JP5824612B2 - Battery module - Google Patents
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- JP5824612B2 JP5824612B2 JP2011166286A JP2011166286A JP5824612B2 JP 5824612 B2 JP5824612 B2 JP 5824612B2 JP 2011166286 A JP2011166286 A JP 2011166286A JP 2011166286 A JP2011166286 A JP 2011166286A JP 5824612 B2 JP5824612 B2 JP 5824612B2
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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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Description
本発明は、複数の素電池を含む組電池同士を電気接続した電池モジュールに関するものである。 The present invention relates to a battery module in which assembled batteries including a plurality of unit cells are electrically connected to each other.
大容量の電池モジュールを得るために、複数の素電池を収容する電池ユニット（組電池）を複数電気接続して、大容量の電池モジュールとすることがある（特許文献１を参照）。特許文献１は、各電池ユニットにリード板を設けて、リード板を介して電池ユニット同士を電気接続している。 In order to obtain a large-capacity battery module, a plurality of battery units (assembled batteries) that accommodate a plurality of unit cells may be electrically connected to form a large-capacity battery module (see Patent Document 1). In Patent Document 1, each battery unit is provided with a lead plate, and the battery units are electrically connected to each other via the lead plate.
近年、電池モジュールの大容量化とともに、その容積を低減すること、つまり、エネルギー密度の高い電池モジュールが求められている。しかし一方で、電池モジュールを構成する電池ユニット（組電池）の電気接続作業が簡便であることも求められている。 In recent years, there has been a demand for a battery module having a high energy density as the capacity of the battery module is increased and its volume is reduced. However, on the other hand, it is also required that the electrical connection work of the battery unit (assembled battery) constituting the battery module is simple.
そこで本発明は、電池ユニット（組電池）の電気接続部の容積を低減して電池モジュールのエネルギー密度を高めること、および組電池同士の電気接続を容易に行えるようにすることを目的とする。 Therefore, an object of the present invention is to increase the energy density of a battery module by reducing the volume of an electrical connection portion of a battery unit (assembled battery) and to easily perform electrical connection between assembled batteries.
前記従来の課題を解決するために、本発明の電池モジュールは、複数の素電池を配列した第１の組電池と、複数の素電池を配列した第２の組電池と、第１の組電池の集電板と第２の組電池の集電板とを電気接続するバスバーを備え、第１の組電池及び第２の組電池は、複数の素電池が配置されて、端部に素電池同士の隙間を有し、バスバーが、第１の組電池の隙間および第２の組電池の隙間の少なくとも一方に配置されている。 In order to solve the conventional problems, a battery module of the present invention includes a first assembled battery in which a plurality of unit cells are arranged, a second assembled battery in which a plurality of unit cells are arranged, and a first assembled battery. The current collector plate and the current collector plate of the second assembled battery are electrically connected to each other, and the first assembled battery and the second assembled battery are each provided with a plurality of unit cells, and the unit cell at the end. There is a gap between each other, and the bus bar is disposed in at least one of the gap between the first assembled battery and the gap between the second assembled battery.
本構成によって、組電池同士の電気接続部がコンパクトであるので、電池モジュールのエネルギー密度が高まる。 With this configuration, since the electrical connection portion between the assembled batteries is compact, the energy density of the battery module is increased.
本発明の電池モジュールは、複数の素電池を有する組電池の複数を電気接続することで、大容量化されている。しかも、組電池同士の電気接続部がコンパクトであるので、電池モジュールのエネルギー密度が高まる。よって、大容量化とともに、エネルギー密度の向上が望まれる用途の電池モジュールに用いられうる。 The battery module of the present invention has a large capacity by electrically connecting a plurality of assembled batteries having a plurality of unit cells. And since the electrical connection part of assembled batteries is compact, the energy density of a battery module increases. Therefore, it can be used for a battery module for applications where an increase in capacity and an improvement in energy density are desired.
本発明の電池モジュールは、２以上の組電池を含み、組電池同士が電気接続されている。組電池同士の電気接続は、直列接続であっても、並列接続であってもよい。組電池同士の電気接続を、バスバーを介して行うことを特徴とする。 The battery module of the present invention includes two or more assembled batteries, and the assembled batteries are electrically connected to each other. The electrical connection between the assembled batteries may be a series connection or a parallel connection. The battery pack is electrically connected through a bus bar.
組電池において、各素電池は最密充填配列されていることが好ましい。具体的には、複数の円柱状の素電池が配列され、各素電池の柱頂部に配置された集電板と、素電池の柱底部に配置された集電板と、を有する。 In the assembled battery, each unit cell is preferably arranged in a close-packed arrangement. Specifically, a plurality of cylindrical unit cells are arranged, and each has a current collector plate arranged at the top of each unit cell and a current collector plate arranged at the column bottom of the unit cell.
以下本発明を実施するための形態について、図面を参照しながら説明する。
（実施の形態１）
まず、本発明の電池モジュールを構成する組電池について説明する。
Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
(Embodiment 1)
First, the assembled battery which comprises the battery module of this invention is demonstrated.
図１は、本発明の実施の形態１における電池モジュールを構成する組電池の斜視図である。図１に示されるように、組電池１００は、正極集電板１０と、正極側ホルダー２０と、複数の素電池３１を収納するハウジング３０、または、複数の素電池３１の集合体と、負極側ホルダー４０と、負極集電板５０とを有し、正極集電板１０または負極集電板５０に他の組電池１００の正極集電板１０または負極集電板５０を電気的に接続するバスバー６０が接続されている。 FIG. 1 is a perspective view of an assembled battery constituting the battery module according to Embodiment 1 of the present invention. As shown in FIG. 1, the assembled battery 100 includes a positive electrode current collector plate 10, a positive electrode side holder 20, a housing 30 that houses a plurality of unit cells 31, or an assembly of a plurality of unit cells 31, and a negative electrode A side holder 40 and a negative electrode current collector plate 50 are provided, and the positive electrode current collector plate 10 or the negative electrode current collector plate 50 of another assembled battery 100 is electrically connected to the positive electrode current collector plate 10 or the negative electrode current collector plate 50. A bus bar 60 is connected.
素電池３１は、円柱状のリチウムイオン電池などの二次電池で、柱頂部に正極、柱底部に負極を有するものである。 The unit cell 31 is a secondary battery such as a cylindrical lithium ion battery, and has a positive electrode at the column top and a negative electrode at the column bottom.
素電池３１の各々は、ハウジング３０などに収容されてもよいし、ハウジング３０に収容されない素電池３１の単なる集合体であってもよく、これらは正極側ホルダー２０および負極側ホルダー４０で支持される。また、素電池３１は最密充填構造で配置されている。つまり、３つの素電池３１が正三角形の頂点になるように、６０°の角度で配置されている。図１においては、例えば組電池１００の中に素電池３１が７個（ｎ個）、６個（ｎ−１個）、７個（ｎ個）と３列以上で配置され、最密充填構造で配置されている。このとき、６個の列（ｎ−１個の列）において、組電池１００の端部に素電池３１の半分のサイズの隙間が形成されている。 Each of the unit cells 31 may be accommodated in the housing 30 or the like, or may be a simple assembly of the unit cells 31 not accommodated in the housing 30, and these are supported by the positive electrode side holder 20 and the negative electrode side holder 40. The The unit cells 31 are arranged in a close-packed structure. That is, the three unit cells 31 are arranged at an angle of 60 ° so as to be the vertices of an equilateral triangle. In FIG. 1, for example, seven (n), six (n-1), seven (n) unit cells 31 are arranged in three or more rows in the assembled battery 100, and the closest packed structure. Is arranged in. At this time, in six columns (n−1 columns), a gap having a size half that of the unit cell 31 is formed at the end of the assembled battery 100.
また、ハウジング３０は、例えば、図１のように各素電池を収容可能なパイプ状部材の集合体、各素電池を収容可能な孔を設けたブロックなどでありうる。ハウジング３０は、銅、鉄、ニッケル、アルミニウなどの金属や樹脂で形成される。金属の場合は、鋳物や、切削加工物などであり任意の形状を作ることができる工法で形成されたものである。そして、金属で形成した場合は、素電池３１が発生した熱をハウジング３０が吸熱し、放熱することができる。 Further, the housing 30 can be, for example, an assembly of pipe-shaped members capable of accommodating each unit cell as shown in FIG. 1 or a block provided with a hole capable of accommodating each unit cell. The housing 30 is made of a metal such as copper, iron, nickel, or aluminum, or a resin. In the case of a metal, it is a casting, a cut product, or the like, which is formed by a method capable of making an arbitrary shape. And when it forms with a metal, the housing 30 can absorb the heat which the unit cell 31 generate | occur | produced, and can thermally radiate.
正極集電板１０は、複数の素電池３１の正極に接続されて組電池１００の正極となる。また、負極集電板５０は、複数の素電池３１の負極に接続されて組電池１００の負極となる。正極集電板１０及び負極集電板５０は、金属導体で、銅、鉄、ニッケル、アルミニウム、またはそれらの合金が含まれ、バスバー６０は、それらの金属単体やそれらを含む複層の合板で構成される。また、正極集電板１０及び負極集電板５０は、金属導体にめっきなどの皮膜形成なされたものでもかまわない。 The positive electrode current collector plate 10 is connected to the positive electrodes of the plurality of unit cells 31 and becomes the positive electrode of the assembled battery 100. Further, the negative electrode current collector plate 50 is connected to the negative electrodes of the plurality of unit cells 31 to become the negative electrode of the assembled battery 100. The positive electrode current collector plate 10 and the negative electrode current collector plate 50 are metal conductors and include copper, iron, nickel, aluminum, or an alloy thereof, and the bus bar 60 is a single metal or a multilayer plywood including them. Composed. Further, the positive electrode current collector plate 10 and the negative electrode current collector plate 50 may be formed by forming a film such as plating on a metal conductor.
正極側ホルダー２０は、正極集電板１０と複数の素電池３１の間に配置され、正極集電板１０と複数の素電池３１の側面を絶縁すると共に、正極集電板１０と複数の素電池３１とを固定している。また、負極側ホルダー４０は、負極集電板５０と複数の素電池３１の間に配置され、負極集電板５０と複数の素電池３１の側面を絶縁すると共に、負極集電板５０と複数の素電池３１とを固定している。正極側ホルダー２０及び負極側ホルダー４０は、樹脂または表面を絶縁コーティングされた金属などで構成されている。 The positive electrode side holder 20 is disposed between the positive electrode current collector plate 10 and the plurality of unit cells 31 and insulates the side surfaces of the positive electrode current collector plate 10 and the plurality of unit cells 31, and the positive electrode current collector plate 10 and the plurality of unit cells 31. The battery 31 is fixed. The negative electrode side holder 40 is disposed between the negative electrode current collector plate 50 and the plurality of unit cells 31, and insulates the side surfaces of the negative electrode current collector plate 50 and the plurality of unit cells 31. The unit cell 31 is fixed. The positive electrode side holder 20 and the negative electrode side holder 40 are made of resin or metal whose surface is insulated.
バスバー６０は、正極集電板１０には接続させるが、一方で、同じ組電池の負極集電板５０には接続させない。同様に、負極集電板５０に接続させるとき、同じ組電池の正極集電板１０には接続させない。バスバー６０は、正極集電板１０に一体不可分に接続させていてもよいし、着脱可能に接続させていてもよい。例えば、正極集電板１０にバスバー６０を冶金的に接合させれば、通常は一体不可分になり、正極集電板１０にバスバー６０をねじで固定させれば、脱着可能に接続される。また、バスバー６０は組電池１００の素電池３１が１個少ない６個の列（ｎ−１個の列）の隙間に配置される。 The bus bar 60 is connected to the positive electrode current collector plate 10 but is not connected to the negative electrode current collector plate 50 of the same assembled battery. Similarly, when connecting to the negative electrode current collector plate 50, it is not connected to the positive electrode current collector plate 10 of the same assembled battery. The bus bar 60 may be inseparably connected to the positive electrode current collector plate 10 or may be detachably connected. For example, if the bus bar 60 is metallurgically bonded to the positive electrode current collector plate 10, it is usually inseparable, and if the bus bar 60 is fixed to the positive electrode current collector plate 10 with screws, the connection is detachable. In addition, the bus bar 60 is disposed in a gap between six rows (n−1 rows) in which the unit cell 31 of the assembled battery 100 is one less.
バスバー６０は、組電池１００の端部に形成される隙間に収まるサイズで、一つの素電池３１を包含するハウジング３０のサイズ、または素電池３１のサイズと同等または若干小さいサイズで、かつ、正六角形状であることが好ましい。正六角形状のコーナー角はＲ状になっていてもよいし、接合される組電池１００側の方だけを六角にしてもよい。この場合は、組電池１００の端面から隙間に対して６０°の角度で挿入される形状、つまり、ハウジング３０または素電池３１に接しながら、組電池１００の端面に対して６０°の角度をもった線の組合せのみとなり、接合されない組電池側では六角でなく円形状であったり、多角形であったりしてもかまわない。但し、複数配列される素電池の隙間に入ることが前提の形状である。 The bus bar 60 is a size that fits in a gap formed at the end of the assembled battery 100, is the size of the housing 30 that includes one unit cell 31, or a size that is equal to or slightly smaller than the size of the unit cell 31, and is A hexagonal shape is preferred. The corner angle of the regular hexagon may be R-shaped, or only the side of the assembled battery 100 to be joined may be hexagonal. In this case, the shape is inserted from the end face of the assembled battery 100 at an angle of 60 ° with respect to the gap, that is, has an angle of 60 ° with respect to the end face of the assembled battery 100 while contacting the housing 30 or the unit cell 31. However, on the assembled battery side that is not joined, it may be a circle or a polygon instead of a hexagon. However, the shape is based on the premise of entering a gap between a plurality of unit cells arranged.
上記のように、バスバー６０を組電池１００の端面から隙間に対して６０°の角度で挿入される形状、つまり、正六角形状、または、ハウジング３０または素電池３１に接しながら、組電池１００の端面に対して６０°の角度をもった線の組合せの形状にすることにより、素電池３１の６０°で形成されて最密充填構造に挿入する際に、一つの素電池３１を包含するハウジング３０または素電池３１の円形と同等の断面積で電気的接続ができると共に、バスバー６０の外周面に最も長い直線部を有することができるので、バスバー６０と正極集電板１０または負極集電板５０との接合面積を増やすことができ、かつ、接合強度を強くすることができる。 As described above, the bus bar 60 is inserted from the end face of the assembled battery 100 at an angle of 60 ° with respect to the gap, that is, a regular hexagonal shape, or while contacting the housing 30 or the unit cell 31, A housing including one unit cell 31 when the unit cell 31 is formed at 60 ° and inserted into a close-packed structure by forming a combination of lines having an angle of 60 ° with respect to the end face. 30 or the cross-sectional area equivalent to the circular shape of the unit cell 31 can be electrically connected, and the outermost surface of the bus bar 60 can have the longest straight line portion. Therefore, the bus bar 60 and the positive current collector plate 10 or the negative current collector plate 50 and the bonding area can be increased.
また、バスバー６０は、組電池１００の集電板同士を電気接続させる導体部材であればよく、柔軟な配線部材であってもよいし、剛直な金属棒であってもよい。組電池１００同士の接続作業を容易にするという視点から、剛直な金属棒とする場合もある。金属の例には、銅、鉄，ニッケル，アルミニウム、またはそれらの合金が含まれ、バスバー６０は、それらの金属を含む複層の合板であってもよい。また、バスバー６０は、金属導体にめっきなどの皮膜形成なされたものでもかまわない。 The bus bar 60 may be a conductor member that electrically connects the current collector plates of the assembled battery 100, and may be a flexible wiring member or a rigid metal rod. From the viewpoint of facilitating the connection work between the assembled batteries 100, a rigid metal rod may be used. Examples of the metal include copper, iron, nickel, aluminum, or an alloy thereof, and the bus bar 60 may be a multilayer plywood including these metals. The bus bar 60 may be formed by forming a film such as plating on a metal conductor.
正極集電板１０、負極集電板５０は、端部に素電池３１が１個少ないｎ−１個の列の隙間の位置にバスバー６０の正六角形状を対称の頂点で半分にした台形と同じサイズの凹部を有している。これにより、バスバー６０と正極集電板１０または負極集電板５０を溶接する際、より長い直線で溶接することができる。正極集電板１０、負極集電板５０の台形状の凹部には、正極集電板１０、負極集電板５０に対して直角方向に飛出た溶接部を備えていてもよい。この飛び出しは折り曲げ加工や段付き切削加工、鍛造プレス加工などであってもよい。 The positive electrode current collector plate 10 and the negative electrode current collector plate 50 have trapezoidal shapes in which the regular hexagonal shape of the bus bar 60 is halved at the symmetric vertex at the position of the gap of n-1 rows where one unit cell 31 is less at the end. It has a recess of the same size. Thereby, when welding the bus bar 60 and the positive electrode current collector plate 10 or the negative electrode current collector plate 50, it is possible to perform welding with a longer straight line. The trapezoidal concave portions of the positive electrode current collector plate 10 and the negative electrode current collector plate 50 may be provided with welded portions protruding in a direction perpendicular to the positive electrode current collector plate 10 and the negative electrode current collector plate 50. This protrusion may be a bending process, a stepped cutting process, a forging press process, or the like.
次に、本発明の電池モジュールについて説明する。 Next, the battery module of the present invention will be described.
図２は、本発明の実施の形態１における電池モジュールの平面図および正面図である。 FIG. 2 is a plan view and a front view of the battery module according to Embodiment 1 of the present invention.
電池モジュール２００は複数個の組電池１００を組合せて構成される。図２では、電池モジュール２００の組合せの例として、２個の組電池１００ａ、１００ｂの組合せを説明する。組電池１００ａの構成部品を、正極集電板１０ａ、正極側ホルダー２０ａ、ハウジング３０ａ、素電池３１ａ、負極側ホルダー４０ａ、負極集電板５０ａと現し、組電池１００ｂの構成部品を、正極集電板１０ｂ、正極側ホルダー２０ｂ、ハウジング３０ｂ、素電池３１ｂ、負極側ホルダー４０ｂ、負極集電板５０ｂと表す。 The battery module 200 is configured by combining a plurality of assembled batteries 100. In FIG. 2, a combination of two assembled batteries 100a and 100b will be described as an example of a combination of battery modules 200. The component parts of the assembled battery 100a are represented as the positive electrode current collector plate 10a, the positive electrode side holder 20a, the housing 30a, the unit cell 31a, the negative electrode side holder 40a, and the negative electrode current collector plate 50a. The plate 10b, the positive electrode side holder 20b, the housing 30b, the unit cell 31b, the negative electrode side holder 40b, and the negative electrode current collector plate 50b are represented.
図２（ａ）の平面図に示されるように、組電池１００ａのハウジング３０ａと組電池１００ｂのハウジング３０ｂの間に、バスバー６０が挟まれて配置されている。そして、図２（ｂ）の正面図に示されるように、バスバー６０の一部は、ハウジング３０ａ、３０ｂの隙間に入り込んでいる。このように、バスバー６０の軸方向と、ハウジング３０ａ、３０ｂで示される素電池３１の軸方向とは平行していることが好ましい。 As shown in the plan view of FIG. 2A, a bus bar 60 is disposed between the housing 30a of the assembled battery 100a and the housing 30b of the assembled battery 100b. As shown in the front view of FIG. 2B, a part of the bus bar 60 enters the gap between the housings 30a and 30b. Thus, it is preferable that the axial direction of the bus bar 60 and the axial direction of the unit cell 31 indicated by the housings 30a and 30b are parallel to each other.
図２（ｂ）の正面図に示されるように、バスバー６０の一端は組電池１００ａの正極集電板１０ａに接合している。一方、バスバー６０の他端は、組電池１００ａの負極集電板５０ａに接合しておらず、他の部材に接合することができる。図２（ｂ）の正面図においては組電池１００ｂの負極集電板５０ｂに接合されている。バスバー６０の正極集電板１０ａ、５０ｂへの接合は、ネジ止めやかしめなどによる機械的接合、またはＴＩＧ溶接、レーザー溶接などによる冶金的接合がなされる。溶接を行う際、バスバー６０と正極集電板１０または負極集電板５０が正六角形の長い直線で接合できるので、溶接面積を増やすことができ、かつ、溶接強度を強くすることができる。 As shown in the front view of FIG. 2B, one end of the bus bar 60 is joined to the positive electrode current collector plate 10a of the assembled battery 100a. On the other hand, the other end of the bus bar 60 is not joined to the negative electrode current collector plate 50a of the assembled battery 100a, but can be joined to another member. In the front view of FIG.2 (b), it joins to the negative electrode current collecting plate 50b of the assembled battery 100b. The bus bar 60 is joined to the positive electrode current collector plates 10a and 50b by mechanical joining by screwing or caulking, or metallurgical joining by TIG welding or laser welding. When welding is performed, the bus bar 60 and the positive electrode current collector plate 10 or the negative electrode current collector plate 50 can be joined by a long regular hexagonal straight line, so that the welding area can be increased and the welding strength can be increased.
また、図２に示されるように、組電池１００ａの負極集電板５０ａは、バスバー６０が配置される位置の反対側に、接続部位５１ａを有している。接続部位５１ａは、更なる他の組電池１００に接続されたバスバー６０が接合したり、外部との接続が可能な接続端子を接合したりする。 As shown in FIG. 2, the negative electrode current collector plate 50a of the assembled battery 100a has a connection part 51a on the opposite side of the position where the bus bar 60 is disposed. The connection part 51a joins the bus bar 60 connected to the further other assembled battery 100, or joins a connection terminal that can be connected to the outside.
図３に本発明の実施の形態１における接続端子の斜視図を示す。外部との接続可能な接続端子とは、例えば、図３（ａ）のような板形状であってもよいし、図３（ｂ）のような受け止め形状であってもよい。この外部との接続可能な部品は、組電池１００の幅、長さより飛び出してもかまわないし、組電池１００との接合代以外は多角形や円形など形状にこだわらない。ただし、バスバー６０と同様に、正極集電板１０または負極集電板５０の台形状の凹部に溶接するために、正六角形状を対称の頂点で半分にした台形、または、ハウジング３０または素電池３１に接しながら、組電池１００の端面に対して６０°の角度をもった線の組合せの形状の溶接部７１が必要である。また、平板部に接続部７２を備えている。図３では、接続部７２を孔としているが、ネジなどの突起物としてもよい。 FIG. 3 shows a perspective view of the connection terminal according to Embodiment 1 of the present invention. The connection terminal that can be connected to the outside may be, for example, a plate shape as shown in FIG. 3A or a receiving shape as shown in FIG. The parts that can be connected to the outside may protrude from the width and length of the assembled battery 100, and other than the joining allowance with the assembled battery 100, it does not stick to a shape such as a polygon or a circle. However, in the same manner as the bus bar 60, a trapezoid in which a regular hexagonal shape is halved at a symmetric apex, or a housing 30 or a unit cell, for welding to the trapezoidal concave portion of the positive electrode current collector plate 10 or the negative electrode current collector plate 50. A welded portion 71 in the shape of a combination of lines having an angle of 60 ° with respect to the end face of the assembled battery 100 is required while in contact with 31. Moreover, the connection part 72 is provided in the flat plate part. In FIG. 3, the connecting portion 72 is a hole, but may be a protrusion such as a screw.
図４に本発明の実施の形態１における接続端子を接続した組電池の斜視図を示す。図１のバスバー６０の代わりに接続端子７０が、溶接部７１で正極集電板１０に接続されている。そして、接続部７２にリード線などを接続して、電池モジュール２００の外部に電池モジュール２００の電流を放電する。 FIG. 4 shows a perspective view of the assembled battery to which the connection terminals in Embodiment 1 of the present invention are connected. Instead of the bus bar 60 of FIG. 1, a connection terminal 70 is connected to the positive electrode current collector plate 10 by a welding portion 71. And a lead wire etc. are connected to the connection part 72, and the electric current of the battery module 200 is discharged to the exterior of the battery module 200.
また、図５に本発明の実施の形態１における接続端子で組電池同士を並列接続した斜視図を示す。図５に示すように、組電池１００ａの正極集電板１０ａおよび組電池１００ｂの正極集電板１０ｂに接続端子７０ａおよび接続端子７０ｂを接続し、接続端子７０ａの接続部７２ａと接続端子７０ｂの接続部７２ｂを接続板で接続することで、組電池１００ａと組電池１００ｂを並列接続することができる。 Further, FIG. 5 shows a perspective view in which the assembled batteries are connected in parallel by the connection terminals in the first embodiment of the present invention. As shown in FIG. 5, the connection terminal 70a and the connection terminal 70b are connected to the positive electrode current collector plate 10a of the assembled battery 100a and the positive electrode current collector plate 10b of the assembled battery 100b, and the connection portions 72a and 70b of the connection terminal 70a are connected. The assembled battery 100a and the assembled battery 100b can be connected in parallel by connecting the connecting portion 72b with a connection plate.
また、図６に本発明の実施の形態１における接続端子で組電池同士を直列接続した斜視図を示す。図６に示すように、組電池１００ａの正極集電板１０ａおよび組電池１００ｂの負極集電板５０ｂに接続端子７０ａおよび接続端子７０ｂを接続し、接続端子７０ａの接続部７２ａと接続端子７０ｂの接続部７２ｂを接続板で接続することで、組電池１００ａと組電池１００ｂを直列接続することができる。 Further, FIG. 6 shows a perspective view in which the assembled batteries are connected in series at the connection terminal according to Embodiment 1 of the present invention. As shown in FIG. 6, the connection terminal 70a and the connection terminal 70b are connected to the positive electrode current collector plate 10a of the assembled battery 100a and the negative electrode current collector plate 50b of the assembled battery 100b, and the connection portions 72a and 70b of the connection terminal 70a are connected. The battery pack 100a and the battery pack 100b can be connected in series by connecting the connecting portion 72b with a connection plate.
最後に、本発明の素電池の配列とバスバーの配置について説明する。 Finally, the arrangement of the unit cells and the arrangement of the bus bars of the present invention will be described.
図７に、本発明の実施の形態１における素電池の配列と、バスバーの配置の関係図を示す。 FIG. 7 shows a relationship diagram between the arrangement of the unit cells and the arrangement of the bus bars in the first embodiment of the present invention.
組電池１００における素電池３１は、同一平面に配列されていることが好ましい。その配列は特に限定されないが、配列された素電池同士の隙間が設けられる必要がある。素電池は、例えば、図７に示されるように、最密充填配列されていることが好ましい。 The unit cells 31 in the assembled battery 100 are preferably arranged in the same plane. Although the arrangement is not particularly limited, it is necessary to provide a gap between the arranged unit cells. For example, the unit cells are preferably arranged in a close-packed arrangement as shown in FIG.
図７に示されるように、素電池３１が６０°の角度で正三角形に配置されるように最密充填配列されている場合には、素電池３１同士の隙間の位置６１に、点線６２を中心としてバスバー６０を配置すればよい。このようにバスバー６０を配置することで、バスバー６０の一部が、組電池１００同士の隙間に配置される。このとき、バスバー６０を組電池１００の端面から隙間に対して６０°の角度で挿入される形状、つまり、正六角形状、または、ハウジング３０または素電池３１に接しながら、組電池１００の端面に対して６０°の角度をもった線の組合せの形状にしている。 As shown in FIG. 7, when the unit cells 31 are arranged in a close-packed arrangement so as to be arranged in an equilateral triangle at an angle of 60 °, a dotted line 62 is placed at the position 61 of the gap between the unit cells 31. The bus bar 60 may be disposed as the center. By arranging the bus bar 60 in this way, a part of the bus bar 60 is arranged in the gap between the assembled batteries 100. At this time, a shape in which the bus bar 60 is inserted from the end surface of the assembled battery 100 at an angle of 60 ° with respect to the gap, that is, a regular hexagonal shape, or the end surface of the assembled battery 100 while contacting the housing 30 or the unit cell 31. The shape is a combination of lines with an angle of 60 °.
バスバー６０の一部が、組電池１００同士の隙間に配置されていればよいが、隙間に配置されるとは、例えば図７に示されるように、素電池３１の縁を結ぶ直線（共通の接線）６３よりも内側にバスバー６０の一部が配置されていればよい。 A part of the bus bar 60 may be arranged in the gap between the assembled batteries 100. However, the arrangement in the gap means, for example, as shown in FIG. A part of bus bar 60 should just be arrange | positioned inside 63).
かかる構成によれば、本発明の電池モジュールは、複数の素電池を有する組電池の複数を電気接続することで、大容量化されている。しかも、組電池同士の電気接続部がコンパクトであるので、電池モジュールのエネルギー密度が高まる。よって、大容量化とともに、エネルギー密度の向上が望まれる用途の電池モジュールに用いられうる。 According to such a configuration, the battery module of the present invention has a large capacity by electrically connecting a plurality of assembled batteries having a plurality of unit cells. And since the electrical connection part of assembled batteries is compact, the energy density of a battery module increases. Therefore, it can be used for a battery module for applications where an increase in capacity and an improvement in energy density are desired.
なお、前述の通り、バスバー６０は正六角形状であるが、中実状態でも中空状態であってもよい。組電池１００に接合される面のみにその接合代のみあればよいため、中実の場合は、例えば図８（ａ）〜（ｆ）のような形状でもかまわないし、中空の場合は、例えば図８（ｇ）〜（ｉ）のような形状であってもかまわない。 As described above, the bus bar 60 has a regular hexagonal shape, but may be a solid state or a hollow state. Since only the joining allowance needs to be provided only on the surface joined to the assembled battery 100, in the case of a solid, for example, the shape as shown in FIGS. 8A to 8F may be used. A shape such as 8 (g) to (i) may be used.
図８（ａ）〜（ｂ）のバスバー６０ａ、バスバー６０ｂは正六角形の柱で、バスバー６０ｂは角をＲ加工したものである。また、図８（ｃ）〜（ｆ）のバスバー６０ｃ〜６０ｆは、正極集電板１０または負極集電板５０との接続部が六角形状を対称の頂点で半分にした台形を有する形状である。図８（ｇ）のバスバー６０ｇは正六角形の中空柱である。また、図８（ｈ）〜（ｉ）のバスバー６０ｈ〜６０ｉは、正極集電板１０または負極集電板５０との接続部が六角形状を対称の頂点で半分にした台形で中空にした形状である。 The bus bar 60a and the bus bar 60b in FIGS. 8A to 8B are regular hexagonal columns, and the bus bar 60b has a rounded corner. Moreover, the bus bars 60c to 60f in FIGS. 8C to 8F have a trapezoidal shape in which a connection portion with the positive electrode current collector plate 10 or the negative electrode current collector plate 50 is halved from a hexagonal shape at a symmetrical vertex. . The bus bar 60g in FIG. 8G is a regular hexagonal hollow column. Also, the bus bars 60h to 60i in FIGS. 8 (h) to 8 (i) have a trapezoidal shape in which the connection portion with the positive electrode current collector plate 10 or the negative electrode current collector plate 50 is halved at a symmetrical vertex. It is.
本発明の電池モジュールは、互いに電気接続された複数の組電池を有するので大容量の電池モジュールである。しかも、組電池を電気接続する接続部がコンパクトであるので、エネルギー密度の高い電池モジュールである。よって、大容量化とともに、エネルギー密度の向上が望まれる用途の電池モジュールに用いられうる。 Since the battery module of the present invention has a plurality of assembled batteries electrically connected to each other, it is a large capacity battery module. And since the connection part which electrically connects an assembled battery is compact, it is a battery module with a high energy density. Therefore, it can be used for a battery module for applications where an increase in capacity and an improvement in energy density are desired.
１０、１０ａ、１０ｂ 正極集電板
２０、２０ａ、２０ｂ 正極側ホルダー
３０、３０ａ、３０ｂ ハウジング
３１、３１ａ、３１ｂ 素電池
４０、４０ａ、４０ｂ 負極側ホルダー
５０、５０ａ、５０ｂ 負極集電板
６０、６０ａ〜６０ｉ バスバー
７０、７０ａ〜７０ｃ 接続端子
７１、７１ａ〜７１ｃ 溶接部
７２、７２ａ〜７２ｃ 接続部
１００、１００ａ、１００ｂ 組電池
２００ 電池モジュール
10, 10a, 10b Positive electrode current collector plate 20, 20a, 20b Positive electrode side holder 30, 30a, 30b Housing 31, 31a, 31b Unit cell 40, 40a, 40b Negative electrode side holder 50, 50a, 50b Negative electrode current collector plate 60, 60a -60i Bus bar 70, 70a-70c Connection terminal 71, 71a-71c Welding part 72, 72a-72c Connection part 100, 100a, 100b Battery pack 200 Battery module
Claims (7)
複数の素電池を配列した第２の組電池と、
前記第１の組電池の集電板と前記第２の組電池の集電板とを電気接続するバスバーを備え、
前記第１の組電池及び前記第２の組電池は、前記複数の素電池が配置されて、端部に素電池同士の隙間を有し、
前記バスバーは、前記第１の組電池の隙間および第２の組電池の隙間の少なくとも一方に配置され、前記集電板との接続部が前記組電池の端面から前記隙間に対して６０°の角度で挿入される形状であることを特徴とする電池モジュール。 A first assembled battery in which a plurality of unit cells are arranged;
A second assembled battery in which a plurality of unit cells are arranged;
A bus bar for electrically connecting the current collecting plate of the first assembled battery and the current collecting plate of the second assembled battery;
In the first assembled battery and the second assembled battery, the plurality of unit cells are arranged, and a gap between the unit cells is provided at an end portion.
The bus bar is disposed in at least one of the gap of the first assembled battery and the gap of the second assembled battery, and the connection portion with the current collector plate is 60 ° from the end face of the assembled battery with respect to the gap. A battery module having a shape inserted at an angle .
複数の素電池を配列した第２の組電池と、 A second assembled battery in which a plurality of unit cells are arranged;
前記第１の組電池の集電板と前記第２の組電池の集電板とを電気接続するバスバーを備え、 A bus bar for electrically connecting the current collecting plate of the first assembled battery and the current collecting plate of the second assembled battery;
前記第１の組電池及び前記第２の組電池は、前記複数の素電池が配置されて、端部に素電池同士の隙間を有し、 In the first assembled battery and the second assembled battery, the plurality of unit cells are arranged, and a gap between the unit cells is provided at an end portion.
前記バスバーは、前記第１の組電池の隙間および第２の組電池の隙間に配置されると共に、前記隙間を囲む素電池の中心を結ぶ線の相似形であることを特徴とする電池モジュール。 The bus bar is disposed in the gap between the first assembled battery and the gap between the second assembled batteries, and has a similar shape to a line connecting the centers of the cells surrounding the gap.
前記隙間はｎ−１個の列の列方向の端部に有することを特徴とする、請求項１あるいは２に記載の電池モジュール。 The unit cells are arranged in n (n is an integer greater than or equal to 2), n−1, and n rows, and are closest packed to form a triangle with two cells in adjacent rows. Are arranged,
The gap is characterized by having the ends of the column direction of the n-1 rows, the battery module according to claim 1 or 2.
前記接続端子は、前記集電板との接続部が前記組電池の端面から前記隙間に対して６０°の角度で挿入される形状であることを特徴とする、請求項１あるいは２に記載の電池モジュール。 A connection terminal is provided in a gap different from the gap with the bus bar,
The connection terminal is characterized in that the connection portion between the collector plate has a shape that is inserted at an angle of 60 ° with respect to the gap from the end surface of the battery pack, according to claim 1 or 2 Battery module.
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| KR101985387B1 (en) * | 2016-03-14 | 2019-06-03 | 신흥에스이씨주식회사 | Battery package with improved durability |
| WO2018003467A1 (en) * | 2016-06-29 | 2018-01-04 | パナソニックＩｐマネジメント株式会社 | Battery block and battery module |
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| FR3069960B1 (en) | 2017-08-03 | 2019-08-09 | Saft | MULTI-BATTERY ASSEMBLY AND CONTAINER COMPRISING SUCH AN ASSEMBLY |
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| KR102108648B1 (en) * | 2017-11-09 | 2020-05-07 | 신흥에스이씨주식회사 | Battery pack for energy storage system haveing terminal retainer |
| KR102160342B1 (en) * | 2017-11-09 | 2020-09-25 | 신흥에스이씨주식회사 | Battery pack of one body busbar for energy storage system |
| KR102288405B1 (en) | 2017-12-26 | 2021-08-09 | 주식회사 엘지에너지솔루션 | Cylindrical battery cell assembly improved in space utilization and safety and battery module including the same |
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| JP4374809B2 (en) * | 2001-08-07 | 2009-12-02 | 新神戸電機株式会社 | Assembled battery |
| JP3915669B2 (en) * | 2002-11-13 | 2007-05-16 | 新神戸電機株式会社 | Assembled battery |
| CN102013509B (en) * | 2008-10-01 | 2014-05-21 | 江森自控帅福得先进能源动力***有限责任公司 | Battery module having electrochemical cells with integrally formed terminals |
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2011
- 2011-07-29 JP JP2011166286A patent/JP5824612B2/en active Active
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