JP2009231145A - Secondary battery - Google Patents

Secondary battery Download PDF

Info

Publication number
JP2009231145A
JP2009231145A JP2008076816A JP2008076816A JP2009231145A JP 2009231145 A JP2009231145 A JP 2009231145A JP 2008076816 A JP2008076816 A JP 2008076816A JP 2008076816 A JP2008076816 A JP 2008076816A JP 2009231145 A JP2009231145 A JP 2009231145A
Authority
JP
Japan
Prior art keywords
bus bar
electrode terminal
positive electrode
secondary battery
conductor
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.)
Pending
Application number
JP2008076816A
Other languages
Japanese (ja)
Inventor
Kaoru Koiwa
馨 小岩
Masayuki Hoshino
昌幸 星野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP2008076816A priority Critical patent/JP2009231145A/en
Publication of JP2009231145A publication Critical patent/JP2009231145A/en
Pending legal-status Critical Current

Links

Images

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

  • Connection Of Batteries Or Terminals (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a secondary battery with a terminal structure can supply high current. <P>SOLUTION: The secondary battery includes a case housing an electrode body and electrolyte solution inside, a lid closing the case, an electrode terminal protruding from the lid, and a conductor having a joint groove with the electrode terminal fitted and to be welded at the electrode terminal fitted in the joint groove. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、筐体に収容された電極体から正極端子および負極端子を取り出す二次電池に関する。   The present invention relates to a secondary battery for taking out a positive electrode terminal and a negative electrode terminal from an electrode body housed in a casing.

近年、携帯電話やノートパソコンなどの持ち運び可能な携帯機器から、環境問題への関心の高まりとともに、電気自動車、ハイブリッド電気自動車に対して二次電池の需要が高まっている。   2. Description of the Related Art In recent years, the demand for secondary batteries for electric vehicles and hybrid electric vehicles has increased along with the growing interest in environmental issues from portable devices such as mobile phones and laptop computers.

このような二次電池を利用する機器にあっては、高出力供給、すなわち大電流での放電を行える能力が要求されている。   A device using such a secondary battery is required to have a capability of supplying a high output, that is, discharging with a large current.

従来、電源として用いられている二次電池としては、シート状の正極板および負極板を、セパレータを介して捲回して形成された捲回型電極体が用いられている。そして、このような捲回型電極体を有する電池は外ケースを備え、この外ケース内に電解液とともに捲回型電極体が蓋によって封入されている。捲回型電極体からの電力の取り出しは、正極板および負極板に接続された電極端子を通して行われている。また、大電流を得るために、複数の二次電池の正極端子を直列接続することも必要である。   Conventionally, as a secondary battery used as a power source, a wound electrode body formed by winding a sheet-like positive electrode plate and a negative electrode plate through a separator is used. A battery having such a wound electrode body includes an outer case, and the wound electrode body is enclosed with a lid in the outer case together with the electrolyte. Electric power is taken out from the wound electrode body through electrode terminals connected to the positive electrode plate and the negative electrode plate. In order to obtain a large current, it is also necessary to connect the positive terminals of a plurality of secondary batteries in series.

特許文献１には、正極、負極および電解質を包装体に収納するとともに、正極端子および負極端子が導出されたバッテリーセルと、バッテリーセルを収納するバッテーリー缶と、正極端子および負極端子がそれぞれ接続された正極端子部と負極端子部とを有する二次電池において、正極端子部と負極端子部は、外部機器の導体と接続する場合、接触させることで電気的接続される構成が開示されている。   In Patent Document 1, a positive electrode, a negative electrode, and an electrolyte are accommodated in a package, and a battery cell from which the positive electrode terminal and the negative electrode terminal are derived, a battery can that accommodates the battery cell, and a positive electrode terminal and a negative electrode terminal are connected, respectively. In the secondary battery having the positive electrode terminal portion and the negative electrode terminal portion, a configuration is disclosed in which the positive electrode terminal portion and the negative electrode terminal portion are electrically connected by being brought into contact with each other when connected to a conductor of an external device.

特許文献２には、正極および負極を有する素電池と、正極または負極のいずれかと一方のリード線で電気的に接続し、保護回路基板と他方のリード線で接続する加熱保護素子とを有する電池装置において、端子と加熱保護素子との接続方法は、抵抗溶接、レーザ溶接はんだ付けなどの点溶接が用いられる構成が開示されている。
特開２００７−４８７２０号公報 特開２００４−７１３４６号公報 Patent Document 2 discloses a battery having a unit cell having a positive electrode and a negative electrode, and a heating protection element that is electrically connected to either the positive electrode or the negative electrode with one lead wire and connected to the protective circuit board with the other lead wire. In the apparatus, a configuration in which spot welding such as resistance welding or laser welding soldering is used as a connection method between the terminal and the heat protection element is disclosed.
JP 2007-48720 A JP 2004-71346 A

特許文献１に開示されている二次電池における端子と導体の接触による接続は、接触抵抗が大きくなるため大電流を流すことができない。また、特許文献２に開示されている電池装置における端子と導体の点溶接による接続は、導体の厚さを厚くできないため大電流を流すことができない問題点がある。   The connection by contact between the terminal and the conductor in the secondary battery disclosed in Patent Document 1 cannot cause a large current to flow because the contact resistance increases. Moreover, the connection by the point welding of the terminal and conductor in the battery apparatus currently disclosed by patent document 2 has the problem that a large current cannot be sent since the thickness of a conductor cannot be increased.

この発明は以上の点に鑑みなされたものであり、大電流を供給することができる端子構造を有した二次電池を提供することにある。   This invention is made | formed in view of the above point, and is providing the secondary battery which has the terminal structure which can supply a heavy current.

本発明の実施形態に係る二次電池は、電極体および電解液を内部に収納したケースと、前記ケースを閉塞する蓋体と、前記蓋体から突出した電極端子と、前記電極端子が嵌め込まれた接合溝を有し、前記接合溝に嵌め込まれた前記電極端子に溶接された導体とを有する。   A secondary battery according to an embodiment of the present invention includes a case in which an electrode body and an electrolytic solution are housed, a lid body that closes the case, an electrode terminal that protrudes from the lid body, and the electrode terminal that is fitted therein. A conductor welded to the electrode terminal fitted in the joint groove.

本発明の態様によれば、導体厚の厚いブスバーに二次電池の端子を嵌め込む溝を設けているので、ブスバーと端子を溶接する箇所ではブスバーの厚さが薄くなるので、強固な溶接が可能である。また、ブスバーの導体厚は全体として厚いので大きな電流を流すことができる。   According to the aspect of the present invention, since the groove for fitting the terminal of the secondary battery is provided in the bus bar having a large conductor thickness, the thickness of the bus bar is reduced at the portion where the bus bar and the terminal are welded. Is possible. Moreover, since the bus bar has a large conductor thickness as a whole, a large current can flow.

以下図面を参照しながら、この発明の実施形態に係る捲回型電極電池１について詳細に説明する。図１は、捲回型電極電池１の一部を切り欠いて示す斜視図である。図１に示すように、偏平な矩形箱状のケースであるセル１０と、ケース内に電解液１２とともに収納された偏平状の捲回型電極体１４とを備えている。電極体１４は、正極板２４と負極板２５を有している。また、セル１０を密封する蓋体であるキャップ体１０ａが設けられている。正極板２４は正極接続部材１６と、負極板２５は負極接続部材１８と接続されている。   Hereinafter, a wound electrode battery 1 according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view in which a part of a wound electrode battery 1 is cut away. As shown in FIG. 1, a cell 10 which is a flat rectangular box-shaped case and a flat wound electrode body 14 housed in the case together with an electrolyte 12 are provided. The electrode body 14 includes a positive electrode plate 24 and a negative electrode plate 25. Further, a cap body 10a that is a lid body for sealing the cell 10 is provided. The positive electrode plate 24 is connected to the positive electrode connection member 16, and the negative electrode plate 25 is connected to the negative electrode connection member 18.

キャップ体１０ａには、正極端子２０と、負極端子２２が設けられている。正極接続部材１６は、セル１０と接続されているため、キャップ体１０ａに設けられた正極端子２０はセル１０と同電位を有する。また、負極端子２２は、キャップ体１０ａに設けられた絶縁体、例えば、ガスケット２３を介してキャップ体１０ａに取り付けられている。そして、負極端子２２は、ガスケット２３に対して気密性を保った状態で貫通し、負極接続部材１８と接続されている。そのため、負極端子２２は、セル１０およびキャップ体１０ａとは絶縁されているため、正極端子２０およびセル１０およびキャップ体１０ａとは異なる電位を有する。   The cap body 10 a is provided with a positive electrode terminal 20 and a negative electrode terminal 22. Since the positive electrode connection member 16 is connected to the cell 10, the positive electrode terminal 20 provided on the cap body 10 a has the same potential as the cell 10. The negative electrode terminal 22 is attached to the cap body 10a via an insulator provided on the cap body 10a, for example, a gasket 23. The negative electrode terminal 22 penetrates the gasket 23 while maintaining airtightness, and is connected to the negative electrode connection member 18. Therefore, since the negative electrode terminal 22 is insulated from the cell 10 and the cap body 10a, it has a potential different from that of the positive electrode terminal 20, the cell 10 and the cap body 10a.

図２は、本発明の実施形態に係る正極端子２０を拡大した斜視図である。正極端子２０は、キャップ体１０ａに対して溶接することで接続している。正極端子２０の形状はほぼ箱型である。正極端子２０は、キャップ体１０ａとの接続端において、正極端子２０を中心としたキャップ体１０ａの長手方向に対する両端に溶接部２０ａ、２０ｂを一体として有している。溶接部２０ａ、２０ｂとキャップ体１０ａとの溶接は、例えばレーザ溶接によってなされ、正極端子２０はキャップ体１０ａに対して固定される。本実施形態では、溶接部２０ａ、２０ｂは、正極端子２０を中心としたキャップ体１０ａの長手方向に対する両端に設けられている。したがって、正極端子２０のキャップ体１０ａと平行に設けられた辺は、最大でキャップ体１０ａの幅方向の長さまで長くできる。   FIG. 2 is an enlarged perspective view of the positive electrode terminal 20 according to the embodiment of the present invention. The positive electrode terminal 20 is connected to the cap body 10a by welding. The shape of the positive electrode terminal 20 is substantially box-shaped. The positive electrode terminal 20 integrally has welds 20a and 20b at both ends with respect to the longitudinal direction of the cap body 10a around the positive electrode terminal 20 at the connection end with the cap body 10a. The welding parts 20a, 20b and the cap body 10a are welded, for example, by laser welding, and the positive terminal 20 is fixed to the cap body 10a. In the present embodiment, the welded portions 20a and 20b are provided at both ends with respect to the longitudinal direction of the cap body 10a with the positive electrode terminal 20 as the center. Therefore, the side provided in parallel with the cap body 10a of the positive electrode terminal 20 can be increased up to the length in the width direction of the cap body 10a.

次に、正極端子２０とブスバー３０を接合する場合について説明する。図３は、正極端子２０とブスバー３０を接合した場合の斜視図である。図４は、正極端子２０とブスバー３０を接合した場合の断面図である。図５は、ブスバーの形状を示す図である。図５（ａ）は、蓋体１０ａと対向しないブスバー３０の面の表面図である。図５（ｂ）は、図３におけるブスバー３０のＸ−Ｘ断面図である。図５（ｃ）は、蓋体１０ａと対向するブスバー３０の面の表面図である。図５（ａ），（ｂ），（ｃ）には、ブスバー３０と正極端子２０とを溶接した場合の溶接線３２を示している。本実施例では、ブスバー３０の長手方向に沿って溶接しているため、長手方向に沿った溶接線３２となっている。本実施例ではブスバー３０が正極端子３０と溶接される場合について説明するが、ブスバー３０が負極端子２２と溶接される場合であってもブスバー３０の構造は同様である。   Next, the case where the positive electrode terminal 20 and the bus bar 30 are joined will be described. FIG. 3 is a perspective view when the positive electrode terminal 20 and the bus bar 30 are joined. FIG. 4 is a cross-sectional view when the positive electrode terminal 20 and the bus bar 30 are joined. FIG. 5 is a diagram illustrating the shape of the bus bar. Fig.5 (a) is a surface view of the surface of the bus bar 30 which does not oppose the cover body 10a. FIG.5 (b) is XX sectional drawing of the bus bar 30 in FIG. FIG. 5C is a surface view of the surface of the bus bar 30 facing the lid body 10a. 5A, 5B, and 5C show a weld line 32 when the bus bar 30 and the positive electrode terminal 20 are welded. In this embodiment, since the welding is performed along the longitudinal direction of the bus bar 30, the welding line 32 is formed along the longitudinal direction. In this embodiment, the case where the bus bar 30 is welded to the positive electrode terminal 30 will be described, but the structure of the bus bar 30 is the same even when the bus bar 30 is welded to the negative electrode terminal 22.

図５（ｂ）または図５（ｃ）に示すように、ブスバー３０には正極端子２０が接合する面の長手方向に沿って、所定間隔で接合溝３１が複数設けられている。接合溝３１は、正極端子２０のキャップ体１０ａから突出した突出端の端面の表面積以上の大きさであって、ブスバー３０の厚み未満の深さである凹部である。   As shown in FIG. 5B or FIG. 5C, the bus bar 30 is provided with a plurality of joining grooves 31 at predetermined intervals along the longitudinal direction of the surface to which the positive electrode terminal 20 is joined. The joining groove 31 is a recess having a size equal to or larger than the surface area of the end face of the protruding end protruding from the cap body 10 a of the positive electrode terminal 20 and a depth less than the thickness of the bus bar 30.

正極端子２０をブスバー３０と接合した状態が図３又は図４である。正極端子２０は、ブスバー３０の接合溝３１に嵌め込まれる。ブスバー３０に嵌め込まれた正極端子２０の突出端の端面は図４に示すように接合溝３１の内部でブスバー３０の面と接する。ブスバー３０の接合溝３１に正極端子２０が嵌め込まれた状態で、図５（ａ）に示すブスバー３０の接合溝３１が設けられた面と対向するブスバー３０の面であって、接合溝３１と対向する箇所から溶接線３２に沿ってレーザ溶接される重ね合わせ溶接の例である。レーザ溶接されることによって、正極端子２０とブスバー３０は接合する。正極端子２０はブスバー３０に設けられた接合溝３１に嵌め込まれた状態で溶接されるため、図４に示すように正極端子２０と接合するブスバー３０の箇所の厚みは、接合溝３１が設けられていないブスバー３０の箇所の厚みに比べて薄くなっている。したがって、図４に示すように、ブスバー３０の接合溝３１が設けられた面と対向するブスバー３０の面で溶接線３２に沿ってレーザ溶接した場合、ブスバーを介して正極端子２０の突出端の端面までレーザを照射することの困難性を解消することが可能となる。   The state in which the positive electrode terminal 20 is joined to the bus bar 30 is shown in FIG. The positive terminal 20 is fitted into the joining groove 31 of the bus bar 30. The end face of the protruding end of the positive electrode terminal 20 fitted into the bus bar 30 is in contact with the surface of the bus bar 30 inside the joining groove 31 as shown in FIG. In the state where the positive electrode terminal 20 is fitted in the joining groove 31 of the bus bar 30, the surface of the bus bar 30 facing the surface provided with the joining groove 31 of the bus bar 30 shown in FIG. It is an example of the lap welding which is laser-welded along the welding line 32 from the opposing location. The positive electrode terminal 20 and the bus bar 30 are joined by laser welding. Since the positive electrode terminal 20 is welded in a state where it is fitted in the joining groove 31 provided in the bus bar 30, the thickness of the portion of the bus bar 30 joined to the positive electrode terminal 20 is provided with the joining groove 31 as shown in FIG. 4. It is thinner than the thickness of the bus bar 30 that is not. Therefore, as shown in FIG. 4, when laser welding is performed along the weld line 32 on the surface of the bus bar 30 opposite to the surface where the joining groove 31 of the bus bar 30 is provided, the protruding end of the positive electrode terminal 20 is connected via the bus bar. It becomes possible to eliminate the difficulty of irradiating the laser to the end face.

ブスバー３０の厚みを厚くすると大電流を流すことができる一方、ブスバー３０の厚みが溶接の障害となり、正極端子２０を溶接することが困難である。しかし、ブスバー３０自体の厚みは厚い状態で、正極端子２０と接合するブスバー３０の箇所のみを接合溝３１を設けて厚みを薄くしている。そのため、ブスバー３０は、接合溝３１が設けられた面と対向するブスバー３０の面における溶接線３２に沿った正極端子２０とのレーザ溶接が容易になされる。ブスバー３０は、例えば、アルミ、ニッケル、銅またはアルミの合金など単一の材料で作成されている。アルミの合金としては、例えばアルミと銅の合金である。   When the thickness of the bus bar 30 is increased, a large current can flow. On the other hand, the thickness of the bus bar 30 becomes an obstacle to welding, and it is difficult to weld the positive electrode terminal 20. However, the bus bar 30 itself is thick, and only the portion of the bus bar 30 to be joined to the positive electrode terminal 20 is provided with the joining groove 31 to reduce the thickness. Therefore, the bus bar 30 can be easily laser-welded with the positive electrode terminal 20 along the weld line 32 on the surface of the bus bar 30 facing the surface where the joining groove 31 is provided. The bus bar 30 is made of a single material such as aluminum, nickel, copper, or an alloy of aluminum. As an alloy of aluminum, for example, an alloy of aluminum and copper is used.

図７は、ブスバー３０の他に実施形態を示す図である。図６は、蓋体１０ａと対向するブスバー３０に接合溝３１が設けられた面を示す図とブスバー３０の断面図を示している。図７は、図６の示すブスバー３０に対して接合溝３１が設けられた面とは逆の面であるブスバー３０の面にスリット３８を設けた例である。スリット３８は、接合溝３１と対向する位置であって、ブスバー３０の厚さ方向に対してスリット３８が設けられている。図７に示すように、接合溝３１が設けられた面から見たスリット３８の大きさは、接合溝３１の大きさと比べて小さい。そしてスリット３８は、接合溝３１と空間的に連続となる深さを有している。本実施形態では、ブスバー３０の長手方向に沿って、ブスバー３０にはスリット３８が１つ設けられているが、数は任意に設けられていてよい。   FIG. 7 is a view showing an embodiment in addition to the bus bar 30. FIG. 6 shows a view of the bus bar 30 facing the lid 10a and a cross-sectional view of the bus bar 30 in which the bonding groove 31 is provided. FIG. 7 is an example in which a slit 38 is provided on the surface of the bus bar 30 which is the surface opposite to the surface on which the joining groove 31 is provided with respect to the bus bar 30 shown in FIG. The slit 38 is a position facing the bonding groove 31, and the slit 38 is provided in the thickness direction of the bus bar 30. As shown in FIG. 7, the size of the slit 38 as viewed from the surface where the bonding groove 31 is provided is smaller than the size of the bonding groove 31. The slit 38 has a depth that is spatially continuous with the bonding groove 31. In the present embodiment, one slit 38 is provided in the bus bar 30 along the longitudinal direction of the bus bar 30, but the number may be arbitrarily provided.

図７に示すように正極端子２０がブスバー３０の接合溝３１に嵌め込まれる位置にスリット３８が設けられているため、図６に示すスリット３８を設けないブスバー３０と正極端子２０との溶接に比べて、隅肉溶接または突き合わせ溶接などによって容易に溶接をすることができる。   As shown in FIG. 7, since the slit 38 is provided at a position where the positive electrode terminal 20 is fitted into the joining groove 31 of the bus bar 30, compared with welding of the bus bar 30 and the positive electrode terminal 20 without the slit 38 shown in FIG. 6. Thus, welding can be easily performed by fillet welding or butt welding.

また、図８および図９は、アルミなどの屈曲性に弱い材料を別の材料で補強した例である。ブスバー３０は、接合溝３１が設けられた面とは逆の面であるブスバー３０の面側が、例えばアルミなどの屈曲性の弱い材料である一枚の板状部材３６と、接合溝３１が設けられたブスバー３０の面側が例えば銅またはニッケルなどの材料で接合溝３１が設けられた穴空部材３４の２層のクラッド構造となっている。ブスバー３０に設けた接合溝３１およびブスバー３０と正極端子２０との溶接については、上記同様である。   8 and 9 show examples in which a material that is weak in flexibility such as aluminum is reinforced with another material. In the bus bar 30, the surface side of the bus bar 30, which is the surface opposite to the surface on which the bonding groove 31 is provided, is provided with a single plate-like member 36 made of a material having low flexibility, such as aluminum, and the bonding groove 31. The surface side of the bus bar 30 thus formed has a two-layer clad structure of a perforated member 34 provided with a joining groove 31 made of a material such as copper or nickel. The welding of the joining groove 31 provided in the bus bar 30 and the bus bar 30 to the positive electrode terminal 20 is the same as described above.

図８に示すように、ブスバー３０は、アルミで構成された板状部材３８と、銅などで構成された穴空部材３４のクラッド構造のため、屈曲性の弱い材料である板状部材３８を銅などの材料で作成される穴空部材３４で補強する構造となっている。したがって、ブスバー３０が例えばアルミ又作成されている場合に比べてブスバー３０の剛性が高まる。また、ブスバー３０に銅の層３６が設けられているためブスバー３０の抵抗を低減し、導電性も高まる利点を有する。   As shown in FIG. 8, the bus bar 30 has a clad structure of a plate-like member 38 made of aluminum and a perforated member 34 made of copper or the like. The hole member 34 made of a material such as copper is reinforced. Accordingly, the rigidity of the bus bar 30 is increased as compared with the case where the bus bar 30 is made of, for example, aluminum. Further, since the copper layer 36 is provided on the bus bar 30, there is an advantage that the resistance of the bus bar 30 is reduced and the conductivity is increased.

本実施形態では、ブスバー３０はアルミで作成された部材と銅で作成された部材の２層の積層で構成されている例について説明したが、ブスバー３０が、接合溝３１が設けられた面からアルミで作成された部材、銅で作成された部材、アルミで作成された部材の順で多層に積層された複数の部材で構成されていてもよい。   In the present embodiment, the bus bar 30 has been described with respect to an example in which the bus bar 30 is composed of two layers of a member made of aluminum and a member made of copper. You may be comprised with the several member laminated | stacked in the order of the member created with aluminum, the member created with copper, and the member created with aluminum in order.

この発明は上述した実施形態に限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化できる。また、上記実施形態に開示されている複数の構成要素の適宜な組み合わせにより、種々の発明を形成できる。実施の形態に示される全構成要素から幾つかの構成要素を削除してもよいし、異なる実施形態にわたる構成要素を適宜組み合わせてもよい。   The present invention is not limited to the above-described embodiment, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. Some constituent elements may be deleted from all the constituent elements shown in the embodiments, or constituent elements over different embodiments may be appropriately combined.

本発明の実施形態に係る捲回型電極電池を一部切欠いて示す斜視図。The perspective view which cuts and shows the winding type electrode battery which concerns on embodiment of this invention partially. 本発明の実施形態に係る正極端子を示す斜視図。The perspective view which shows the positive electrode terminal which concerns on embodiment of this invention. 本発明の実施形態に係る正極端子およびブスバーの接合を示す斜視図。The perspective view which shows joining of the positive electrode terminal and bus bar which concern on embodiment of this invention. 本発明の実施形態に係る正極端子とブスバーの接合を示す横方向断面図。The transverse direction sectional view showing joining of the positive electrode terminal and bus bar concerning the embodiment of the present invention. 本発明の実施形態に係るブスバーを示す上面図、断面図、下面図。The top view, sectional view, and bottom view which show the bus bar concerning the embodiment of the present invention. 本発明の実施形態に係るブスバーを示す断面図、下面図。Sectional drawing and bottom view which show the bus bar which concerns on embodiment of this invention. 本発明の実施形態に係るブスバーを示す断面図、下面図。Sectional drawing and bottom view which show the bus bar which concerns on embodiment of this invention. 本発明の実施形態に係るブスバーを示す断面図、下面図。Sectional drawing and bottom view which show the bus bar which concerns on embodiment of this invention. 本発明の実施形態に係る正極端子およびブスバーの接合を示す斜視図。The perspective view which shows joining of the positive electrode terminal and bus bar which concern on embodiment of this invention.

符号の説明Explanation of symbols

１…捲回型電極電池、１０…ケース、１０ａ…キャップ体、１２…電解液、１４…電極体、１６…正極接続部材、１８…負極接続部材、２０…正極端子、２０ａ…溶接部、２０ｂ…溶接部、２２…負極端子、２３…ガスケット、２４…正極板、２５…負極板、３０…ブスバー、３１…接合溝、３２…溶接線、３４…板状部材、３６…穴空部材。３８…スリット。   DESCRIPTION OF SYMBOLS 1 ... Winding type electrode battery, 10 ... Case, 10a ... Cap body, 12 ... Electrolyte, 14 ... Electrode body, 16 ... Positive electrode connection member, 18 ... Negative electrode connection member, 20 ... Positive electrode terminal, 20a ... Welding part, 20b DESCRIPTION OF SYMBOLS ... Welding part, 22 ... Negative electrode terminal, 23 ... Gasket, 24 ... Positive electrode plate, 25 ... Negative electrode plate, 30 ... Bus bar, 31 ... Joining groove, 32 ... Weld line, 34 ... Plate-shaped member, 36 ... Hole member. 38 ... Slit.

Claims (5)

電極体および電解液を内部に収納したケースと、
前記ケースを閉塞する蓋体と、
前記蓋体から突出した電極端子と、
前記電極端子が嵌め込まれた接合溝を有し、前記接合溝に嵌め込まれた前記電極端子に溶接された導体と、
を有することを特徴とする二次電池。 A case in which the electrode body and the electrolytic solution are stored, and
A lid for closing the case;
An electrode terminal protruding from the lid;
A conductor welded to the electrode terminal fitted in the joint groove, having a joint groove fitted with the electrode terminal;
A secondary battery comprising: 前記導体は前記蓋体と対向する第１面と前記第１面に対向した第２面を有した板状であり、前記接合溝は、前記第１面に設けられ、前記接合溝と対向する前記第２面の部分が前記電極端子と溶接されることを特徴とする請求項１記載の二次電池。   The conductor has a plate shape having a first surface facing the lid and a second surface facing the first surface, and the joining groove is provided on the first surface and faces the joining groove. The secondary battery according to claim 1, wherein a portion of the second surface is welded to the electrode terminal. 前記導体は単一材料で形成されていることを特徴とする請求項２記載の二次電池。   The secondary battery according to claim 2, wherein the conductor is made of a single material. 前記導体は、前記第２面から前記導体の厚み方向に前記接合溝まで延びたスリットを有することを特徴とする請求項３記載の二次電池。   The secondary battery according to claim 3, wherein the conductor has a slit extending from the second surface to the joining groove in a thickness direction of the conductor. 前記導体は、前記接合溝が形成されるとともに前記第１面側に設けられた第１の部材と、前記第２面側に前記第１の部材と異なる材料で形成された板状の第２の部材とで構成されていることを特徴とする請求項２記載の二次電池。   The conductor includes a first member provided on the first surface side in which the joining groove is formed, and a plate-like second member formed on the second surface side from a material different from that of the first member. The secondary battery according to claim 2, comprising:
JP2008076816A 2008-03-24 2008-03-24 Secondary battery Pending JP2009231145A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008076816A JP2009231145A (en) 2008-03-24 2008-03-24 Secondary battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008076816A JP2009231145A (en) 2008-03-24 2008-03-24 Secondary battery

Publications (1)

Publication Number Publication Date
JP2009231145A true JP2009231145A (en) 2009-10-08

Family

ID=41246297

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008076816A Pending JP2009231145A (en) 2008-03-24 2008-03-24 Secondary battery

Country Status (1)

Country Link
JP (1) JP2009231145A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012073331A1 (en) * 2010-11-30 2012-06-07 日立ビークルエナジー株式会社 Rechargeable battery and rechargeable battery module
WO2012120821A1 (en) * 2011-03-10 2012-09-13 三洋電機株式会社 Battery assembly and battery connection method
JP2013145739A (en) * 2011-12-16 2013-07-25 Lithium Energy Japan:Kk Power storage device, manufacturing method of the same, and bus bar used for the same
EP2672547A2 (en) * 2011-04-26 2013-12-11 LG Chem, Ltd. Bus bar having a novel structure, and battery module including same
JP2014022195A (en) * 2012-07-18 2014-02-03 Toshiba Corp Battery pack
WO2014050329A1 (en) * 2012-09-27 2014-04-03 株式会社Ｇｓユアサ Electricity storage device and welding method
KR101669123B1 (en) * 2014-03-03 2016-10-25 주식회사 엘지화학 Pouch type secondary battery and battery module including the same
US9553294B2 (en) 2011-12-16 2017-01-24 Gs Yuasa International Ltd. Electric storage device, manufacturing method of electric storage device, and bus bar used for electric storage device
US9673430B2 (en) 2012-10-26 2017-06-06 Sanyo Electric Co., Ltd. Power source device, electric vehicle comprising power source device, accumulator device
JP2017199552A (en) * 2016-04-27 2017-11-02 三洋電機株式会社 Nonaqueous electrolyte secondary battery
KR20190016691A (en) * 2017-08-09 2019-02-19 에스케이이노베이션 주식회사 Cell module and its manufacturing method
CN113972446A (en) * 2016-01-29 2022-01-25 三洋电机株式会社 Power supply device, vehicle, bus bar, and method for electrically connecting battery cells

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63145588U (en) * 1987-03-14 1988-09-26
JPH09265975A (en) * 1996-03-28 1997-10-07 Yazaki Corp Electrical connection structure between battery terminals
JP2000036299A (en) * 1998-07-17 2000-02-02 Japan Storage Battery Co Ltd Battery terminal connecting plate
JP2004265610A (en) * 2003-01-23 2004-09-24 Sony Corp Lead terminal and power supply device
JP2009080963A (en) * 2007-09-25 2009-04-16 Gs Yuasa Corporation:Kk Connection structure between terminals

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63145588U (en) * 1987-03-14 1988-09-26
JPH09265975A (en) * 1996-03-28 1997-10-07 Yazaki Corp Electrical connection structure between battery terminals
JP2000036299A (en) * 1998-07-17 2000-02-02 Japan Storage Battery Co Ltd Battery terminal connecting plate
JP2004265610A (en) * 2003-01-23 2004-09-24 Sony Corp Lead terminal and power supply device
JP2009080963A (en) * 2007-09-25 2009-04-16 Gs Yuasa Corporation:Kk Connection structure between terminals

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5624157B2 (en) * 2010-11-30 2014-11-12 日立オートモティブシステムズ株式会社 Secondary battery and secondary battery module
US9461296B2 (en) 2010-11-30 2016-10-04 Hitachi Automotive Systems, Ltd. Secondary battery and secondary battery module
WO2012073331A1 (en) * 2010-11-30 2012-06-07 日立ビークルエナジー株式会社 Rechargeable battery and rechargeable battery module
WO2012120821A1 (en) * 2011-03-10 2012-09-13 三洋電機株式会社 Battery assembly and battery connection method
JP6072674B2 (en) * 2011-03-10 2017-02-01 三洋電機株式会社 Battery assembly and battery connection method
US9520585B2 (en) 2011-03-10 2016-12-13 Sanyo Electric Co., Ltd. Assembled battery and cell connection method
EP2672547A4 (en) * 2011-04-26 2014-03-12 Lg Chemical Ltd Bus bar having a novel structure, and battery module including same
EP2672547A2 (en) * 2011-04-26 2013-12-11 LG Chem, Ltd. Bus bar having a novel structure, and battery module including same
US9136521B2 (en) 2011-04-26 2015-09-15 Lg Chem, Ltd. Bus bar having novel structure and battery module including the same
US10741871B2 (en) 2011-12-16 2020-08-11 Gs Yuasa International Ltd. Electric storage device, manufacturing method of electric storage device, and bus bar used for electric storage device
JP2013145739A (en) * 2011-12-16 2013-07-25 Lithium Energy Japan:Kk Power storage device, manufacturing method of the same, and bus bar used for the same
US9553294B2 (en) 2011-12-16 2017-01-24 Gs Yuasa International Ltd. Electric storage device, manufacturing method of electric storage device, and bus bar used for electric storage device
JP2014022195A (en) * 2012-07-18 2014-02-03 Toshiba Corp Battery pack
WO2014050329A1 (en) * 2012-09-27 2014-04-03 株式会社Ｇｓユアサ Electricity storage device and welding method
JPWO2014050329A1 (en) * 2012-09-27 2016-08-22 株式会社Ｇｓユアサ Power storage device and welding method
US9673430B2 (en) 2012-10-26 2017-06-06 Sanyo Electric Co., Ltd. Power source device, electric vehicle comprising power source device, accumulator device
KR101669123B1 (en) * 2014-03-03 2016-10-25 주식회사 엘지화학 Pouch type secondary battery and battery module including the same
CN113972446A (en) * 2016-01-29 2022-01-25 三洋电机株式会社 Power supply device, vehicle, bus bar, and method for electrically connecting battery cells
JP2017199552A (en) * 2016-04-27 2017-11-02 三洋電機株式会社 Nonaqueous electrolyte secondary battery
KR20190016691A (en) * 2017-08-09 2019-02-19 에스케이이노베이션 주식회사 Cell module and its manufacturing method
KR102271383B1 (en) * 2017-08-09 2021-06-29 에스케이이노베이션 주식회사 Cell module and its manufacturing method

Similar Documents

Publication Publication Date Title
JP2009231145A (en) Secondary battery
US10056587B2 (en) Assembled battery
JP2018106806A (en) Bus bar, power storage module, and wiring module
JP2007026945A (en) Battery and manufacturing method thereof
JP2006221938A (en) Film packaged electric storage device
JP2009231267A (en) Battery module, and manufacturing method of battery module
JP5649996B2 (en) Square sealed secondary battery and method for manufacturing the same
JPWO2013065523A1 (en) Battery pack and prismatic secondary battery for use in the battery pack
KR20120025389A (en) Square-sealed type secondary battery
JP2019106274A (en) Square secondary battery and manufacturing method thereof
JP6476746B2 (en) STORAGE DEVICE, POWER SUPPLY MODULE, AND METHOD FOR MANUFACTURING STORAGE DEVICE
JP5269834B2 (en) Secondary battery
US11581544B2 (en) Energy storage device and energy storage device production method
JP6184747B2 (en) Prismatic secondary battery
JP6192992B2 (en) Prismatic secondary battery
JP2007273193A (en) Electrochemical device
JP2005267880A (en) Battery pack
JP7008461B2 (en) Power storage element and manufacturing method of power storage element
JP5259152B2 (en) Battery cell, battery pack, and battery cell manufacturing method
JP2015079654A (en) Tab lead and power storage device
KR200490873Y1 (en) A connection structure of pouch type battery
JP6133680B2 (en) Prismatic secondary battery
CN114467159A (en) Electricity storage device
JP2015056341A (en) Power storage module
JP2005340048A (en) Manufacturing method of sealed battery

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20101005

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20120827

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120904

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20121105

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20121204