect, the binder is a nickel powder or a nickel alloy powder. As described above, since the nickel powder or the nickel alloy powder is used as the binder mixed with the hydrogen storage alloy powder, for example, the internal resistance is reduced as compared with the case where the resin powder is used as the binder. Thus, the current collecting performance can be further improved.
【００１８】請求項１２記載の二次電池の芯材の製造方
法は、二次電池の内部にて互いに積層されて巻回される
負極板あるいは正極板を構成する板状の芯材の製造方法
であって、前記芯材を構成する金属粉末からなる芯材材
料を圧延して板状に成形する成形工程と、該板状に成形
した芯材材料を焼結させる焼結工程と、該焼結工程の前
もしくは後に、前記板状に形成した芯材材料の表面を非
平面形状に形成する形成工程とを行うことを特徴として
いる。According to a twelfth aspect of the present invention, there is provided a method of manufacturing a plate-shaped core material constituting a negative electrode plate or a positive electrode plate which is laminated and wound inside the secondary battery. A molding step of rolling a core material made of metal powder constituting the core material and forming the core material into a plate shape; a sintering step of sintering the core material formed into the plate shape; Before or after the binding step, a step of forming a surface of the plate-shaped core material into a non-planar shape is performed.
【００１９】このように、金属粉末を圧延することによ
り板状に成形された芯材材料を焼結する前もしくは焼結
した後に、形成工程を行うことにより、芯材材料の表面
が非平面形状とされた芯材を容易に製造することができ
る。As described above, by performing the forming step before or after sintering the core material formed into a plate shape by rolling the metal powder, the surface of the core material has a non-planar shape. The core material can be easily manufactured.
【００２０】請求項１３記載の二次電池の負極板の製造
方法は、請求項１〜８のいずれか１項記載の二次電池の
芯材を、その表面に水素吸蔵合金粉末または該水素吸蔵
合金粉末とバインダーとを混合させた混合材からなる水
素吸蔵材を介在させ、一対のローラ間へ通すことにより
加圧し、前記芯材の表面に前記水素吸蔵材を付着させる
ことを特徴としている。According to a thirteenth aspect of the present invention, there is provided a method for manufacturing a negative electrode plate for a secondary battery, wherein the core material of the secondary battery according to any one of the first to eighth aspects is provided with a hydrogen storage alloy powder or a hydrogen storage alloy on the surface thereof. The method is characterized in that a hydrogen absorbing material made of a mixed material obtained by mixing an alloy powder and a binder is interposed and pressurized by passing between a pair of rollers to adhere the hydrogen absorbing material to the surface of the core material.
【００２１】このように、芯材を、水素吸蔵材を介在さ
せて一対のローラ間に通すことにより、極めて容易に、
芯材の表面に水素吸蔵材が高い密着性にて付着されて、
巻回時に水素吸蔵材の剥離・脱落が生じる恐れのない負
極板を製造することができる。As described above, by passing the core material between the pair of rollers with the hydrogen absorbing material interposed therebetween,
Hydrogen storage material is attached to the surface of the core material with high adhesion,
It is possible to manufacture a negative electrode plate in which the hydrogen storage material does not peel or fall off during winding.
【００２２】請求項１４記載の二次電池の負極板の製造
方法は、請求項１３記載の二次電池の負極板の製造方法
において、前記芯材の表面に前記水素吸蔵材を付着させ
た後に、電圧が印加された一対のローラ間へ通して通電
加熱させることにより、前記水素吸蔵合金粉末同士及び
前記水素吸蔵合金粉末と芯材とを拡散接合させることを
特徴としている。According to a fourteenth aspect of the present invention, there is provided a method of manufacturing a negative electrode plate for a secondary battery according to the thirteenth aspect, wherein the hydrogen storage material is attached to a surface of the core material. In addition, by passing current through a pair of rollers to which a voltage is applied and heating the diffusion, the hydrogen storage alloy powders and the hydrogen storage alloy powder and the core material are diffusion-bonded.
【００２３】つまり、水素吸蔵合金粉末同士及び水素吸
蔵合金粉末と芯材とが拡散接合されて、芯材の表面への
水素吸蔵材の付着強度がさらに高められて、さらに巻回
時に水素吸蔵材の剥離・脱落が生じる恐れのない負極板
を製造することができる。That is, the hydrogen-absorbing alloy powders and the hydrogen-absorbing alloy powder and the core material are diffusion-bonded to each other, so that the adhesion strength of the hydrogen-absorbing material to the surface of the core material is further increased. It is possible to manufacture a negative electrode plate that is not likely to cause peeling or falling off.
【００２４】請求項１５記載の二次電池の負極板の製造
方法は、請求項１〜８のいずれか１項記載の二次電池の
芯材を、その表面に水素吸蔵合金粉末または該水素吸蔵
合金粉末とバインダーとを混合させた混合材からなる水
素吸蔵材を介在させ、電圧が印加された一対のローラ間
へ通すことにより加圧するとともに通電加熱させ、前記
芯材の表面に前記水素吸蔵材を付着させるとともに前記
水素吸蔵合金粉末同士及び前記水素吸蔵合金粉末と芯材
とを拡散接合させることを特徴としている。According to a fifteenth aspect of the present invention, there is provided a method for manufacturing a negative electrode plate for a secondary battery, wherein the core material of the secondary battery according to any one of the first to eighth aspects is provided with a hydrogen storage alloy powder or a hydrogen storage alloy powder on the surface thereof. A hydrogen occluding material made of a mixed material obtained by mixing an alloy powder and a binder is interposed, pressurized by passing between a pair of rollers to which a voltage is applied, and energized and heated, so that the hydrogen occluding material is applied to the surface of the core material. And the diffusion-bonding between the hydrogen storage alloy powders and between the hydrogen storage alloy powder and the core material.
【００２５】すなわち、芯材を、水素吸蔵材を介在させ
て電圧が印加された一対のローラ間に通すことにより、
芯材の表面に水素吸蔵材を高い密着性にて付着させるこ
とができ、しかも、芯材への水素吸蔵材の付着と同時
に、水素吸蔵合金粉末同士及び水素吸蔵合金粉末と芯材
とを拡散接合させることができ、極めて容易にかつ短時
間にて巻回時に水素吸蔵材の剥離・脱落が生じる恐れの
ない負極板を製造することができる。That is, by passing the core material between a pair of rollers to which a voltage is applied with a hydrogen storage material interposed,
The hydrogen storage material can be adhered to the surface of the core material with high adhesion, and at the same time as the hydrogen storage material adheres to the core material, the hydrogen storage alloy powder and the hydrogen storage alloy powder and the core material diffuse. It is possible to manufacture a negative electrode plate that can be bonded and that is extremely easy and in a short time and in which there is no risk of peeling or falling off of the hydrogen storage material during winding.
【００２６】[0026]
【発明の実施の形態】以下、本発明の実施の形態の二次
電池の芯材、負極板及び芯材、負極板の製造方法を図に
よって説明する。図１において、符号２１は、負極板で
ある。この負極板２１は、ニッケル箔からなる芯材２２
と、この芯材２２の表面に塗布された水素吸蔵材２３と
から構成されている。芯材２２は、図２に示すように、
その表裏の面に、複数の突起部２４が形成されている。
これら突起部２４は、表裏に貫通する孔部２５の周縁部
を一方の面から盛り上げることにより形成されている。
つまり、この芯材２２は、その表面が突起部２４によっ
て非平面形状とされている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a core material, a negative electrode plate, a core material, and a method for manufacturing a negative electrode plate of a secondary battery according to an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 21 denotes a negative electrode plate. This negative electrode plate 21 is made of a core material 22 made of nickel foil.
And a hydrogen storage material 23 applied to the surface of the core material 22. The core material 22 is, as shown in FIG.
A plurality of projections 24 are formed on the front and back surfaces.
These projections 24 are formed by raising the peripheral edge of a hole 25 penetrating from the front to the back from one surface.
That is, the surface of the core member 22 is formed in a non-planar shape by the protrusion 24.
【００２７】これら孔部２５は、平面視長孔形状に形成
されており、この孔部２５は、その長さ方向が、電池を
組み立てる際の芯材２２の巻回方向である長手方向に対
して直交する幅方向に沿って整列されて複数配列されて
いる。これにより、芯材２２の長手方向における突起部
２４の占有率よりも芯材２２の長手方向に直交する幅方
向における突起部２４の占有率が高くされている。The holes 25 are formed in a long hole shape in a plan view. The length of the holes 25 is in relation to the longitudinal direction which is the winding direction of the core material 22 when assembling the battery. And a plurality of them are arranged along the width direction orthogonal to each other. Thereby, the occupancy of the protrusions 24 in the width direction orthogonal to the longitudinal direction of the core material 22 is higher than the occupancy of the protrusions 24 in the longitudinal direction of the core material 22.
【００２８】また、これら突起部２４は、略等間隔に整
列状態に配列されており、芯材２２の一方の面から突出
した突起部２４の列と、芯材２２の他方の面から突出し
た突起部２４の列とが、芯材２２の長手方向に沿って交
互に表裏から突出するように形成されている。さらに、
芯材２２の一方の面に形成された突起部２４と、他方の
面に形成された突起部２４とは、芯材２２の幅方向に向
かって千鳥状に配設されている。The projections 24 are arranged at substantially equal intervals in an aligned state, and are arranged in rows of the projections 24 protruding from one surface of the core material 22 and protruding from the other surface of the core material 22. The rows of the projections 24 are formed so as to alternately protrude from the front and back along the longitudinal direction of the core material 22. further,
The protrusions 24 formed on one surface of the core member 22 and the protrusions 24 formed on the other surface are arranged in a staggered manner in the width direction of the core member 22.
【００２９】上記のように形成されたニッケル箔からな
る芯材２２の表裏に設けられた水素吸蔵材２３は、水素
吸蔵合金粉末２６とニッケル粉末からなるバインダーと
を混合させたもので、この水素吸蔵材２３が、芯材２２
に圧延されて付着され、その後、通電することにより、
水素吸蔵合金粉末２６同士及び芯材２２と水素吸蔵合金
粉末２６とが拡散接合されている。The hydrogen storage material 23 provided on the front and back of the core material 22 made of nickel foil formed as described above is a mixture of a hydrogen storage alloy powder 26 and a binder made of nickel powder. The storage material 23 is the core material 22
Rolled and adhered, and then energized,
The hydrogen storage alloy powders 26 and the core material 22 and the hydrogen storage alloy powder 26 are diffusion bonded to each other.
【００３０】ここで、上記構成の負極板２１を構成する
芯材２２を製造する場合について説明する。図３におい
て、符号３１は、圧延ローラであり、この圧延ローラ３
１の一方には、ドクターブレード３２が表面に近接させ
て所定の隙間をあけて配設されており、このドクターブ
レード３２と一方の圧延ローラ３１とから形成された溝
部に、ニッケル粉末３３が投入されている。Here, a case where the core material 22 constituting the negative electrode plate 21 having the above structure is manufactured will be described. In FIG. 3, reference numeral 31 denotes a rolling roller.
On one side, a doctor blade 32 is disposed close to the surface with a predetermined gap, and nickel powder 33 is put into a groove formed by this doctor blade 32 and one of the rolling rollers 31. Have been.
【００３１】そして、このドクターブレード３２と一方
の圧延ローラ３１との隙間から、圧延ローラ３１同士の
間へニッケル粉末３３が所定量ずつ送り出され、これに
より、このニッケル粉末３３が圧延ローラ３１によって
圧延されて所定厚さの板状に成形されて焼結炉３４に送
り込まれ、この焼結炉３４にて焼結され、多孔質のニッ
ケル箔として送り出されるようになっている。また、こ
の焼結炉３４の下流側には、突起部成形機構３５が設け
られており、この突起部成形機構３５にて、ニッケル箔
に突起部２４及び孔部２５が形成されて芯材２２とされ
るようになっている。Then, a predetermined amount of nickel powder 33 is sent out between the rolling rollers 31 from a gap between the doctor blade 32 and one of the rolling rollers 31, whereby the nickel powder 33 is rolled by the rolling rollers 31. Then, it is formed into a plate having a predetermined thickness, sent to a sintering furnace 34, sintered in the sintering furnace 34, and sent out as a porous nickel foil. Further, on the downstream side of the sintering furnace 34, a protrusion forming mechanism 35 is provided. In the protrusion forming mechanism 35, the protrusion 24 and the hole 25 are formed on the nickel foil to form the core material 22. It is supposed to be.
【００３２】つまり、芯材２２は、ニッケル粉末３３を
圧延して板状に成形する成形工程と、この成形工程によ
って圧延されて板状に成形された芯材材料を焼結する焼
結工程とによりニッケル箔とし、さらに、このニッケル
箔に突起部２４及び孔部２５を形成して非平面形状とす
る形成工程を行うことにより製造される。なお、この例
では、焼結後のニッケル箔に突起部２４及び孔部２５を
形成したが、焼結前に、突起部２４及び孔部２５を形成
しても良い。That is, the core material 22 is formed by rolling the nickel powder 33 into a plate shape, and sintering the core material rolled and formed into a plate shape by the forming process. To form a non-planar shape by forming projections 24 and holes 25 on the nickel foil. In this example, the projections 24 and the holes 25 are formed on the sintered nickel foil, but the projections 24 and the holes 25 may be formed before the sintering.
【００３３】次に、二次電池を構成する負極板２１を製
造する場合について説明する。図４において、符号４１
及び符号４２は、それぞれ一対一組の圧延ローラ（ロー
ラ）であり、それぞれ互いに所定間隔をあけて配設さ
れ、その間に芯材２２が通されるようになっている。Next, a case of manufacturing the negative electrode plate 21 constituting the secondary battery will be described. In FIG.
Reference numeral 42 denotes a pair of rolling rollers (rollers), which are disposed at a predetermined interval from each other, and through which the core material 22 is passed.
【００３４】圧延ローラ４１には、それぞれその上部側
に、圧延ローラ４１の周面との間に隙間をあけて粉末供
給用ローラ４３が設けられており、これら圧延ローラ４
１と粉末供給用ローラ４３とから形成された溝部には、
それぞれホッパ４４が設けられている。そして、これら
ホッパ４４には、水素吸蔵材２３が投入されて、この水
素吸蔵材２３が圧延ローラ４１と粉末供給用ローラ４３
との隙間から芯材２２の両面側へ所定量ずつ送り出され
るようになっている。Each of the rolling rollers 41 is provided on its upper side with a powder supply roller 43 with a gap between the rolling roller 41 and the peripheral surface of the rolling roller 41.
1 and a groove formed by the powder supply roller 43,
A hopper 44 is provided for each. The hydrogen storage material 23 is supplied to these hoppers 44, and the hydrogen storage material 23 is supplied to the rolling roller 41 and the powder supply roller 43.
Is sent out by a predetermined amount to both sides of the core material 22 from the gap between the core material 22 and the core material 22.
【００３５】また、下流側に設けられた圧延ローラ４２
には、電源装置４５が接続されており、圧延ローラ４２
間にて所定の電圧が印加されるようになっている。な
お、粉末供給用ローラ４３の圧延ローラ４１との隙間や
粉末供給用ローラ４３の回転を調整することにより、芯
材２２の両面側へ送り出される水素吸蔵材２３の供給量
を調整することができるようになっている。A rolling roller 42 provided on the downstream side
Is connected to a power supply device 45,
A predetermined voltage is applied in between. By adjusting the gap between the powder supply roller 43 and the rolling roller 41 and the rotation of the powder supply roller 43, the supply amount of the hydrogen storage material 23 sent to both sides of the core material 22 can be adjusted. It has become.
【００３６】そして、上記装置によれば、圧延ローラ４
１と粉末供給用ローラ４３との隙間から送り出される水
素吸蔵材２３が、圧延ローラ４１によって芯材２２へ加
圧されて、芯材２２の両面に水素吸蔵材２３が一体的に
付着した負極板２１とされる。その後、この負極板２１
が、電源装置４５によって電圧が印加されている圧延ロ
ーラ４２間へ送り込まれると、これら圧延ローラ４２に
よってさらに加圧され、そのとき、負極板２１に電流が
流されて通電加熱されることにより、水素吸蔵材２３を
構成する水素吸蔵合金粉末２６同士及び芯材２２と水素
吸蔵合金粉末２６とが拡散接合される。According to the above apparatus, the rolling roller 4
Negative electrode plate in which hydrogen storage material 23 sent out from a gap between powder 1 and powder supply roller 43 is pressed against core material 22 by rolling roller 41, and hydrogen storage material 23 is integrally attached to both surfaces of core material 22. 21. Thereafter, the negative electrode plate 21
Is fed between the rolling rollers 42 to which a voltage is applied by the power supply device 45, the pressure is further increased by the rolling rollers 42, and at this time, a current is caused to flow through the negative electrode plate 21 so as to be heated. The hydrogen storage alloy powders 26 constituting the hydrogen storage material 23 and the core material 22 and the hydrogen storage alloy powder 26 are diffusion bonded.
【００３７】なお、上記の例では、芯材２２に水素吸蔵
材２３を加圧して付着させる圧延ロール４１と、水素吸
蔵合金粉末２６同士及び芯材２２と水素吸蔵合金粉末２
６とを拡散接合させる圧延ロール４２とを別個に設けた
が、図５に示すように、水素吸蔵材２３を芯材２２に付
着させる圧延ロール４１に電源装置４５を接続し、この
圧延ロール４１によって芯材２２に水素吸蔵材２３を加
圧して付着させると同時に、水素吸蔵合金粉末２６同士
及び芯材２２と水素吸蔵合金粉末２６とを通電加熱によ
り拡散接合させても良い。In the above example, the rolling roll 41 for pressing and adhering the hydrogen storage material 23 to the core material 22, the hydrogen storage alloy powders 26 and the core material 22 and the hydrogen storage alloy powder 2
A power supply device 45 is connected to a rolling roll 41 for adhering the hydrogen storage material 23 to the core material 22 as shown in FIG. At the same time, the hydrogen-absorbing material 23 may be adhered to the core material 22 by pressurizing, and the hydrogen-absorbing alloy powders 26 and the core material 22 and the hydrogen-absorbing alloy powder 26 may be diffusion-bonded by electric heating.
【００３８】以上説明したように、上記二次電池の芯材
２２によれば、ニッケルからなる金属板の表面が突起部
２４によって非平面形状とされたものであるので、周囲
の物質との密着性が高められ、これにより、例えば、こ
の芯材２２を負極板２１の芯材２２として用いた上記の
場合は、巻回時に、例えクラックが生じてもその表裏の
水素吸蔵材２３の剥離・脱落を防止することができる。As described above, according to the core material 22 of the secondary battery, since the surface of the metal plate made of nickel is formed in a non-planar shape by the projections 24, the core material 22 is closely adhered to surrounding materials. For example, in the case where the core material 22 is used as the core material 22 of the negative electrode plate 21, even if a crack occurs at the time of winding, even if a crack occurs, the hydrogen storage material 23 on the front and back thereof is peeled off. Dropout can be prevented.
【００３９】また、突起部２４が直接形成されているの
で、別体の突起部を表面に設ける場合と比較して、容易
に成形することができる。しかも、突起部２４の占有率
が長手方向よりも幅方向が高くされているので、芯材２
２の水素吸蔵材２３との幅方向への密着性が高められ、
これにより、長手方向への巻回時にて周囲の水素吸蔵材
２３に幅方向に沿ってクラックが生じても、幅方向への
密着性が高いので、長手方向にはクラックが生じず、水
素吸蔵材２３の剥離・脱落を確実に防止することができ
る。Further, since the projections 24 are formed directly, the molding can be easily performed as compared with the case where a separate projection is provided on the surface. In addition, since the occupation ratio of the projection 24 is higher in the width direction than in the longitudinal direction, the core material 2
2, the adhesion in the width direction with the hydrogen storage material 23 is improved,
Thereby, even if a crack occurs in the surrounding hydrogen storage material 23 along the width direction during the winding in the longitudinal direction, since the adhesiveness in the width direction is high, no crack occurs in the longitudinal direction, and Peeling and falling off of the material 23 can be reliably prevented.
【００４０】また、突起部２４が等間隔に整列状態に配
列されているので、周囲の物質との密着性のばらつきを
なくし、均等に密着させることができ、さらには、突起
部２４が表裏に形成されているので、水素吸蔵材２３と
の密着性を表裏にて確実に高めることができる。また、
突起部２４が巻回方向である長手方向に沿って交互に表
裏へ突出されているので、水素吸蔵材２３との密着性を
表裏にて確実にかつ均等に高めることができる。Further, since the projections 24 are arranged at regular intervals in an aligned state, it is possible to eliminate variations in the adhesiveness to surrounding substances and to achieve uniform adhesion. Since it is formed, the adhesiveness with the hydrogen storage material 23 can be reliably increased on both sides. Also,
Since the projections 24 are alternately projected to the front and back along the longitudinal direction which is the winding direction, the adhesion to the hydrogen storage material 23 can be reliably and uniformly increased on the front and back.
【００４１】さらに、金属板に形成された孔部２５の盛
り上がった縁部が突起部２４とされているので、水素吸
蔵材２３を孔部２５に入り込ませることができ、さらに
密着性を高めることができる。また、孔部２５が電解液
の通過用孔部とされるので、この電解液の通過用孔部を
別個に形成する手間を省くことができる。Further, since the raised edge of the hole 25 formed in the metal plate is the projection 24, the hydrogen storage material 23 can be inserted into the hole 25, and the adhesion can be further improved. Can be. In addition, since the hole 25 is a hole for passing the electrolytic solution, the trouble of separately forming the hole for passing the electrolytic solution can be omitted.
【００４２】また、この芯材２２を有する負極板２１に
よれば、芯材２２の表面が、複数の突起部２４によって
非平面形状とされているので、芯材２２の表面に設けら
れる水素吸蔵合金粉末２６とニッケル粉末からなるバイ
ンダーとを混合させた混合材からなる水素吸蔵材２３を
確実に密着させることができ、巻回時における水素吸蔵
材２３の剥離・脱落を防止させることができる。According to the negative electrode plate 21 having the core member 22, since the surface of the core member 22 is formed in a non-planar shape by the plurality of projections 24, the hydrogen absorbing member provided on the surface of the core member 22 is formed. The hydrogen storage material 23 made of a mixed material in which the alloy powder 26 and the binder made of nickel powder are mixed can be securely adhered to each other, and peeling and falling off of the hydrogen storage material 23 during winding can be prevented.
【００４３】また、芯材２２がニッケルから形成されて
いるので、水素吸蔵材２３との密着性をさらに高めるこ
とができる。そして、従来のように鉄の表面に水素吸蔵
材２３との密着性を高めるためにニッケルメッキを施す
場合と比較して、芯材２２の厚さを薄くすることがで
き、電池内のスペースを有効に用いて、集電性能を向上
させることができる。Further, since the core member 22 is formed of nickel, the adhesion to the hydrogen storage material 23 can be further improved. The thickness of the core member 22 can be reduced as compared with a conventional case in which nickel is plated on the surface of iron to enhance the adhesion to the hydrogen storage material 23, and the space in the battery is reduced. It can be used effectively to improve current collection performance.
【００４４】しかも、水素吸蔵合金粉末２６に混合され
るバインダーとして、ニッケル粉末が用いられているの
で、例えば、バインダーとして樹脂の粉末を用いた場合
と比較して、内部抵抗を低くすることができ、これによ
り、集電性能をさらに向上させることができる。Moreover, since nickel powder is used as the binder mixed with the hydrogen storage alloy powder 26, the internal resistance can be reduced as compared with the case where resin powder is used as the binder, for example. Thus, the current collection performance can be further improved.
【００４５】また、上記の芯材２２の製造方法によれ
ば、圧延ローラ３１によって板状に圧延された芯材材料
を焼結炉３４によって焼結する前もしくは焼結した後
に、突起成形機構３５によって突起部２４及び孔部２５
を形成することにより、突起部２４及び孔部２５が形成
されて表面が非平面形状とされた芯材２２を容易に製造
することができる。Further, according to the above-described method of manufacturing the core member 22, before or after sintering the core member rolled into a plate shape by the rolling roller 31 in the sintering furnace 34, the protrusion forming mechanism 35 is formed. Projection 24 and hole 25
By forming the core member 22, the core member 22 having the non-planar surface formed with the projections 24 and the holes 25 can be easily manufactured.
【００４６】また、上記の負極板２１の製造方法によれ
ば、芯材２２を、水素吸蔵材２３を介在させて一対の圧
延ローラ４１間に通すことにより、極めて容易に、芯材
２２の表面に水素吸蔵材２３が高い密着性にて付着さ
せ、その後、電圧を印加させた一対の圧延ローラ４２間
に通すことにより、水素吸蔵合金粉末２６同士及び水素
吸蔵合金粉末２６と芯材２２とを拡散接合させ、芯材２
２の表面への水素吸蔵材２３の付着強度が極めて高く、
巻回時における水素吸蔵材２３の剥離・脱落が生じる恐
れのない負極板２１を製造することができる。According to the above-described method of manufacturing the negative electrode plate 21, the core material 22 is passed between the pair of rolling rollers 41 with the hydrogen storage material 23 interposed therebetween, so that the surface of the core material 22 can be extremely easily formed. The hydrogen storage material 23 is adhered with high adhesion to the core material 22 and then passed between a pair of rolling rollers 42 to which a voltage is applied, so that the hydrogen storage alloy powders 26 and the hydrogen storage alloy powder 26 and the core material 22 are separated. Diffusion bonding, core material 2
2, the adhesion strength of the hydrogen storage material 23 to the surface is extremely high,
It is possible to manufacture the negative electrode plate 21 in which there is no possibility that the hydrogen storage material 23 is peeled or dropped during winding.
【００４７】なお、水素吸蔵材２３を芯材２２に付着さ
せる圧延ローラ４１に電圧を印加させておくことによ
り、芯材２２の表面への水素吸蔵材２３の付着及び水素
吸蔵合金粉末２６同士及び水素吸蔵合金粉末２６と芯材
２２との拡散接合を同時に行うことができる。By applying a voltage to the rolling roller 41 for adhering the hydrogen storage material 23 to the core material 22, the adhesion of the hydrogen storage material 23 to the surface of the core material 22 and the hydrogen storage alloy powders 26 and Diffusion bonding between the hydrogen storage alloy powder 26 and the core material 22 can be performed simultaneously.
【００４８】なお、上記の例では、負極板２１の芯材２
２について説明したが、正極板の芯材も同様にその表面
に突起部を形成して非平面形状としても良い。また、上
記の例では、芯材２２をニッケルから形成したが、ニッ
ケル合金でも同様な効果を得ることができるのは勿論で
ある。さらには、水素吸蔵材２３の水素吸蔵合金粉末２
６に混合されるバインダーとしては、ニッケル合金粉末
が用いられる場合もある。In the above example, the core material 2 of the negative electrode plate 21 was used.
2 has been described, but the core of the positive electrode plate may also be formed in a non-planar shape by forming a projection on the surface in the same manner. Further, in the above example, the core material 22 is formed from nickel, but it is a matter of course that a similar effect can be obtained with a nickel alloy. Further, the hydrogen storage alloy powder 2 of the hydrogen storage material 23 is used.
Nickel alloy powder may be used as the binder to be mixed in 6.
【００４９】[0049]
【発明の効果】以上、説明したように、本発明の二次電
池の芯材、負極板及び芯材、負極板の製造方法によれ
ば、下記の効果を得ることができる。請求項１記載の二
次電池の芯材によれば、表面が非平面形状とされている
ので、周囲の物質との密着性が高められ、これにより、
例えば、この芯材を負極板の芯材として用いた場合は、
巻回時に、その表裏に設けられる水素吸蔵材の剥離・脱
落を防止することができる。As described above, according to the core material, the negative electrode plate, the core material, and the method for manufacturing the negative electrode plate of the secondary battery of the present invention, the following effects can be obtained. According to the core material of the secondary battery according to the first aspect, since the surface has a non-planar shape, adhesion to surrounding substances is enhanced, and
For example, when this core is used as the core of the negative electrode plate,
At the time of winding, peeling and falling off of the hydrogen storage material provided on the front and back surfaces can be prevented.
【００５０】請求項２記載の二次電池の芯材によれば、
表面に設けられた突起部によって非平面形状とされてい
るので、周囲の物質との密着性を突起部によって高める
ことができる。According to the core material of the secondary battery according to the second aspect,
The non-planar shape provided by the protrusions provided on the surface allows the protrusions to enhance the adhesion to surrounding substances.
【００５１】請求項３記載の二次電池の芯材によれば、
突起部が金属板に直接形成されているので、別体の突起
部を金属板の表面に設ける場合と比較して、容易に成形
することができる。According to the secondary battery core material of the third aspect,
Since the projections are formed directly on the metal plate, they can be formed more easily than when a separate projection is provided on the surface of the metal plate.
【００５２】請求項４記載の二次電池の芯材によれば、
突起部の占有率が長手方向よりも幅方向が高くされてい
るので、芯材の周囲の物質との幅方向への密着性が高め
られ、これにより、例えば、芯材を負極板の芯材として
用いた場合に、長手方向への巻回時にて周囲の水素吸蔵
材に幅方向に沿ってクラックが生じても、幅方向への密
着性が高いので、長手方向にはクラックが生じず、水素
吸蔵材の剥離・脱落が確実に防止される。According to the core material of the secondary battery according to the fourth aspect,
Since the occupancy of the protrusions is higher in the width direction than in the longitudinal direction, the adhesiveness of the core material to the surrounding material in the width direction is increased. When used as, even if a crack occurs along the width direction in the surrounding hydrogen storage material at the time of winding in the longitudinal direction, because the adhesion in the width direction is high, no crack occurs in the longitudinal direction, Peeling and falling off of the hydrogen storage material are reliably prevented.
【００５３】請求項５記載の二次電池の芯材によれば、
突起部が等間隔に整列状態に配列されているので、周囲
の物質との密着性のばらつきをなくし、均等に密着させ
ることができる。According to the core material of the secondary battery according to the fifth aspect,
Since the projections are arranged at regular intervals in an aligned state, it is possible to eliminate variations in the adhesion to surrounding substances and to achieve uniform adhesion.
【００５４】請求項６記載の二次電池の芯材によれば、
突起部が金属板の表裏に形成されているので、周囲の物
質との密着性を表裏にて確実に高めることができる。According to the core material of the secondary battery according to claim 6,
Since the protrusions are formed on the front and back of the metal plate, the adhesion to surrounding substances can be reliably improved on the front and back.
【００５５】請求項７記載の二次電池の芯材によれば、
突起部が巻回方向である長手方向に沿って交互に表裏へ
突出されているので、周囲の物質との密着性を表裏にて
確実にかつ均等に高めることができる。According to the core material of the secondary battery according to claim 7,
Since the protruding portions are alternately protruded to the front and back along the longitudinal direction which is the winding direction, the adhesion to the surrounding material can be reliably and uniformly increased on the front and back.
【００５６】請求項８記載の二次電池の芯材によれば、
金属板に形成された孔部の盛り上がった縁部が突起部と
されているので、周囲の物質を孔部内に入り込ませるこ
とができ、さらに密着性を高めることができる。また、
負極板の芯材として用いた場合、孔部が電解液の通過用
孔部とされるので、この電解液の通過用孔部を別個に形
成する手間を省くことができる。According to the core material of the secondary battery according to claim 8,
Since the raised edge of the hole formed in the metal plate is a protruding portion, the surrounding substance can be introduced into the hole, and the adhesion can be further improved. Also,
When used as the core material of the negative electrode plate, the holes are formed as holes for passing the electrolytic solution, so that it is not necessary to separately form the holes for passing the electrolytic solution.
【００５７】請求項９記載の二次電池の負極板によれ
ば、芯材の表面が非平面形状とされているので、芯材の
表面に設けられる水素吸蔵合金粉末あるいは水素吸蔵合
金粉末とバインダーとを混合させた混合材からなる水素
吸蔵材を確実に密着させることができ、巻回時における
水素吸蔵材の剥離・脱落を防止させることができる。According to the negative electrode plate of the ninth aspect, since the surface of the core material is non-planar, the hydrogen storage alloy powder or the hydrogen storage alloy powder and the binder provided on the surface of the core material are provided. And a hydrogen storage material made of a mixed material obtained by mixing the hydrogen storage material can be surely brought into close contact with each other, and peeling and falling off of the hydrogen storage material during winding can be prevented.
【００５８】請求項１０記載の二次電池の負極板によれ
ば、水素吸蔵合金粉末がニッケル合金粉末からなり、芯
材がニッケルまたはニッケル合金から形成されているの
で、水素吸蔵材との密着性をさらに高めることができ
る。また、鉄からなる芯材の表面に水素吸蔵材との密着
性を高めるためにニッケルメッキを施す場合と比較し
て、芯材の厚さを薄くすることができ、電池内のスペー
スを有効に用いて、集電性能を向上させることができ
る。According to the tenth aspect of the present invention, since the hydrogen storage alloy powder is made of nickel alloy powder and the core material is made of nickel or nickel alloy, the adhesion to the hydrogen storage material is improved. Can be further enhanced. In addition, the thickness of the core material can be reduced compared to when nickel plating is applied to the surface of the core material made of iron to enhance the adhesion with the hydrogen storage material, and the space in the battery is effectively used. When used, current collection performance can be improved.
【００５９】請求項１１記載の二次電池の負極板によれ
ば、水素吸蔵合金粉末に混合されるバインダーとして、
ニッケル粉末またはニッケル合金粉末が用いられている
ので、例えば、バインダーとして樹脂の粉末を用いた場
合と比較して、内部抵抗を低くすることができ、これに
より、集電性能をさらに向上させることができる。According to the negative electrode plate of the secondary battery according to the eleventh aspect, as the binder mixed with the hydrogen storage alloy powder,
Since nickel powder or nickel alloy powder is used, for example, the internal resistance can be reduced as compared with a case where a resin powder is used as a binder, thereby further improving current collection performance. it can.
【００６０】請求項１２記載の二次電池の芯材の製造方
法によれば、金属粉末を圧延することにより板状に成形
された芯材材料を焼結する前もしくは焼結した後に、形
成工程を行うことにより、芯材材料の表面が非平面形状
とされた芯材を容易に製造することができる。According to a twelfth aspect of the present invention, there is provided a method of manufacturing a core material for a secondary battery before or after sintering a core material formed into a plate by rolling metal powder. By performing the above, a core material in which the surface of the core material has a non-planar shape can be easily manufactured.
【００６１】請求項１３記載の二次電池の負極板の製造
方法によれば、芯材を、水素吸蔵材を介在させて一対の
ローラ間に通すことにより、極めて容易に、芯材の表面
に水素吸蔵材が高い密着性にて付着されて、巻回時に水
素吸蔵材の剥離・脱落が生じる恐れのない負極板を製造
することができる。According to the method for manufacturing a negative electrode plate of a secondary battery according to the thirteenth aspect, by passing the core material between a pair of rollers with a hydrogen storage material interposed therebetween, the core material can be extremely easily applied to the surface of the core material. It is possible to manufacture a negative electrode plate in which the hydrogen storage material is adhered with high adhesiveness and there is no possibility that the hydrogen storage material will be peeled off or fall off during winding.
【００６２】請求項１４記載の二次電池の負極板の製造
方法によれば、水素吸蔵合金粉末同士及び水素吸蔵合金
粉末と芯材とが拡散接合されて、芯材の表面への水素吸
蔵材の付着強度がさらに高められて、さらに巻回時に水
素吸蔵材の剥離・脱落が生じる恐れのない負極板を製造
することができる。According to the method for manufacturing a negative electrode plate of a secondary battery according to the present invention, the hydrogen storage alloy powder and the hydrogen storage alloy powder and the core material are diffusion-bonded to each other to form a hydrogen storage material on the surface of the core material. The negative electrode plate can be manufactured in which the adhesion strength of the hydrogen storage material is further increased and the hydrogen storage material is not likely to peel or fall off during winding.
【００６３】請求項１５記載の二次電池の負極板の製造
方法によれば、芯材を、水素吸蔵材を介在させて電圧が
印加された一対のローラ間に通すことにより、芯材の表
面に水素吸蔵材を高い密着性にて付着させることがで
き、しかも、芯材への水素吸蔵材の付着と同時に、水素
吸蔵合金粉末同士及び水素吸蔵合金粉末と芯材とを拡散
接合させることができ、極めて容易にかつ短時間にて巻
回時に水素吸蔵材の剥離・脱落が生じる恐れのない負極
板を製造することができる。According to the method for manufacturing a negative electrode plate of a secondary battery according to the fifteenth aspect, the core material is passed between a pair of rollers to which a voltage is applied with a hydrogen storage material interposed therebetween, so that the surface of the core material is formed. The hydrogen storage material can be adhered to the core with high adhesion, and at the same time as the hydrogen storage material adheres to the core material, the hydrogen storage alloy powder and the hydrogen storage alloy powder can be diffusion bonded to the core material. This makes it possible to manufacture a negative electrode plate very easily and in a short time without the risk of peeling or falling off of the hydrogen storage material during winding.
【図１】 本発明の実施の形態の二次電池の芯材及び負
極板の構成及び構造を説明する負極板の断面図である。FIG. 1 is a cross-sectional view of a negative electrode plate illustrating a configuration and a structure of a core material and a negative electrode plate of a secondary battery according to an embodiment of the present invention.
【図２】 本発明の実施の形態の二次電池の芯材の構造
及び形状を説明する芯材の斜視図である。FIG. 2 is a perspective view of a core material for explaining a structure and a shape of the core material of the secondary battery according to the embodiment of the present invention.
【図３】 本発明の実施の形態の二次電池の芯材の製造
方法を説明する製造装置の概略構成図である。FIG. 3 is a schematic configuration diagram of a manufacturing apparatus for explaining a method of manufacturing a core material of a secondary battery according to an embodiment of the present invention.
【図４】 本発明の実施の形態の二次電池の負極板の製
造方法を説明する製造装置の概略構成図である。FIG. 4 is a schematic configuration diagram of a manufacturing apparatus illustrating a method for manufacturing a negative electrode plate of a secondary battery according to an embodiment of the present invention.
【図５】 本発明の実施の形態の二次電池の負極板の他
の製造方法を説明する製造装置の概略構成図である。FIG. 5 is a schematic configuration diagram of a manufacturing apparatus for explaining another method for manufacturing the negative electrode plate of the secondary battery according to the embodiment of the present invention.
【図６】 二次電池の構成及び構造を説明する二次電池
の分解斜視図である。FIG. 6 is an exploded perspective view of the secondary battery illustrating the configuration and structure of the secondary battery.
【図７】 従来の負極板の構成及び構造を説明する負極
板の断面図である。FIG. 7 is a cross-sectional view of a negative electrode plate for explaining the configuration and structure of a conventional negative electrode plate.
２１ 負極板 ２２ 芯材 ２３ 水素吸蔵材 ２４ 突起部 ２５ 孔部 ２６ 水素吸蔵合金粉末 ４１、４２ 圧延ローラ（ローラ） ４３ 粉末供給用ローラ Reference Signs List 21 negative electrode plate 22 core material 23 hydrogen storage material 24 projection 25 hole 26 hydrogen storage alloy powder 41, 42 rolling roller (roller) 43 powder supply roller
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０１Ｍ 4/80 Ｈ０１Ｍ 4/80 Ｂ (72)発明者 新井 一人 神奈川県横浜市磯子区新中原町１番地 石 川島播磨重工業株式会社機械・プラント開 発センター内 (72)発明者 小川 栄一 神奈川県横浜市磯子区新中原町１番地 石 川島播磨重工業株式会社機械・プラント開 発センター内 (72)発明者 野村 昭博 神奈川県横浜市磯子区新中原町１番地 石 川島播磨重工業株式会社機械・プラント開 発センター内 (72)発明者 榎園 二三男 神奈川県横浜市磯子区新中原町１番地 石 川島播磨重工業株式会社機械・プラント開 発センター内 Ｆターム(参考） 5H003 AA01 AA02 AA08 BB02 BB11 BC01 5H016 AA03 AA06 BB01 BB05 BB06 BB08 BB09 BB19 EE01 EE09 5H017 AA02 AS01 AS10 BB01 BB04 BB06 BB09 BB11 BB12 BB14 CC05 CC27 DD01 DD08 EE01 EE04 HH05 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H01M 4/80 H01M 4/80 B (72) Inventor Hitoshi Arai 1 Shinnakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Ishikawashima-Harima Heavy Industries Co., Ltd. Machinery & Plant Development Center (72) Inventor Eiichi Ogawa 1 Shinkaharacho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Ishikawajima-Harima Heavy Industries Co., Ltd. Machinery & Plant Development Center (72) Inventor Nomura Akihiro Ishikawashima-Harima Heavy Industries Co., Ltd., Machinery & Plant Development Center, No. 1 Shin-Nakahara-cho, Isogo-ku, Yokohama, Kanagawa Prefecture・ F-term in plant development center (reference) 5H003 AA01 AA02 AA08 BB02 BB11 BC0 1 5H016 AA03 AA06 BB01 BB05 BB06 BB08 BB09 BB19 EE01 EE09 5H017 AA02 AS01 AS10 BB01 BB04 BB06 BB09 BB11 BB12 BB14 CC05 CC27 DD01 DD08 EE01 EE04 HH05
Claims (15)
回された負極板あるいは正極板を構成する金属板からな
る芯材であって、 表面が非平面形状とされていることを特徴とする二次電
池の芯材。1. A core material comprising a metal plate constituting a negative electrode plate or a positive electrode plate laminated and wound inside a secondary battery, wherein the surface has a non-planar shape. Core material of the secondary battery.
により非平面形状とされていることを特徴とする請求項
１記載の二次電池の芯材。2. The secondary battery core according to claim 1, wherein the metal plate has a non-planar shape by providing a projection on the surface.
ていることを特徴とする請求項２記載の二次電池の芯
材。3. The core material for a secondary battery according to claim 2, wherein the protrusion is formed directly on the metal plate.
方向への前記突起部の占有率よりも、長手方向に直交す
る幅方向への前記突起部の占有率が高くされていること
を特徴とする請求項２または請求項３記載の二次電池の
芯材。4. The occupancy rate of the projections in the width direction orthogonal to the longitudinal direction is higher than the occupancy rate of the projections in the longitudinal direction that is the winding direction of the metal plate. The core material of the secondary battery according to claim 2 or 3, wherein:
列されていることを特徴とする請求項２〜４のいずれか
１項記載の二次電池の芯材。5. The core material for a secondary battery according to claim 2, wherein the protrusions are arranged at substantially equal intervals in an aligned state.
られていることを特徴とする請求項２〜５のいずれか１
項記載の二次電池の芯材。6. The metal sheet according to claim 2, wherein the protrusions are provided on both sides of the metal plate.
The core material of the secondary battery according to the item.
ある長手方向に沿って交互に前記金属板の表裏から突出
されていることを特徴とする請求項６記載の二次電池の
芯材。7. The secondary battery according to claim 6, wherein the protrusions alternately protrude from the front and back of the metal plate along a longitudinal direction that is a winding direction of the metal plate. Core material.
部が形成され、該孔部の縁部が前記突起部とされている
ことを特徴とする請求項２〜７のいずれか１項記載の二
次電池の芯材。8. The metal plate according to claim 2, wherein a hole having a raised edge is formed in the metal plate, and the edge of the hole is the protrusion. The core material of the secondary battery according to the item.
電池の芯材の表面に、水素吸蔵合金粉末または該水素吸
蔵合金粉末とバインダーとを混合させた混合材からなる
水素吸蔵材を設けたことを特徴とする二次電池の負極
板。9. A hydrogen storage material comprising a hydrogen storage alloy powder or a mixed material obtained by mixing the hydrogen storage alloy powder and a binder on the surface of the core material of the secondary battery according to claim 1. A negative electrode plate for a secondary battery, comprising a material.
粉末からなり、前記芯材がニッケルまたはニッケル合金
から形成されていることを特徴とする請求項９記載の二
次電池の負極板。10. The negative electrode plate for a secondary battery according to claim 9, wherein said hydrogen storage alloy powder is made of a nickel alloy powder, and said core material is made of nickel or a nickel alloy.
ニッケル合金粉末であることを特徴とする請求項９また
は請求項１０記載の二次電池の負極板。11. The negative electrode plate for a secondary battery according to claim 9, wherein the binder is a nickel powder or a nickel alloy powder.
巻回される負極板あるいは正極板を構成する金属板から
なる芯材の製造方法であって、 前記芯材を構成する金属粉末からなる芯材材料を圧延し
て板状に成形する成形工程と、 該板状に成形した芯材材料を焼結させる焼結工程と、 該焼結工程の前もしくは後に、前記板状に形成した芯材
材料の表面を非平面形状に形成する形成工程とを行うこ
とを特徴とする二次電池の芯材の製造方法。12. A method for producing a core material comprising a metal plate constituting a negative electrode plate or a positive electrode plate which is laminated and wound inside a secondary battery, wherein the metal powder comprises a metal powder constituting the core material. Forming the core material into a plate by rolling; forming a sintering step of sintering the core material formed into the plate; and forming the plate into the plate before or after the sintering step. Forming a surface of the core material into a non-planar shape.
次電池の芯材を、その表面に水素吸蔵合金粉末または該
水素吸蔵合金粉末とバインダーとを混合させた混合材か
らなる水素吸蔵材を介在させ、一対のローラ間へ通すこ
とにより加圧し、前記芯材の表面に前記水素吸蔵材を付
着させることを特徴とする二次電池の負極板の製造方
法。13. The hydrogen comprising a core material of the secondary battery according to claim 1 and a hydrogen storage alloy powder or a mixed material obtained by mixing the hydrogen storage alloy powder and a binder on the surface of the core material. A method for manufacturing a negative electrode plate for a secondary battery, comprising: applying pressure by passing an occlusion material between a pair of rollers to attach the hydrogen occlusion material to a surface of the core material.
着させた後に、電圧が印加された一対のローラ間へ通し
て通電加熱させることにより、前記水素吸蔵合金粉末同
士及び前記水素吸蔵合金粉末と芯材とを拡散接合させる
ことを特徴とする請求項１３記載の二次電池の負極板の
製造方法。14. After the hydrogen-absorbing material is attached to the surface of the core material, the hydrogen-absorbing alloy powder and the hydrogen-absorbing alloy are passed through a pair of rollers to which a voltage has been applied and heated by energization. The method for producing a negative electrode plate of a secondary battery according to claim 13, wherein the powder and the core material are diffusion-bonded.
次電池の芯材を、その表面に水素吸蔵合金粉末または該
水素吸蔵合金粉末とバインダーとを混合させた混合材か
らなる水素吸蔵材を介在させ、電圧が印加された一対の
ローラ間へ通すことにより加圧するとともに通電加熱さ
せ、前記芯材の表面に前記水素吸蔵材を付着させるとと
もに前記水素吸蔵合金粉末同士及び前記水素吸蔵合金粉
末と芯材とを拡散接合させることを特徴とする二次電池
の負極板の製造方法。15. A hydrogen material comprising the core material of the secondary battery according to claim 1 and a hydrogen storage alloy powder or a mixed material obtained by mixing the hydrogen storage alloy powder and a binder on the surface of the core material. The storage material is interposed between the pair of rollers to which a voltage is applied, and the pressure is applied and electric heating is performed to adhere the hydrogen storage material to the surface of the core material and to form the hydrogen storage alloy powders and the hydrogen storage alloy. A method for producing a negative electrode plate for a secondary battery, comprising: diffusion bonding an alloy powder and a core material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18685799A JP3687423B2 (en) | 1999-06-30 | 1999-06-30 | Method for manufacturing negative electrode plate of secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18685799A JP3687423B2 (en) | 1999-06-30 | 1999-06-30 | Method for manufacturing negative electrode plate of secondary battery |
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| Publication Number | Publication Date |
|---|---|
| JP2001015117A true JP2001015117A (en) | 2001-01-19 |
| JP3687423B2 JP3687423B2 (en) | 2005-08-24 |
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|---|---|---|---|
| JP18685799A Expired - Fee Related JP3687423B2 (en) | 1999-06-30 | 1999-06-30 | Method for manufacturing negative electrode plate of secondary battery |
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