JP2011081949A - Sealed battery - Google Patents

Sealed battery Download PDF

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JP2011081949A
JP2011081949A JP2009231501A JP2009231501A JP2011081949A JP 2011081949 A JP2011081949 A JP 2011081949A JP 2009231501 A JP2009231501 A JP 2009231501A JP 2009231501 A JP2009231501 A JP 2009231501A JP 2011081949 A JP2011081949 A JP 2011081949A
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external connection
negative electrode
positive electrode
screw
joined
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JP5470603B2 (en
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Chikaichi Jinushi
親市 地主
Yoshinori Tanaka
田中　　義則
Hideyuki Sugiyama
秀幸 杉山
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Eliiy Power Co Ltd
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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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Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealed battery manufacturable at reduced cost and having low internal resistance. <P>SOLUTION: The sealed battery includes a positive electrode connecting terminal and a negative electrode connecting terminal joined to a lid member through an insulating member, a separator, a positive electrode and a negative electrode arranged through the separator, and an electrolyte, inside a case to which the lid member is joined. The positive electrode and the negative electrode are connected to the positive electrode connecting terminal and the negative electrode connecting terminal respectively, the positive electrode connecting terminal and the negative electrode connecting terminal penetrate through the lid member, and each has a plate-like outside connecting part which partitions the case joined to the lid member into the outside and the inside, the outside connecting part is joined to a screw member penetrating through a part of the outside connecting part, and the screw member has a screw part fastening either one of a nut and a bolt and a caulking part joined with the outside connecting part by caulking structure. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、密閉型電池に関する。   The present invention relates to a sealed battery.

近年、密閉型電池は、様々な用途に用いられ、特に大型の密閉型電池は、電気自動車用電源や電力貯蔵などの用途に用いられている。
このような大型の密閉型電池には、様々な改良が求められている。特に電極端子の構造および電極端子と外部配線の接続においては、内部抵抗の低減、製造コストの低減、軽量化、電極端子と外部配線の電気的接続の確実性などが求められている。
そこで、リベット端子と集電接続体とを強固に接続することにより内部抵抗を低減することができる二次電池が提案されている（例えば、特許文献１参照）。 In recent years, sealed batteries have been used for various applications, and particularly large sealed batteries have been used for applications such as electric vehicle power supplies and power storage.
Various improvements are required for such a large sealed battery. In particular, in the structure of the electrode terminal and the connection between the electrode terminal and the external wiring, reduction in internal resistance, reduction in manufacturing cost, weight reduction, reliability of electrical connection between the electrode terminal and external wiring, and the like are required.
Thus, a secondary battery has been proposed that can reduce internal resistance by firmly connecting a rivet terminal and a current collector connector (see, for example, Patent Document 1).

特開２００４−１４１７３号公報JP 2004-14173 A

しかし、従来の電池では、電池内部の発電要素と接続する集電接続体と外部配線に接続する電極端子が別の部材であったため、その異なる部材の接触部分で接触抵抗が生じ、内部抵抗を増加させている。
また、従来の電池では、電極端子と外部配線を接触させるために雌ネジ構造などが電極端子に直接形成されているため、電極端子の原材料に金属塊を使用する必要があり、製造コストの増加および電池重量の増加につながっている。
また、従来の電池では、電極端子と外部配線を接触させ、この接触状態をボルト−ナット構造による締め付け力で維持する場合に、この締め付け構造内に樹脂、又はゴムなどの高温安定性または耐久性の低い部材を使用する場合があり、この場合、電池が熱を持ち温度が上昇した場合や長期間電池を使用した場合に電極端子と外部配線とを接触させるボルトおよびナットがゆるんでしまい電極端子と外部配線との接触抵抗が大きくなるおそれがある。
本発明は、このような事情に鑑みてなされたものであり、低減された製造コストで製造でき、小さい内部抵抗を有する密閉型電池を提供する。 However, in the conventional battery, since the current collector connection body connected to the power generation element inside the battery and the electrode terminal connected to the external wiring are separate members, contact resistance is generated at the contact portion of the different members, and the internal resistance is reduced. It is increasing.
In addition, in the conventional battery, since a female screw structure or the like is directly formed on the electrode terminal to bring the electrode terminal into contact with the external wiring, it is necessary to use a metal lump as a raw material for the electrode terminal, which increases the manufacturing cost. And led to an increase in battery weight.
In addition, in the conventional battery, when the electrode terminal and the external wiring are brought into contact with each other and the contact state is maintained by the tightening force by the bolt-nut structure, the high temperature stability or durability of resin or rubber is included in the tightening structure. In this case, when the battery heats up and the temperature rises, or when the battery is used for a long time, the bolts and nuts that contact the electrode terminal and external wiring loosen and the electrode terminal There is a risk that the contact resistance between the wiring and the external wiring increases.
The present invention has been made in view of such circumstances, and provides a sealed battery that can be manufactured at a reduced manufacturing cost and has a small internal resistance.

本発明は、蓋部材を接合したケースの内部に、絶縁部材を介して前記蓋部材とそれぞれ接合した正極接続端子および負極接続端子と、セパレータと、前記セパレータを介して配置された正極および負極と、電解液とを備え、前記正極および負極は、それぞれ前記正極接続端子および負極接続端子に接続され、前記正極接続端子および負極接続端子は、それぞれ前記蓋部材を貫通し、かつ、前記蓋部材と接合した前記ケースの外部と内部とを仕切る板状の外部接続部をそれぞれ有し、前記外部接続部は、この一部を貫通するねじ部材と接合し、前記ねじ部材は、ナットおよびボルトのいずれか一方と締め合うことができるねじ部、ならびに前記外部接続部とカシメ構造により接合するカシメ部を有することを特徴とする密閉型電池を提供する。   The present invention includes a positive electrode connecting terminal and a negative electrode connecting terminal which are respectively bonded to the lid member via an insulating member, a separator, and a positive electrode and a negative electrode which are arranged via the separator, in a case where the lid member is bonded. The positive electrode and the negative electrode are connected to the positive electrode connection terminal and the negative electrode connection terminal, respectively, and the positive electrode connection terminal and the negative electrode connection terminal pass through the lid member, respectively, and the lid member Each of the cases has a plate-like external connection part that partitions the outside and the inside of the case, and the external connection part is joined to a screw member that penetrates a part of the case. Provided is a sealed battery having a screw part that can be fastened to either side and a caulking part that is joined to the external connection part by a caulking structure.

本発明によれば、電池内部の発電要素との接続から電池外部の外部配線の接続までを１つの部材で行うことができるため、電池の内部抵抗を低減することができる。
また、ねじ部材が正極接続端子および負極接続端子の外部接続部にそれぞれカシメ構造により接合するため、正極接続端子および負極接続端子に加工した金属板を用いることができ、製造コストを低減することができる。
また、本発明によれば、正極接続端子または負極接続端子、外部配線、ねじ部材のねじ部およびねじ部に対応するボルトまたはナットをすべて金属製のものを用いることができるため、温度の上昇などによりボルトおよびナットの締め合わせが緩むことを防止することができる。
また、本発明によれば、電池外部と電池内部を仕切る外部接続部を正極接続端子および負極接続端子がそれぞれ有するため、蓋部材と正極接続端子の外部接続部および負極接続端子の外部接続部との重複部分を無くすことができ、軽量化、低コスト化を図ることができる。 According to the present invention, since the connection from the power generation element inside the battery to the connection of the external wiring outside the battery can be performed with one member, the internal resistance of the battery can be reduced.
Further, since the screw members are joined to the external connection portions of the positive electrode connection terminal and the negative electrode connection terminal by caulking structures, respectively, metal plates processed into the positive electrode connection terminal and the negative electrode connection terminal can be used, which can reduce the manufacturing cost. it can.
In addition, according to the present invention, since all of the bolts or nuts corresponding to the positive electrode connection terminal or the negative electrode connection terminal, the external wiring, the screw portion of the screw member, and the screw portion can be used, the temperature rises, etc. Thus, loosening of the bolt and nut can be prevented.
Further, according to the present invention, since the positive electrode connection terminal and the negative electrode connection terminal each have an external connection part that partitions the battery outside and the battery inside, the lid member, the external connection part of the positive electrode connection terminal, and the external connection part of the negative electrode connection terminal, Can be eliminated, and the weight and cost can be reduced.

（ａ）は本発明の一実施形態の密閉型電池の構成を示す概略斜視図であり、（ｂ）はその概略断面図であり、（ｃ）は（ｂ）の点線で囲んだ範囲ＡまたはＢの拡大図である。(A) is a schematic perspective view which shows the structure of the sealed battery of one Embodiment of this invention, (b) is the schematic sectional drawing, (c) is the range A enclosed with the dotted line of (b), or FIG. 本発明の一実施形態の密閉型電池に含まれる発電要素の構成を示す説明図である。It is explanatory drawing which shows the structure of the electric power generation element contained in the sealed battery of one Embodiment of this invention. （ａ）は本発明の一実施形態の密閉型電池に含まれるねじ部材の外部接続部と接合する前の構成を示す概略斜視図であり、（ｂ）はその概略側面図であり、（ｃ）は（ｂ）に示した点線Ａ−Ａの概略断面図であり、（ｄ）は（ｂ）に示した点線Ｂ−Ｂの概略断面図であり、（ｅ）は本発明の他の実施形態の密閉型電池に含まれるねじ部材の概略断面図である。(A) is a schematic perspective view which shows the structure before joining with the external connection part of the screw member contained in the sealed battery of one Embodiment of this invention, (b) is the schematic side view, (c ) Is a schematic cross-sectional view taken along the dotted line AA shown in (b), (d) is a schematic cross-sectional view taken along the dotted line BB shown in (b), and (e) is another embodiment of the present invention. It is a schematic sectional drawing of the screw member contained in the sealed battery of a form. （ａ）は本発明の一実施形態の密閉型電池に含まれるねじ部材の外部接続部と接合する前の構成を示す概略斜視図であり、（ｂ）はその概略側面図であり、（ｃ）および（ｄ）は（ｂ）に示した点線Ａ−Ａの概略断面図であり、（ｅ）は（ｂ）に示した点線Ｂ−Ｂの概略断面図であり、（ｆ）は本発明の他の実施形態の密閉型電池に含まれるねじ部材の概略断面図である。(A) is a schematic perspective view which shows the structure before joining with the external connection part of the screw member contained in the sealed battery of one Embodiment of this invention, (b) is the schematic side view, (c ) And (d) are schematic cross-sectional views taken along the dotted line AA shown in (b), (e) is a schematic cross-sectional view taken along the dotted line BB shown in (b), and (f) is the present invention. It is a schematic sectional drawing of the screw member contained in the sealed battery of other embodiment. （ａ）は本発明の一実施形態の密閉型電池に含まれる外部接続金属板を示す概略平面図であり、（ｂ）はその外部接続金属板と正極接続端子または負極接続端子とを接触するように固定した状態を示す概略断面図である。(A) is a schematic plan view which shows the external connection metal plate contained in the sealed battery of one Embodiment of this invention, (b) contacts the external connection metal plate, a positive electrode connection terminal, or a negative electrode connection terminal. It is a schematic sectional drawing which shows the state fixed so. （ａ）および（ｂ）は本発明の一実施形態の密閉型電池に含まれるねじ部材と正極接続端子または負極接続端子とをカシメ構造により接合する方法を示す説明図である。(A) And (b) is explanatory drawing which shows the method of joining the screw member and the positive electrode connection terminal or negative electrode connection terminal which are contained in the sealed battery of one Embodiment of this invention by a crimping structure.

本発明の密閉型電池は、蓋部材を接合したケースの内部に、絶縁部材を介して前記蓋部材とそれぞれ接合した正極接続端子および負極接続端子と、セパレータと、前記セパレータを介して配置された正極および負極と、電解液とを備え、前記正極および負極は、それぞれ前記正極接続端子および負極接続端子に接続され、前記正極接続端子および負極接続端子は、それぞれ前記蓋部材を貫通し、かつ、前記蓋部材と接合した前記ケースの外部と内部とを仕切る板状の外部接続部をそれぞれ有し、前記外部接続部は、この一部を貫通するねじ部材と接合し、前記ねじ部材は、ナットおよびボルトのいずれか一方と締め合うことができるねじ部、ならびに前記外部接続部とカシメ構造により接合するカシメ部を有することを特徴とする。   The sealed battery of the present invention is disposed in a case where a lid member is joined, with a positive electrode connection terminal and a negative electrode connection terminal respectively joined to the lid member via an insulating member, a separator, and the separator. A positive electrode and a negative electrode; and an electrolyte solution, wherein the positive electrode and the negative electrode are connected to the positive electrode connection terminal and the negative electrode connection terminal, respectively, the positive electrode connection terminal and the negative electrode connection terminal penetrate the lid member, and Each of the cases has a plate-like external connection part that partitions the outside and the inside of the case joined to the lid member, and the external connection part is joined to a screw member that penetrates a part thereof, and the screw member is a nut. And a screw part that can be fastened to either one of the bolts and a caulking part that is joined to the external connection part by a caulking structure.

密閉型電池とは、密閉された構造を有する電池である。
ケースとは、正極、負極、セパレータおよび電解液を収容するケースであり、蓋部材と接合する。
蓋部材とは、ケースと接合し、電池を密閉することができる部材である。 A sealed battery is a battery having a sealed structure.
The case is a case that accommodates the positive electrode, the negative electrode, the separator, and the electrolyte, and is joined to the lid member.
The lid member is a member that can be joined to the case and seal the battery.

正極接続端子とは、電池内部で正極と接続し、電池外部で外部配線と接続することができる接続端子である。
負極接続端子とは、電池内部で負極と接続し、電池外部で外部配線と接続することができる接続端子である。
電解液とは、電池内部に満たされ、正極および負極と電池反応をすることができる電解液である。
ねじ部材とは、正極接続端子および負極接続端子のいずれか１つと外部配線とを接続、固定するための部材である。
なお、本発明において、「ボルト」は、雄ネジ構造を有する部分または雄ネジ構造を有するものという。また、「ナット」は、雌ネジ構造を有する部分または雌ネジ構造を有するものという。また、「ねじ」は、「ボルト」または「ナット」あるいはその両方をいう。 The positive electrode connection terminal is a connection terminal that can be connected to the positive electrode inside the battery and can be connected to external wiring outside the battery.
The negative electrode connection terminal is a connection terminal that can be connected to the negative electrode inside the battery and can be connected to external wiring outside the battery.
The electrolytic solution is an electrolytic solution that fills the inside of the battery and can cause a battery reaction with the positive electrode and the negative electrode.
The screw member is a member for connecting and fixing any one of the positive electrode connection terminal and the negative electrode connection terminal and the external wiring.
In the present invention, a “bolt” is a part having a male screw structure or a part having a male screw structure. Further, the “nut” is said to have a part having a female screw structure or a female screw structure. “Screw” refers to “bolt”, “nut”, or both.

本発明の密閉型電池において、前記ねじ部材は、前記外部に面した第１面および前記内部に面した第２面を有するフランジ部をさらに有することが好ましい。
このような構成によれば、前記ねじ部材と前記外部接続部とをカシメ構造により接合するとき、ねじ部の塑性変形を防止することができる。 In the sealed battery according to the aspect of the invention, it is preferable that the screw member further includes a flange portion having a first surface facing the outside and a second surface facing the inside.
According to such a structure, when the said screw member and the said external connection part are joined by a crimping structure, the plastic deformation of a screw part can be prevented.

本発明の密閉型電池において、前記ねじ部は、雄ネジ構造を有しかつ第１面の上に設けられ、前記カシメ部は、第２面上に設けられることが好ましい。
このような構成によれば、カシメ部を前記外部接続部に貫通させ、カシメ構造によりカシメ部と前記外部接続部を接合することができ、ねじ部は、前記外部のナットと締め合わせることにより、外部接続部と外部配線とを接触するように固定させることができる。 In the sealed battery according to the aspect of the invention, it is preferable that the screw portion has a male screw structure and is provided on the first surface, and the caulking portion is provided on the second surface.
According to such a configuration, the caulking portion can be passed through the external connection portion, and the caulking portion and the external connection portion can be joined by the caulking structure, and the screw portion is fastened with the external nut, The external connection portion and the external wiring can be fixed so as to contact each other.

本発明の密閉型電池において、前記ねじ部は、前記ねじ部材に設けられた雌ネジ構造を有する部分であり、前記フランジ部は、前記ねじ部材の一方の端に設けられ、前記カシメ部は、前記ねじ部材の他方の端に設けられることが好ましい。
このような構成によれば、カシメ部を前記外部接続部に貫通させ、カシメ構造によりカシメ部と前記外部接続部を接合することができ、ねじ部は、前記外部のボルトと締め合わせることにより、外部接続部と外部配線とを接触するように固定させることができる。 In the sealed battery of the present invention, the screw portion is a portion having a female screw structure provided in the screw member, the flange portion is provided at one end of the screw member, and the crimping portion is It is preferable to be provided at the other end of the screw member.
According to such a configuration, the caulking portion can be passed through the external connection portion, and the caulking portion and the external connection portion can be joined by the caulking structure, and the screw portion is fastened with the external bolt, The external connection portion and the external wiring can be fixed so as to contact each other.

本発明の密閉型電池において、前記ねじ部材は、第２面上に凸部を有し、前記外部接続部は、前記フランジ部の外周部分と接触するように塑性変形した形状を有することが好ましい。
このような構成によれば、外部接続部を凸部の形状に対応する形状とすることができ、ねじ部材とそれに対応するナットまたはボルトと締め合わせたときにねじ部材の共回りを防止することができる。 In the sealed battery according to the aspect of the invention, it is preferable that the screw member has a convex portion on the second surface, and the external connection portion has a shape plastically deformed so as to be in contact with an outer peripheral portion of the flange portion. .
According to such a configuration, the external connection portion can have a shape corresponding to the shape of the convex portion, and when the screw member and the corresponding nut or bolt are fastened together, the screw member can be prevented from rotating together. Can do.

本発明の密閉型電池において、第１面は、前記外部接続部の前記外部に面した外側面と同一面上の面または前記外側面よりも前記内部に近い面であることが好ましい。
このような構成によれば、前記外部接続部を外部配線と接触しやすくすることができ、部品数を低減することができ、製造コストを低減することができる。 In the sealed battery according to the aspect of the invention, it is preferable that the first surface is a surface on the same surface as the outer surface facing the outside of the external connection portion or a surface closer to the inside than the outer surface.
According to such a configuration, the external connection portion can be easily brought into contact with the external wiring, the number of parts can be reduced, and the manufacturing cost can be reduced.

本発明の密閉型電池において、前記外部接続部と前記カシメ部との境界部分を覆う樹脂部材をさらに有することが好ましい。
このような構成にすれば、前記外部接続部と前記カシメ部との間のわずかな隙間をふさぐことができ、密閉性を向上することができる。 The sealed battery of the present invention preferably further includes a resin member that covers a boundary portion between the external connection portion and the crimping portion.
With such a configuration, a slight gap between the external connection portion and the caulking portion can be closed, and the sealing performance can be improved.

本発明の密閉型電池において、前記外部接続部に電気的に接続する外部配線でありかつ開口を有する外部接続金属板をさらに有し、前記外部接続金属板は、前記開口にボルトを通し前記ねじ部とそれに対応するナットまたはボルトとを締め合わせるにより前記外部接続部と接触するように固定され、前記外部接続金属板は、無光沢ニッケルメッキ層を表面に有することが好ましい。
このような構成にすれば、前記外部接続部と外部接続金属板を接触させることができる。また、前記外部接続金属板が無光沢ニッケルメッキ層を表面に有することにより、正極接続端子や負極接続端子に接続表面の劣化が懸念される金属が用いられたときに前記外部接続金属板と正極接続端子または負極接続端子との界面での接触不良や接触抵抗の増大が生じることを抑制することができる。 The sealed battery of the present invention further includes an external connection metal plate that is an external wiring electrically connected to the external connection portion and has an opening, and the external connection metal plate passes the bolt through the opening and the screw. Preferably, the external connection metal plate has a matte nickel plating layer on the surface thereof, and is fixed to come into contact with the external connection portion by tightening a portion and a corresponding nut or bolt.
With such a configuration, the external connection portion and the external connection metal plate can be brought into contact with each other. In addition, when the external connection metal plate has a matte nickel plating layer on the surface, the external connection metal plate and the positive electrode are used when a metal that may be deteriorated in the connection surface is used for the positive electrode connection terminal or the negative electrode connection terminal. It is possible to suppress the occurrence of contact failure or increase in contact resistance at the interface with the connection terminal or the negative electrode connection terminal.

本発明の密閉型電池において、前記正極は、リチウムを含む正極活物質層を有し、前記負極は、グラファイトを含む負極活物質層を有し、前記電解液は、リチウム塩溶質を有機溶媒に溶解した溶液であることが好ましい。
この構成により、本発明の密閉型電池をリチウムイオン二次電池とすることができる。 In the sealed battery of the present invention, the positive electrode has a positive electrode active material layer containing lithium, the negative electrode has a negative electrode active material layer containing graphite, and the electrolytic solution uses a lithium salt solute as an organic solvent. A dissolved solution is preferred.
With this configuration, the sealed battery of the present invention can be a lithium ion secondary battery.

以下、本発明の一実施形態を図面を用いて説明する。図面や以下の記述中で示す構成は、例示であって、本発明の範囲は、図面や以下の記述中で示すものに限定されない。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The configurations shown in the drawings and the following description are merely examples, and the scope of the present invention is not limited to those shown in the drawings and the following description.

密閉型電池の構成
図１は本発明の一実施形態の密閉型電池の構成を示す概略斜視図などである。図２は、発電要素の構成を示す説明図であり、図３、図４は本発明の一実施形態の密閉型電池に含まれるねじ部材の外部接続部と接合する前の構成を示す概略斜視図などである。図５は、本発明の一実施形態の密閉型電池に含まれる外部接続金属板を示す概略平面図などである。 Diagram 1 of the sealed type battery is like schematic perspective view showing the configuration of a sealed battery according to one embodiment of the present invention. FIG. 2 is an explanatory view showing the configuration of the power generation element, and FIGS. 3 and 4 are schematic perspective views showing the configuration before joining to the external connection portion of the screw member included in the sealed battery according to the embodiment of the present invention. It is a figure. FIG. 5 is a schematic plan view showing an external connection metal plate included in the sealed battery according to the embodiment of the present invention.

本実施形態の密閉型電池２０は、蓋部材２を接合したケース１の内部に、絶縁部材１０を介して蓋部材２とそれぞれ接合した正極接続端子３および負極接続端子４と、セパレータ２４と、セパレータ２４を介して配置された正極２１および負極２２と、電解液とを備え、正極２１および負極２２は、それぞれ正極接続端子３および負極接続端子４に接続され、正極接続端子３および負極接続端子４は、それぞれ蓋部材２を貫通し、かつ、蓋部材２と接合したケース１の外部と内部とを仕切る板状の外部接続部８をそれぞれ有し、外部接続部８は、この一部を貫通するねじ部材６と接合し、ねじ部材６は、ナットおよびボルトのいずれか一方と締め合うことができるねじ部３１、ならびに外部接続部８とカシメ構造により接合するカシメ部３２を有することを特徴とする。   The sealed battery 20 according to the present embodiment includes a positive electrode connection terminal 3 and a negative electrode connection terminal 4 respectively bonded to the lid member 2 via the insulating member 10 inside the case 1 to which the lid member 2 is bonded, a separator 24, A positive electrode 21 and a negative electrode 22 arranged via a separator 24, and an electrolyte solution are provided. The positive electrode 21 and the negative electrode 22 are connected to the positive electrode connection terminal 3 and the negative electrode connection terminal 4, respectively, and the positive electrode connection terminal 3 and the negative electrode connection terminal 4 have plate-like external connection portions 8 that respectively penetrate the lid member 2 and separate the outside and the inside of the case 1 joined to the lid member 2, and the external connection portion 8 is a part of this. The threaded member 6 is joined to the threaded member 6 that passes therethrough, and the threaded member 6 can be fastened to either the nut or the bolt, and the crimped part 32 joined to the external connecting part 8 by a crimped structure. Characterized in that it has.

また、本実施形態の密閉型電池２０に含まれるねじ部材６は、前記外部に面する第１面３７および前記内部に面する第２面３８を有するフランジ部３３をさらに有してもよい。
また、本実施形態の密閉型電池２０は、外部接続部８とカシメ部３２との境界部分を覆う樹脂部材１５をさらに有してもよい。
また、本実施形態の密閉型電池２０は、外部接続部８に電気的に接続する外部配線でありかつ開口４６を有する外部接続金属板４５をさらに有してもよい。
以下、本実施形態の密閉型電池について説明する。 The screw member 6 included in the sealed battery 20 of the present embodiment may further include a flange portion 33 having a first surface 37 facing the outside and a second surface 38 facing the inside.
Further, the sealed battery 20 of the present embodiment may further include a resin member 15 that covers a boundary portion between the external connection portion 8 and the caulking portion 32.
The sealed battery 20 of the present embodiment may further include an external connection metal plate 45 that is an external wiring that is electrically connected to the external connection portion 8 and that has an opening 46.
Hereinafter, the sealed battery of this embodiment will be described.

１．密閉型電池
本実施形態の密閉型電池２０は、密閉された構造を有する電池であり、例えば、リチウムイオン二次電池、ニッケル・水素二次電池、ニッケル・カドミウム二次電池等である。 1. Sealed battery The sealed battery 20 of the present embodiment is a battery having a sealed structure, such as a lithium ion secondary battery, a nickel / hydrogen secondary battery, or a nickel / cadmium secondary battery.

２．発電要素
発電要素１２はセパレータ２４を介して配置された正極２１および負極２２を備える。発電要素１２はセパレータ２４を介して交互に配置された正極２１および負極２２を備えるもよい。発電要素１２は、図２のようにスタック構造を有してもよく、また、捲回構造であってもよい。また、正極２１は、正極集電体２７上に正極活物質層２５が形成された構造を有してもよい。また、負極２２は、負極集電体２８上に負極活物質層２６が形成された構造を有してもよい。
発電要素１２は、ケース内部に充填された電解液と共に電池反応をする。この電池反応により本実施形態の密閉型電池は、放電、充電をすることができる。 2. Power Generation Element The power generation element 12 includes a positive electrode 21 and a negative electrode 22 arranged with a separator 24 interposed therebetween. The power generation element 12 may include positive electrodes 21 and negative electrodes 22 that are alternately arranged via separators 24. The power generation element 12 may have a stack structure as shown in FIG. 2 or may have a wound structure. The positive electrode 21 may have a structure in which the positive electrode active material layer 25 is formed on the positive electrode current collector 27. The negative electrode 22 may have a structure in which the negative electrode active material layer 26 is formed on the negative electrode current collector 28.
The power generation element 12 performs a battery reaction together with the electrolyte filled in the case. By this battery reaction, the sealed battery of this embodiment can be discharged and charged.

正極２１および負極２２は複数であってもよい。この場合、図２のようにセパレータ２４を介して複数の正極２１および複数の負極２２が交互に配置されてもよい。また、この場合、複数の正極２１の正極集電体２７は正極活物質層２５が形成されていない端部において束ねられ正極接続端子３に接合することができる。また、複数の負極２２の負極集電体２８は負極活物質層２６が形成されていない端部において束ねられ負極接続端子４に接合することができる。   The positive electrode 21 and the negative electrode 22 may be plural. In this case, a plurality of positive electrodes 21 and a plurality of negative electrodes 22 may be alternately arranged via separators 24 as shown in FIG. In this case, the positive electrode current collectors 27 of the plurality of positive electrodes 21 can be bundled and joined to the positive electrode connection terminal 3 at the end where the positive electrode active material layer 25 is not formed. The negative electrode current collectors 28 of the plurality of negative electrodes 22 can be bundled and joined to the negative electrode connection terminal 4 at the end where the negative electrode active material layer 26 is not formed.

正極集電体２７は、電気伝導性を有し、表面上に正極活物質層２５を備えることができれば、特に限定されないが、例えば、金属箔である。好ましくはアルミニウム箔である。また、正極集電体２７はシート形状であってもよく、正極活物質層２５は正極集電体２７の両面の上に形成されていてもよい。
正極活物質層２５は、正極活物質に導電剤、結着剤などを添加し、塗布法により正極集電体２７の上に形成することができる。正極活物質は、例えば、リチウム二次電池の場合、ＬｉＣｏＯ2、ＬｉＮｉＯ2、ＬｉＭｎ2Ｏ4またはＬｉＦｅＰＯ4である。 The positive electrode current collector 27 is not particularly limited as long as it has electrical conductivity and can have the positive electrode active material layer 25 on the surface. For example, the positive electrode current collector 27 is a metal foil. Aluminum foil is preferable. Further, the positive electrode current collector 27 may have a sheet shape, and the positive electrode active material layer 25 may be formed on both surfaces of the positive electrode current collector 27.
The positive electrode active material layer 25 can be formed on the positive electrode current collector 27 by a coating method by adding a conductive agent, a binder or the like to the positive electrode active material. For example, in the case of a lithium secondary battery, the positive electrode active material is LiCoO 2 , LiNiO 2 , LiMn 2 O 4 or LiFePO 4 .

負極集電体２８は、電気伝導性を有し、表面上に負極活物質層２６を備えることができれば、特に限定されないが、例えば、金属箔である。好ましくは銅箔である。また、負極集電体２８はシート形状であってもよく、負極活物質層２６は負極集電体２８の両面の上に形成されていてもよい。
負極活物質層２６は、負極活物質に導電剤、結着剤などを添加し、塗布法により負極集電体２８の上に形成することができる。負極活物質は、例えば、リチウム二次電池の場合、グラファイトである。
また、セパレータ２４の材料は、例えば、ポリオレフィンの微多孔性フィルムである。
また、電解液は、例えば密閉型電池２０がリチウムイオン二次電池の場合、電解質としてのＬｉＣＦ3ＳＯ3、ＬｉＡｓＦ6、ＬｉＣｌＯ4、ＬｉＢＦ4、ＬｉＰＦ6などのリチウム塩溶質を有機溶媒に溶解した溶液を用いることができる。 Although it will not specifically limit if the negative electrode collector 28 has electrical conductivity and can provide the negative electrode active material layer 26 on the surface, For example, it is metal foil. Copper foil is preferred. The negative electrode current collector 28 may be in the form of a sheet, and the negative electrode active material layer 26 may be formed on both surfaces of the negative electrode current collector 28.
The negative electrode active material layer 26 can be formed on the negative electrode current collector 28 by adding a conductive agent, a binder, or the like to the negative electrode active material and applying it. For example, in the case of a lithium secondary battery, the negative electrode active material is graphite.
The material of the separator 24 is, for example, a polyolefin microporous film.
In addition, for example, when the sealed battery 20 is a lithium ion secondary battery, the electrolyte solution is obtained by dissolving lithium salt solutes such as LiCF 3 SO 3 , LiAsF 6 , LiClO 4 , LiBF 4 , and LiPF 6 as an electrolyte in an organic solvent. A solution can be used.

３．ケース
ケース１は、内部に発電要素１２、正極接続端子３、負極接続端子４および電解液を有するケースであり、蓋部材２と接合すれば特に限定されない。
ケース１の材料は、内部に発電要素１２、正極接続端子３、負極接続端子４および電解液を収容しても大きく変形しない材料であれば特に限定されないが、例えば、アルミニウム、アルミニウム合金、鉄、ステンレス、硬質プラスチックなどである。 3. Case Case 1 is a case having a power generation element 12, a positive electrode connection terminal 3, a negative electrode connection terminal 4, and an electrolytic solution therein, and is not particularly limited as long as it is joined to the lid member 2.
The material of the case 1 is not particularly limited as long as it is a material that does not greatly deform even if the power generation element 12, the positive electrode connection terminal 3, the negative electrode connection terminal 4, and the electrolytic solution are accommodated therein. Stainless steel, hard plastic, etc.

４．蓋部材
蓋部材２は、ケース１と電解液が漏れないように接合し、正極接続端子３および負極接続端子４と絶縁部材１０を介して接合すれば特に限定されない。
蓋部材２とケース１とを接合する方法は、特に限定されないが、例えばレーザ溶接、抵抗溶接、超音波溶接、接着剤などによる接合である。
蓋部材２の材料は、蓋部材２とケース１とを接合しても大きく変形しない材料であれば特に限定されないが、例えば、ステンレス、鉄、硬質プラスチックなどである。 4). Lid member The lid member 2 is not particularly limited as long as it is joined to the case 1 so that the electrolyte does not leak, and is joined to the positive electrode connection terminal 3 and the negative electrode connection terminal 4 via the insulating member 10.
A method for joining the lid member 2 and the case 1 is not particularly limited, and for example, joining by laser welding, resistance welding, ultrasonic welding, an adhesive, or the like.
The material of the lid member 2 is not particularly limited as long as it is a material that does not greatly deform even when the lid member 2 and the case 1 are joined, and examples thereof include stainless steel, iron, and hard plastic.

５．正極接続端子および負極接続端子
正極接続端子３は電池内部で正極２１と接続し、蓋部材２を貫通し絶縁部材１０を介して蓋部材２と接合する。また、負極接続端子４は電池内部で負極２２と接続し、蓋部材２を貫通し絶縁部材１０を介して蓋部材２と接合する。
この構成により、正極接続端子３および負極接続端子４は、それぞれ発電要素と接続する部分と、外部配線と接続する部分を一つの部材で有することができ、接触抵抗などの電池内部の電気抵抗を小さくすることができる。また、発電要素１２から外部配線までの経路を短くすることができるため、電池内部の電気抵抗を小さくすることができる。さらに、電池の接続端子部分の部品数を少なくすることができ、製造コストを低減することができる。 5). Positive connection terminal and negative connection terminal The positive connection terminal 3 is connected to the positive electrode 21 inside the battery, penetrates the lid member 2 and is joined to the lid member 2 via the insulating member 10. Further, the negative electrode connection terminal 4 is connected to the negative electrode 22 inside the battery, penetrates the lid member 2, and is joined to the lid member 2 via the insulating member 10.
With this configuration, each of the positive electrode connection terminal 3 and the negative electrode connection terminal 4 can have a portion connected to the power generation element and a portion connected to the external wiring as a single member, and the electric resistance inside the battery such as contact resistance can be obtained. Can be small. Moreover, since the path | route from the electric power generation element 12 to external wiring can be shortened, the electrical resistance inside a battery can be made small. Furthermore, the number of parts in the connection terminal portion of the battery can be reduced, and the manufacturing cost can be reduced.

また、正極接続端子３および負極接続端子４は、蓋部材２と接合したケース１の外部と内部とを仕切りかつ前記外部に面した外側面１７と前記内部に面した内側面１８を有する板状の外部接続部８をそれぞれ有する。
この構成により、正極接続端子３および負極接続端子４を金属板を加工したものとすることができ、接続端子の製造コストを低減することができる。また、電池を軽量化することもできる。さらに、電池内部と電池外部を仕切る蓋部材２と正極接続端子３の外部接続部８または負極接続端子４の外部接続部８との重複部分をなくすことができ、製造コストの低減、電池の軽量化を図ることができる。 Further, the positive electrode connection terminal 3 and the negative electrode connection terminal 4 partition the outside and the inside of the case 1 joined to the lid member 2 and have an outer side surface 17 facing the outside and an inner side surface 18 facing the inside. External connection portions 8.
With this configuration, the positive electrode connection terminal 3 and the negative electrode connection terminal 4 can be formed by processing metal plates, and the manufacturing cost of the connection terminals can be reduced. Further, the battery can be reduced in weight. Furthermore, the overlapping part between the lid member 2 that partitions the inside of the battery and the outside of the battery and the external connection portion 8 of the positive electrode connection terminal 3 or the external connection portion 8 of the negative electrode connection terminal 4 can be eliminated, thereby reducing the manufacturing cost and reducing the battery weight. Can be achieved.

また、外部接続部８は、この一部を貫通するねじ部材６とカシメ構造により接合する。
この構成により、外部接続部８と外部接続金属板４５とをねじ部材６とそれに対応するボルトまたはナットにより密着、固定することができる。外部接続部８は、ねじ部材６と接合する部分において塑性変形していなくても、ねじ部材６の形状に合わせて塑性変形していてもよいが、塑性変形していることが好ましい。外部接続部８がねじ部材６の形状に合わせて塑性変形していることにより、外部接続部８とねじ部材６の接触面積が大きくすることができる。このことにより、電池の密閉性の向上を図ることができ、さらに、ねじ部材６のねじ部３１とそれに対応するボルト又はナットを締め合わせるときにねじ部材６が共回りすることを防止することができる。 Moreover, the external connection part 8 is joined to the screw member 6 that penetrates a part thereof by a caulking structure.
With this configuration, the external connection portion 8 and the external connection metal plate 45 can be adhered and fixed by the screw member 6 and the corresponding bolt or nut. The external connection portion 8 may be plastically deformed in accordance with the shape of the screw member 6 even if it is not plastically deformed at the portion to be joined to the screw member 6, but it is preferable that the external connection portion 8 is plastically deformed. Since the external connection portion 8 is plastically deformed according to the shape of the screw member 6, the contact area between the external connection portion 8 and the screw member 6 can be increased. This can improve the sealing performance of the battery, and can further prevent the screw member 6 from rotating together when the screw portion 31 of the screw member 6 and the corresponding bolt or nut are fastened together. it can.

また、正極接続端子３および負極接続端子４は、それぞれ正極２１と接続する正極接続部１３および負極２２と接続する負極接続部１４を有する。
正極接続部１３および負極接続部１４の形状は特に限定されないが、例えば、短冊状の金属板の短辺をコの字型に曲げた形状とすることができる。このことにより、コの字型の金属板の対向する部分の両側に正極２１または負極２２を接続することができる。また、この場合、正極接続部または負極接続部の長辺の長さは、例えば、５〜１０ｃｍとすることができる。 Further, the positive electrode connecting terminal 3 and the negative electrode connecting terminal 4 have a positive electrode connecting portion 13 connected to the positive electrode 21 and a negative electrode connecting portion 14 connected to the negative electrode 22, respectively.
Although the shape of the positive electrode connection part 13 and the negative electrode connection part 14 is not specifically limited, For example, it can be set as the shape which bent the short side of the strip-shaped metal plate to the U shape. As a result, the positive electrode 21 or the negative electrode 22 can be connected to both sides of the opposing portion of the U-shaped metal plate. In this case, the length of the long side of the positive electrode connecting portion or the negative electrode connecting portion can be set to 5 to 10 cm, for example.

正極接続端子３または負極接続端子４の材料は、電気伝導性を有し、発電要素１２を接続しケース１に収容されても大きく変形しない強度を有すれば特に限定されないが、例えば、正極接続端子３または負極接続端子４は金属板を加工したものであり、好ましくは、正極接続端子３がアルミニウム板を加工したものであり、負極接続端子４が銅板を加工したものである。また、正極接続端子３または負極接続端子４は一枚の金属板についてプレス加工などを行い、複数の金属板を接合することなく形成することもできる。   The material of the positive electrode connection terminal 3 or the negative electrode connection terminal 4 is not particularly limited as long as it has electrical conductivity and has a strength that does not greatly deform even when the power generation element 12 is connected and accommodated in the case 1. The terminal 3 or the negative electrode connection terminal 4 is obtained by processing a metal plate, preferably the positive electrode connection terminal 3 is obtained by processing an aluminum plate, and the negative electrode connection terminal 4 is obtained by processing a copper plate. Further, the positive electrode connection terminal 3 or the negative electrode connection terminal 4 can be formed without pressing a plurality of metal plates by performing press working or the like on one metal plate.

また、外部接続部８は、外側面１７を有するため、外側面１７で外部接続金属板４５と接触させることができる。その結果、発電要素１２と外部配線とを正極接続端子３、負極接続端子４を介して電気的に接続することができる。このことにより発電要素１２が放電および充電をすることができる。   Moreover, since the external connection part 8 has the outer side surface 17, it can be made to contact the external connection metal plate 45 by the outer side surface 17. FIG. As a result, the power generation element 12 and the external wiring can be electrically connected via the positive electrode connection terminal 3 and the negative electrode connection terminal 4. As a result, the power generation element 12 can be discharged and charged.

また、外部接続部８は、一方が膨らんだ円形、例えば、運動場のトラックのような形状、涙形の先端部を丸くしたような形状とすることができる。また、この場合、ねじ部材６は、外部接続部８の円形部の円中心部と接合することができる。また、この場合、外部接続金属板４５は、外部接続部の円形部と実質的に同じ曲率半径を有する部分を有することができ、その部分の円中心部に開口４６を有することができる。このような構成とすることにより、外部接続部８と外部接続金属板４５との接触面積を十分に確保することができる。また、外部接続金属板４５とケース１や蓋部材２との間でリーク電流が流れる確率を小さくすることができる。また、外部接続部８と外部接続金属板４５をより密接に接触させることができる。さらに、外部接続部８と外部接続金属板４５をねじ部材６のねじ部３１と対応するナットまたはボルトで固定する場合、ナット又はボルトの回転と共に外部接続部８が回転することを防止することができる。このことにより、絶縁部材１０の破断、絶縁部材１０と蓋部材２の接合部分の剥離、絶縁部材１０と正極接続端子３または負極接続端子４との剥離を防止することができ、電解液の漏れが生じることを防止することができる。   Moreover, the external connection part 8 can be made into the shape which one side swelled, for example, the shape like the track | truck of a sports field, and the shape which rounded the front-end | tip part of the teardrop shape. In this case, the screw member 6 can be joined to the circular center portion of the circular portion of the external connection portion 8. Further, in this case, the external connection metal plate 45 can have a portion having substantially the same radius of curvature as the circular portion of the external connection portion, and can have an opening 46 at the center of the circle. By setting it as such a structure, the contact area of the external connection part 8 and the external connection metal plate 45 can fully be ensured. In addition, the probability of leakage current flowing between the external connection metal plate 45 and the case 1 or the lid member 2 can be reduced. Moreover, the external connection part 8 and the external connection metal plate 45 can be brought into closer contact. Furthermore, when fixing the external connection part 8 and the external connection metal plate 45 with a nut or bolt corresponding to the screw part 31 of the screw member 6, it is possible to prevent the external connection part 8 from rotating with the rotation of the nut or bolt. it can. This can prevent breakage of the insulating member 10, separation of the joined portion of the insulating member 10 and the lid member 2, and separation of the insulating member 10 from the positive electrode connection terminal 3 or the negative electrode connection terminal 4, and leakage of the electrolyte solution Can be prevented.

また、外部接続部８の外側面１７は、外側面１７に蓋部材２、ケース１より十分に広い板部材を接触させたとき、板部材が蓋部材２、ケース１に接触しない高さに設けられてもよい。この構成により、外部接続金属板４５と蓋部材２またはケース１との間でリーク電流が生じるのを防止することができる。   Further, the outer side surface 17 of the external connection portion 8 is provided at a height at which the plate member does not contact the lid member 2 and the case 1 when the outer side surface 17 is brought into contact with a plate member sufficiently wider than the lid member 2 and the case 1. May be. With this configuration, it is possible to prevent leakage current between the external connection metal plate 45 and the lid member 2 or the case 1.

６．絶縁部材
絶縁部材１０は、蓋部材２と、蓋部材２を貫通した正極接続端子３または負極接続端子４とを接合する。この構成により、蓋部材２と正極接続端子３または負極接続端子４とを絶縁することができ、リーク電流が流れることを防止することができる。また、正極接続端子３または負極接続端子４と蓋部材２との間を塞ぐことができ、電解液の漏れを防止することができる。
絶縁部材１０は、正極接続端子３または負極接続端子４と蓋部材２とを電解液が漏れないように接合し両者を電気的に絶縁することができ、電解液に対して耐性を有し、正極接続端子３または負極接続端子４と蓋部材２とを十分に強く接合させることができるものであれば特に限定されない。例えば、ポリフェニレンスルフィド（ＰＰＳ）樹脂、アラミド樹脂である。 6). Insulating Member The insulating member 10 joins the lid member 2 to the positive electrode connection terminal 3 or the negative electrode connection terminal 4 penetrating the lid member 2. With this configuration, the lid member 2 and the positive electrode connection terminal 3 or the negative electrode connection terminal 4 can be insulated, and leakage current can be prevented from flowing. Further, the gap between the positive electrode connection terminal 3 or the negative electrode connection terminal 4 and the lid member 2 can be closed, and leakage of the electrolyte can be prevented.
The insulating member 10 can join the positive electrode connecting terminal 3 or the negative electrode connecting terminal 4 and the lid member 2 so that the electrolyte does not leak and electrically insulate them, and has resistance to the electrolyte, The positive electrode connection terminal 3 or the negative electrode connection terminal 4 and the lid member 2 are not particularly limited as long as they can be bonded sufficiently strongly. For example, polyphenylene sulfide (PPS) resin and aramid resin.

絶縁部材１０の形成方法は特に限定されないが、例えば、射出成形により形成することができる。また、絶縁部材１０の形成前に正極接続端子３、負極接続端子４、および蓋部材２の絶縁部材１０と接触する部分を、表面処理、たとえば塩基性水溶液での処理することもできる。このことにより、絶縁部材１０との接合をより強くすることができ、電池の密閉性を向上させることができる。また、ねじ部材６のねじ部３１とそれに対応するボルトまたはナットを締め合わせたときに絶縁部材１０に力がかかり絶縁部材１０と蓋部材２、正極接続端子３または負極接続端子４との界面で剥がれが生じ密閉性が失われることを防止することができる。   Although the formation method of the insulating member 10 is not specifically limited, For example, it can form by injection molding. Further, before the insulating member 10 is formed, the positive electrode connecting terminal 3, the negative electrode connecting terminal 4, and the portion of the lid member 2 that contacts the insulating member 10 can be surface-treated, for example, with a basic aqueous solution. Thereby, joining with the insulating member 10 can be strengthened, and the sealing performance of the battery can be improved. Further, when the screw portion 31 of the screw member 6 and the bolt or nut corresponding thereto are tightened, a force is applied to the insulating member 10 at the interface between the insulating member 10 and the lid member 2, the positive electrode connection terminal 3 or the negative electrode connection terminal 4. It is possible to prevent peeling and loss of sealing performance.

７．ねじ部材
ねじ部材６は、外部接続部８を貫通し外部接続部８とカシメ構造により接合する。また、ねじ部材６は、電池外部のナットおよび電池外部のボルトのいずれか一方と締め合うことができるねじ部３１、ならびに外部接続部８と接合するカシメ部３２を有する。
この構成を有することにより、外部接続部８にねじ部３１を有するねじ部材６を固定することができる。また、外部接続金属板４５を外部接続部８に接触させ、このねじ部材６のねじ部３１とこれに対応するボルトまたはナットで締め合わせることにより、外部接続金属板４５と外部接続部８とを密着、固定することができる。 7). Screw member The screw member 6 penetrates the external connection portion 8 and is joined to the external connection portion 8 by a caulking structure. Further, the screw member 6 includes a screw portion 31 that can be fastened with either a nut outside the battery or a bolt outside the battery, and a crimping portion 32 that is joined to the external connection portion 8.
By having this configuration, the screw member 6 having the screw portion 31 can be fixed to the external connection portion 8. Further, the external connection metal plate 45 is brought into contact with the external connection portion 8, and the external connection metal plate 45 and the external connection portion 8 are connected by tightening the screw portion 31 of the screw member 6 with the corresponding bolt or nut. It can be closely attached and fixed.

また、ねじ部材６は、電池外部側の第１面３７および電池内部側の第２面３８を有するフランジ部３３を有してもよい。この構成を有することにより、ねじ部材６が有するカシメ部３２と外部接続部８とをカシメ構造により接合させるときに、フランジ部３３の第１面３７に力を加えることができる。このことにより、カシメ部３２と外部接続部８とを接合しやすくすることができ、また、ねじ部３１の塑性変形を防止することができる。   Further, the screw member 6 may have a flange portion 33 having a first surface 37 on the battery outer side and a second surface 38 on the battery inner side. With this configuration, when the caulking portion 32 of the screw member 6 and the external connection portion 8 are joined by the caulking structure, a force can be applied to the first surface 37 of the flange portion 33. As a result, the crimping portion 32 and the external connection portion 8 can be easily joined, and plastic deformation of the screw portion 31 can be prevented.

ねじ部３１は、雄ネジ構造を有してもよくかつ第１面３７の上に設けられてもよく、カシメ部３２は、第２面３８上に設けられてもよい。
ねじ部３１が雄ネジ構造を有するねじ部材６は、外部接続部８と接合する前において例えば、図３（ａ）の概略斜視図、図３（ｂ）の概略側面図に示したような形状を有しており、図３（ｃ）のような断面を有してもよい。また、ねじ部材６は、フランジ部３３を有さない図３（ｅ）のような断面を有してもよい。
このような構成を有することにより、雄ネジ構造のねじ部３１は、電池外部のナットと締め合うことができる。また、カシメ部３２は、ボルトの頭またはフランジ部３３と生リベット状態のカシメ部３２とをかしめることにより、塑性変形し外部接続部８と接合することができる。 The screw portion 31 may have a male screw structure and may be provided on the first surface 37, and the crimping portion 32 may be provided on the second surface 38.
The screw member 6 in which the screw portion 31 has a male screw structure is shaped, for example, as shown in the schematic perspective view of FIG. 3 (a) and the schematic side view of FIG. 3 (b) before joining to the external connection portion 8. It may have a cross section as shown in FIG. Further, the screw member 6 may have a cross section as shown in FIG.
By having such a configuration, the threaded portion 31 of the external thread structure can be fastened with a nut outside the battery. Further, the caulking portion 32 can be plastically deformed and joined to the external connection portion 8 by caulking the bolt head or the flange portion 33 and the caulking portion 32 in a raw rivet state.

ねじ部３１は、ねじ部材６に設けられた雌ネジ構造を有する部分であってもよく、フランジ部３３は、ねじ部材６の一方の端に設けられ、カシメ部３２は、ねじ部材６の他方の端に設けられてもよい。
ねじ部３１が雌ネジ構造を有するねじ部材６は、外部接続部８と接合する前において例えば、図４（ａ）の概略斜視図、図４（ｂ）の概略側面図に示したような形状を有しており、図４（ｃ）または図４（ｄ）のような断面を有してもよい。また、ねじ部材６は、フランジ部３３を有さない図４（ｆ）のような断面を有してもよい。なお、ねじ部材が図４（ｃ）、図４（ｆ）のような断面を有する場合、電池内部の電解液の漏れを防止するために、カシメ部３２を樹脂部材１５などで覆い、電解液の漏れを防止することが好ましい。 The screw portion 31 may be a portion having a female screw structure provided in the screw member 6, the flange portion 33 is provided at one end of the screw member 6, and the crimping portion 32 is the other end of the screw member 6. It may be provided at the end.
The screw member 6 in which the screw portion 31 has a female screw structure is shaped, for example, as shown in the schematic perspective view of FIG. 4A and the schematic side view of FIG. And may have a cross section as shown in FIG. 4 (c) or FIG. 4 (d). Further, the screw member 6 may have a cross section as shown in FIG. When the screw member has a cross section as shown in FIGS. 4C and 4F, the caulking portion 32 is covered with the resin member 15 or the like in order to prevent leakage of the electrolyte inside the battery. It is preferable to prevent leakage.

図６（ａ）（ｂ）は、生リベット状態のカシメ部３２、雄ネジ構造のねじ部３１およびフランジ部３３を有するねじ部材６と外部接続部８とをカシメ構造により接合させる工程を示した説明図である。まず、例えば、図６（ａ）のようにこのねじ部材６のカシメ部３２を外部接続部８の貫通孔に嵌合させ、そのカシメ部３２の下に金型４０を配置する。次に図６（ｂ）のようにフランジ部３３に押圧用部材４１を押し付けて金型４０と押圧用部材４１とで、ねじ部材６のカシメ部３２を塑性変形させ、かしめる。このとき、外部接続部８を同時にねじ部材６に密着するように塑性変形させることができる。また、フランジ部３３の第１面３７が外部接続部８の外側面１７と同一面上または外側面１７より電池内部側にくるまで金型４０と押圧部材４１との間に力を加えることができる。
なお、ねじ部材６と接合前の外部接続部８が有する貫通孔は、カシメ部３２の外周の半径と実質的に同じ半径を有してもよい。
なお、図６では、雄ネジ構造のねじ部３１を有するねじ部材６について説明したが、雌ネジ構造のねじ部３１を有するねじ部材６についても同様にねじ部材６と外部接続部８をカシメ構造により接合させることができる。 6 (a) and 6 (b) show the process of joining the screw member 6 having the caulking portion 32 in the raw rivet state, the screw portion 31 of the male screw structure and the flange portion 33, and the external connection portion 8 by the caulking structure. It is explanatory drawing. First, for example, as shown in FIG. 6A, the caulking portion 32 of the screw member 6 is fitted into the through hole of the external connection portion 8, and the mold 40 is disposed under the caulking portion 32. Next, as shown in FIG. 6B, the pressing member 41 is pressed against the flange portion 33, and the caulking portion 32 of the screw member 6 is plastically deformed and crimped by the mold 40 and the pressing member 41. At this time, the external connection portion 8 can be plastically deformed so as to be in close contact with the screw member 6 at the same time. Further, a force may be applied between the mold 40 and the pressing member 41 until the first surface 37 of the flange portion 33 is on the same surface as the outer surface 17 of the external connection portion 8 or on the inner side of the battery from the outer surface 17. it can.
In addition, the through-hole which the external connection part 8 before joining with the screw member 6 may have a radius substantially the same as the radius of the outer periphery of the crimping part 32. FIG.
In FIG. 6, the screw member 6 having the male threaded structure 31 has been described. However, the screw member 6 and the external connection section 8 are similarly crimped in the threaded member 6 having the female threaded structure 31. Can be joined.

また、図６では、フランジ部３３を有するねじ部材６について説明したが、フランジ部３３を有さないねじ部材６についても同様に外部接続部８とカシメ構造により接合させることができる。ただし、この場合、カシメ部３２をかしめるために、雄ネジ構造を有するねじ部３１の頭または雌ネジ構造を有するねじ部３１の一方の端に力を加える必要があるため、雄ネジ構造や雌ネジ構造がくずれない力でかしめる必要がある。例えば、カシメ部３２をより塑性変形しやすくすることなどで雄ネジ構造や雌ネジ構造の塑性変形を防止することができる。   Moreover, although the screw member 6 having the flange portion 33 has been described with reference to FIG. 6, the screw member 6 not having the flange portion 33 can be similarly joined to the external connection portion 8 by a caulking structure. However, in this case, in order to caulk the caulking portion 32, it is necessary to apply a force to the head of the screw portion 31 having the male screw structure or one end of the screw portion 31 having the female screw structure. It is necessary to crimp the internal thread structure with a force that does not break. For example, the plastic deformation of the male screw structure or the female screw structure can be prevented by making the caulking portion 32 easier to plastically deform.

生リベット状態のカシメ部３２の形状は、このカシメ部３２をかしめることにより外部接続部８と接合することができれば、特に限定されないが、例えば、円筒形とすることができる。円筒形とすることにより、カシメ部３２を比較的塑性変形しやすくすることができる。また、塑性変形後に外周部全体で外部接続部８と密着させることができ、電解液の漏れを防止することができる。
また、外部接続部８と接合後のカシメ部３２の形状は、例えば、ラッパの口状に拡開した形状を有してもよい。また、このとき、外部接続部８は、ラッパの口状に拡開した部分の外周部に密着するような形状を有してもよい。 The shape of the caulking portion 32 in the raw rivet state is not particularly limited as long as it can be joined to the external connection portion 8 by caulking the caulking portion 32, but may be, for example, a cylindrical shape. By using a cylindrical shape, the caulking portion 32 can be relatively easily plastically deformed. Further, the entire outer peripheral portion can be brought into close contact with the outer peripheral portion after plastic deformation, and leakage of the electrolytic solution can be prevented.
Moreover, the shape of the crimping | crimped part 32 after joining with the external connection part 8 may have the shape expanded, for example to the mouth shape of a trumpet. Moreover, the external connection part 8 may have a shape which closely_contact | adheres to the outer peripheral part of the part expanded in the mouth shape of the trumpet at this time.

ねじ部材６の材料は、ねじ部３１およびカシメ部３２を有することができれば特に限定されないが、例えば、金属であり、さらにはスチールである。また、ねじ部材６に金属製のものを用いることにより、ねじ部３１、ねじ部３１に対応するボルトまたはナット、正極接続端子３または負極接続端子４、外部接続金属板４５をすべて金属性のものとすることができる。このことにより、電池の温度が上昇した場合でも、ボルトとナットが緩むのを防止することができ、正極接続端子３または負極接続端子４と外部接続金属板４５と間の接触抵抗が大きくなることを防止することができる。   Although the material of the screw member 6 will not be specifically limited if it can have the thread part 31 and the crimp part 32, For example, they are a metal and also steel. Further, by using a metal member for the screw member 6, the screw portion 31, the bolt or nut corresponding to the screw portion 31, the positive electrode connection terminal 3 or the negative electrode connection terminal 4, and the external connection metal plate 45 are all metallic. It can be. As a result, even when the temperature of the battery rises, the bolts and nuts can be prevented from loosening, and the contact resistance between the positive connection terminal 3 or the negative connection terminal 4 and the external connection metal plate 45 increases. Can be prevented.

ねじ部材６は、第２面３８上に凸部３５を有してよく、外部接続部８は、フランジ部３３の外周部分と接触するように塑性変形した形状を有してもよい。また、ねじ部材６は、フランジ部３３の外周部分に凸部を有してもよい。また、凸部は複数であってもよい。
例えば、図３（ｂ）、（ｄ）のように凸部３５を有してもよく、また図４（ｂ）、（ｅ）のように凸部３５を有してもよい。また、図示していないが、フランジ部３３の外周部分に複数の凸部を有してもよい。
この構成により、外部接続部８は、凸部が形成された部分および凸部が形成されていない部分の両方に沿って塑性変形するため、ねじ部材６と外部接続部８の接触界面を凸凹にすることができる。つまり、ねじ部材６と外部接続部８はこの部分において咬着することができる。このことにより、ねじ部３１がその対応するボルト又はナットと締め合うときにねじ部材６が回転することを防止することができる。また、このボルトおよびナットに十分な締め付けトルクを与えることができ、外部接続部８と外部接続金属板４５とを十分に密着することができる。 The screw member 6 may have a convex portion 35 on the second surface 38, and the external connection portion 8 may have a shape plastically deformed so as to contact the outer peripheral portion of the flange portion 33. The screw member 6 may have a convex portion on the outer peripheral portion of the flange portion 33. Moreover, the convex part may be plural.
For example, the protrusions 35 may be provided as shown in FIGS. 3B and 3D, and the protrusions 35 may be provided as shown in FIGS. 4B and 4E. Moreover, although not shown in figure, you may have a some convex part in the outer peripheral part of the flange part 33. FIG.
With this configuration, the external connection portion 8 is plastically deformed along both the portion where the convex portion is formed and the portion where the convex portion is not formed. Therefore, the contact interface between the screw member 6 and the external connection portion 8 is uneven. can do. That is, the screw member 6 and the external connection portion 8 can be bitten at this portion. Thus, the screw member 6 can be prevented from rotating when the screw portion 31 is tightened with the corresponding bolt or nut. In addition, a sufficient tightening torque can be applied to the bolt and nut, and the external connection portion 8 and the external connection metal plate 45 can be sufficiently adhered to each other.

フランジ部３３の第１面３７は、外部接続部８の外側面１７と同一面上または外部接続部８の外側面１７よりも電池内部側にあってもよい。つまりフランジ部３３を外部接続部８に埋設してもよい。
この構成により、外部接続部８の外側面１７に雄ネジ構造を有するねじ部３１以外の凸部をなくすことができる。このことにより、外部接続金属板４５が有する開口４６にボルトを通し、外部接続金属板４５と外部接続部８をねじ部３１とそれに対応するボルトまたはナットとで固定するときに、外部接続金属板４５と外部接続部８との接触面積を広くすることができ、また、この固定に必要とする部品数を低減することができる。 The first surface 37 of the flange portion 33 may be on the same surface as the outer surface 17 of the external connection portion 8 or on the inner side of the battery than the outer surface 17 of the external connection portion 8. That is, the flange portion 33 may be embedded in the external connection portion 8.
With this configuration, it is possible to eliminate a convex portion other than the screw portion 31 having a male screw structure on the outer surface 17 of the external connection portion 8. Thus, when the bolt is passed through the opening 46 of the external connection metal plate 45 and the external connection metal plate 45 and the external connection portion 8 are fixed by the screw portion 31 and the corresponding bolt or nut, the external connection metal plate The contact area between 45 and the external connection portion 8 can be widened, and the number of components required for this fixing can be reduced.

８．樹脂部材
樹脂部材１５は、外部接続部８とカシメ部３２との境界部分を覆うように設けられてもよい。
この構成により、カシメ部３２と外部接続部８との間のわずかな隙間から電解液が漏れるのを防止することができる。
樹脂部材１５は、カシメ部３２と外部接続部８との間のわずかな隙間から電解液が漏れないように設けられ、電解液に対して耐性を有すれば特に限定されない。例えば、ポリフェニレンスルフィド（ＰＰＳ）樹脂、アラミド樹脂である。
樹脂部材１５の形成方法は特に限定されないが、例えば、アンカー効果を用いて固定してもよく、射出成形により形成してもよい。また、樹脂部材１５の形成前に外部接続部８およびカシメ部３２の樹脂部材１５と接触する部分を、表面処理、例えば塩基性水溶液による処理をすることもできる。このことにより、樹脂部材１５との接合をより強くすることができる。 8). Resin Member The resin member 15 may be provided so as to cover a boundary portion between the external connection portion 8 and the caulking portion 32.
With this configuration, it is possible to prevent the electrolytic solution from leaking from a slight gap between the crimping portion 32 and the external connection portion 8.
The resin member 15 is not particularly limited as long as the electrolytic solution does not leak from a slight gap between the caulking portion 32 and the external connection portion 8 and has resistance to the electrolytic solution. For example, polyphenylene sulfide (PPS) resin and aramid resin.
Although the formation method of the resin member 15 is not specifically limited, For example, you may fix using an anchor effect and may form by injection molding. Further, before the resin member 15 is formed, portions of the external connection portion 8 and the caulking portion 32 that are in contact with the resin member 15 can be subjected to surface treatment, for example, treatment with a basic aqueous solution. As a result, the bonding with the resin member 15 can be made stronger.

９．外部接続金属板
外部接続金属板４５は、外部接続部８に電気的に接続する外部配線でありかつ開口４６を有する。また、外部接続金属板４５は、開口４６にボルトを通しねじ部３１とそれに対応するナットまたはボルトとを締め合わせるにより外部接続部８と接触するように固定される。
例えば、外部接続金属板４５は、図５（ａ）のような形状を有することができる。また、例えば、図５（ｂ）のように、開口４６をねじ部材６の雄ネジ構造のねじ部３１に通し、ナット４８とねじ部３１を締め合わせることにより、外部接続部８と外部接続金属板４５を圧着させることができる。
この構成により、正極接続端子３または負極接続端子４と外部配線を容易かつ密接に接触させることができる。また、ボルトおよびナットで接触させることができるため、簡単に取り外しもできる。また、正極接続端子３、負極接続端子４および外部接続金属板４５に異なる種類の金属を用いた場合でも確実に接触させることができる。たとえば、溶接で異なる種類の金属からなる正極接続端子３または負極接続端子４と外部配線を接合させた場合、その金属の種類により溶接しにくい、溶接できない、溶接面が剥がれてしまうなどの問題が生じる場合がある。また、一般的に電池の接続端子に用いられる銅やアルミニウムに対する溶接は困難で信頼性が低い。ボルトおよびナットで接触させることによりこのような問題を回避することができる。 9. External Connection Metal Plate The external connection metal plate 45 is an external wiring that is electrically connected to the external connection portion 8 and has an opening 46. The external connection metal plate 45 is fixed so as to contact the external connection portion 8 by passing a bolt through the opening 46 and tightening the screw portion 31 and the corresponding nut or bolt.
For example, the external connection metal plate 45 can have a shape as shown in FIG. Further, for example, as shown in FIG. 5B, the external connection portion 8 and the external connection metal can be obtained by passing the opening 46 through the screw portion 31 of the male screw structure of the screw member 6 and fastening the nut 48 and the screw portion 31 together. The plate 45 can be crimped.
With this configuration, the positive electrode connection terminal 3 or the negative electrode connection terminal 4 and the external wiring can be easily and closely contacted. Moreover, since it can contact with a volt | bolt and a nut, it can also remove easily. Further, even when different types of metals are used for the positive electrode connection terminal 3, the negative electrode connection terminal 4, and the external connection metal plate 45, they can be reliably brought into contact with each other. For example, when the positive electrode connection terminal 3 or the negative electrode connection terminal 4 made of different types of metal is joined to the external wiring by welding, there are problems such as difficulty in welding, welding, and peeling of the weld surface depending on the type of the metal. May occur. Further, welding to copper or aluminum generally used for battery connection terminals is difficult and has low reliability. Such a problem can be avoided by contacting with bolts and nuts.

外部接続金属板４５の材料は、特に限定されないが例えば、アルミニウム、銅、スチールなどである。   The material of the external connection metal plate 45 is not particularly limited, and examples thereof include aluminum, copper, and steel.

また、外部接続金属板４５は、無光沢ニッケルメッキ層を表面に有してもよい。
このことにより、外部接続金属板４５と外部接続部８との接触抵抗が大きくなることを防止することができる。
一般的に電池では、接続端子にアルミニウムや銅など様々な金属が用いられる。このため、外部配線と接続する部分で異なる種類の金属の界面が存在することが多い。この異なる種類の金属の界面では、その２つの金属の特性によりその接触抵抗が大きくなる場合がある。この外部配線と接続端子との界面で生じる接触抵抗を低減させる対策として、外部配線に対して金メッキ、銀メッキまたはニッケルメッキを行うことが一般的である。しかし、金メッキは高価であるため製造コストの増加につながる。銀メッキは高価であり酸化劣化が大きいため、製造コストの増加につながりまた安定性が低い。ニッケルメッキは、安価で安定性が高いという特性を有する。さらに無光沢ニッケルメッキは、光沢ニッケルメッキと比べより小さい接触抵抗とすることができる。
そこで外部接続金属板４５に無光沢ニッケルメッキ層を形成することにより、接続端子に銅やアルミニウムを用いたとき、その接触抵抗の増加を抑えることができた。 Further, the external connection metal plate 45 may have a matte nickel plating layer on the surface.
As a result, it is possible to prevent the contact resistance between the external connection metal plate 45 and the external connection portion 8 from increasing.
In general, in a battery, various metals such as aluminum and copper are used for connection terminals. For this reason, there are many cases where different types of metal interfaces exist in the portion connected to the external wiring. At the interface between the different types of metals, the contact resistance may increase due to the characteristics of the two metals. As a measure for reducing the contact resistance generated at the interface between the external wiring and the connection terminal, it is common to perform gold plating, silver plating or nickel plating on the external wiring. However, since gold plating is expensive, it leads to an increase in manufacturing cost. Silver plating is expensive and oxidatively deteriorates, leading to an increase in manufacturing cost and low stability. Nickel plating has the characteristics of being inexpensive and highly stable. Furthermore, the matte nickel plating can have a smaller contact resistance than the bright nickel plating.
Therefore, by forming a matte nickel plating layer on the external connection metal plate 45, it was possible to suppress an increase in contact resistance when copper or aluminum was used for the connection terminals.

１： ケース ２：蓋部材 ３：正極接続端子 ４：負極接続端子 ６：ねじ部材 ８：外部接続部 １０：絶縁部材 １２：発電要素 １３：正極接続部 １４：負極接続部 １５：樹脂部材 １７：外側面 １８：内側面 ２０：密閉型電池 ２１：正極 ２２：負極 ２４：セパレータ ２５：正極活物質層 ２６：負極活物質層 ２７：正極集電体 ２８：負極集電体 ３１：ねじ部 ３２：カシメ部 ３３：フランジ部 ３５：凸部 ３７：第１面 ３８：第２面 ４０：金型 ４１：押圧用部材 ４５：外部接続金属板 ４６：開口 ４８：ナット     1: Case 2: Lid member 3: Positive electrode connection terminal 4: Negative electrode connection terminal 6: Screw member 8: External connection part 10: Insulating member 12: Power generation element 13: Positive electrode connection part 14: Negative electrode connection part 15: Resin member 17: Outside surface 18: Inside surface 20: Sealed battery 21: Positive electrode 22: Negative electrode 24: Separator 25: Positive electrode active material layer 26: Negative electrode active material layer 27: Positive electrode current collector 28: Negative electrode current collector 31: Screw part 32: Caulking portion 33: Flange portion 35: Convex portion 37: First surface 38: Second surface 40: Mold 41: Pressing member 45: External connection metal plate 46: Opening 48: Nut

Claims (9)

蓋部材を接合したケースの内部に、絶縁部材を介して前記蓋部材とそれぞれ接合した正極接続端子および負極接続端子と、セパレータと、前記セパレータを介して配置された正極および負極と、電解液とを備え、
前記正極および負極は、それぞれ前記正極接続端子および負極接続端子に接続され、
前記正極接続端子および負極接続端子は、それぞれ前記蓋部材を貫通し、かつ、前記蓋部材と接合した前記ケースの外部と内部とを仕切る板状の外部接続部をそれぞれ有し、
前記外部接続部は、この一部を貫通するねじ部材と接合し、
前記ねじ部材は、ナットおよびボルトのいずれか一方と締め合うことができるねじ部、ならびに前記外部接続部とカシメ構造により接合するカシメ部を有することを特徴とする密閉型電池。 In the case where the lid member is joined, a positive electrode connecting terminal and a negative electrode connecting terminal joined to the lid member via an insulating member, a separator, a positive electrode and a negative electrode arranged via the separator, an electrolyte solution, With
The positive electrode and the negative electrode are connected to the positive electrode connection terminal and the negative electrode connection terminal, respectively.
The positive electrode connection terminal and the negative electrode connection terminal each have a plate-like external connection portion that penetrates the lid member and partitions the outside and the inside of the case joined to the lid member,
The external connection part is joined to a screw member that penetrates a part of the external connection part,
The sealed battery according to claim 1, wherein the screw member includes a screw part that can be fastened to any one of a nut and a bolt, and a caulking part that is joined to the external connection part by a caulking structure. 前記ねじ部材は、前記外部に面した第１面および前記内部に面した第２面を有するフランジ部をさらに有する請求項１に記載の電池。   The battery according to claim 1, wherein the screw member further includes a flange portion having a first surface facing the outside and a second surface facing the inside. 前記ねじ部は、雄ネジ構造を有しかつ第１面の上に設けられ、
前記カシメ部は、第２面上に設けられた請求項２に記載の電池。 The screw portion has a male screw structure and is provided on the first surface;
The battery according to claim 2, wherein the crimping portion is provided on the second surface. 前記ねじ部は、前記ねじ部材に設けられた雌ネジ構造を有する部分であり、
前記フランジ部は、前記ねじ部材の一方の端に設けられ、
前記カシメ部は、前記ねじ部材の他方の端に設けられた請求項２に記載の電池。 The screw portion is a portion having a female screw structure provided in the screw member,
The flange portion is provided at one end of the screw member,
The battery according to claim 2, wherein the crimping portion is provided at the other end of the screw member. 前記ねじ部材は、第２面上に凸部を有し、
前記外部接続部は、前記フランジ部の外周部分と接触するように塑性変形した形状を有する請求項２〜４のいずれか１つに記載の電池。 The screw member has a convex portion on the second surface,
The battery according to claim 2, wherein the external connection portion has a shape plastically deformed so as to come into contact with an outer peripheral portion of the flange portion. 第１面は、前記外部接続部の前記外部に面した外側面と同一面上の面または前記外側面よりも前記内部に近い面である請求項２〜５のいずれか１つに記載の電池。   The battery according to any one of claims 2 to 5, wherein the first surface is a surface on the same surface as the outer surface facing the outside of the external connection portion or a surface closer to the inside than the outer surface. . 前記外部接続部と前記カシメ部との境界部分を覆う樹脂部材をさらに有する請求項１〜６のいずれか１つに記載の電池。   The battery according to claim 1, further comprising a resin member that covers a boundary portion between the external connection portion and the caulking portion. 前記外部接続部に電気的に接続する外部配線でありかつ開口を有する外部接続金属板をさらに有し、
前記外部接続金属板は、前記開口にボルトを通し前記ねじ部とそれに対応するナットまたはボルトとを締め合わせるにより前記外部接続部と接触するように固定され、
前記外部接続金属板は、無光沢ニッケルメッキ層を表面に有する請求項１〜７のいずれか１つに記載の電池。 An external connection metal plate electrically connected to the external connection portion and having an opening;
The external connection metal plate is fixed so as to contact the external connection portion by passing a bolt through the opening and tightening the screw portion and a corresponding nut or bolt.
The battery according to claim 1, wherein the external connection metal plate has a matte nickel plating layer on the surface. 前記正極は、リチウムを含む正極活物質層を有し、
前記負極は、グラファイトを含む負極活物質層を有し、
前記電解液は、リチウム塩溶質を有機溶媒に溶解した溶液である請求項１〜８のいずれか１つに記載の電池。 The positive electrode has a positive electrode active material layer containing lithium,
The negative electrode has a negative electrode active material layer containing graphite,
The battery according to claim 1, wherein the electrolytic solution is a solution in which a lithium salt solute is dissolved in an organic solvent.
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US8940431B2 (en) 2010-12-10 2015-01-27 Gs Yuasa International Ltd. Battery and current collector
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