JP2008140601A - Battery pack - Google Patents

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JP2008140601A
JP2008140601A JP2006323807A JP2006323807A JP2008140601A JP 2008140601 A JP2008140601 A JP 2008140601A JP 2006323807 A JP2006323807 A JP 2006323807A JP 2006323807 A JP2006323807 A JP 2006323807A JP 2008140601 A JP2008140601 A JP 2008140601A
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electrode
tab
metal plate
battery pack
lithium ion
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JP4955373B2 (en
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Masakatsu Kasai
正勝 笠井
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Tokin Corp
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NEC Tokin Corp
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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 battery pack capable of performing measures for stress relaxation and heat radiation for an electrode tab using a comparatively small amount of parts. <P>SOLUTION: A power generation element is sealed with a laminated film consisting of a metallic foil and a resin; a metal plate 4 is bonded, with an adhesive, to a lithium ion battery 1 having an electrode tab 9 connected to a positive electrode and an electrode tab 10 connected to a negative electrode; a tab 3 for connection is connected to the metal plate 4 by a screw 5 and a nut 6; and the tab 3 for connection is connected to the electrode tab 10 by welding. A wire rod 15 for drawing an electrode is also connected to the metal plate 4 by the screw 5 and the nut 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は二次電池の電池パックに関し、特にリチウムイオン電池やリチウムイオンポリマー電池による大容量化に適した放熱構造および電極取り出し構造を有する電池パック関する。   The present invention relates to a battery pack for a secondary battery, and more particularly to a battery pack having a heat dissipation structure and an electrode extraction structure suitable for increasing the capacity of a lithium ion battery or a lithium ion polymer battery.

近年の電子機器、特に携帯電話、ノート型パーソナルコンピュータ、ビデオカメラなどの携帯用情報機器の発達や普及に伴い、小型、軽量で、かつエネルギー密度が高い二次電池の需要が大きく伸張し、なお、高性能化の検討がなされている。このような二次電池として特にリチウムイオン二次電池が注目されている。   With the development and popularization of portable information devices such as mobile phones, notebook personal computers, and video cameras in recent years, the demand for secondary batteries that are small, lightweight, and have high energy density has greatly increased. Considering higher performance. As such a secondary battery, a lithium ion secondary battery is particularly attracting attention.

リチウムイオン二次電池の一般的な構造は、特許文献１などに示され、リチウム−コバルト複合酸化物などの正極活物質粉末、導電性粉末、及びバインダからなる正極活物質層をアルミニウム箔からなる正極集電体表面に形成してなる正極と、炭素系の負極活物質粉末、及びバインダからなる負極活物質層を銅箔からなる負極集電体表面に形成してなる負極を、多孔質のフィルムからなるセパレータを介して重ね、電解液を含浸し発電素子としたものである。   A general structure of a lithium ion secondary battery is shown in Patent Document 1 and the like, and a positive electrode active material layer made of a positive electrode active material powder such as a lithium-cobalt composite oxide, a conductive powder, and a binder is made of an aluminum foil. A positive electrode formed on the surface of the positive electrode current collector, a negative electrode formed by forming a negative electrode active material layer made of a carbon-based negative electrode active material powder and a binder on the surface of the negative electrode current collector made of copper foil, A power generation element is obtained by stacking with a separator made of a film and impregnating with an electrolytic solution.

小型化、軽量化のために、電解液を高分子電解質に替えたリチウムイオンポリマー電池が用いられ、また発電素子を封入する外装材としてアルミニウムなどの金属箔と高分子フィルムからなるラミネートフィルムが用いられている。   In order to reduce size and weight, lithium ion polymer batteries whose electrolytes are replaced with polymer electrolytes are used, and laminate films made of metal foil such as aluminum and polymer films are used as exterior materials to enclose power generation elements. It has been.

図５はラミネートフィルムを外装に用いた従来の二次電池の一例を示す斜視図である。図５において、発電素子をラミネートフィルム１１により封入してリチウムイオン電池が構成され、発電素子の正極に接続された電極タブ９と負極に接続された電極タブ１０をそれぞれラミネートフィルムより突出させて設けている。   FIG. 5 is a perspective view showing an example of a conventional secondary battery using a laminate film as an exterior. In FIG. 5, a power generation element is enclosed with a laminate film 11 to form a lithium ion battery, and an electrode tab 9 connected to the positive electrode of the power generation element and an electrode tab 10 connected to the negative electrode are provided so as to protrude from the laminate film. ing.

特開２００５−１２９２３４号公報JP 2005-129234 A 特開２００４−３１２８１号公報Japanese Patent Laid-Open No. 2004-3281 特開２００５−５６６５５号公報JP 2005-56655 A

従来、ラミネートリチウムイオン電池への入出力線は、上記の電極タブ９、１０に引き出し線を半田付けなどにより接続して取り出している。また、電極タブに直接半田付けによる熱が伝わることを避ける為には、あらかじめ別の接続用タブに半田付けなどによりに引き出し線を取り付けておき、その接続用タブを、抵抗溶接、超音波溶接などで電極タブ９、１０へ固定する方法を取っていた。このように引き出し線を取り付けたラミネートリチウムイオン電池の構成例である斜視図を図６に示す。図６において、接続用タブ１３に引き出し線１４が取り付けられ電極タブ１０に固定されている。図示されていないが、電極タブ９にも同様に引き出し線が固定される。   Conventionally, input / output lines to the laminated lithium ion battery are taken out by connecting lead wires to the electrode tabs 9 and 10 by soldering or the like. In addition, in order to avoid heat from being soldered directly to the electrode tab, a lead wire is attached to another connection tab in advance by soldering, etc., and the connection tab is connected by resistance welding or ultrasonic welding. The method of fixing to the electrode tabs 9 and 10 was taken. FIG. 6 is a perspective view showing a configuration example of a laminated lithium ion battery to which the lead wires are attached in this way. In FIG. 6, the lead wire 14 is attached to the connection tab 13 and fixed to the electrode tab 10. Although not shown, a lead wire is similarly fixed to the electrode tab 9.

しかし、近年のラミネートイオン電池を搭載する装置の多様化や電池の大容量化などから、使用時に流される電流が増加する傾向にあり、それに伴い引き出し線１４の径が太くなり、電池パックの組み立て時や取り扱い時に電極タブ９、１０に加わるストレスが増加し、この結果、これらの電極タブとラミネートフィルムの封止部の境界付近や、上述の接続用タブを使用する場合はその接続用タブ１３と電極タブ１０との境界付近でタブ材の破断などの不具合が発生しやすくなってきている。   However, due to the diversification of devices equipped with laminate ion batteries and the increase in battery capacity in recent years, the current that flows during use tends to increase. As a result, the diameter of the lead wire 14 increases and the battery pack is assembled. The stress applied to the electrode tabs 9 and 10 at the time of handling and handling increases. As a result, when the connection tabs are used near the boundary between the electrode tabs and the sealing portion of the laminate film, the connection tabs 13 are used. In the vicinity of the boundary between the electrode tab 10 and the electrode tab 10, problems such as breakage of the tab material are likely to occur.

また、同時に電流の増加に伴い、電池本体やタブ部での発熱も大きくなる傾向にあり、同部位の放熱のための対策も必要となってきている。通常、上記問題は電極タブの板厚を増すことにより解決可能であるが、ラミネートフィルムによる封止能力の限界から、電極タブの板圧は、際限なく厚くすることは出来ない。   At the same time, as the current increases, heat generation in the battery body and the tab portion tends to increase, and measures for heat dissipation at the same part are also required. Usually, the above problem can be solved by increasing the plate thickness of the electrode tab, but the plate pressure of the electrode tab cannot be increased without limit due to the limit of the sealing ability by the laminate film.

また、このような放熱の課題を解決するため、特許文献２、３に示されるように、従来は発電素子や電極タブとは独立に放熱板を二次電池に取り付ける構成が用いられている。しかし、このように放熱対策部品と、電気的接続部品が別々の部品として取り付けられているため、部品点数が増加するという問題が有った。また、これらの場合は上記の太い引き出し線接続による電極タブへのストレス増加の問題には対処することができない。   In order to solve such a problem of heat dissipation, as shown in Patent Documents 2 and 3, conventionally, a configuration in which a heat dissipation plate is attached to a secondary battery independently of a power generation element and an electrode tab is used. However, since the heat dissipation countermeasure component and the electrical connection component are attached as separate components as described above, there is a problem that the number of components increases. Further, in these cases, the problem of increased stress on the electrode tab due to the thick lead wire connection cannot be dealt with.

そこで、本発明の課題は、比較的少ない部品点数で電極タブへのストレス緩和や放熱のための対策を実施することが出来る電池パックを提供することにある。   Therefore, an object of the present invention is to provide a battery pack that can implement measures for stress relaxation and heat dissipation to electrode tabs with a relatively small number of parts.

上記課題を解決するため、本発明の電池パックは、正極、負極、および電解質を有する発電素子を金属箔と樹脂からなるラミネートフィルムで封入してなり、前記正極または負極に接続された電極タブを有する二次電池を少なくとも１つ以上設置して構成され、前記二次電池に固着され、かつ、前記電極タブに接続された金属板を少なくとも１つ以上有することを特徴とする。   In order to solve the above problems, a battery pack of the present invention includes a power generation element having a positive electrode, a negative electrode, and an electrolyte sealed with a laminate film made of a metal foil and a resin, and an electrode tab connected to the positive electrode or the negative electrode. It comprises at least one or more secondary batteries, and has at least one metal plate fixed to the secondary battery and connected to the electrode tab.

また、容量増加のため、前記二次電池を複数個積層して構成されてもよい。   Further, a plurality of the secondary batteries may be stacked to increase the capacity.

また、前記金属板は前記二次電池を挟むように複数個設置されてもよく、前記二次電池が並列または直列またはそれらの組み合わせで互いに接続されるように前記金属板と前記電極タブが接続されてもよい。   Further, a plurality of the metal plates may be installed so as to sandwich the secondary battery, and the metal plate and the electrode tab are connected so that the secondary batteries are connected to each other in parallel or in series or a combination thereof. May be.

また、前記金属板の少なくとも１つに電極引き出し用の線材が固定されていてもよく、また、大容量に対応するため、前記線材の外径が３ｍｍ以上であってもよい。   In addition, an electrode lead wire may be fixed to at least one of the metal plates, and the outer diameter of the wire may be 3 mm or more in order to cope with a large capacity.

また、本発明による効果を大きく生かすためには、本発明の電池パックの容量は１Ａｈ以上であってもよい。   In order to make the most of the effects of the present invention, the capacity of the battery pack of the present invention may be 1 Ah or more.

以上のように、本発明では、二次電池へ金属板を固着し、その金属板に接続タブや引き出し線を固定することにより、電極タブに加わるストレスを金属板で吸収して接続部の破断を防止し、かつ、二次電池や接続タブ部での発熱を金属板で吸熱することにより放熱対策が達成できる。金属板としては導電性、放熱性に優れた銅またはその合金やアルミまたはその合金製の金属板を用いることができ、金属板は二次電池に粘着材などで固着することができる。   As described above, in the present invention, by fixing the metal plate to the secondary battery and fixing the connection tab and the lead wire to the metal plate, the stress applied to the electrode tab is absorbed by the metal plate and the connection portion is broken. In addition, heat dissipation measures can be achieved by absorbing heat generated in the secondary battery and the connection tab portion with the metal plate. As the metal plate, copper or an alloy thereof excellent in conductivity and heat dissipation, or a metal plate made of aluminum or an alloy thereof can be used, and the metal plate can be fixed to the secondary battery with an adhesive or the like.

以上のように、本発明により比較的少ない部品点数で電極タブへのストレス緩和や放熱のための対策を実施することが出来る電池パックが得られる。   As described above, according to the present invention, it is possible to obtain a battery pack that can implement measures for stress relaxation and heat dissipation to the electrode tab with a relatively small number of parts.

次に、本発明の実施の形態について図面を参照して詳細に説明する。   Next, embodiments of the present invention will be described in detail with reference to the drawings.

図１は本発明の第一の実施の形態である電池パックの一例を示す分解斜視図である。図１において、図５に示した従来の二次電池と同様に、正極、負極、および電解質を有する発電素子を金属箔と樹脂からなるラミネートフィルムで封入してなるリチウムイオン電池１を設置して構成され、発電素子の正極に接続された電極タブ９と負極に接続された電極タブ１０を有している。   FIG. 1 is an exploded perspective view showing an example of a battery pack according to the first embodiment of the present invention. In FIG. 1, similarly to the conventional secondary battery shown in FIG. 5, a lithium ion battery 1 in which a power generation element having a positive electrode, a negative electrode, and an electrolyte is sealed with a laminate film made of a metal foil and a resin is installed. The electrode tab 9 is configured and connected to the positive electrode of the power generation element, and the electrode tab 10 is connected to the negative electrode.

さらに、リチウムイオン電池１の平面形状と同程度以上の大きさを有する金属板４が粘着材によりリチウムイオン電池１に固着され、かつ、接続用タブ３がネジ５とナット６により金属板４に接続され、その接続用タブ３が電極タブ１０に抵抗溶接や超音波溶接により接続されている。また、金属板４には電極引き出し用の線材１５が上記のネジ５とナット６により固定されている。   Further, a metal plate 4 having a size equal to or larger than the planar shape of the lithium ion battery 1 is fixed to the lithium ion battery 1 with an adhesive, and the connection tab 3 is attached to the metal plate 4 with screws 5 and nuts 6. The connection tab 3 is connected to the electrode tab 10 by resistance welding or ultrasonic welding. Further, a wire 15 for drawing out an electrode is fixed to the metal plate 4 by the screw 5 and the nut 6 described above.

このときの金属板４と接続用タブ３および線材１５との固定は、上記のネジ止めの他に、溶接、ハンダ付け、タブ端子形状による圧着接続などでもよい。   At this time, the metal plate 4 and the connection tab 3 and the wire 15 may be fixed by welding, soldering, or crimping connection using a tab terminal shape, in addition to the above-described screwing.

金属板４の板厚については、取り付けられる線材１５の線径により適当な板厚のものを選択するが、ラミネートリチウムイオン電池の軽量性を損なわない程度の板厚を選択する必要があり、このためには０．５〜１．５ｍｍの範囲にあることが望ましい。   As for the plate thickness of the metal plate 4, an appropriate plate thickness is selected according to the wire diameter of the wire 15 to be attached. However, it is necessary to select a plate thickness that does not impair the lightness of the laminated lithium ion battery. Therefore, it is desirable to be in the range of 0.5 to 1.5 mm.

本発明の場合、金属板４は電極に接続されて電位を持つことになるため、リチウムイオン電池１と金属板４の間には絶縁シートを設けることが望ましい。これは、万が一ラミネートフィルム表面の絶縁層に傷が生じたり、微小な異物がこの間に混入した場合にリチウムイオン電池１と金属板４が短絡することを防ぐ為である。   In the case of the present invention, since the metal plate 4 is connected to the electrode and has a potential, it is desirable to provide an insulating sheet between the lithium ion battery 1 and the metal plate 4. This is to prevent the lithium ion battery 1 and the metal plate 4 from being short-circuited if the insulating layer on the surface of the laminate film is damaged or a minute foreign matter is mixed in between.

図２はそのような絶縁シートをリチウムイオン電池１と金属板４の間に挿入した場合の電池パックの部分断面図である。リチウムイオン電池１に粘着材で絶縁シート７が固着され、その上に金属板４が同様に粘着材で固着される。ここで、絶縁シート７は、およそ０．２５ｍｍ〜０．５ｍｍの厚みを持ち、材質はＰＣ(ポリカーボネート)、変性ＰＰＥなどを選択することができる。   FIG. 2 is a partial cross-sectional view of the battery pack when such an insulating sheet is inserted between the lithium ion battery 1 and the metal plate 4. The insulating sheet 7 is fixed to the lithium ion battery 1 with an adhesive, and the metal plate 4 is similarly fixed to the lithium ion battery 1 with the adhesive. Here, the insulating sheet 7 has a thickness of approximately 0.25 mm to 0.5 mm, and a material such as PC (polycarbonate) or modified PPE can be selected.

なお、図１には金属板４はリチウムイオン電池１の上側に設置されて電極タブ１０に接続されているが、本実施の形態においては、下側にも金属板を設置してその金属板を接続タブを介して電極タブ９に接続することもできる。また、金属板４の大きさは、線材１５によるストレス回避と放熱の必要性を考慮して決定することができ、必ずしもリチウムイオン電池１の平面形状と同程度以上の大きさを有する必要はない。   In FIG. 1, the metal plate 4 is installed on the upper side of the lithium ion battery 1 and connected to the electrode tab 10. However, in the present embodiment, a metal plate is also installed on the lower side and the metal plate 4. Can also be connected to the electrode tab 9 via a connection tab. Further, the size of the metal plate 4 can be determined in consideration of the need for stress avoidance and heat dissipation by the wire 15, and does not necessarily have to be as large as the planar shape of the lithium ion battery 1. .

図３は本発明による電池パックの第二の実施の形態の一例を示す分解斜視図である。図３において、正極、負極、および電解質を有する発電素子を金属箔と樹脂からなるラミネートフィルムで封入してなるリチウムイオン電池２１および２２の２つを設置して構成され、リチウムイオン電池２１は正極に接続された電極タブ２３と負極に接続された電極タブ２４を有し、リチウムイオン電池２２は正極に接続された電極タブ２５と負極に接続された電極タブ２６を有している。   FIG. 3 is an exploded perspective view showing an example of the second embodiment of the battery pack according to the present invention. In FIG. 3, two lithium ion batteries 21 and 22 formed by enclosing a power generation element having a positive electrode, a negative electrode, and an electrolyte with a laminate film made of a metal foil and a resin are installed. The electrode tab 23 is connected to the negative electrode, and the electrode tab 24 is connected to the negative electrode. The lithium ion battery 22 has an electrode tab 25 connected to the positive electrode and an electrode tab 26 connected to the negative electrode.

リチウムイオン電池２１にはその平面形状と同程度以上の大きさを有する金属板２７が粘着材により図示されていない絶縁シートを介してリチウムイオン電池２１の上面に固着され、かつ、接続用タブ２８がネジとナットにより金属板２７に接続され、その接続用タブ２８が電極タブ２４に溶接により接続され単体電池４０を構成している。   A metal plate 27 having a size equal to or larger than the planar shape of the lithium ion battery 21 is fixed to the upper surface of the lithium ion battery 21 via an insulating sheet (not shown) with an adhesive, and a connection tab 28 is provided. Are connected to the metal plate 27 by screws and nuts, and the connection tabs 28 are connected to the electrode tabs 24 by welding to constitute a unit cell 40.

同様にリチウムイオン電池２２はその平面形状と同程度以上の大きさを有する金属板２９が粘着材により図示されていない絶縁シートを介してリチウムイオン電池２２の上面に固着され、かつ、接続用タブ３０がネジとナットにより金属板２９に接続され、その接続用タブ３０が電極タブ２５に溶接により接続され単体電池４１を構成している。   Similarly, in the lithium ion battery 22, a metal plate 29 having a size equal to or larger than the planar shape is fixed to the upper surface of the lithium ion battery 22 through an insulating sheet (not shown) with an adhesive material, and a connection tab is provided. 30 is connected to the metal plate 29 by screws and nuts, and the connection tab 30 is connected to the electrode tab 25 by welding to constitute a unit cell 41.

本実施の形態の電池パックは、大容量化のため、単体電池４０と４１を積層して構成されており、金属板２９とリチウムイオン電池２１の下面との間にも絶縁シートが挿入されている。図４は本実施の形態の積層構成を示す電池パックの部分断面図である。   The battery pack of the present embodiment is configured by stacking unit cells 40 and 41 to increase capacity, and an insulating sheet is inserted between the metal plate 29 and the lower surface of the lithium ion battery 21. Yes. FIG. 4 is a partial cross-sectional view of the battery pack showing the laminated structure of the present embodiment.

また、図３に示すように、本実施の形態においては、金属板２７、２９にはそれぞれ接続用タブを固定したネジとナットにより電極引き出し用の線材３１および３２が固定されている。電池パックの容量が大きい場合、例えば少なくとも１Ａｈ以上の容量を有する場合には、発熱を防ぐため線材の外径は３ｍｍ以上であることが望ましく、このように太い線材を用いても本発明による構成では、電極タブに加わるストレスを緩和でき、電極部分の破断等を防止することができる。   As shown in FIG. 3, in the present embodiment, wire plates 31 and 32 for drawing out electrodes are fixed to the metal plates 27 and 29 by screws and nuts to which connection tabs are fixed, respectively. When the capacity of the battery pack is large, for example, when it has a capacity of at least 1 Ah, it is desirable that the outer diameter of the wire is 3 mm or more in order to prevent heat generation. Even if such a thick wire is used, the configuration according to the present invention Then, stress applied to the electrode tab can be alleviated, and breakage of the electrode portion can be prevented.

また、図には示されていないが、リチウムイオン電池２１と２２を並列接続する場合は、接続用タブと電極タブを溶接するときに、接続用タブ２８と電極タブ２４、２６を一緒に接続し、接続用タブ３０と電極タブ２３、２５を一緒に接続しても良い。また、金属板２７と２９にそれぞれ２つの接続用タブを設けて接続しても良い。直列接続する場合は、その接続用のタブを金属板に設けることもできる。   Although not shown in the drawing, when the lithium ion batteries 21 and 22 are connected in parallel, when the connection tab and the electrode tab are welded, the connection tab 28 and the electrode tabs 24 and 26 are connected together. The connection tab 30 and the electrode tabs 23 and 25 may be connected together. Alternatively, the metal plates 27 and 29 may be connected by providing two connection tabs. When connecting in series, a tab for the connection can be provided on the metal plate.

上記は単体電池２個を積層する場合について説明したが、単体電池の積層数が増えても、同様の構造の繰り返しで構成できる。また、本実施の形態において、金属板２７、２９は積層型のラミネートリチウムイオン電池を形成後その上面および下面にそれぞれ設置することも可能であり、この場合、金属板２９はリチウムイオン電池２２の下面に設置されることになる。   In the above description, the case where two unit cells are stacked has been described. However, even if the number of unit cells is increased, the same structure can be repeated. In the present embodiment, the metal plates 27 and 29 can be installed on the upper surface and the lower surface of the laminated laminated lithium ion battery, respectively. In this case, the metal plate 29 is the lithium ion battery 22. It will be installed on the lower surface.

以上のように、本発明により比較的少ない部品点数で電極タブへのストレス緩和や放熱のための対策を実施することが出来る電池パックが得られる。   As described above, according to the present invention, it is possible to obtain a battery pack that can implement measures for stress relaxation and heat dissipation to the electrode tab with a relatively small number of parts.

なお、本発明の電池パックは上記の実施の形態に限られるものではないことは言うまでもなく、例えば、使用目的に応じて、金属板の形状や大きさ、接続用タブの形状や構造、接続方法、線材の接続方法などは変更可能であり、また、金属板の一部の形状を変えれば接続用タブを用いないで電極タブを直接金属板に接続することも可能である。   Needless to say, the battery pack of the present invention is not limited to the above-described embodiment. For example, depending on the purpose of use, the shape and size of the metal plate, the shape and structure of the connection tab, and the connection method The connecting method of the wire can be changed, and the electrode tab can be directly connected to the metal plate without using the connection tab if the shape of a part of the metal plate is changed.

本発明の第一の実施の形態である電池パックの一例を示す分解斜視図。The disassembled perspective view which shows an example of the battery pack which is 1st embodiment of this invention. 絶縁シートをリチウムイオン電池と金属板の間に挿入した場合の電池パックの部分断面図。The fragmentary sectional view of a battery pack at the time of inserting an insulating sheet between a lithium ion battery and a metal plate. 本発明による電池パックの第二の実施の形態の一例を示す分解斜視図。The disassembled perspective view which shows an example of 2nd embodiment of the battery pack by this invention. 第二の実施の形態の積層構成を示す電池パックの部分断面図。The fragmentary sectional view of the battery pack which shows the laminated structure of 2nd embodiment. ラミネートフィルムを外装に用いた従来の二次電池の一例を示す斜視図。The perspective view which shows an example of the conventional secondary battery which used the laminate film for the exterior. 引き出し線を取り付けたラミネートリチウムイオン電池の構成例の斜視図。The perspective view of the structural example of the lamination lithium ion battery which attached the lead wire.

符号の説明Explanation of symbols

１、２１、２２ リチウムイオン電池
４、２７，２９ 金属板
３、１３、２８、３０ 接続用タブ
９、１０、２３、２４、２５、２６ 電極タブ
１５、３１、３２ 線材
５ ネジ
６ ナット
７ 絶縁シート
１１ ラミネートフィルム
１４ 引き出し線
４０、４１ 単体電池 1, 2, 22 Lithium ion battery 4, 27, 29 Metal plate 3, 13, 28, 30 Connection tab 9, 10, 23, 24, 25, 26 Electrode tab 15, 31, 32 Wire rod 5 Screw 6 Nut 7 Insulation Sheet 11 Laminate film 14 Lead wires 40, 41 Single battery

Claims (7)

正極、負極、および電解質を有する発電素子を金属箔と樹脂からなるラミネートフィルムで封入してなり、前記正極または負極に接続された電極タブを有する二次電池を少なくとも１つ以上設置して構成され、前記二次電池に固着され、かつ、前記電極タブに接続された金属板を少なくとも１つ以上有することを特徴とする電池パック。   A power generation element having a positive electrode, a negative electrode, and an electrolyte is sealed with a laminate film made of a metal foil and a resin, and is configured by installing at least one secondary battery having an electrode tab connected to the positive electrode or the negative electrode. A battery pack comprising at least one metal plate fixed to the secondary battery and connected to the electrode tab. 前記二次電池を複数個積層して構成されたことを特徴とする請求項１記載の電池パック。   The battery pack according to claim 1, wherein a plurality of the secondary batteries are stacked. 前記金属板は前記二次電池を挟むように複数個設置されていることを特徴とする請求項１または２記載の電池パック。   The battery pack according to claim 1, wherein a plurality of the metal plates are installed so as to sandwich the secondary battery. 前記二次電池が並列または直列またはそれらの組み合わせで互いに接続されるように前記金属板と前記電極タブが接続されたことを特徴とする請求項２または３に記載の電池パック。   The battery pack according to claim 2 or 3, wherein the metal plate and the electrode tab are connected so that the secondary batteries are connected to each other in parallel, in series, or a combination thereof. 前記金属板の少なくとも１つに電極引き出し用の線材が固定されていることを特徴とする請求項１から４のいずれか１項に記載の電池パック。   5. The battery pack according to claim 1, wherein an electrode lead wire is fixed to at least one of the metal plates. 6. 前記線材の外径が３ｍｍ以上であることを特徴とする請求項５に記載の電池パック。   The battery pack according to claim 5, wherein an outer diameter of the wire is 3 mm or more. 容量が１Ａｈ以上であることを特徴とする請求項１から６のいずれか１項に記載の電池パック。   The battery pack according to any one of claims 1 to 6, wherein the capacity is 1 Ah or more.
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* Cited by examiner, † Cited by third party
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CN102347462A (en) * 2010-07-21 2012-02-08 三洋电机株式会社 Nonaqueous secondary battery and nonaqueous secondary battery pack
WO2012081311A1 (en) * 2010-12-16 2012-06-21 株式会社村田製作所 Battery
WO2013005650A1 (en) * 2011-07-05 2013-01-10 株式会社日立製作所 Nonaqueous electrolyte battery module
JP2016167809A (en) * 2011-10-14 2016-09-15 アナログ・デバイシズ・インコーポレーテッド Dynamically reconfigurable pipelined pre-processor

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JPH01248463A (en) * 1988-03-30 1989-10-04 Matsushita Electric Ind Co Ltd Sealed lead-acid battery
JPH09265973A (en) * 1996-03-28 1997-10-07 Yuasa Corp Terminal structure for flat battery

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Publication number Priority date Publication date Assignee Title
JPS62216148A (en) * 1986-03-17 1987-09-22 Matsushita Electric Ind Co Ltd Enclosed lead storage battery
JPH01248463A (en) * 1988-03-30 1989-10-04 Matsushita Electric Ind Co Ltd Sealed lead-acid battery
JPH09265973A (en) * 1996-03-28 1997-10-07 Yuasa Corp Terminal structure for flat battery

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102347462A (en) * 2010-07-21 2012-02-08 三洋电机株式会社 Nonaqueous secondary battery and nonaqueous secondary battery pack
WO2012081311A1 (en) * 2010-12-16 2012-06-21 株式会社村田製作所 Battery
JP5333684B2 (en) * 2010-12-16 2013-11-06 株式会社村田製作所 battery
WO2013005650A1 (en) * 2011-07-05 2013-01-10 株式会社日立製作所 Nonaqueous electrolyte battery module
CN103069611A (en) * 2011-07-05 2013-04-24 株式会社日立制作所 Nonaqueous electrolyte battery module
JP2016167809A (en) * 2011-10-14 2016-09-15 アナログ・デバイシズ・インコーポレーテッド Dynamically reconfigurable pipelined pre-processor

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