JP2005222703A - Connection structure between battery packs and battery pack - Google Patents
Connection structure between battery packs and battery pack Download PDFInfo
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- JP2005222703A JP2005222703A JP2004026224A JP2004026224A JP2005222703A JP 2005222703 A JP2005222703 A JP 2005222703A JP 2004026224 A JP2004026224 A JP 2004026224A JP 2004026224 A JP2004026224 A JP 2004026224A JP 2005222703 A JP2005222703 A JP 2005222703A
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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
Description
本発明は、組電池間の接続構造及び組電池に係り、特に、平板状の単電池が垂直方向に積層され互いに電気的に接続された組電池間の接続構造及び該組電池に関する。 The present invention relates to a connection structure between assembled batteries and the assembled battery, and more particularly to a connection structure between assembled batteries in which flat unit cells are stacked in the vertical direction and electrically connected to each other, and the assembled battery.
近年、二次電池を用いた電源装置の小型化、軽量化を達成するために、例えば、ラミネートフィルム等の絶縁シートで発電部を包み込んだ平板状単電池が開発されている（例えば、特許文献１参照）。このような平板状単電池は、電源装置全体のエネルギー密度を高めるために、複数個を垂直方向に積層して組電池として構成される場合がある。この種の組電池では、平板状単電池間に板状の接続ブスバ（導体）を斜めに配置して、平板状単電池を電気的に直列接続している。また、組電池の両端には外部出力端子が接続されており、この外部出力端子の部分を除き、組電池全体を包持する電気絶縁樹脂製外装ケースないし熱収縮シュリンクチューブで被覆され、組電池外部から電気的に絶縁されている。更に、平板状単電池を積層した組電池も開発されている（例えば、特許文献２参照）。 In recent years, in order to achieve a reduction in size and weight of a power supply device using a secondary battery, for example, a flat unit cell in which a power generation unit is wrapped with an insulating sheet such as a laminate film has been developed (for example, Patent Documents). 1). In order to increase the energy density of the entire power supply device, there are cases in which a plurality of such flat single cells are stacked in the vertical direction and configured as an assembled battery. In this type of assembled battery, plate-like connection bus bars (conductors) are arranged obliquely between the plate-like cells, and the plate-like cells are electrically connected in series. In addition, external output terminals are connected to both ends of the assembled battery. Except for the external output terminal portion, the assembled battery is covered with an electrically insulating resin outer case or a heat-shrinkable shrink tube that holds the entire assembled battery. It is electrically insulated from the outside. Furthermore, an assembled battery in which flat battery cells are stacked has also been developed (see, for example, Patent Document 2).
しかしながら、上記平板状単電池は、発電部がフィルムで包み込まれているため、その形態は柔く（変形し易く）不安定であり、組電池として、不安定な形態の平板状単電池を積層した場合にその固定が困難である。また、電気的な接続を行う際、同一方向に同極端子が配置されている場合に、積層された平板状単電池同士を直列に接続するときには、絶縁物で挟み込んだ金属板を斜め方向に配置する必要があるため、接続作業が煩雑である。特に、リチウム二次電池は、過充電・過放電を防止するために、各単電池の電圧を全て測定する必要があるので、配線作業が相当煩雑で、単電池間を接続する全接続ブスバが露出し、かつ、密集している状態では、組立ないし接続作業の危険を避けるために、作業効率が低下する、という問題がある。 However, since the power generation unit is wrapped in a film, the shape of the flat unit cell is soft (easily deformed) and unstable, and the assembled unit cell is laminated with an unstable type of flat unit cell. In such a case, the fixing is difficult. In addition, when the same polarity terminals are arranged in the same direction when making the electrical connection, when connecting the stacked flat unit cells in series, the metal plate sandwiched between the insulators is inclined. Since it is necessary to arrange, connection work is complicated. In particular, in order to prevent overcharge and overdischarge, lithium secondary batteries need to measure all the voltage of each unit cell, so the wiring work is considerably complicated, and all the connection busbars connecting the unit cells are not necessary. In the exposed and dense state, there is a problem that work efficiency is lowered in order to avoid a risk of assembly or connection work.
本発明は上記事案に鑑み、効率的に組み立てることができ、かつ、安全に配線作業を行うことができる組電池及び組電池間の接続構造を提供することを課題とする。 An object of the present invention is to provide an assembled battery and a connection structure between assembled batteries that can be efficiently assembled and can be safely wired.
上記課題を解決するために、本発明の第１の態様は、組電池間の接続構造であって、平板状の単電池が垂直方向に積層され互いに電気的に接続された組電池の側面に、該組電池の外部出力端子が突出しており、該突出している外部出力端子は、隣接配置される別の組電池の一方の外部出力端子と位置合わせされ、電気的に接続されていることを特徴とする。 In order to solve the above-described problems, a first aspect of the present invention is a connection structure between assembled batteries, in which flat unit cells are stacked in a vertical direction and electrically connected to each other. The external output terminal of the assembled battery protrudes, and the protruding external output terminal is aligned with and electrically connected to one external output terminal of another adjacent assembled battery. Features.
第１の態様では、組電池は、平板状の単電池が垂直方向に積層され互いに電気的に接続されており、その外部出力端子は組電池側面から突出している。このため、組電池を配置ないし収容する際に、組電池から突出している端子を基準とすることで、組電池を配置し易く組み立て作業が容易になる。 In the first aspect, the assembled battery includes flat unit cells stacked in the vertical direction and electrically connected to each other, and the external output terminal protrudes from the side surface of the assembled battery. For this reason, when the assembled battery is disposed or accommodated, the assembled battery can be easily disposed by using the terminal protruding from the assembled battery as a reference.
第１の態様において、突出している外部出力端子が正負両極いずれか一方であり、他極の外部出力端子を組電池の上面に露出させるようにすれば、組電池間の接続で、一の組電池の突出している外部出力端子を、この組電池に隣接配置される別の組電池の露出した他極の外部出力端子に位置合わせし、夫々の外部出力端子を重なるように配置することで、組電池間の外部出力端子の電気的接続が可能となるため、組電池間の接続作業が容易になる。このとき、他極の外部出力端子の上面の高さ位置を、突出している外部出力端子の先端部の背面の高さ位置と同一ないし僅かに下方の高さ位置とすれば、一の組電池の突出している外部出力端子とこの組電池に隣接配置される別の組電池の他極の外部出力端子とは必然的に略同一の高さ位置となり、突出している外部出力端子を隣接配置される別の組電池の一方の外部出力端子と重なるように位置合わせすることが極めて容易となるので、組電池間の接続作業を効率的に行うことができる。 In the first aspect, when the projecting external output terminal is either one of the positive and negative electrodes and the external output terminal of the other electrode is exposed on the upper surface of the assembled battery, one set can be connected between the assembled batteries. By aligning the protruding external output terminal of the battery with the external output terminal of the other electrode exposed adjacent to this assembled battery, and arranging each external output terminal so as to overlap, Since the external output terminals can be electrically connected between the assembled batteries, the connection work between the assembled batteries is facilitated. At this time, if the height position of the upper surface of the external output terminal of the other electrode is the same as or slightly lower than the height position of the rear surface of the tip of the protruding external output terminal, one assembled battery The projecting external output terminal and the external output terminal of the other electrode of the other assembled battery adjacent to this assembled battery are necessarily at substantially the same height, and the projecting external output terminal is disposed adjacent to the assembled battery. Therefore, it is very easy to align so that it overlaps with one external output terminal of the other assembled battery, so that the connection work between the assembled batteries can be performed efficiently.
また、上記課題を解決するために、本発明の第２の態様は、平板状の単電池が垂直方向に積層され互いに電気的に接続された組電池であって、前記単電池の正負極両端子の先端がクランク状に屈曲されて互いに一側に配設されており、垂直方向に隣接配置される別の単電池の一方の端子と位置合わせされ、電気的に接続されていることを特徴とする。 In order to solve the above problems, a second aspect of the present invention is an assembled battery in which flat unit cells are stacked in the vertical direction and electrically connected to each other, and both positive and negative ends of the unit cell are connected. The tip of the child is bent in a crank shape and arranged on one side, aligned with one terminal of another unit cell arranged adjacent in the vertical direction, and electrically connected And
第２の態様では、組電池を構成する各単電池の正負極両端子が互いに一側に配設されている訳であるが、正負極端子の先端がクランク状に屈曲されているため、単電池同士を接続する際に、各単電池から正負極端子が伸びているため接続距離が短くなると共に、垂直方向に隣接配置される別の単電池の端子と接続され組電池を構成する場合に端子間距離が広くとれるため、作業空間が大きくなり接続作業が容易に行え、且つ、その安全性が向上する。 In the second mode, the positive and negative terminals of each unit cell constituting the assembled battery are arranged on one side. However, since the ends of the positive and negative terminals are bent in a crank shape, When connecting batteries, the positive and negative terminals extend from each unit cell, so the connection distance is shortened, and when connecting to another unit cell terminal adjacent in the vertical direction to form an assembled battery Since the distance between the terminals can be widened, the work space becomes large, the connection work can be easily performed, and the safety is improved.
第２の態様において、積層された単電池間に、該単電池を位置決め保持する枠体を備えるようにすれば、平板状の単電池がフィルムで密閉されその形態が柔く不安定であっても、組電池として積層した場合に、枠体で各単電池間の位置決めと固定とを行うことができるので、組電池として安定した固定が可能となり、作業性を向上させることができる。この場合に、枠体が、単電池の外周側面の形状に対応した内部形状を有するようにすれば、単電池を側面から保持し単電池の平面部同士の接触を確保することができると共に、単電池自体の形態が不安定であっても、組電池の作業前に枠体を積層することで単電池を積層することができるので、組電池の組立作業性の効率を向上させることができ、組電池の寸法を一定とすることが可能となる。また、積層された単電池のうち端に位置する単電池の両外側に、該単電池を位置決め保持し、且つ、外部出力端子が取り付けられた外枠を備えるようにすれば、組電池の上下方向を固定でき、組電池の寸法を一定とすることができると共に、組電池の外部出力端子への接続作業が簡素化され、組電池の組立及び接続作業を効率的に行うことができる。 In the second aspect, when a frame for positioning and holding the unit cell is provided between the unit cells stacked, the flat unit cell is sealed with a film and its form is soft and unstable. In addition, when stacked as an assembled battery, positioning and fixing between the single cells can be performed with the frame, so that stable fixing as an assembled battery is possible, and workability can be improved. In this case, if the frame has an internal shape corresponding to the shape of the outer peripheral side surface of the unit cell, it can hold the unit cell from the side surface and ensure the contact between the flat portions of the unit cell, Even if the shape of the unit cell itself is unstable, it is possible to stack the unit cell by stacking the frame body before working the assembled battery, so that the efficiency of assembly workability of the assembled cell can be improved. It becomes possible to make the dimensions of the assembled battery constant. Further, if the unit cells are positioned and held on both outer sides of the unit cells located at the ends of the stacked unit cells and provided with outer frames to which external output terminals are attached, The direction can be fixed, the size of the assembled battery can be made constant, the connection work of the assembled battery to the external output terminal is simplified, and the assembled battery can be efficiently assembled and connected.
本発明の第１の態様によれば、組電池は、平板状の単電池が垂直方向に積層され互いに電気的に接続されており、その外部出力端子は組電池側面から突出しているため、組電池を配置ないし収容する際に、組電池から突出している端子を基準とすることで、組電池を配置し易く組み立て作業が容易になり、第２の態様によれば、正負極端子の先端がクランク状に屈曲されているため、単電池同士を接続する際に、各単電池から正負極端子が伸びているため接続距離が短くなると共に、垂直方向に隣接配置される別の単電池の端子と接続され組電池を構成する場合に端子間距離が広くとれるため、作業空間が大きくなり接続作業が容易に行え、且つ、その安全性が向上する、という効果を得ることができる。 According to the first aspect of the present invention, the assembled battery is composed of flat unit cells stacked in the vertical direction and electrically connected to each other, and its external output terminal projects from the side of the assembled battery. When arranging or housing the battery, the terminal protruding from the assembled battery is used as a reference, so that the assembled battery is easily arranged and the assembly operation is facilitated. According to the second aspect, the tip of the positive and negative electrode terminals is Because it is bent in the shape of a crank, when connecting cells, the positive and negative terminals extend from each cell, so the connection distance is shortened and the terminals of other cells that are adjacent to each other in the vertical direction When the assembled battery is configured by being connected to each other, the distance between the terminals can be increased, so that the work space can be increased, the connection work can be easily performed, and the safety can be improved.
以下、図面を参照して、本発明に係る組電池及び組電池間の接続構造の実施の形態について説明する。 Embodiments of an assembled battery and a connection structure between the assembled batteries according to the present invention will be described below with reference to the drawings.
（構成）
図２に示すように、本実施形態の組電池１は、全体として、単電池３を、枠体２を介して積層した構造を有しており、図１に示すように、積層された５個の単電池３、４個の枠体２、２個の外枠５、水平ブスバ１３ａ及び垂直ブスバ１３ａで構成される一組のブスバ１３、図示を省略した四角ナット、並びに、１個の配線シート６の６種の部品で構成されている。
(Constitution)
As shown in FIG. 2, the assembled battery 1 of the present embodiment has a structure in which the cells 3 are laminated through the frame 2 as a whole. As shown in FIG. Unit cell 3, four frame bodies 2, two outer frames 5, a set of bus bars 13 composed of a horizontal bus bar 13 a and a vertical bus bar 13 a, a square nut not shown, and one wiring The seat 6 is composed of six types of parts.
単電池３には、例えば、正極活物質にマンガン酸リチウム等を主要構成材料とし、負極活物質にグラファイト粉末等を主要構成材料としたリチウム二次電池が用いられている。また、単電池３は、端子を有する電極群を、例えば、ポリアミド樹脂層、アルミニウム箔層、ポリエチレン樹脂層等からなる多層膜で覆い、電解液を注液後、多層膜全周囲を熱エネルギーで溶着・密閉した平板状の形状を有している。このため、単電池３の側面には、多層膜の溶着部を境に上下方向にそれぞれ傾斜が形成されている。 As the unit cell 3, for example, a lithium secondary battery in which lithium manganate or the like is a main constituent material for a positive electrode active material and graphite powder or the like is a main constituent material for a negative electrode active material is used. The unit cell 3 covers the electrode group having terminals with a multilayer film made of, for example, a polyamide resin layer, an aluminum foil layer, a polyethylene resin layer, etc., and after pouring the electrolyte, It has a flat plate shape that is welded and sealed. For this reason, on the side surface of the unit cell 3, an inclination is formed in the vertical direction with respect to the welded portion of the multilayer film.
図２に示すように、単電池３の一側からは、段差を形成するようにクランク状に屈曲した端子４が導出されている。垂直方向に隣接して積層（配置）される単電池３間では、同一極性の端子同士が同一方向にクランク状に屈曲しており、正負極の配置が逆となっている。つまり、図２に示す上側の単電池３の正負極の端子の配置と下側の単電池３の正負極の端子の配置とが図２に示す左右方向で逆となっている。従って、本実施形態の組電池１では、厳密に云えば、端子４の屈曲方向で異なる２種類の単電池３が用いられている。図１（図４も参照）に示すように、これらの端子４は、垂直方向に隣接して積層される別の単電池３の一方の端子４と位置合わせされており、例えば、超音波溶接等により電気的に接続されている。なお、端子４は、正極にはアルミニウム製板材が用いられ、負極には銅製板材が用いられている。 As shown in FIG. 2, a terminal 4 bent into a crank shape is led out from one side of the unit cell 3 so as to form a step. Between the cells 3 stacked (arranged) adjacent to each other in the vertical direction, terminals having the same polarity are bent in a crank shape in the same direction, and the arrangement of the positive and negative electrodes is reversed. That is, the arrangement of the positive and negative terminals of the upper unit cell 3 shown in FIG. 2 and the arrangement of the positive and negative terminals of the lower unit cell 3 are reversed in the horizontal direction shown in FIG. Therefore, strictly speaking, in the assembled battery 1 of the present embodiment, two types of unit cells 3 that differ in the bending direction of the terminals 4 are used. As shown in FIG. 1 (see also FIG. 4), these terminals 4 are aligned with one terminal 4 of another unit cell 3 stacked adjacent in the vertical direction, for example, ultrasonic welding. Etc. are electrically connected. The terminal 4 is made of an aluminum plate material for the positive electrode and a copper plate material for the negative electrode.
枠体２は、樹脂製部材で構成されている。枠体２の内部には、単電池３側面の形状に対応する傾斜部が形成されており、この傾斜部に接着剤を塗布した後、単電池３が挿入されることで、枠体２を介して、多層膜で（外形）形状が変形しやすい単電池３を固定する構造が採られている。 The frame 2 is composed of a resin member. An inclined portion corresponding to the shape of the side surface of the unit cell 3 is formed inside the frame 2, and after applying the adhesive to the inclined unit, the unit cell 3 is inserted, so that the frame unit 2 is Accordingly, a structure in which the unit cell 3 whose outer shape is easily deformed by a multilayer film is fixed is adopted.
枠体２は、単電池３の端子４が位置する箇所に、それぞれ窪み突設部７を有している。窪み突設部７は、高さ方向（図２の上下方向）の上下両側で、枠体２の上下面に対し僅かに低い窪み７ａを形成している。また、図３に示すように、窪み突出部７は、単電池３の端子４を支えるために、枠体２の側面から僅かに突出している。 The frame body 2 has the recessed protrusion part 7 in the location in which the terminal 4 of the cell 3 is located. The depression projecting portions 7 form depressions 7a that are slightly lower than the upper and lower surfaces of the frame body 2 on both the upper and lower sides in the height direction (vertical direction in FIG. 2). In addition, as shown in FIG. 3, the depression protrusion 7 slightly protrudes from the side surface of the frame 2 in order to support the terminal 4 of the unit cell 3.
図４に示すように、組電池１では、同一形状の２つの外枠５が上下方向を逆さまにして用いられている。外枠５は、単電池３の端子４が位置する箇所に僅かに段差を形成した端子部窪み１０を有している。図４及び図５に示すように、外枠５の一側（単電池３の端子４が配置される側）には、略中央部が配線シート６を挿入するためのスリットとして矩形状に切り欠かれた延出部１２が形成されている。外枠５の延出部１２には、図示を省略した四角ナットを収容するためのナット挿入窪み８、ブスバ１３（水平ブスバ１３ａ、垂直ブスバ１３ｂ）を仮固定するためのブスバ用ツメ１１、ブスバ１３と単電池３の端子４とを溶接するための溶接用通し穴９が形成されている。 As shown in FIG. 4, in the assembled battery 1, two outer frames 5 having the same shape are used with the vertical direction turned upside down. The outer frame 5 has a terminal portion recess 10 in which a step is slightly formed at a position where the terminal 4 of the unit cell 3 is located. As shown in FIGS. 4 and 5, on one side of the outer frame 5 (the side where the terminals 4 of the single cells 3 are arranged), the substantially central portion is cut into a rectangular shape as a slit for inserting the wiring sheet 6. A notched extending portion 12 is formed. The extension 12 of the outer frame 5 has a nut insertion recess 8 for accommodating a square nut (not shown), a bus bar claw 11 for temporarily fixing a bus bar 13 (horizontal bus bar 13a, vertical bus bar 13b), and a bus bar. A welding through-hole 9 for welding 13 and the terminal 4 of the unit cell 3 is formed.
図１及び図６に示すように、上側に配置される外枠５のツメ１１には、板状で先端部を僅かに下方にクランクさせた水平ブスバ１３ａの後端部が挿入されている。この状態（ツメ１１に水平ブスバ１３ａの後端部が挿入された状態）で、水平ブスバ１３ａの後端部は、溶接用通り穴９の部分を除き、上方が外枠５の延出部１２で覆われており、水平ブスバ１３ａの先端部は露出した状態で単電池３の端子４が配置された方向と交差する方向（側面方向）に組電池１から突出している。また、上側及び下側に配置された外枠５のツメ１１には、板状で垂直方向に伸び断面コ字状の垂直ブスバ１３ｂの両端部が挿入されている。垂直ブスバ１３ｂが挿入された状態で、垂直ブスバ１３ｂの上方の端面は露出している。なお、水平ブスバ１３ａの先端部側及び垂直ブスバ１３ｂの上方の端部には、ボルト締結用の円形穴が形成されている。 As shown in FIGS. 1 and 6, a rear end portion of a horizontal bus bar 13 a that is plate-like and has a tip portion slightly cranked downward is inserted into the claw 11 of the outer frame 5 disposed on the upper side. In this state (a state in which the rear end portion of the horizontal bus bar 13a is inserted into the claw 11), the rear end portion of the horizontal bus bar 13a excluding the portion of the through hole 9 for welding, and the upper portion is the extended portion 12 of the outer frame 5. The front end of the horizontal bus bar 13a is exposed and protrudes from the assembled battery 1 in a direction (side surface direction) intersecting with the direction in which the terminals 4 of the unit cells 3 are arranged. Further, both ends of a vertical bus bar 13b having a plate shape and a U-shaped cross section are inserted into the tabs 11 of the outer frame 5 arranged on the upper side and the lower side. With the vertical bus bar 13b inserted, the upper end surface of the vertical bus bar 13b is exposed. A circular hole for fastening a bolt is formed at the end of the horizontal bus bar 13a and the upper end of the vertical bus bar 13b.
また、ツメ１１に水平ブスバ１３ａ及び垂直ブスバ１３ｂが挿入された状態で、垂直ブスバ１３ｂの上面（上方の端部の端面）の高さ位置が、水平ブスバ１３ａの先端部の背面の高さ位置と同一ないし僅かに下方の高さ位置となるように、外枠５の延出部１２にツメ１１が形成されている。 Further, in the state where the horizontal bus bar 13a and the vertical bus bar 13b are inserted into the claw 11, the height position of the upper surface (the end surface of the upper end portion) of the vertical bus bar 13b is the height position of the rear surface of the front end portion of the horizontal bus bar 13a. A claw 11 is formed on the extending portion 12 of the outer frame 5 so as to be at the same or slightly lower height position.
図１及び図６に示すように、配線シート６は、単電池３の端子４間の略中央に配置され、金属線を所定のパターンで配設し樹脂シートで固定したもので、一方の端部が夫々単電池３の端子４同士の接続位置に当たる箇所まで延出され電気的に接続されており、他方の端部はコネクタに接続されている。 As shown in FIG. 1 and FIG. 6, the wiring sheet 6 is arranged in the approximate center between the terminals 4 of the unit cell 3, and is formed by arranging metal wires in a predetermined pattern and fixing them with a resin sheet. Each part extends to a position corresponding to a connection position between the terminals 4 of the unit cell 3 and is electrically connected, and the other end is connected to the connector.
図７に示すように、組電池１同士は、一の組電池１の垂直ブスバ１３ｂに対して、隣接する別の組電池１の水平ブスバ１３ａが重なるように配置され、水平ブスバ１３ａの先端部及び垂直ブスバ１３ｂの上方の端部に形成されたボルト締結用の円形穴を介して、上側の外枠５のナット挿入窪み８に予め挿入され図示を省略した四角ナットとの間で、ボルト１４で締結される接続構造を有している。 As shown in FIG. 7, the assembled batteries 1 are arranged so that a horizontal bus bar 13 a of another adjacent assembled battery 1 overlaps a vertical bus bar 13 b of one assembled battery 1, and a front end portion of the horizontal bus bar 13 a. And a bolt 14 that is inserted in advance into the nut insertion recess 8 of the upper outer frame 5 through a circular hole for fastening the bolt formed at the upper end of the vertical bus bar 13b and is not shown. It has the connection structure fastened with.
（組立）
次に、本実施形態の組電池１の組立手順及び組電池１同士の接続手順について説明する。
(assembly)
Next, the assembly procedure of the assembled battery 1 of this embodiment and the connection procedure of the assembled batteries 1 are demonstrated.
まず、図４に示すように、枠体２を介して単電池３を接着固定して積層させる。このとき、外枠５をベースとして、そこに単電池３を積層するようにしてもよい。組立作業性から考えると、この作業の方が安全で簡易であろうと考えられる。次に、外枠５で、枠体２で固定された単電池３を、上下から挟みこむ形で固定する。その後、接触している端子４同士を電気的に接続する。これにより、組電池１を構成する５個の単電池３は、直列接続される。この接続には、リベット等による機械的な接続、スポット溶接やレーザ溶接等の溶融させる溶接等、接続方法はいろいろとありうるが、本実施形態では超音波溶接を用いて端子４間の接続を行った。 First, as shown in FIG. 4, the unit cells 3 are bonded and fixed through the frame 2 and stacked. At this time, the cell 3 may be stacked on the outer frame 5 as a base. From the viewpoint of assembly workability, this work may be safer and easier. Next, the unit cell 3 fixed by the frame body 2 is fixed by the outer frame 5 so as to be sandwiched from above and below. Thereafter, the contacting terminals 4 are electrically connected. Thereby, the five cell 3 which comprises the assembled battery 1 is connected in series. There are various connection methods for this connection, such as mechanical connection using rivets, welding for melting such as spot welding and laser welding, etc., but in this embodiment, connection between the terminals 4 is performed using ultrasonic welding. went.
図６に示すように、外枠５で上下方向から挟み込んだ状態で、配線シート６を上方の外枠５に載せ上述したスリットから押し込んで配置する。このとき、配線シート６のコネクタ部に両面テープを用いて仮固定すると、より作業性が向上する。次いで、この配線シート６の端部と単電池３の端子４（ないし端子同士の接続位置）とを接続する。配線シート６の機能は、各単電池３の電圧検出のみのため、本実施形態ではハンダによる接続を行った。すなわち、単電池３間の接続が超音波溶接で行われているため、更に超音波溶接を行うと切れやクラック発生のおそれがあり、レーザ等で溶融させる方式でも接続箇所を傷めるおそれがあるため、ハンダによる接続が最も簡易で安全であると判断した。 As shown in FIG. 6, with the outer frame 5 sandwiched from above and below, the wiring sheet 6 is placed on the upper outer frame 5 and pushed in from the slits described above. At this time, if the connector portion of the wiring sheet 6 is temporarily fixed using a double-sided tape, the workability is further improved. Next, the end of the wiring sheet 6 is connected to the terminal 4 of the unit cell 3 (or the connection position between the terminals). Since the function of the wiring sheet 6 is only to detect the voltage of each unit cell 3, in this embodiment, the connection is made by solder. That is, since the connection between the single cells 3 is performed by ultrasonic welding, there is a risk of cutting or cracking if ultrasonic welding is further performed, and there is a risk of damaging the connection part even when melted with a laser or the like. The connection by solder was judged to be the simplest and safest.
配線シート６を単電池３間に接続した後、組電池１に水平ブスバ１３ａ、垂直ブスバ１３ｂの夫々を接続する。これらのブスバ１３の接続は、図５に示すツメ１１に横からスライドさせるように挿入する。ここで、垂直ブスバ１３ｂを挿入する前に、上方に配置される外枠５の延出部１２に形成されたナット挿入窪み８に四角ナットを予め挿入しておく。ブスバ１３挿入後、外枠５の延出部１２に形成された通し穴９を介して、ブスバ１３と単電池３の端子４（最低電位側及び最高電位側の端子）とを超音波溶接して電気的に接続する。これら、一連の作業にて組電池１が完成する。 After the wiring sheet 6 is connected between the single cells 3, the horizontal bus bar 13 a and the vertical bus bar 13 b are connected to the assembled battery 1. The connection of these bus bars 13 is inserted into the claw 11 shown in FIG. 5 so as to slide from the side. Here, before inserting the vertical bus bar 13b, a square nut is inserted in advance into the nut insertion recess 8 formed in the extending portion 12 of the outer frame 5 disposed above. After the bus bar 13 is inserted, the bus bar 13 and the terminals 4 (the terminals on the lowest potential side and the highest potential side) of the unit cell 3 are ultrasonically welded through the through holes 9 formed in the extending portion 12 of the outer frame 5. Connect them electrically. The assembled battery 1 is completed by a series of these operations.
次いで、図７に示すように、完成した組電池１同士を接続する。この接続では、一の組電池１の垂直ブスバ１３ｂに対して、隣接する別の組電池１の水平ブスバ１３ａが重なるように配置し、水平ブスバ１３ａの先端部及び垂直ブスバ１３ｂの上方の端部に形成されたボルト締結用の円形穴を介して、上側の外枠５のナット挿入窪み８に予め挿入された四角ナットとの間で、ボルト１４で締結する。 Subsequently, as shown in FIG. 7, the assembled battery 1 completed is connected. In this connection, the horizontal bus bar 13a of another adjacent assembled battery 1 is arranged so as to overlap the vertical bus bar 13b of one assembled battery 1, and the front end portion of the horizontal bus bar 13a and the upper end portion of the vertical bus bar 13b are arranged. The bolt 14 is fastened with a square nut previously inserted into the nut insertion recess 8 of the upper outer frame 5 through the bolt fastening circular hole formed in the above.
（作用等）
次に、本実施形態の組電池１及びその接続構造の作用等について説明する。
(Action etc.)
Next, the operation of the assembled battery 1 and the connection structure thereof according to the present embodiment will be described.
本実施形態の組電池１は、平板状の単電池３が複数個垂直方向に積層されており、水平ブスバ１３ａの先端部は、組電池１の側面から突出している。このため、組電池１から突出した水平ブスバ１３ａを基準とすることで、組電池１の配置・接続がし易く、組み立て作業が容易になる。また、本実施形態の組電池１は、外部出力端子として正極、負極のいずれか一方が側面部から突出しており、他方の極は組電池１の上部で露出している。つまり、組電池１間の接続で、組電池１を配置するときに突設した水平ブスバ１３ａの先端部が、隣接する別の組電池１の露出した垂直ブスバ１３ｂの上面に位置合わせされ、夫々が重なるように設置されている。従って、組電池１の配置によって、外部出力端子（ブスバ１３）間は重なり簡易的な電気的接続が可能となり、接続作業が容易かつ安全となる。 In the assembled battery 1 of the present embodiment, a plurality of flat unit cells 3 are stacked in the vertical direction, and the tip of the horizontal bus bar 13 a protrudes from the side surface of the assembled battery 1. For this reason, by using the horizontal bus bar 13a protruding from the assembled battery 1 as a reference, the assembled battery 1 can be easily arranged and connected, and the assembling work is facilitated. In the assembled battery 1 of the present embodiment, either the positive electrode or the negative electrode protrudes from the side surface portion as an external output terminal, and the other electrode is exposed at the upper part of the assembled battery 1. That is, the tip of the horizontal bus bar 13a protruding when the assembled battery 1 is arranged at the connection between the assembled batteries 1 is aligned with the upper surface of the exposed vertical bus bar 13b of another adjacent assembled battery 1, respectively. Are installed to overlap. Therefore, the arrangement of the assembled battery 1 allows the external output terminals (busbars 13) to be overlapped to enable simple electrical connection, making the connection work easy and safe.
また、本実施形態の組電池１は、組電池１の側面から突出している水平ブスバ１３ａの先端部が、隣接する別の組電池１の垂直ブスバ１３ｂと重なるように位置合わせされるが、この位置合わせのとき、突出した水平ブスバ１３ａの先端部の高さ位置に対して、隣接する別の組電池１の垂直ブスバ１３ｂの高さ位置が同一又は僅かに下方の高さ位置となるように設定されているので、夫々のブスバ１３が抵抗なく重なる構造を有している。従って、組電池１の配置によって、外部出力端子間は必然的に重なって簡易的な電気的接続が可能となり、作業上極めて容易になる。 Moreover, the assembled battery 1 of this embodiment is aligned so that the front end portion of the horizontal bus bar 13a protruding from the side surface of the assembled battery 1 overlaps the vertical bus bar 13b of another adjacent assembled battery 1. At the time of alignment, the height position of the vertical bus bar 13b of another adjacent assembled battery 1 is the same or slightly lower than the height position of the protruding front end portion of the horizontal bus bar 13a. Since it is set, each bus bar 13 has a structure that overlaps without resistance. Therefore, the arrangement of the assembled battery 1 inevitably overlaps between the external output terminals, enabling a simple electrical connection, which is extremely easy in terms of work.
更に、本実施形態の組電池１では、クランク状に屈曲した端子４を有する平板状単電池３を積層させた組電池構造を採用しているが、両極の端子４がクランク状の形状を有していることから、単電池３同士を接続する際に、互いの単電池３から端子４が伸びているため接続距離が短くなると共に、組電池１を構成したときの端子４間の距離が広くとれて、作業空間が大きくなるため、接続作業が容易に行え、且つ、その安全性が向上する。 Furthermore, the assembled battery 1 of the present embodiment employs an assembled battery structure in which the flat unit cells 3 having the terminals 4 bent in a crank shape are stacked. However, the terminals 4 of both electrodes have a crank shape. Therefore, when the cells 3 are connected to each other, the terminals 4 extend from the cells 3, so that the connection distance is shortened, and the distance between the terminals 4 when the assembled battery 1 is configured is Since the work space can be widened, the connection work can be easily performed and the safety thereof is improved.
また、平板状単電池を積層する際、フィルム（樹脂層）で密封された単電池を用いる場合には、その形態は柔く不安定であり、そのような不安定な形態で積層して組電池を構成すると、組電池の固定が困難となる。本実施形態の組電池１では、樹脂層で密閉された単電池１を用いているが、組電池１を構成する単電池３を位置決め保持する枠体２を各単電池３間に配置することで、組電池１を構成する各単電池３の安定した固定状態の確保、ひいては、組電池１自体の安定した固定状態の確保が可能となり、組電池１の組立作業性を向上させることができる。 Also, when laminating flat unit cells, if a unit cell sealed with a film (resin layer) is used, its form is soft and unstable, and such an unstable form is laminated and assembled. When the battery is configured, it is difficult to fix the assembled battery. In the assembled battery 1 of the present embodiment, the unit cell 1 sealed with a resin layer is used. However, the frame body 2 that positions and holds the unit cell 3 constituting the assembled battery 1 is disposed between the unit cells 3. Thus, it is possible to ensure a stable fixed state of each unit cell 3 constituting the assembled battery 1, and thus to ensure a stable fixed state of the assembled battery 1 itself, and to improve the assembly workability of the assembled battery 1. .
更に、フィルムで密閉された単電池を用いる場合には、夫々の単電池は柔く不安定な形態であるため、その寸法精度を求めることは困難であり、また、そのような平板状単電池を積層する場合に、各平板状単電池間の固定部は平面部のみであって、単電池の保持としての機能的には不十分である。本実施形態の組電池１では、枠体２が、単電池３の外周側面の形状に対応した内部形状を有しているため、単電池３を側面からも保持し、単電池３の平面部同士の接触をより確実にした固定が可能となる。このため、本実施形態の組電池１の組立作業では、組電池１の作業前に枠体２に単電池３を挿入する形態となり、単電池３を単独で積層するというよりも枠体２を積み重ねるといった作業に近くなるため、組電池１の組立作業性の向上と、組電池１の寸法精度の向上を図ることができる。 Furthermore, in the case of using a unit cell sealed with a film, each unit cell is in a soft and unstable form, so it is difficult to determine its dimensional accuracy. In the case of stacking, the fixing part between the respective flat unit cells is only a flat part, which is insufficient in terms of the function of holding the unit cell. In the assembled battery 1 of the present embodiment, the frame 2 has an internal shape corresponding to the shape of the outer peripheral side surface of the unit cell 3. Fixing with more reliable contact between each other becomes possible. For this reason, in the assembly work of the assembled battery 1 according to the present embodiment, the single battery 3 is inserted into the frame 2 before the assembled battery 1 is worked. Since it becomes close to the work of stacking, it is possible to improve the assembly workability of the assembled battery 1 and improve the dimensional accuracy of the assembled battery 1.
また、本実施形態の組電池１は、予め外部出力端子（ブスバ１３）が配設可能な外枠５で、積層された単電池３の両端を挟み込む形態を採用している。単電池３自体は不安定な形態であり、それを積層させたときその固定が困難であると同時に外部出力端子への接続も困難である。このため、本実施形態の組電池１では、外枠５を組電池１の外装としても機能させ、水平ブスバ１３ａ、垂直ブスバ１３ｂを延出部１２のツメ１１に挿入して仮固定することで外部出力端子を外枠５と一体とし、単電池３の端子４（最低電位側及び最高電位側の端子）と溶接することで電気的接続及び機械的固定をする構成を採用し、組電池１の組立及び接続作業性の向上を図った。 Moreover, the assembled battery 1 of this embodiment employ | adopts the form which pinches | interposes the both ends of the laminated | stacked cell 3 with the outer frame 5 in which an external output terminal (bus bar 13) can be arrange | positioned previously. The unit cell 3 itself is in an unstable form, and when it is laminated, it is difficult to fix it, and at the same time, connection to an external output terminal is also difficult. For this reason, in the assembled battery 1 of this embodiment, the outer frame 5 is also functioned as the exterior of the assembled battery 1, and the horizontal bus bar 13a and the vertical bus bar 13b are inserted into the claw 11 of the extending portion 12 and temporarily fixed. The battery pack 1 adopts a configuration in which an external output terminal is integrated with the outer frame 5 and is electrically connected and mechanically fixed by welding to a terminal 4 (terminal on the lowest potential side and highest potential side) of the cell 3. Assembling and connecting workability was improved.
更に、本実施形態の組電池１では、組電池１を構成する単電池３の個数を変える場合でも、垂直ブスバ１３ｂの長さと、配線シート６の形状とを変えることによって、その対応を図ることができるため、組電池１の構成単電池数を変化させる場合に特に有効な構造と云うことができる。また、高性能２次電池であるリチウム電池は、各単電池の電圧を全て測定する必要から配線作業が煩雑で、単電池を接続している全接続ブスバが露出し、密集している状態では、作業が危険でもあり効率が悪いといった問題点があったが、本実施形態の組電池１のように、枠体２を用いて単電池３の端子４を支持し、配線シート６にて接続することによって、組立作業の簡素化のみならず、作業時の安全性を確保することができる。 Furthermore, in the assembled battery 1 of the present embodiment, even when the number of unit cells 3 constituting the assembled battery 1 is changed, the correspondence can be achieved by changing the length of the vertical bus bar 13b and the shape of the wiring sheet 6. Therefore, it can be said that the structure is particularly effective when the number of constituent cells of the assembled battery 1 is changed. In addition, the lithium battery, which is a high-performance secondary battery, is complicated in wiring work because it is necessary to measure all the voltage of each unit cell. In a state where all connected bus bars connecting the unit cells are exposed and dense. There is a problem that the work is dangerous and the efficiency is low. However, like the assembled battery 1 of this embodiment, the terminal 4 of the unit cell 3 is supported using the frame 2 and connected by the wiring sheet 6. By doing so, not only simplification of assembly work but also safety during work can be secured.
また更に、本実施形態の組電池１では、窪み突設部７が、高さ方向の上下両側で、枠体２の面に対し僅かに低い窪み７ａを形成している。このため、端子４で多層膜の溶着部に形成された盛り上がり箇所による枠体２と単電池３とのガタツキを避けることができる（端子部窪み１０も同じ。）。また、窪み突出部７は、枠体２の側面から僅かに突出しているため、単電池３の端子４を支え、その遊動を防ぐことができる。更に、枠体２を使うことで、樹脂層で密閉された柔く不安定な単電池を固定することが容易となり、且つ、機械化する際チャックし易く、位置決めが容易となり、その作業性が向上する。また、電気的な接続を行う際、同一方向に同極端子が配置されている場合に、直列接続するときには、絶縁物で挟み込んだ金属板を斜め方向に配置する必要があり、作業が極めて困難であったが、本実施形態の組電池１では、単電池３の端子４をクランクさせ、それを枠体２の窪み突設部７で支持することで、端子４への負荷を減らす（端子４の金属疲労を減少させる）ことができる。 Furthermore, in the assembled battery 1 according to the present embodiment, the depression projecting portions 7 form depressions 7a that are slightly lower than the surface of the frame 2 on both the upper and lower sides in the height direction. For this reason, it is possible to avoid rattling between the frame body 2 and the unit cell 3 due to the swelled portion formed in the welded portion of the multilayer film at the terminal 4 (the same applies to the terminal portion recess 10). Moreover, since the hollow protrusion part 7 protrudes slightly from the side surface of the frame 2, it can support the terminal 4 of the cell 3 and can prevent the looseness. Furthermore, by using the frame body 2, it becomes easy to fix a soft and unstable unit cell sealed with a resin layer, and it is easy to chuck when mechanized, positioning becomes easy, and its workability is improved. To do. Also, when making the electrical connection, if the same polarity terminals are arranged in the same direction, when connecting in series, it is necessary to arrange the metal plate sandwiched between the insulators in an oblique direction, which is extremely difficult to work. However, in the assembled battery 1 of the present embodiment, the terminal 4 of the unit cell 3 is cranked and supported by the recessed projecting portion 7 of the frame 2 to reduce the load on the terminal 4 (terminals). 4 metal fatigue can be reduced).
また、本実施形態の組電池１では、露出した垂直ブスバ１３ｂの上面及び水平ブスバ１３ａの先端部を外枠５の上面より下方に設定することによって、組電池１が完成した段階で、例えば、スパナ等の金属工具や金属材料を上方から落下させた場合でも、短絡などの被害を最小限に抑えることができる。更に、本実施形態の組電池１の接続構造では、図示を省略した四角ナットを挿入するナット挿入窪み８を外枠５の上面よりも下方に設定すると共に、ボルト締結後のボルト１４の頭が外枠５よりも下方に設定しているので、複数の組電池１を接続した状態でも、金属工具や金属材料を上方から落下させた場合の短絡などの被害を最小限に抑えることができる。 Moreover, in the assembled battery 1 of this embodiment, by setting the exposed upper surface of the vertical bus bar 13b and the tip of the horizontal bus bar 13a below the upper surface of the outer frame 5, when the assembled battery 1 is completed, for example, Even when a metal tool such as a spanner or a metal material is dropped from above, damage such as a short circuit can be minimized. Furthermore, in the connection structure of the assembled battery 1 of the present embodiment, the nut insertion recess 8 for inserting a square nut (not shown) is set below the upper surface of the outer frame 5 and the head of the bolt 14 after the bolt is fastened. Since it is set below the outer frame 5, even when a plurality of assembled batteries 1 are connected, damage such as a short circuit when a metal tool or metal material is dropped from above can be minimized.
なお、本実施形態では、単電池３を直列接続した組電池１を例示したが、本発明はこれに限らず、単電池３を並列接続ないし直並列接続して組電池１を構成するようにしてもよい。また、組電池１の接続構造においても、直列接続に限らず、並列接続をするようにしてもよい。また、本実施形態では、延出部１２の端部にツメ１１を対で形成した例を示したが、ツメ１１を成形性の問題からアーチ型にしたり、複数個の対を形成しても同様の仮固定の効果が得られる。 In the present embodiment, the assembled battery 1 in which the cells 3 are connected in series is illustrated, but the present invention is not limited to this, and the assembled battery 1 is configured by connecting the cells 3 in parallel or in series-parallel. May be. Moreover, also in the connection structure of the assembled battery 1, you may make it connect not only in series connection but in parallel. Further, in the present embodiment, an example in which the claws 11 are formed in pairs at the end portion of the extending portion 12 has been shown. The same temporary fixing effect can be obtained.
本発明は、効率的に組み立てることでき、かつ、安全に配線作業を行うことができる組電池及び組電池間の接続構造に係り、組電池の製造、販売に寄与するため、産業上の利用可能性を有する。 The present invention relates to an assembled battery that can be efficiently assembled and can be safely wired, and a connection structure between the assembled batteries, and contributes to the manufacture and sale of the assembled battery. Have sex.
１ 組電池
２ 枠体
３ 単電池
４ 端子
５ 外枠
６ 配線シート
７ 窪み突設部
８ ナット挿入窪み
９ 溶接用通し穴
１０ 端子部窪み
１１ ブスバ用ツメ
１２ 延出部
１３ａ 水平ブスバ（外部出力端子の一部）
１３ｂ 垂直ブスバ（外部出力端子の一部）
１４ ボルト
DESCRIPTION OF SYMBOLS 1 assembled battery 2 frame 3 unit cell 4 terminal 5 outer frame 6 wiring sheet 7 hollow projection part 8 nut insertion hollow 9 welding through hole 10 terminal part hollow 11 bus bar claw 12 extension part 13a horizontal bus bar (external output terminal) Part of
13b Vertical bus bar (part of external output terminal)
14 volts
Claims (7)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004026224A JP4400235B2 (en) | 2004-02-03 | 2004-02-03 | Connection structure between batteries |
| JP2009000022A JP2009105058A (en) | 2004-02-03 | 2009-01-05 | Battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004026224A JP4400235B2 (en) | 2004-02-03 | 2004-02-03 | Connection structure between batteries |
| JP2009000022A JP2009105058A (en) | 2004-02-03 | 2009-01-05 | Battery pack |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2009000022A Division JP2009105058A (en) | 2004-02-03 | 2009-01-05 | Battery pack |
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| Publication Number | Publication Date |
|---|---|
| JP2005222703A true JP2005222703A (en) | 2005-08-18 |
| JP4400235B2 JP4400235B2 (en) | 2010-01-20 |
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| JP2004026224A Expired - Fee Related JP4400235B2 (en) | 2004-02-03 | 2004-02-03 | Connection structure between batteries |
| JP2009000022A Pending JP2009105058A (en) | 2004-02-03 | 2009-01-05 | Battery pack |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2009000022A Pending JP2009105058A (en) | 2004-02-03 | 2009-01-05 | Battery pack |
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| JP (2) | JP4400235B2 (en) |
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|---|---|
| JP2009105058A (en) | 2009-05-14 |
| JP4400235B2 (en) | 2010-01-20 |
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