JP5699811B2 - Storage battery - Google Patents

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JP5699811B2
JP5699811B2 JP2011120259A JP2011120259A JP5699811B2 JP 5699811 B2 JP5699811 B2 JP 5699811B2 JP 2011120259 A JP2011120259 A JP 2011120259A JP 2011120259 A JP2011120259 A JP 2011120259A JP 5699811 B2 JP5699811 B2 JP 5699811B2
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support member
power generation
generation element
storage battery
wall portion
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JP2012248462A5 (en
JP2012248462A (en
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澄男 森
森　　澄男
智典 加古
智典 加古
明彦 宮▲崎▼
明彦 宮▲崎▼
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GS Yuasa International 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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Description

本願発明は、筐体内に発電要素や電解液などの蓄電・放電手段が収容される蓄電池に関し、特に前記発電要素が集電部材によって筐体内に吊り下げ状態で保持される蓄電池に関する。   The present invention relates to a storage battery in which power storage elements such as a power generation element and an electrolytic solution are accommodated in a casing, and more particularly to a storage battery in which the power generation element is held in a suspended state in a casing by a current collecting member.

近年、ハイブリッド自動車や電気自動車、アシスト自転車のように、駆動源や駆動源の一部として電力を用いる走行車が注目されており、このような走行車の電源として高いエネルギー容量の蓄電池（二次電池）が実用化されている。例えば、非水電解質二次電池（リチウムイオン電池）などが前記高いエネルギー容量の蓄電池として挙示することができる。   In recent years, driving vehicles that use electric power as a driving source or a part of the driving source, such as hybrid vehicles, electric vehicles, and assist bicycles, are attracting attention. Battery) has been put into practical use. For example, a non-aqueous electrolyte secondary battery (lithium ion battery) or the like can be listed as the high energy capacity storage battery.

このような蓄電池の内部構造としては、金属などからなる剛性の高い筐体に電力を供給したり蓄えたりするための電極端子が絶縁状態で取り付けられ、前記電極端子に接続され、前記筐体の内壁と接触しないように内壁に沿って配置される集電部材と、二つの集電部材の間を架橋状態で発電要素が配置される構造が採用されている。   As an internal structure of such a storage battery, an electrode terminal for supplying and storing power to a highly rigid casing made of metal or the like is attached in an insulated state, connected to the electrode terminal, A structure is adopted in which a power collecting element is disposed in a bridged state between a current collecting member disposed along the inner wall and the two current collecting members so as not to contact the inner wall.

しかし、前記蓄電池は、筐体の中で重量のある発電要素が吊り下げられた状態で保持されている構造となっている。従って、前記走行車などに取り付けられた前記蓄電池は、前記走行車の発進や停止の際の振動や走行中の振動などにより比較的重量のある発電要素が揺さぶられ、集電部材が変形したり破損することとなり、筐体内部で短絡や不導通が発生する可能性がある。   However, the storage battery has a structure in which a heavy power generation element is held in a housing. Therefore, in the storage battery attached to the traveling vehicle or the like, the power generation element having a relatively heavy weight is shaken by the vibration at the start or stop of the traveling vehicle or the vibration during traveling, and the current collecting member is deformed. It will be damaged, and there is a possibility that a short circuit or non-conduction will occur inside the housing.

そこで、特許文献１や特許文献２には、筐体の底部と発電要素との間に発泡樹脂からなるスペーサーを配置し、発電要素を振動や衝撃から保護することのできる蓄電池が記載されている。   Therefore, Patent Document 1 and Patent Document 2 describe a storage battery in which a spacer made of foamed resin is disposed between the bottom of the housing and the power generation element, and the power generation element can be protected from vibration and impact. .

特開２００６−４０８９９号公報JP 2006-40899 A 特開２００２−２３１２９７号公報JP 2002-231297 A

ところが昨今では、自動車などに用いられる蓄電池のさらなる長寿命化が要求されるに至り、蓄電池の耐振動性の向上が望まれている。   However, recently, it has been required to further extend the life of storage batteries used in automobiles and the like, and improvement in vibration resistance of storage batteries is desired.

本願発明者は、このような蓄電池に対し鋭意研究を行い、蓄電池の寿命を損ねる原因が、電極から発電要素に向かう方向（集電部材が延在する方向）の振動によることを見出すに至った。つまり、前記方向の振動が長期間にわたり発生し続ける結果、発電要素の頂点部分がスペーサーに衝突し続けることとなる。そして、スペーサーが徐々に変形していき、最終的には、発電要素の頂点部分と変形したスペーサーとが衝突し続けることとなる。その結果、発電要素の機能が損なわれ、蓄電池の寿命の短縮化につながることを見出すに至った。   The inventor of the present application has conducted intensive research on such a storage battery, and has found that the cause of impairing the life of the storage battery is due to vibration in the direction from the electrode toward the power generation element (the direction in which the current collecting member extends). . That is, as a result of the vibration in the above direction being continuously generated over a long period of time, the apex portion of the power generation element continues to collide with the spacer. Then, the spacer gradually deforms, and finally, the apex portion of the power generation element and the deformed spacer continue to collide. As a result, it has been found that the function of the power generation element is impaired and the life of the storage battery is shortened.

本願発明は、上記知見に基づきなされたものであり、長期的に振動を受けた場合でも安定して機能を維持し長寿命を実現しうる蓄電池の提供を目的とする。   The present invention has been made based on the above knowledge, and an object of the present invention is to provide a storage battery that can stably maintain its function and realize a long life even when subjected to vibration for a long time.

上記目的を達成するために、本願発明にかかる蓄電池は、矩形の底部と、前記底部の一の辺部に立設される矩形の第一壁部と、前記底部の前記辺部と対峙する他の辺部に立設される矩形の第二壁部と、前記底部のさらに他の辺部にそれぞれ立設される矩形の第三壁部、および、第四壁部とを備える角型筒状の筐体と、巻回軸が前記第一壁部に沿い前記第三壁部と交差するように前記筐体に収容される発電要素と、前記底部側に配置されるとともに、前記発電要素の湾曲部外面において巻回軸に沿って線状、または、短冊状に接触し、前記底部、または、前記第一壁部に接触して前記発電要素を支持する第一支持部材と、前記底部側に配置されるとともに、前記発電要素の頂点部に対し前記第一支持部材の反対側に前記第一支持部材と空間を隔てて配置され、前記発電要素の湾曲部外面において巻回軸に沿って線状、または、短冊状に接触し、前記底部、または、前記第二壁部に接触して前記発電要素を支持する第二支持部材とを備え、前記発電要素の頂点部は、前記空間に面していることを特徴とする。 In order to achieve the above object, a storage battery according to the present invention includes a rectangular bottom portion, a rectangular first wall portion standing on one side portion of the bottom portion, and the side portion of the bottom portion facing each other. A rectangular cylindrical shape comprising a rectangular second wall portion standing on the side portion, a rectangular third wall portion standing on the other side portion of the bottom portion, and a fourth wall portion A power generation element housed in the housing such that a winding axis crosses the third wall portion along the first wall portion, and is disposed on the bottom side, and A first support member that contacts the power generation element in contact with the bottom or the first wall by contacting the bottom or the first wall along the winding axis on the outer surface of the curved portion, and the bottom side together is disposed, said first support member and the space on the opposite side of the first support member relative to the apex portion of the power generating element septum Arranged on the outer surface of the curved portion of the power generation element so as to contact the linear or strip shape along the winding axis, and to contact the bottom or the second wall portion to support the power generation element. and a second support member, the vertex portion of the power generating element, characterized that you have facing the space.

これによれば、発電要素は、湾曲部の頂点以外において少なくとも２線で支持されることとなり、発電要素の頂点は、第一支持部材と第二支持部材との間に設けられる空間に面することとなる。従って、蓄電池に長期間にわたって振動が発生しても、発電要素の頂点部と支持部材（第一支持部材、および、第二支持部材、第三支持部材の総称、以下同じ）とが衝突することがなく、発電要素が損傷することによる蓄電池の機能の低下を回避することが可能となる。また、発電要素の荷重が第一支持部材と第二支持部材とにより少なくとも２線に分散して支持されるため、発電要素の損傷箇所を分散させて長寿命化を図ることが可能となる。   According to this, the power generation element is supported by at least two lines other than the apex of the curved portion, and the apex of the power generation element faces the space provided between the first support member and the second support member. It will be. Therefore, even if vibration occurs in the storage battery for a long period of time, the apex portion of the power generation element and the support member (the first support member, the second support member, the generic name of the third support member, and so on) collide with each other. Therefore, it is possible to avoid a decrease in the function of the storage battery due to damage to the power generation element. In addition, since the load of the power generation element is supported by being distributed in at least two lines by the first support member and the second support member, it is possible to extend the life by dispersing the damaged portions of the power generation element.

また、前記第一支持部材は、管軸が巻回軸に沿うように配置される管形状であってもよい。   Moreover, the said 1st supporting member may be a pipe | tube shape arrange | positioned so that a pipe axis may follow a winding axis | shaft.

これによれば、耐薬品性を備えた樹脂や金属などを支持部材の材料として選定した場合でも、軽量な支持部材とすることができ、蓄電池全体の重量の増加を抑えることが可能となる。   According to this, even when resin or metal having chemical resistance is selected as the material of the support member, the support member can be made light, and an increase in the weight of the entire storage battery can be suppressed.

また、管状の前記第一支持部材は、管内部が気密状態となるように閉塞されていてもよい。   The tubular first support member may be closed so that the inside of the tube is in an airtight state.

これによれば、前記効果に加えて気体によるクッション性、復元性を支持部材に付与することが可能となる。さらに、支持部材の内方に液体が浸入しないため、蓄電池に必要な電解液などの量を低下させることが可能となる。   According to this, in addition to the above effects, it is possible to impart cushioning properties and restoring properties by gas to the support member. Further, since the liquid does not enter the inside of the support member, it is possible to reduce the amount of the electrolytic solution necessary for the storage battery.

さらに、前記第一支持部材と前記第二支持部材とを接続する接続部材を備えていてもかまわない。   Furthermore, you may provide the connection member which connects said 1st support member and said 2nd support member.

これによれば、第一支持部材と第二支持部材との位置関係（間隔）を予め筐体の中で固定することができるため、蓄電池を組み立てる際に発電要素と支持部材と筐体との関係を容易に決定することが可能となる。   According to this, since the positional relationship (interval) between the first support member and the second support member can be fixed in the housing in advance, when the storage battery is assembled, the power generation element, the support member, and the housing The relationship can be easily determined.

さらに、前記第一壁部から前記第二壁部に至る方向に並べられる複数の発電要素と、隣り合う前記発電要素の湾曲部外面のそれぞれにおいて巻回軸に沿って線状、または、短冊状に接触し、前記底部に接触して前記発電要素を支持する第三支持部材とを備えるものでもかまわない。   Furthermore, a plurality of power generation elements arranged in a direction from the first wall portion to the second wall portion, and a linear shape or a strip shape along the winding axis in each of the curved portion outer surfaces of the adjacent power generation elements And a third support member that contacts the bottom and supports the power generation element.

これによれば、一つの筐体の内方に複数の発電要素を備える蓄電池であっても、発電要素は、湾曲部の頂点以外において少なくとも２線で支持されることとなり、発電要素の頂点は、隣り合う支持部材との間に設けられる空間に面することとなる。従って、蓄電池に長期間にわたって振動が発生しても、発電要素の頂点部と支持部材とが衝突することがなく、発電要素が損傷することによる蓄電池の機能の低下を回避することが可能となる。   According to this, even in a storage battery including a plurality of power generation elements inside one housing, the power generation elements are supported by at least two lines other than the vertex of the curved portion, and the vertex of the power generation element is It faces the space provided between the adjacent support members. Therefore, even if vibration occurs in the storage battery for a long period of time, the apex portion of the power generation element and the support member do not collide, and it is possible to avoid deterioration of the function of the storage battery due to damage to the power generation element. .

本願発明によれば、長期にわたって振動を受けた場合でも、安定して性能を維持することのできる蓄電池を提供することが可能となる。   According to the present invention, it is possible to provide a storage battery capable of stably maintaining performance even when subjected to vibration over a long period of time.

図１は、蓄電池の外観を模式的に示す斜示図である。FIG. 1 is a perspective view schematically showing the external appearance of the storage battery. 図２は、筐体の壁部の一部を省略して蓄電池の内部を模式的に示す斜示図である。FIG. 2 is a perspective view schematically showing the inside of the storage battery with a part of the wall portion of the housing omitted. 図３は、第四壁部を省略して筐体の内方を示す平面図である。FIG. 3 is a plan view showing the inside of the housing with the fourth wall portion omitted. 図４は、筐体の壁部の一部を省略して蓄電池の内部を模式的に示す斜示図である。FIG. 4 is a perspective view schematically showing the inside of the storage battery with a part of the wall portion of the housing omitted. 図５は、第四壁部を省略して筐体の内方を示す平面図である。FIG. 5 is a plan view showing the inside of the housing with the fourth wall portion omitted. 図６は、第四壁部を省略して筐体の内方を示す平面図である。FIG. 6 is a plan view showing the inside of the housing with the fourth wall portion omitted. 図７は、第四壁部を省略して筐体の内方を示す平面図である。FIG. 7 is a plan view showing the inside of the housing with the fourth wall portion omitted. 図８は、第四壁部を省略して筐体の内方を示す平面図である。FIG. 8 is a plan view showing the inside of the housing with the fourth wall portion omitted. 図９は、第四壁部を省略して筐体の内方を示す平面図である。FIG. 9 is a plan view showing the inside of the housing with the fourth wall portion omitted. 図１０は、第四壁部を省略して筐体の内方を示す平面図である。FIG. 10 is a plan view showing the inside of the housing with the fourth wall portion omitted. 図１１は、第四壁部を省略して筐体の内方を示す平面図である。FIG. 11 is a plan view showing the inside of the housing with the fourth wall portion omitted.

次に、本願発明に係る蓄電池の実施の形態について、図面を参照しつつ説明する。なお、以下の実施の形態は、本願発明に係る蓄電池の一例を示したものに過ぎない。従って本願発明は、以下の実施の形態を参考に請求の範囲の文言によって範囲が画定されるものであり、以下の実施の形態のみに限定されるものではない。   Next, an embodiment of a storage battery according to the present invention will be described with reference to the drawings. In addition, the following embodiment is only what showed an example of the storage battery which concerns on this invention. Accordingly, the scope of the present invention is defined by the wording of the claims with reference to the following embodiments, and is not limited to the following embodiments.

（実施の形態１）
図１は、蓄電池の外観を模式的に示す斜示図である。 (Embodiment 1)
FIG. 1 is a perspective view schematically showing the external appearance of the storage battery.

図２は、筐体の壁部の一部を省略して蓄電池の内部を模式的に示す斜示図である。なお、壁部とは、第一壁部〜第四壁部の総称である。   FIG. 2 is a perspective view schematically showing the inside of the storage battery with a part of the wall portion of the housing omitted. In addition, a wall part is a general term for a 1st wall part-a 4th wall part.

これらの図に示すように、本願発明にかかる蓄電池１００は、電気を充電し、また、電気を放電することのできる二次電池であり、より具体的には、非水電解液二次電池（例えばリチウムイオン電池）等である。蓄電池１００は、発電要素１０１と、筐体１０２と、電極端子１０３と、集電部材１０４と、支持部材１０５である第一支持部材１５１と、第二支持部材１５２とを備えている。なお、蓄電池１００の筐体１０２の内部には液状又はポリマー状の電解質が封入されるが、当該液体の図示は省略する。   As shown in these drawings, the storage battery 100 according to the present invention is a secondary battery that can charge electricity and discharge electricity, more specifically, a non-aqueous electrolyte secondary battery ( For example, a lithium ion battery). The storage battery 100 includes a power generation element 101, a housing 102, an electrode terminal 103, a current collecting member 104, a first support member 151 that is a support member 105, and a second support member 152. Note that a liquid or polymer electrolyte is sealed in the housing 102 of the storage battery 100, but the liquid is not shown.

筐体１０２は、発電要素１０１を収容する矩形箱状の部材であり、矩形の底部１２５と、底部１２５の一の辺部（本実施の形態の場合、Ｙ軸に沿う辺の手前側の辺）に立設される矩形の第一壁部１２１と、底部１２５の前記辺部と対峙する他の辺部（本実施の形態の場合、Ｙ軸に沿う辺の奥側の辺）に立設される矩形の第二壁部１２２と、底部１２５のさらに他の辺部（本実施の形態の場合、Ｘ軸に沿う辺）にそれぞれ立設される矩形の第三壁部１２３、および、第四壁部１２４とを備えている。本実施の形態の場合、筐体１０２は、金属からなる有底の矩形筒状であり、筐体１０２の開口部は、矩形の蓋体１２６により閉塞されるものとなっている。   The casing 102 is a rectangular box-shaped member that houses the power generation element 101, and has a rectangular bottom 125 and one side of the bottom 125 (in this embodiment, the side on the near side of the side along the Y axis). ) Standing on the rectangular first wall 121 standing on the other side (in the case of the present embodiment, on the back side of the side along the Y axis) facing the side of the bottom 125. A rectangular second wall portion 122, a rectangular third wall portion 123 erected on the other side portion of the bottom portion 125 (in the case of the present embodiment, a side along the X axis), and And four wall portions 124. In the present embodiment, the housing 102 is a bottomed rectangular cylinder made of metal, and the opening of the housing 102 is closed by a rectangular lid 126.

発電要素１０１は、本実施の形態の場合、詳細な図示は省略するが、巻回軸（同図中Ｙ軸）と垂直な断面（ＸＺ平面）形状が長円形状となるように巻回される巻回型の発電要素であって、巻回軸が第一壁部１２１、および、第二壁部１２２に沿い、第三壁部１２３、および、第四壁部１２４と交差するように筐体１０２に収容される部材である。発電要素１０１は、セパレータと負極と正極とを備え、電気を蓄えることができる部材である。例えば、負極は、銅からなる長尺帯状の負極集電体シートの表面に負極活物質層が形成されたものである。正極は、アルミニウムからなる長尺帯状の正極集電体シートの表面に正極活物質層が形成されたものである。セパレータは、樹脂からなる微多孔性のシートである。そして、発電要素１０１は、負極と正極との間にセパレータが挟み込まれるように層状に配置されたものを長さ方向に全体が長円形状となるように巻き回されて形成されている。また、発電要素１０１の巻回軸方向の両端部にはそれぞれ集電部材１０４が前記巻回軸方向と垂直な方向に延びて配置されている。   In the present embodiment, the power generation element 101 is wound so that a cross-sectional shape (XZ plane) perpendicular to the winding shaft (Y-axis in the figure) is an ellipse, although detailed illustration is omitted. A winding-type power generation element having a winding axis along the first wall portion 121 and the second wall portion 122 and intersecting the third wall portion 123 and the fourth wall portion 124. It is a member accommodated in the body 102. The power generation element 101 includes a separator, a negative electrode, and a positive electrode, and is a member that can store electricity. For example, the negative electrode is one in which a negative electrode active material layer is formed on the surface of an elongated current collector sheet made of copper. In the positive electrode, a positive electrode active material layer is formed on the surface of a long belt-shaped positive electrode current collector sheet made of aluminum. The separator is a microporous sheet made of resin. And the electric power generation element 101 is formed by winding what is arranged in layers so that the separator is sandwiched between the negative electrode and the positive electrode so that the whole becomes an elliptical shape in the length direction. In addition, current collecting members 104 are arranged at both ends of the power generation element 101 in the winding axis direction so as to extend in a direction perpendicular to the winding axis direction.

なお、セパレータは、樹脂からなるものばかりでなく、ガラスファイバーなど他の部材であってもかまわない。また、図において発電要素１０１は、模式的に柱状体として図示しているが、当該直方体の長手方向がセパレータなどを巻き回した軸と沿うものとしている。   The separator is not limited to one made of resin, but may be another member such as glass fiber. Moreover, although the electric power generation element 101 is schematically illustrated as a columnar body in the drawing, the longitudinal direction of the rectangular parallelepiped is assumed to be along an axis around which a separator or the like is wound.

電極端子１０３は、発電要素１０１に蓄えられている電気を筐体１０２の外部空間に導出し、また、発電要素１０１に電気を蓄えるために筐体１０２の内部空間に電気を導入するための端子であり、筐体１０２の内部空間から外部空間にまたがって取り付けられている。本実施の形態の場合、電極端子１０３は、筐体１０２の蓋体１２６に取り付けられている。また、筐体１０２（蓋体１２６）が金属製であるため、筐体１０２と絶縁し、かつ、筐体１０２との隙間を埋めて筐体１０２の内部空間を封止するためのパッキン（図示せず）を介して筐体１０２と電極端子１０３とが接続されている。なお、蓄電池１００は、電極端子１０３として負極端子１３１、および、正極端子１３２を備えている。   The electrode terminal 103 is a terminal for introducing electricity stored in the power generation element 101 to the external space of the housing 102 and for introducing electricity into the internal space of the housing 102 in order to store electricity in the power generation element 101. It is attached over the external space from the internal space of the housing 102. In the case of the present embodiment, the electrode terminal 103 is attached to the lid 126 of the housing 102. Further, since the housing 102 (lid body 126) is made of metal, a packing (see FIG. 5) is provided for insulating the housing 102 and filling the gap with the housing 102 to seal the internal space of the housing 102. The housing 102 and the electrode terminal 103 are connected via a not-shown). The storage battery 100 includes a negative electrode terminal 131 and a positive electrode terminal 132 as the electrode terminals 103.

集電部材１０４は、電極端子１０３と発電要素１０１とに電気的に接続されるとともに機械的にも接続され、発電要素１０１と第三壁部１２３や第四壁部１２４との間に配置される導電性と剛性とを備えた部材、いわゆるブスバーである。本実施の形態の場合、集電部材１０４は、第三壁部１２３、または、第四壁部１２４から蓋体１２６に渡って第三壁部１２３、または、第四壁部１２４と、蓋体１２６とに沿って屈曲状態で配置される金属製の板状部材であり、負極端子１３１と発電要素１０１の負極とを結ぶ負極集電部材１４１、および、正極端子１３２と発電要素１０１の正極とを結ぶ正極集電部材１４２とで構成されている。また、集電部材１０４は、筐体１０２の内部に突出している電極端子１０３の部分にリベットなどで固定的に接続されており、電極端子１０３の負極、または、正極にそれぞれ溶接などによって固定的に接続されている。これにより、発電要素１０１は、筐体１０２の内部において集電部材１０４、および、電極端子１０３により、吊り下げられた状態で保持される。   The current collecting member 104 is electrically connected to the electrode terminal 103 and the power generation element 101 as well as mechanically, and is disposed between the power generation element 101 and the third wall portion 123 and the fourth wall portion 124. It is a so-called bus bar, which is a member having electrical conductivity and rigidity. In the case of the present embodiment, the current collecting member 104 includes the third wall 123 or the fourth wall 124 and the lid from the third wall 123 or the fourth wall 124 to the lid 126. 126, and a negative electrode current collecting member 141 that connects the negative electrode terminal 131 and the negative electrode of the power generation element 101, and the positive electrode terminal 132 and the positive electrode of the power generation element 101. And a positive electrode current collecting member 142 that connects the two. The current collecting member 104 is fixedly connected to a portion of the electrode terminal 103 protruding inside the housing 102 with a rivet or the like, and is fixed to the negative electrode or the positive electrode of the electrode terminal 103 by welding or the like. It is connected to the. As a result, the power generation element 101 is held in a suspended state by the current collecting member 104 and the electrode terminal 103 inside the housing 102.

なお、負極集電部材１４１は、負極と同様、銅で形成され、正極集電部材１４２はアルミニウムで形成されている。   In addition, the negative electrode current collection member 141 is formed with copper like the negative electrode, and the positive electrode current collection member 142 is formed with aluminum.

また、集電部材１０４と発電要素１０１の負極や正極との接合方法は特に限定されるものでは無いが、本実施の形態の場合、溶接用のフィン１４３を集電部材１０４の一部を折り曲げることにより起立させ、フィン１４３で発電要素１０１の負極や正極を挟み込みつつ溶接により接合する方法が採用されている。   Further, the method of joining the current collecting member 104 to the negative electrode or the positive electrode of the power generation element 101 is not particularly limited, but in the present embodiment, a part of the current collecting member 104 is bent with the welding fin 143. Thus, a method of joining by welding while sandwiching the negative electrode and the positive electrode of the power generation element 101 with the fins 143 is employed.

図３は、第四壁部を省略して筐体の内方を示す平面図である。   FIG. 3 is a plan view showing the inside of the housing with the fourth wall portion omitted.

同図に示すように、蓄電池１００は、発電要素１０１の湾曲部１１１の外面において巻回軸に沿って線状、または、短冊状に接触し、底部１２５、および、第一壁部１２１に接触して発電要素１０１を支持する第一支持部材１５１と、発電要素１０１の頂点部１１２に対し第一支持部材１５１の反対側に第一支持部材１５１と非接触空間１５３を隔てて配置され、発電要素１０１の湾曲部１１１の外面において巻回軸に沿って線状、または、短冊状に接触し、底部１２５、および、第二壁部１２２に接触して発電要素１０１を支持する第二支持部材１５２とを備えている。また、第一支持部材１５１、および、第二支持部材１５２は、管軸が巻回軸に沿うように配置される管形状である。   As shown in the figure, the storage battery 100 contacts the outer surface of the curved portion 111 of the power generation element 101 in a linear or strip shape along the winding axis, and contacts the bottom portion 125 and the first wall portion 121. The first support member 151 that supports the power generation element 101 and the first support member 151 and the non-contact space 153 are arranged on the opposite side of the first support member 151 with respect to the apex portion 112 of the power generation element 101, A second support member that supports the power generating element 101 by contacting the outer surface of the curved portion 111 of the element 101 in a linear or strip shape along the winding axis and in contact with the bottom portion 125 and the second wall portion 122. 152. Moreover, the 1st support member 151 and the 2nd support member 152 are pipe | tube shapes arrange | positioned so that a pipe axis may follow a winding axis | shaft.

以上のように、第一支持部材１５１が底部１２５、および、第一壁部１２１に接触して発電要素１０１を支持し、第二支持部材１５２が底部１２５、および、第二壁部１２２に接触して発電要素１０１を支持することで、蓄電池１００が振動した場合にも、発電要素１０１がしっかりと支持されるので、発電要素１０１が損傷する事態をまぬがれる効果が大きい。   As described above, the first support member 151 contacts the bottom portion 125 and the first wall portion 121 to support the power generation element 101, and the second support member 152 contacts the bottom portion 125 and the second wall portion 122. By supporting the power generation element 101, the power generation element 101 is firmly supported even when the storage battery 100 vibrates, so that the effect of damaging the power generation element 101 is great.

本実施の形態の場合、蓄電池１００はさらに、第一支持部材１５１と第二支持部材１５２とを接続する接続部材１５４を備えており、第一支持部材１５１と第二支持部材１５２と接続部材１５４とは一体となっている。また、管形状の第一支持部材１５１、および、第二支持部材１５２は、周壁の一部が管軸方向に延在するスリットにより分離されている。   In the case of the present embodiment, the storage battery 100 further includes a connection member 154 that connects the first support member 151 and the second support member 152, and the first support member 151, the second support member 152, and the connection member 154. Is one. In addition, the tubular first support member 151 and the second support member 152 are separated by a slit in which a part of the peripheral wall extends in the tube axis direction.

第一支持部材１５１、および、第二支持部材１５２は、集電部材１０４が底部１２５に向かう方向の移動を柔軟に規制するものである。この場合、第一支持部材１５１、および、第二支持部材１５２は、発電要素１０１の湾曲部１１１の頂点部１１２以外の外面に線状、または、短冊状に接触しており、発電要素１０１の頂点部１１２は非接触空間１５３に面しているため、発電要素１０１がＺ軸方向に移動しても、頂点部１１２が支持部材１０５と接触することはない。従って、蓄電池１００に長期間にわたって振動が加えられたとしても、発電要素１０１の頂点部１１２が破損することなく、蓄電池１００の性能を維持し続けることが可能となる。   The first support member 151 and the second support member 152 flexibly regulate the movement of the current collecting member 104 in the direction toward the bottom portion 125. In this case, the first support member 151 and the second support member 152 are in contact with the outer surface other than the apex portion 112 of the curved portion 111 of the power generation element 101 in a linear or strip shape. Since the apex portion 112 faces the non-contact space 153, the apex portion 112 does not contact the support member 105 even when the power generation element 101 moves in the Z-axis direction. Therefore, even if vibration is applied to the storage battery 100 for a long period of time, it is possible to maintain the performance of the storage battery 100 without damaging the apex 112 of the power generation element 101.

本実施の形態の場合、接続部材１５４を含む支持部材１０５は、バネ弾性を備えた金属板の両端縁を折り曲げて形成されている。このように、支持部材１０５を金属で形成することで、特に電解液に対し化学的に十分に対抗することができ、また、発電要素１０１から発生する熱などにも十分に抗することができる。また、発泡樹脂からなる支持部材１０５と比べて、長期間振動が加えられても、支持部材１０５の復元力を長期間維持することができ蓄電池１００の性能の経年劣化を抑制することも可能となる。   In the case of the present embodiment, the support member 105 including the connection member 154 is formed by bending both end edges of a metal plate having spring elasticity. In this manner, by forming the support member 105 with metal, it is possible to sufficiently resist the electrolytic solution in particular, and to sufficiently resist the heat generated from the power generation element 101 and the like. . Further, as compared with the support member 105 made of foamed resin, even if vibration is applied for a long time, the restoring force of the support member 105 can be maintained for a long time, and the deterioration of the performance of the storage battery 100 can be suppressed. Become.

また、バネ弾性を備えた支持部材１０５によって発電要素１０１や筐体１０２の寸法公差を吸収し、蓄電池１００を組み立てた直後においても、発電要素１０１は、支持部材１０５と少なくとも線状に当接し、筐体１０２の内方にしっかりと支持される。従って、蓄電池１００の使用開始直後から支持部材１０５は、発電要素１０１の荷重を分散状態で支持され、発電要素１０１の損傷を可及的に抑制することが可能となる。   In addition, the power generation element 101 abuts the support member 105 at least linearly even after the dimensional tolerance of the power generation element 101 and the housing 102 is absorbed by the support member 105 having spring elasticity and the storage battery 100 is assembled. It is firmly supported inside the housing 102. Therefore, immediately after the start of use of the storage battery 100, the support member 105 is supported with the load of the power generation element 101 in a dispersed state, and it is possible to suppress damage to the power generation element 101 as much as possible.

さらに、接続部材１５４により第一支持部材１５１と第二支持部材１５２とを接続することで、蓄電池１００を組み立てる際に、筐体１０２内方の所定の位置に第一支持部材１５１と第二支持部材１５２とを容易に配置することが可能となる。   Furthermore, when the storage battery 100 is assembled by connecting the first support member 151 and the second support member 152 by the connection member 154, the first support member 151 and the second support member are placed at predetermined positions inside the housing 102. The member 152 can be easily arranged.

なお、支持部材１０５の材質は、金属に限定されるわけではなく、ポリオレフィンなどの樹脂でもかまわない。   The material of the support member 105 is not limited to metal, and may be a resin such as polyolefin.

また、筐体１０２と発電要素１０１、および、集電部材１０４とを絶縁するために、樹脂製のシート状又は袋状の絶縁部材（図示せず）が筐体１０２の内方に配置されてもかまわない。絶縁部材は、支持部材１０５と発電要素１０１（集電部材１０４含む）との間に配置されていてもよく、支持部材１０５と筐体１０２との間に配置されていてもよい。このように絶縁部材を配置することにより、支持部材１０５を本実施の形態のように導電性の物質で構成することができ支持部材１０５を構成する材料の選択範囲を広げることが可能となる。   In addition, in order to insulate the casing 102 from the power generation element 101 and the current collecting member 104, a resin sheet-like or bag-like insulating member (not shown) is disposed inside the casing 102. It doesn't matter. The insulating member may be disposed between the support member 105 and the power generation element 101 (including the current collecting member 104), or may be disposed between the support member 105 and the housing 102. By disposing the insulating member in this way, the support member 105 can be made of a conductive substance as in this embodiment, and the selection range of materials constituting the support member 105 can be expanded.

特に、発電要素１０１と支持部材１０５との間に絶縁部材が配置されると、支持部材１０５によって発電要素１０１が受ける損傷を絶縁部材がさらに抑制し、蓄電池１００をさらに長寿命とすることができる。   In particular, when an insulating member is disposed between the power generation element 101 and the support member 105, the insulation member can further suppress damage to the power generation element 101 by the support member 105, and the storage battery 100 can have a longer life. .

（実施の形態２）
次に、本願発明に係る蓄電池１００の他の実施の形態を説明する。なお、前記実施の形態１と同じ機能の部材や、同じ作用をする部位などは同じ符合を付し、その説明を省略する場合がある。 (Embodiment 2)
Next, another embodiment of the storage battery 100 according to the present invention will be described. Note that members having the same functions as those in the first embodiment and parts having the same functions are denoted by the same reference numerals, and the description thereof may be omitted.

図４は、筐体の壁部の一部を省略して蓄電池の内部を模式的に示す斜示図である。   FIG. 4 is a perspective view schematically showing the inside of the storage battery with a part of the wall portion of the housing omitted.

図５は、第四壁部を省略して筐体の内方を示す平面図である。   FIG. 5 is a plan view showing the inside of the housing with the fourth wall portion omitted.

これらの図に示すように、本願発明にかかる蓄電池１００は、支持部材１０５の態様が異なる以外は前記実施の形態１と同様である。   As shown in these drawings, the storage battery 100 according to the present invention is the same as the first embodiment except that the mode of the support member 105 is different.

同図に示すように、第一支持部材１５１、および、第二支持部材１５２は、管軸が巻回軸に沿うように配置される管形状であり、両端部が圧接されることで管内部が気密状態に閉塞されている。   As shown in the figure, the first support member 151 and the second support member 152 have a tube shape in which the tube axis is arranged along the winding axis, and both ends are pressed to contact the inside of the tube. Is closed in an airtight state.

このような 第一支持部材１５１や第二支持部材１５２を採用することにより、前記実施の形態１に記載の効果に加えて、支持部材１０５は、気体によるクッション性、復元性が高まり、より効果的に発電要素１０１を支持することが可能となる。さらに、支持部材１０５の内方に液体が浸入しないため、蓄電池に必要な電解液などの量を低下させることが可能となる。   By adopting such a first support member 151 and second support member 152, in addition to the effects described in the first embodiment, the support member 105 is more effective because of its cushioning and restoring properties by gas. Thus, the power generation element 101 can be supported. Further, since the liquid does not enter the inside of the support member 105, it is possible to reduce the amount of electrolyte solution required for the storage battery.

なお、本願発明は、上記実施の形態に限定されるものではない。例えば、本明細書において記載した構成要素を任意に組み合わせて、また、構成要素のいくつかを除外して実現される別の実施の形態を本願発明の実施の形態としてもよい。また、上記実施の形態に対して本願発明の主旨、すなわち、請求の範囲に記載される文言が示す意味を逸脱しない範囲で当業者が思いつく各種変形を施して得られる変形例も本願発明に含まれる。   In addition, this invention is not limited to the said embodiment. For example, another embodiment realized by arbitrarily combining the components described in this specification and excluding some of the components may be used as an embodiment of the present invention. In addition, the present invention includes modifications obtained by making various modifications conceivable by those skilled in the art without departing from the gist of the present invention, that is, the meaning described in the claims. It is.

例えば、図６に示すように、蓄電池１００は、第一壁部１２１から第二壁部１２２に至る方向（Ｘ軸方向）に並べられる複数の発電要素１０１を備え、隣り合う発電要素１０１の湾曲部１１１の外面のそれぞれにおいて巻回軸（Ｙ軸方向）に沿って線状、または、短冊状に接触し、底部１２５に接触して複数の発電要素１０１を支持する第三支持部材１５５を備えていてもかまわない。   For example, as illustrated in FIG. 6, the storage battery 100 includes a plurality of power generation elements 101 arranged in a direction from the first wall 121 to the second wall 122 (X-axis direction), and the adjacent power generation elements 101 are curved. Each of the outer surfaces of the portion 111 includes a third support member 155 that contacts a linear shape or a strip shape along the winding axis (Y-axis direction) and supports the plurality of power generating elements 101 by contacting the bottom portion 125. It does not matter.

このようにすることで、長期間振動を加えられた場合でも性能を維持することができる大容量の蓄電池を得ることが可能となる。   By doing in this way, it becomes possible to obtain a large-capacity storage battery capable of maintaining performance even when vibration is applied for a long time.

また、この場合でも、第一支持部材１５１と第三支持部材１５５や、第三支持部材１５５と第二支持部材１５２とが接続部材１５４で接続されるものでもよい。   Also in this case, the first support member 151 and the third support member 155, or the third support member 155 and the second support member 152 may be connected by the connection member 154.

また、図７に示すように、第一支持部材１５１や第二支持部材１５２は、発電要素１０１と筐体１０２と非接触空間１５３とで囲まれた部分に充填される発泡樹脂などでもかまわない。   Further, as shown in FIG. 7, the first support member 151 and the second support member 152 may be foamed resin filled in a portion surrounded by the power generation element 101, the housing 102, and the non-contact space 153. .

また、図８に示すように、第一支持部材１５１や第二支持部材１５２は、発泡樹脂やゴムなどからなる中実円柱状の部材であってもかまわない。   Further, as shown in FIG. 8, the first support member 151 and the second support member 152 may be solid cylindrical members made of foamed resin, rubber, or the like.

さらに、図９に示すように、板部材の端縁をカールさせた支持部材１０５であって、渦巻き状に何重にもカールさせた支持部材１０５であってもかまわない。この場合、渦巻きによりバネ力を調整することができ、最適な弾性力を備えた支持部材１０５を容易に得ることが可能となる。   Furthermore, as shown in FIG. 9, the support member 105 may be a support member 105 with the edge of the plate member curled, and the support member 105 may be curled several times in a spiral shape. In this case, the spring force can be adjusted by spiraling, and the support member 105 having an optimal elastic force can be easily obtained.

また、図１０や図１１に示すように支持部材１０５は、第一壁部１２１、または、第二壁部１２２、または、底部１２５に接触して発電要素１０１を支持するものでもかまわない。この場合、支持部材１０５は、第一壁部１２１や第二壁部１２２や底部１２５に固定される必要がある。また、プレス加工などして筐体１０２の一部を内方に膨出させて支持部材１０５としてもかまわない。   As shown in FIGS. 10 and 11, the support member 105 may be in contact with the first wall 121, the second wall 122, or the bottom 125 to support the power generating element 101. In this case, the support member 105 needs to be fixed to the first wall 121, the second wall 122, and the bottom 125. Alternatively, the support member 105 may be formed by inflating a part of the housing 102 inward by press working or the like.

また、第一支持部材１５１、および、第二支持部材１５２は、筐体１０２や図示しない絶縁部材等の部材を変形させることにより形成してもかまわない。勿論上記実施の形態のように第一支持部材１５１、および、第二支持部材１５２の機能のみを担う部材を採用してもよい。筐体１０２等を変形させて支持部材１０５を形成して支持機能と他の機能とを共有させる場合、部品点数を減らすことができるので、製造工程の簡略化及びコストの削減が可能となる。支持機能のみを備える場合には、支持機能に特化した適度な弾力を持った材質を任意の形状に加工して用いることができるので、発電要素を支持する効果がより顕著に発揮できる。   Further, the first support member 151 and the second support member 152 may be formed by deforming a member such as the casing 102 or an insulating member (not shown). Of course, as in the above-described embodiment, a member responsible only for the functions of the first support member 151 and the second support member 152 may be employed. When the support member 105 is formed by deforming the housing 102 or the like to share the support function and other functions, the number of parts can be reduced, so that the manufacturing process can be simplified and the cost can be reduced. In the case of providing only the support function, a material having an appropriate elasticity specialized for the support function can be processed into an arbitrary shape and used, so that the effect of supporting the power generation element can be exhibited more remarkably.

本願発明は、蓄電池（二次電池）に利用可能であり、特に、高い振動に長期間晒される自動車などの走行車に搭載される蓄電池に好適に利用できる。   The present invention can be used for a storage battery (secondary battery), and in particular, can be suitably used for a storage battery mounted on a traveling vehicle such as an automobile that is exposed to high vibration for a long period of time.

１００ 蓄電池
１０１ 発電要素
１０２ 筐体
１０３ 電極端子
１０４ 集電部材
１０５ 支持部材
１１１ 湾曲部
１１２ 頂点部
１２１ 第一壁部
１２２ 第二壁部
１２３ 第三壁部
１２４ 第四壁部
１２５ 底部
１２６ 蓋体
１３１ 負極端子
１３２ 正極端子
１４１ 負極集電部材
１４２ 正極集電部材
１４３ フィン
１５１ 第一支持部材
１５２ 第二支持部材
１５３ 非接触空間
１５４ 接続部材
１５５ 第三支持部材 DESCRIPTION OF SYMBOLS 100 Storage battery 101 Electric power generation element 102 Case 103 Electrode terminal 104 Current collection member 105 Support member 111 Curved part 112 Vertex part 121 First wall part 122 Second wall part 123 Third wall part 124 Fourth wall part 125 Bottom part 126 Cover 131 Negative electrode terminal 132 Positive electrode terminal 141 Negative electrode current collecting member 142 Positive electrode current collecting member 143 Fin 151 First support member 152 Second support member 153 Non-contact space 154 Connection member 155 Third support member

Claims (5)

矩形の底部と、前記底部の一の辺部に立設される矩形の第一壁部と、前記底部の前記辺部と対峙する他の辺部に立設される矩形の第二壁部と、前記底部のさらに他の辺部にそれぞれ立設される矩形の第三壁部、および、第四壁部とを備える角型筒状の筐体と、
巻回軸が前記第一壁部に沿い前記第三壁部と交差するように前記筐体に収容される発電要素と、
前記底部側に配置されるとともに、前記発電要素の湾曲部外面において巻回軸に沿って線状、または、短冊状に接触し、前記底部、または、前記第一壁部に接触して前記発電要素を支持する第一支持部材と、
前記底部側に配置されるとともに、前記発電要素の頂点部に対し前記第一支持部材の反対側に前記第一支持部材と空間を隔てて配置され、前記発電要素の湾曲部外面において巻回軸に沿って線状、または、短冊状に接触し、前記底部、または、前記第二壁部に接触して前記発電要素を支持する第二支持部材とを備え、
前記発電要素の頂点部は、前記空間に面している
蓄電池。 A rectangular bottom, a rectangular first wall erected on one side of the bottom, and a rectangular second wall erected on the other side opposite the side of the bottom A rectangular cylindrical housing provided with a rectangular third wall portion and a fourth wall portion respectively standing on the other side portion of the bottom portion; and
A power generation element housed in the housing such that a winding axis intersects the third wall portion along the first wall portion;
The power generation element is disposed on the bottom side, contacts linearly or in a strip shape along the winding axis on the outer surface of the curved portion of the power generation element, and contacts the bottom or the first wall. A first support member for supporting the element;
The winding shaft is disposed on the bottom portion side and spaced apart from the first support member on the opposite side of the first support member with respect to the apex portion of the power generation element, and on the outer surface of the curved portion of the power generation element. And a second support member that contacts the power generation element in contact with the linear or strip shape along the bottom, or the second wall portion ,
The apex portion of the power generation element faces the space
蓄 battery. 前記第一支持部材は、管軸が巻回軸に沿うように配置される管形状である
請求項１に記載の蓄電池。 2. The storage battery according to claim 1, wherein the first support member has a tube shape in which a tube axis is disposed along a winding axis. 前記第一支持部材は、管内部が気密状態に閉塞されている
請求項２に記載の蓄電池。 The storage battery according to claim 2, wherein the first support member is closed in an airtight state inside the tube. さらに、
前記第一支持部材と前記第二支持部材とを接続する接続部材
を備える請求項１に記載の蓄電池。 further,
The storage battery according to claim 1, further comprising a connection member that connects the first support member and the second support member. さらに、
前記第一壁部から前記第二壁部に至る方向に並べられる複数の発電要素と、
隣り合う前記発電要素の湾曲部外面のそれぞれにおいて巻回軸に沿って線状、または、短冊状に接触し、前記底部に接触して前記発電要素を支持する第三支持部材と
を備える請求項１に記載の蓄電池。 further,
A plurality of power generation elements arranged in a direction from the first wall portion to the second wall portion;
A third support member that contacts the power generation element in contact with the bottom portion in a linear or strip shape along a winding axis in each of the curved portion outer surfaces of the adjacent power generation elements. 1. The storage battery according to 1.
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