JP2010218716A - Battery pack - Google Patents

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JP2010218716A
JP2010218716A JP2009060641A JP2009060641A JP2010218716A JP 2010218716 A JP2010218716 A JP 2010218716A JP 2009060641 A JP2009060641 A JP 2009060641A JP 2009060641 A JP2009060641 A JP 2009060641A JP 2010218716 A JP2010218716 A JP 2010218716A
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battery
spacer
heat
heat transfer
assembled battery
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Masayuki Fujiwara
雅之 藤原
Masataka Shinyashiki
昌孝 新屋敷
Hitoshi Maeda
仁史 前田
Nobuyuki Tamura
宜之 田村
Yasuyuki Okuda
泰之 奥田
Atsuhiro Funabashi
淳浩 船橋
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Sanyo Electric Co Ltd
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Sanyo Electric Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

<P>PROBLEM TO BE SOLVED: To provide a batter pack capable of sufficiently providing heat conductivity to an external part even when sealed and arranged in a limited space, and capable of effectively applying uniform constitutive pressure to respective cells. <P>SOLUTION: The battery pack 20 has: a plurality of laminated batteries 21; an external facing member 23 extending along the laminating direction of the batteries 21 and having the heat conductivity; and a spacer 22 having a heat insulation part 22M, a heat transfer part 22T on both sides of the heat insulation part 22M and an outside abutting surface part 24D connected to the heat transfer part 22T, wherein the battery pack is configured such that the heat transfer part 22T is inserted between the batteries 21, and abuts in a plane on a surface of the batteries 21, and the outside abutting surface part 24D abuts in a plane on the external facing member 23. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、複数の電池よりなる組電池に関し、特に電池に発生する熱を効率よく外部に放熱することができてハイレート特性に優れる大容量の組電池に関するものである。   The present invention relates to an assembled battery including a plurality of batteries, and more particularly to a large-capacity assembled battery that can efficiently dissipate heat generated in the battery to the outside and has excellent high rate characteristics.

例えばロボットや小型動力のモバイル機器等の電源は、限られた空間に密閉されるものであるため、小型軽量で低コストであること等が要望される。このような要望を満足するものとして、近年、高エネルギー密度を有するリチウムイオン電池が注目されている。このリチウムイオン電池は、高出力とするため、例えば５、６セル程度ないし１０数セル程度の多数の電池を直列または並列に接続して組電池として使用される。   For example, power supplies for robots and small powered mobile devices are hermetically sealed in a limited space, and thus are demanded to be small and light and low cost. In recent years, lithium ion batteries having a high energy density have attracted attention as satisfying such demands. In order to obtain a high output, this lithium ion battery is used as an assembled battery by connecting a large number of batteries, for example, about 5 or 6 cells to about 10 or more cells in series or in parallel.

しかしながら、上記のような用途に使用される組電池は、ハイレートで使用されて放電時に各電池（単電池）が発熱するが、上述のように密閉空間に設置される場合には空気中に放熱することができないので温度が上昇し、運転上限温度にまで達すると電池が放電できなくなるという問題がある。   However, an assembled battery used for the above-described purposes is used at a high rate, and each battery (unit cell) generates heat during discharging. However, when it is installed in a sealed space as described above, it dissipates heat into the air. The temperature rises because it cannot be performed, and there is a problem that the battery cannot be discharged when it reaches the operation upper limit temperature.

そこで、特許文献１および特許文献２には、断熱材を両側から伝熱（放熱）材で挟持した３層構造を有する中間部材を単電池間に介装するようにして組電池を構成することが開示されている。このような構成によれば、断熱材によって単電池間の熱伝達を遮断することができるとともに、単電池に発生した熱を伝熱（放熱）材によって放熱することができる。   Therefore, in Patent Document 1 and Patent Document 2, an assembled battery is configured such that an intermediate member having a three-layer structure in which a heat insulating material is sandwiched by heat transfer (heat radiation) materials from both sides is interposed between single cells. Is disclosed. According to such a configuration, heat transfer between the single cells can be blocked by the heat insulating material, and heat generated in the single cells can be radiated by the heat transfer (heat radiation) material.

特開２００４−３６２８７９号公報JP 2004-362879 A 特開２００６−１９６２３０号公報JP 2006-196230 A

しかしながら、前記特許文献１では、中間部材に溝状の通路を形成し、この通路に空気等の冷却媒体を流通させることによって放熱性を確保するようにしており、冷却ファン等を設けて通路に冷却風を強制的に流通させることによりさらに冷却を促進できることも記載されているが、例えば前述のように組電池が限られた空間に密閉されて設置される場合には、ファン等の強制空冷機構を設置することも困難であるため、通路に冷却媒体を流通させる方法によっては期待できる冷却効果にも限界があり、したがって外部へ固体の熱伝導により放熱することが必要となる。前記特許文献１では、断熱部材の両側に高熱伝導部材を配置して前述のような３層構造とすることが開示されているが、この高熱伝導部材によって電池から効率よく受熱するとともに放熱面積を大きくするとの記載があるのみであって、この高熱伝導部材から外部への熱伝導については具体的に記載されておらず、したがって、この高熱伝導部材は通路を流通させる冷却媒体への熱伝導を意図したものと考えられ、上述のような、通路に冷却媒体を流通させる方法により得られる冷却効果の限界を脱するものとは言い難い。   However, in Patent Document 1, a groove-shaped passage is formed in the intermediate member, and heat dissipation is ensured by circulating a cooling medium such as air through the passage. A cooling fan or the like is provided in the passage. Although it is also described that cooling can be further promoted by forcibly circulating cooling air, for example, when an assembled battery is installed in a limited space as described above, forced air cooling such as a fan is performed. Since it is also difficult to install a mechanism, there is a limit to the cooling effect that can be expected depending on the method of circulating the cooling medium in the passage, and therefore it is necessary to dissipate the heat to the outside by solid heat conduction. In Patent Document 1, it is disclosed that a high heat conductive member is disposed on both sides of a heat insulating member to form the above-described three-layer structure. However, the high heat conductive member efficiently receives heat from the battery and reduces the heat dissipation area. There is only a description that the heat conduction is increased, and the heat conduction from the high heat conduction member to the outside is not specifically described. Therefore, the high heat conduction member does not conduct heat conduction to the cooling medium flowing through the passage. It is considered that it was intended, and it is difficult to say that it is beyond the limit of the cooling effect obtained by the method of circulating the cooling medium through the passage as described above.

また、角型に構成された積層式電池等を単電池として構成される組電池の場合、ハイレート特性を得るためには各単電池に均一な圧力（構成圧）をかけることが必要であるが、前記特許文献１にはこの点についての記載はなく、ましてや、上述の高熱伝導部材を外部への熱伝導性を確保しながら外装体等の外部の部材に固定する構造等については一切考慮されていない。一方、前記特許文献２には、中間部材である層間部材を熱伝達部材で連結して外殻部材としてのケーシングを形成することが記載されており、この構成によれば中間部材から熱伝達部材を介して外部へ熱伝導させることが可能である。ところが、この特許文献２では、層間部材と熱伝達部材とを一体成形して、各層間部材の間に各単電池を圧入するようにしており、この構造によっては、各単電池に構成圧をかける工程において、層間部材と熱伝達部材との連結部が一体的に固定されていることから、熱伝達部材が外殻部材としての剛性を有するものであると、特にこの連結部の近傍において層間部材の幅が固定されることとなり、したがって各単電池に均一な構成圧をかけることは困難である。   In addition, in the case of an assembled battery in which a stacked battery or the like configured in a square shape is configured as a single battery, it is necessary to apply a uniform pressure (constitutive pressure) to each single battery in order to obtain high rate characteristics However, the above-mentioned patent document 1 does not describe this point, and in addition, the structure for fixing the above-described high heat conductive member to an external member such as an exterior body while ensuring the heat conductivity to the outside is considered at all. Not. On the other hand, Patent Document 2 describes that an interlayer member as an intermediate member is connected by a heat transfer member to form a casing as an outer shell member. According to this configuration, the heat transfer member is formed from the intermediate member. It is possible to conduct heat to the outside via. However, in this patent document 2, an interlayer member and a heat transfer member are integrally formed, and each unit cell is press-fitted between each interlayer member. Depending on this structure, a component pressure is applied to each unit cell. In the step of applying, since the connecting portion between the interlayer member and the heat transfer member is fixed integrally, the heat transfer member has rigidity as an outer shell member, particularly in the vicinity of this connecting portion. The width of the member is fixed, and therefore it is difficult to apply a uniform component pressure to each unit cell.

したがって、本発明は、限られた空間に密閉されて設置される場合にも外部への熱伝導性を十分に得ることができるとともに、各単電池に均一な構成圧を効果的にかけることが可能な組電池を提供することを目的とする。   Therefore, the present invention can sufficiently obtain thermal conductivity to the outside even when installed in a limited space, and can effectively apply a uniform component pressure to each unit cell. An object is to provide a possible assembled battery.

上記目的を達成する為に、本発明に係る組電池は、
積層された複数の電池と、
電池の積層方向に沿って延びると共に、熱伝導性を有する外装部材と、
断熱性を有する断熱部と、断熱部の両側に配置され熱伝導性を有する伝熱部と、伝熱部に連結された熱伝導性を有する外側当接面部とを有するスペーサと、
を備え、
伝熱部が電池間に介挿されて電池の表面に面的に当接するとともに、外側当接面部が外装部材に面的に当接していることを特徴とする。 In order to achieve the above object, the assembled battery according to the present invention is:
A plurality of stacked batteries;
An exterior member extending along the battery stacking direction and having thermal conductivity;
A spacer having a heat insulating portion having heat insulating properties, a heat transfer portion disposed on both sides of the heat insulating portion and having heat conductivity, and an outer contact surface portion having heat conductivity connected to the heat transfer portion;
With
The heat transfer portion is interposed between the batteries and is in surface contact with the surface of the battery, and the outer contact surface portion is in surface contact with the exterior member.

本発明において、「外装部材」には、一般に、積層された複数の電池を外側から覆い得るものであればいかなる部材も含まれ、例えば、矩形板状の電池が積層されて全体として概略直方体状に構成された電池積層体の場合、該電池積層体の６面をそれぞれ覆う底板、天板、側板、正面板、背面板等がいずれも含まれるが、「電池の積層方向に沿って延びると共に、熱伝導性を有する外装部材」とは、例えば上記のような概略直方体状の電池積層体の場合であれば、該電池積層体の６面のうち、両端部の電池の外側面を除く４面（即ち積層された各電池の周縁が位置する４面）のうちの少なくとも１面を覆うように延び、アルミニウム、銅等の熱伝導性を有する材料よりなる部材を含意し、例えば該電池積層体が電池の積層方向を前後方向に向けて配置される場合には、熱伝導性材料よりなる、底板、側板、少なくとも一方の側板と底板とを一体に成形してなる断面Ｌ字形状ないし溝形状の部材、等がこれに該当する。   In the present invention, the “exterior member” generally includes any member that can cover a plurality of stacked batteries from the outside. For example, a rectangular plate-shaped battery is stacked to form a substantially rectangular parallelepiped shape as a whole. In the case of the battery stack configured as described above, a bottom plate, a top plate, a side plate, a front plate, a back plate and the like covering each of the six surfaces of the battery stack are included. In the case of an approximately rectangular parallelepiped battery stack as described above, for example, the “exterior member having thermal conductivity” 4 excludes the outer surfaces of the batteries at both ends of the six surfaces of the battery stack. A member made of a material having thermal conductivity, such as aluminum and copper, extending so as to cover at least one of the surfaces (that is, four surfaces on which the periphery of each stacked battery is positioned), for example, the battery stack The body faces the battery stacking direction When placed Te is made of thermally conductive material, a bottom plate, side plates, at least one side plate and the bottom plate and the member of L-shaped cross section or a groove shape formed by molding integrally, and the like corresponds to this.

また、「断熱部」としては、例えば、樹脂等の断熱材が膜状、層状等に成形された部位がいずれも含まれ、さらに具体的には例えば樹脂等よりなる断熱シート等が挙げられる。
また、「伝熱部」としては、例えば、アルミニウム、銅等の熱伝導性を有する材料が膜状、層状等に成形された部位がいずれも含まれ、さらに具体的には例えばアルミニウム、銅等の金属よりなる金属板等が挙げられる。
また、「外側当接面部」としては、熱伝導性を有し外装部材に面的に当接し得る当接面を有するものであればよく、例えば、アルミニウム、銅等の金属を断面コ字形状、断面Ｌ字形状、角管状、角棒状（中実の角柱状）等の形状に成形してなる部材をスペーサの伝熱部に溶接等により連結することによって当接面を形成するようにしたものや、あるいはスペーサの端部を一方に折曲することによって当接面を形成するようにしたもの等がいずれも含まれる。 The “heat insulating part” includes, for example, any part where a heat insulating material such as a resin is formed into a film, a layer, or the like, and more specifically, includes a heat insulating sheet made of a resin or the like.
Further, the “heat transfer part” includes, for example, any part where a material having thermal conductivity such as aluminum or copper is formed into a film, a layer, or the like, and more specifically, for example, aluminum, copper, or the like. Examples thereof include a metal plate made of the above metal.
Further, the “outer contact surface portion” may be any material as long as it has a heat conductivity and a contact surface capable of surface contact with the exterior member. For example, a metal such as aluminum or copper is formed in a U-shaped cross section. The contact surface is formed by connecting a member formed into an L-shaped cross-section, a rectangular tube, a rectangular bar shape (solid prismatic shape) or the like to the heat transfer portion of the spacer by welding or the like. Any of them, or those in which the abutting surface is formed by bending the end of the spacer to one side are included.

上記構成によれば、電池に発生した熱が、スペーサの伝熱部、外側当接面部および外装部材を経て外部へ放散される。即ち、組電池を構成する単電池と組電池の外部空間との間に、スペーサの伝熱部から外側当接面部を経て外装部材へと至る伝熱経路が形成され、この伝熱経路によって外部への熱伝導性を確保することができるようになっている。このとき、スペーサの伝熱部が電池の表面に対し面的に当接して十分に受熱面積が確保されるとともに、外側当接面部が外装部材に対し面的に当接することによって伝熱面積が十分に確保され、これにより外部への熱伝導性が十分に得られることとなる。   According to the said structure, the heat which generate | occur | produced in the battery is dissipated outside through the heat-transfer part of a spacer, an outer side contact surface part, and an exterior member. That is, a heat transfer path is formed between the unit battery constituting the assembled battery and the outer space of the assembled battery, from the heat transfer portion of the spacer to the exterior member through the outer contact surface portion, and this heat transfer route It is possible to ensure thermal conductivity. At this time, the heat transfer portion of the spacer is in surface contact with the surface of the battery to secure a sufficient heat receiving area, and the outer contact surface portion is in surface contact with the exterior member to reduce the heat transfer area. Sufficiently secured, thereby providing sufficient thermal conductivity to the outside.

また、スペーサが外側当接面部で外装部材に当接する構造となっているので、組電池の組立工程において、スペーサを外装部材に接合する前の段階であれば、スペーサはいずれの部位においても拘束されておらず遊動し得る余裕を有しており、したがってこの段階で複数の単電池を両側から挟むようにして加圧することにより、各単電池に構成圧を十分にかけることができ、またこのとき、スペーサの伝熱部が電池の表面に対し面的に当接するので、各単電池に構成圧を均一にかけることができる。   In addition, since the spacer is in contact with the exterior member at the outer contact surface portion, the spacer is restrained at any part in the assembly process of the assembled battery before the spacer is joined to the exterior member. Therefore, it is possible to sufficiently apply a component pressure to each unit cell by applying pressure by sandwiching a plurality of unit cells from both sides at this stage. Since the heat transfer part of the spacer is in surface contact with the surface of the battery, the constituent pressure can be applied uniformly to each unit cell.

前記スペーサが伝熱部に連結された内側当接面部を備え、内側当接面部が電池の側端面に面的に当接していることが望ましい。   It is desirable that the spacer includes an inner contact surface portion connected to the heat transfer portion, and the inner contact surface portion is in surface contact with the side end surface of the battery.

本発明において、「内側当接面部」としては、熱伝導性を有し電池の側端面に面的に当接し得る当接面を有するものであればよく、例えば、アルミニウム、銅等の金属を断面コ字形状、断面Ｌ字形状、角管状、角棒状等の形状に成形してなる部材をスペーサの伝熱部に溶接等により連結することによって当接面を形成するようにしたもの等がいずれも含まれる。
また、この場合の「電池の側端面」とは、スペーサの伝熱部に当接しない側面、即ち、例えば前述の矩形板状の電池の場合であれば、スペーサの伝熱部に当接する表面を除く辺縁部（四辺部）に位置する側端面がこれに該当する。 In the present invention, the “inner contact surface portion” may have any contact surface that has thermal conductivity and can contact the side end surface of the battery. For example, a metal such as aluminum or copper may be used. A member formed into a U-shaped cross-section, an L-shaped cross-section, a rectangular tube, a rectangular bar shape, or the like is connected to the heat transfer portion of the spacer by welding or the like to form a contact surface, etc. Both are included.
In this case, the “side end surface of the battery” refers to the side surface that does not contact the heat transfer portion of the spacer, that is, the surface that contacts the heat transfer portion of the spacer in the case of, for example, the aforementioned rectangular plate battery. This corresponds to the side end face located at the edge (four sides) excluding.

本発明において、組電池を構成する単電池としては、スペーサを介装して組電池を構成し得るものであればいずれも用いることができるが、本発明では前述の通り、単電池に均一な構成圧を十分にかけることができる構成となっていることから、軟質のラミネートフィルムよりなる外装体を用いた積層式電池（以下、「積層ラミネート型電池」とも称す）が特に好適に用いられる。さらに、この積層ラミネート型電池においては、２枚のラミネートフィルムよりなる外装体に積層電極体を挿入し辺縁部を溶着して封止する構成とすることが、最も容易かつ安価に作製できることから一般的となっており、このような構成の積層ラミネート型電池では辺縁部にラミネートフィルムの封止部が延出して耳部が形成されることとなる。この積層ラミネート型電池を単電池として組電池を構成する場合、各単電池からの受熱面積を確保するためには、各単電池の表面をスペーサの伝熱部に当接させるだけでなく、各単電池の辺縁部に位置する側端面も外装部材に当接させることが望ましいが、このとき上記のように耳部が形成されていると、該耳部が外装部材に当接することとなってこの部分では受熱面積を確保することが困難である。   In the present invention, as the unit cell constituting the assembled battery, any unit cell can be used as long as the assembled battery can be configured with a spacer interposed therebetween. A laminated battery using an exterior body made of a soft laminate film (hereinafter, also referred to as “laminated laminate battery”) is particularly preferably used because it has a structure capable of sufficiently applying the constituent pressure. Furthermore, in this laminated laminate type battery, it can be most easily and inexpensively manufactured by inserting a laminated electrode body into an exterior body made of two laminated films and sealing the edge portion by welding. In the laminated laminate type battery having such a configuration, the sealing portion of the laminate film extends to the edge portion to form the ear portion. In the case of constituting an assembled battery using this laminated laminate type battery as a single battery, in order to secure a heat receiving area from each single battery, not only the surface of each single battery is brought into contact with the heat transfer portion of the spacer, but also each Although it is desirable that the side end face located at the edge of the unit cell is also in contact with the exterior member, at this time, if the ear is formed as described above, the ear is in contact with the exterior member. It is difficult to secure a heat receiving area in the lever part.

そこで、スペーサに上述のような内側当接面部を設けて電池の側端面に面的に当接させるようにすれば、各単電池の表面だけでなく側端面からの受熱面積も確保することが可能となる。   Therefore, if the spacer is provided with the inner contact surface portion as described above so as to be brought into surface contact with the side end surface of the battery, it is possible to secure not only the surface of each unit cell but also the heat receiving area from the side end surface. It becomes possible.

前記スペーサが、中央片と両側片とからなる断面コ字形状の部材を有し、中央片が伝熱部に連結されると共に、各両側片が外側当接面部と内側当接面部とを構成していることが望ましい。   The spacer has a U-shaped member composed of a center piece and both side pieces, the center piece is connected to the heat transfer portion, and each side piece forms an outer contact surface portion and an inner contact surface portion. It is desirable that

前記外側当接面部は、例えば前述のようにスペーサの端部を一方に折曲するようにして形成してもよいが、この場合、内側当接面部は別の部材をスペーサに固定する等して形成することが必要である。これに対し、上記のように断面コ字形状の部材の中央片をスペーサに連結して各両側片で外側当接面部と内側当接面部とをそれぞれ構成するようにすると、スペーサに外側当接面部と内側当接面部とを一度に形成することができて作製が容易である。また、断面コ字形状の部材だけでなく、例えば前述のような角管や角棒を用いるようにしてもよいが、軽量化等の観点から断面コ字形状の部材を用いることが望ましい。   The outer abutting surface portion may be formed, for example, by bending the end of the spacer in one side as described above. In this case, the inner abutting surface portion fixes another member to the spacer. It is necessary to form. On the other hand, if the central piece of the U-shaped member is connected to the spacer as described above, and the outer abutting surface portion and the inner abutting surface portion are configured by each side piece, the outer abutting contact with the spacer. Since the surface portion and the inner contact surface portion can be formed at a time, the fabrication is easy. In addition to the U-shaped member, for example, a square tube or a square bar as described above may be used, but it is desirable to use a U-shaped member from the viewpoint of weight reduction.

前記外装部材に、冷媒を流通させ得る冷媒流通経路が形成されていることが望ましい。   It is desirable that a refrigerant flow path capable of flowing a refrigerant is formed in the exterior member.

上記構成によれば、冷媒流通経路に冷媒を流通させることで冷却効果が得られ、電池の温度上昇をより効果的に抑制することができる。   According to the said structure, a cooling effect is acquired by distribute | circulating a refrigerant | coolant to a refrigerant | coolant distribution path, and the temperature rise of a battery can be suppressed more effectively.

前記複数の電池を、該電池の積層方向に沿って両側から挟むようにして熱伝導性を有する加圧板が配置され、該加圧板に、断熱性を有する断熱部が形成されていることが望ましい。   It is desirable that a pressure plate having thermal conductivity is arranged so as to sandwich the plurality of batteries from both sides along the stacking direction of the batteries, and a heat insulating portion having heat insulation is formed on the pressure plate.

電池に圧力（構成圧）をかける締め付け治具である加圧板は、組電池の放熱性を確保するためにこれも熱伝導性を有するものとすることが望ましいが、該加圧板をそのまま電池の両側に配置すると、最も両側に配置される単電池から加圧板に直接的に熱が伝達され、これによりこの両端部が過度に冷却されることとなる。これに対し、上記のように加圧板に断熱部を形成するようにすると、両端部においても中央部と同様に外装部材を通って熱伝達がなされるようになって過度な冷却が抑制されることとなり、これにより組電池全体における温度分布のバランスを良好とすることができる。   The pressure plate, which is a clamping jig that applies pressure (constituent pressure) to the battery, is preferably also thermally conductive to ensure the heat dissipation of the assembled battery. If it arrange | positions at both sides, a heat | fever will be directly transmitted to the pressurization board from the cell arrange | positioned at the most both sides, and this both ends will be cooled too much by this. On the other hand, when the heat insulating portion is formed on the pressure plate as described above, heat transfer is performed through the exterior member at both end portions similarly to the central portion, and excessive cooling is suppressed. As a result, the balance of the temperature distribution in the entire assembled battery can be improved.

前記スペーサの内側当接面部と前記外装部材との間に、制御基板を配置する基板配置部を形成するようにしてもよい。   You may make it form the board | substrate arrangement | positioning part which arrange | positions a control board between the inner side contact surface part of the said spacer, and the said exterior member.

スペーサの内側当接面部と外装部材との間に形成される空間は、中央に電池の耳部が配置されるが、それ以外の大部分はデッドスペースとなる。そこで上記のように、この空間に、充放電等の制御を行う制御基板を配置する基板配置部を形成することで、この空間を有効に利用して組電池をその分コンパクト化することができる。   In the space formed between the inner contact surface portion of the spacer and the exterior member, the ear portion of the battery is arranged at the center, but most of the space is a dead space. Therefore, as described above, by forming a substrate placement portion for placing a control board for controlling charge / discharge, etc., in this space, the space can be effectively utilized, and the assembled battery can be made compact accordingly. .

前記スペーサの外側当接面部または外装部材に、前記複数の電池の積層方向に沿って延びる長孔が形成され、該長孔で前記外側当接面部が前記外装部材にネジまたはボルトにより接合されていることが望ましい。   A long hole extending in the stacking direction of the plurality of batteries is formed in the outer contact surface portion or the exterior member of the spacer, and the outer contact surface portion is joined to the exterior member by a screw or a bolt through the long hole. It is desirable.

スペーサの外側当接面部は、外装部材に対し、例えば溶接等によって接合するようにしてもよいが、上記のようにスペーサの外側当接面部または外装部材に、前記複数の電池の積層方向に沿って延びる長孔を形成して該長孔で外側当接面部を前記外装部材にネジまたはボルトにより接合するようにすると、仮止め状態では、スペーサが所定位置に保持されながら、電池の積層方向に沿ってわずかに移動（遊動）できるので、両側から加圧することにより各単電池に均一な構成圧を十分にかけることができ、したがって組電池の組み立て作業がより容易となる。   The outer contact surface portion of the spacer may be joined to the exterior member by welding, for example, but as described above, the outer contact surface portion of the spacer or the exterior member is aligned along the stacking direction of the plurality of batteries. When the outer abutment surface is joined to the exterior member with a screw or a bolt, the spacer is held in a predetermined position in the stacking direction of the battery. Therefore, it is possible to sufficiently apply a uniform component pressure to each unit cell by applying pressure from both sides, so that the assembly work of the assembled battery becomes easier.

本発明の構成によれば、組電池が限られた空間に密閉されて設置される場合であっても、電池に発生する熱を効率よく外部に放熱することができ、かつ、各単電池に均一な構成圧を容易かつ効果的にかけることが可能となり、したがってハイレート特性に優れる組電池を得ることができる。   According to the configuration of the present invention, even when the assembled battery is installed sealed in a limited space, the heat generated in the battery can be efficiently radiated to the outside, and A uniform component pressure can be easily and effectively applied, and thus an assembled battery having excellent high rate characteristics can be obtained.

本発明の組電池を構成する単電池（セル）の一部を示す図であって、同図（ａ）は正極の平面図、同図（ｂ）はセパレータの斜視図、同図（ｃ）は正極が内部に配置された袋状セパレータを示す平面図である。It is a figure which shows a part of unit cell (cell) which comprises the assembled battery of this invention, Comprising: The figure (a) is a top view of a positive electrode, The figure (b) is a perspective view of a separator, The figure (c). FIG. 3 is a plan view showing a bag-like separator having a positive electrode disposed therein. 本発明の組電池を構成する単電池（セル）に用いる負極板の平面図である。It is a top view of the negative electrode plate used for the single battery (cell) which comprises the assembled battery of this invention. 本発明の組電池を構成する単電池（セル）に用いる積層電極体の分解斜視図である。It is a disassembled perspective view of the laminated electrode body used for the single battery (cell) which comprises the assembled battery of this invention. 本発明の組電池を構成する単電池（セル）に用いる積層電極体の平面図である。It is a top view of the laminated electrode body used for the single battery (cell) which comprises the assembled battery of this invention. 正負極タブと正負極集電端子とを溶着した状態を示す平面図である。It is a top view which shows the state which welded the positive / negative electrode tab and the positive / negative electrode current collection terminal. 本発明の組電池を構成する単電池（セル）に用いる外装体に図５の積層電極体を挿入した状態の斜視図である。It is a perspective view of the state which inserted the laminated electrode body of FIG. 5 in the exterior body used for the single battery (cell) which comprises the assembled battery of this invention. 本発明の組電池を構成する単電池（セル）およびセパレータの斜視図である。It is a perspective view of the single battery (cell) and separator which comprise the assembled battery of this invention. 本発明の組電池を構成するセパレータの分解斜視図である。It is a disassembled perspective view of the separator which comprises the assembled battery of this invention. 底板にセパレータを部分的に配置した状況を示す斜視図である。It is a perspective view which shows the condition which has arrange | positioned the separator partially on the baseplate. 底板にセパレータを配置してスペーサユニットとした状況を示す右側面図である。It is a right view which shows the condition which has arrange | positioned the separator to the baseplate and set it as the spacer unit. 底板にセパレータを配置してスペーサユニットとした状況を示す正面図である。It is a front view which shows the condition which has arrange | positioned the separator to the baseplate and was set as the spacer unit. 本発明の組電池を構成する底板の斜視図である。It is a perspective view of the baseplate which comprises the assembled battery of this invention. 天板に単電池（セル）を取り付けてセルユニットとした状況を示す斜視図である。It is a perspective view which shows the condition which attached the single battery (cell) to the top plate, and was set as the cell unit. スペーサユニットとセルユニットとを一体化させた状況を示す斜視図である。It is a perspective view which shows the condition which integrated the spacer unit and the cell unit. 両端に位置する単電池（セル）の両側に加圧板を配置した状況を示す斜視図である。It is a perspective view which shows the condition which has arrange | positioned the pressure plate on the both sides of the cell (cell) located in both ends. 加圧板を取り付けたセルユニットおよびスペーサユニットに側板を配置する状況を示す斜視図である。It is a perspective view which shows the condition which arrange | positions a side plate to the cell unit and spacer unit which attached the pressurization plate. 本発明の組電池の分解斜視図である。It is a disassembled perspective view of the assembled battery of this invention. 本発明の組電池の要部拡大断面図である。It is a principal part expanded sectional view of the assembled battery of this invention. 組電池に基板配置部を形成した例を示す斜視図である。It is a perspective view which shows the example which formed the board | substrate arrangement | positioning part in the assembled battery.

以下、本発明を図面を参照しながら更に詳細に説明するが、本発明は以下の最良の形態になんら限定されるものではなく、その趣旨を変更しない範囲において適宜変更して実施することが可能なものである。   Hereinafter, the present invention will be described in more detail with reference to the drawings. However, the present invention is not limited to the following best modes, and can be implemented with appropriate modifications without departing from the spirit of the present invention. It is a thing.

〔正極の作製〕
正極活物質としてのＬｉＣｏＯ２を９０質量％と、導電剤としてのカーボンブラックを５質量％と、結着剤としてのポリフッ化ビニリデンを５質量％と、溶剤としてのＮ−メチル−２−ピロリドン（ＮＭＰ）溶液とを混合して正極用スラリーを調製した後、この正極用スラリーを、正極集電体としてのアルミニウム箔（厚み：１５μｍ）の両面に塗布した。その後、溶剤を乾燥し、ローラーで厚み０.１ｍｍにまで圧縮した後、図１（ａ）に示すように、所定の幅および高さを有する矩形状となるように切断して、両面に正極活物質層１ａを有する正極板１を作製した。この際、正極板１における一辺の一方端部から、所定の幅および高さを有する矩形状の活物質未塗布部を延出させて正極タブ１１とした。 [Production of positive electrode]
90% by mass of LiCoO 2 as a positive electrode active material, 5% by mass of carbon black as a conductive agent, 5% by mass of polyvinylidene fluoride as a binder, N-methyl-2-pyrrolidone as a solvent ( NMP) solution was mixed to prepare a positive electrode slurry, and this positive electrode slurry was applied to both surfaces of an aluminum foil (thickness: 15 μm) as a positive electrode current collector. Thereafter, the solvent is dried, compressed to a thickness of 0.1 mm with a roller, and then cut into a rectangular shape having a predetermined width and height as shown in FIG. A positive electrode plate 1 having an active material layer 1a was produced. At this time, a rectangular active material uncoated portion having a predetermined width and height was extended from one end portion of one side of the positive electrode plate 1 to form a positive electrode tab 11.

〔正極板が内部に配置された袋状セパレータの作製〕
図１（ｂ）に示すように、２枚の方形状のポリプロピレン（ＰＰ）製のセパレータ３ａ(厚み３０μｍ）の間に正極板１を配置した後、図１（ｃ）に示すように、セパレータ３ａの周辺部を融着部４で熱溶着して、正極板１が内部に収納・配置された袋状セパレータ３を作製した。 [Production of bag-shaped separator with positive electrode plate arranged inside]
As shown in FIG. 1 (b), after the positive electrode plate 1 is disposed between two rectangular polypropylene (PP) separators 3a (thickness 30 μm), the separators are separated as shown in FIG. 1 (c). The peripheral part of 3a was heat-welded by the fusion | melting part 4, and the bag-shaped separator 3 by which the positive electrode plate 1 was accommodated and arrange | positioned inside was produced.

〔負極の作製〕
負極活物質としての黒鉛粉末を９５質量％と、結着剤としてのポリフッ化ピニリデンを５質量％と、溶剤としてのＮＭＰ溶液とを混合して負極用スラリーを調製した後、この負極用スラリーを負極集電体としての銅箔(厚み：１０μｍ)の両面に塗布した。その後、溶剤を乾燥し、ローラーで厚み０．０８ｍｍにまで圧縮した後、図２に示すように、所定の幅および高さを有する矩形状となるように切断して、両面に負極活物質層２ａを有する負極板２を作製した。この際、負極板２の一辺において上記正極板１の正極タブ１１形成側端部と反対側となる端部から、所定の幅および高さを有する矩形状の活物質未塗布部を延出させて負極タブ１２とした。 (Production of negative electrode)
A negative electrode slurry was prepared by mixing 95% by mass of graphite powder as a negative electrode active material, 5% by mass of polyvinylidene fluoride as a binder, and an NMP solution as a solvent. It apply | coated to both surfaces of the copper foil (thickness: 10 micrometers) as a negative electrode collector. Thereafter, the solvent is dried, compressed to a thickness of 0.08 mm with a roller, and then cut into a rectangular shape having a predetermined width and height as shown in FIG. A negative electrode plate 2 having 2a was produced. At this time, a rectangular active material uncoated portion having a predetermined width and height is extended from an end portion of one side of the negative electrode plate 2 opposite to the positive electrode tab 11 forming side end portion of the positive electrode plate 1. Thus, a negative electrode tab 12 was obtained.

〔積層電極体の作製〕
上記正極板１が内部に配置された袋状セパレータ３を５０枚、負極板２を５１枚調製し、図３に示すように、該袋状セパレータ３と負極板２とを交互に積層した。その際、両端面部に負極板２が位置するようにした。ついで、図４に示すように、この積層体の両端面を形状保持のための絶縁テープ１９で接続して、積層電極体１０を得た。 (Production of laminated electrode body)
50 bag-shaped separators 3 and 51 negative electrode plates 2 each having the positive electrode plate 1 disposed therein were prepared, and the bag-shaped separators 3 and the negative electrode plates 2 were alternately laminated as shown in FIG. At that time, the negative electrode plate 2 was positioned at both end portions. Next, as shown in FIG. 4, both end surfaces of the laminate were connected with an insulating tape 19 for maintaining the shape to obtain a laminate electrode body 10.

〔集電端子の溶接〕
図５に示すように、積層された正極タブ１１および負極タブ１２のそれぞれの延出端部に、幅１５ｍｍ、厚み１ｍｍのアルミニウム板よりなる正極集電端子（集電端子）１５ならびに幅１５ｍｍ、厚み１ｍｍの銅板よりなる負極集電端子（集電端子）１６を、それぞれ超音波溶接法により接合した。 [Welding of current collector terminal]
As shown in FIG. 5, the positive electrode current collector terminal (current collector terminal) 15 made of an aluminum plate having a width of 15 mm and a thickness of 1 mm and a width of 15 mm are provided at the extended ends of the stacked positive electrode tab 11 and negative electrode tab 12. A negative electrode current collector terminal (current collector terminal) 16 made of a copper plate having a thickness of 1 mm was joined by ultrasonic welding.

〔外装体への封入〕
図６に示すように、あらかじめ電極体が設置できるように成形した２枚のラミネートフィルム１７で構成した外装体１８に、上記積層電極体１０を挿入し、正極集電端子１５および負極集電端子１６のみが外装体１８より外部に突出するよう正極集電端子１５および負極集電端子１６がある辺を熱融着するとともに、残りの３辺の内、２辺を熱融着した。 [Encapsulation in exterior body]
As shown in FIG. 6, the laminated electrode body 10 is inserted into an exterior body 18 composed of two laminate films 17 formed so that the electrode body can be installed in advance, and a positive current collecting terminal 15 and a negative current collecting terminal The sides where the positive electrode current collecting terminal 15 and the negative electrode current collecting terminal 16 are thermally fused so that only 16 protrudes from the exterior body 18 and two of the remaining three sides are thermally fused.

〔電解液の封入、密封化〕
上記外装体１８の熱溶着していない１辺から、エチレンカーボネート（ＥＣ）とメチルエチルカーボネート（ＭＥＣ）とが体積比で３０：７０の割合で混合された混合溶媒に、ＬｉＰＦ６が１Ｍ（モル／リットル）の割合で溶解された電解液を注入し、最後に熱溶着していない１辺を熱溶着することにより、図７に示す電池２１を作製した。この電池２１の幅Ｌ１は１００ｍｍ、高さＬ２は１１０ｍｍ（正極タブ１１および負極タブ１２の延出高さを含めると１３６ｍｍ）、厚みＴ１は１５ｍｍである。電池２１の上辺における幅方向両端より１０ｍｍだけ内側寄りの位置から、正極集電リード１５および負極集電リード１６がそれぞれ上方へ突出しており、該正極集電リード１５および負極集電リード１６の突出高さはラミネートフィルム１７の上端から１０ｍｍである。また、電池２１の周縁部には、ラミネートフィルム１７の封止部が延出して耳部２１Ｓが形成され、この耳部２１Ｓより内側（中央側）が、内部に積層電極体１０が封入されて該耳部２１Ｓより厚さ方向に両側へ膨出する形状となっている。 [Encapsulation and sealing of electrolyte]
LiPF 6 is 1M (moles) in a mixed solvent in which ethylene carbonate (EC) and methyl ethyl carbonate (MEC) are mixed at a volume ratio of 30:70 from one side where the outer package 18 is not thermally welded. The battery 21 shown in FIG. 7 was manufactured by injecting an electrolytic solution dissolved at a ratio of 1 / liter) and finally thermally welding one side that was not thermally welded. The battery 21 has a width L1 of 100 mm, a height L2 of 110 mm (136 mm including the extension heights of the positive electrode tab 11 and the negative electrode tab 12), and a thickness T1 of 15 mm. The positive current collecting lead 15 and the negative current collecting lead 16 protrude upward from positions on the upper side of the battery 21 by 10 mm from both ends in the width direction, and the positive current collecting lead 15 and the negative current collecting lead 16 protrude. The height is 10 mm from the upper end of the laminate film 17. Further, a sealing portion of the laminate film 17 extends to the peripheral portion of the battery 21 to form an ear portion 21S, and the inner side (center side) of the ear portion 21S is filled with the laminated electrode body 10 inside. It has a shape that bulges to both sides in the thickness direction from the ear 21S.

〔電池の放電容量の測定および温度上昇試験〕
上記電池２１を１．０Ｉｔ（１２Ａ）で放電したときに放電容量を測定したところ１２Ａｈであり、１０．０Ｉｔ（１２０Ａ）で放電したときの放電容量を測定したところ１０．８Ａｈであった。
また、密閉状態で設置された場合を想定して、上記電池２１を厚さ２０ｍｍの断熱材（カオウール）で断熱した状態で、２０℃、１０．０Ｉｔ（１２０Ａ）で放電を行って電池２１の温度を測定したところ、放電終了時に６０℃に上昇した。 [Battery discharge capacity measurement and temperature rise test]
When the discharge capacity was measured when the battery 21 was discharged at 1.0 It (12 A), it was 12 Ah, and when the discharge capacity was measured at 10.0 It (120 A), it was 10.8 Ah.
Further, assuming that the battery 21 is installed in a hermetically sealed state, the battery 21 is discharged at 20 ° C. and 10.0 It (120 A) in a state where the battery 21 is insulated with a 20 mm thick heat insulating material (kao wool). When the temperature was measured, it rose to 60 ° C. at the end of discharge.

〔スペーサユニットの組立〕
図８に示すように、幅Ｌ３＝１０２ｍｍ、高さＬ４＝１２２ｍｍ、厚さ０．５ｍｍの金属板（アルミニウム板）２２Ｔを調製し、この金属板２２Ｔの一方面に、断面コ字形状を有し金属（アルミニウム）よりなる長さ１０１ｍｍのコ字形部材２４の中央片を、該金属板２２Ｔの下端縁に揃えるようにして中央に位置するように（即ち金属板２２Ｔの両端との間に０．５ｍｍずつ間隔をおいて）配置し、溶接により接合した。このコ字形部材２４における中央片からの両側片の延出幅は、上記電池２１の厚さＴ１の１／２即ち７．５ｍｍよりもやや小となっており、また、両側片のうちの下側片となる一方側片には、両端近傍の位置にそれぞれネジ挿通孔（図示せず）が穿設されている。この金属板２２Ｔを、図９ないし図１１に示すように、間に０．５ｍｍのギャップをおいてコ字形部材２４が互いに背中合わせになるように２枚を一対として、底板２３の上に配置して仮ネジ止めし、両金属板２２Ｔの間のギャップに、厚さ０．５ｍｍのポリテトラフルオロエチレン（テフロン（登録商標））よりなる断熱シート２２Ｍを両金属板２２Ｔに密着するように挿入して、図８に示す構成を有するスペーサ２２とした。さらにこのスペーサ２２を、図９ないし図１１に示すように、中心間距離がＤ１＝１７ｍｍとなるように底板２３の上に１２個平行に並置するように構成してスペーサユニットとした。このスペーサユニットにおいて、隣接するスペーサ２２のコ字形部材２４における上側片の先端の間にはスリットが形成されている。また、図１０に示す、底板２３の下面からコ字形部材２４の上側片までの高さＨ１は１８ｍｍ、コ字形部材２４の上側片からスペーサ２２の上端までの高さＨ２は１１０ｍｍである。 [Assembly of spacer unit]
As shown in FIG. 8, a metal plate (aluminum plate) 22T having a width L3 = 102 mm, a height L4 = 122 mm, and a thickness of 0.5 mm is prepared, and one surface of the metal plate 22T has a U-shaped cross section. The center piece of the U-shaped member 24 made of metal (aluminum) having a length of 101 mm is positioned so as to be aligned with the lower end edge of the metal plate 22T (ie, between the both ends of the metal plate 22T). .5 mm apart) and joined by welding. The extension width of both side pieces from the central piece in the U-shaped member 24 is a little smaller than 1/2 of the thickness T1 of the battery 21, that is, 7.5 mm. Screw insertion holes (not shown) are formed in positions near the both ends of the one side piece as the side piece. As shown in FIGS. 9 to 11, the metal plate 22T is placed on the bottom plate 23 as a pair so that the U-shaped members 24 are back to back with a gap of 0.5 mm between them. Then, a heat insulating sheet 22M made of polytetrafluoroethylene (Teflon (registered trademark)) having a thickness of 0.5 mm is inserted into the gap between both metal plates 22T so as to be in close contact with both metal plates 22T. Thus, the spacer 22 having the configuration shown in FIG. 8 was obtained. Further, as shown in FIGS. 9 to 11, 12 spacers 22 are arranged in parallel on the bottom plate 23 so as to have a center-to-center distance of D1 = 17 mm to form a spacer unit. In this spacer unit, a slit is formed between the tips of the upper pieces of the U-shaped members 24 of the adjacent spacers 22. 10, the height H1 from the lower surface of the bottom plate 23 to the upper piece of the U-shaped member 24 is 18 mm, and the height H2 from the upper piece of the U-shaped member 24 to the upper end of the spacer 22 is 110 mm.

上記底板２３は、後述する天板２５、側板２６等とともに、組電池の外装部材となっており、図１０および図１１に示すように、長さＬ５＝２３５ｍｍ、幅Ｌ６＝１３１ｍｍ、厚さＴ２＝６ｍｍの長方形状のアルミニウムよりなるプレートであり、図１２に示すように、下面となる一方面には、直方体状に突出する多数のヒートシンクブロック２３Ｂが間隔をおいて格子状に配置形成され、これらヒートシンクブロック２３Ｂの間に格子状に延びる冷媒流通経路２３Ｇが形成されている。また、幅方向両端近傍にはそれぞれ、上記スペーサ２２におけるコ字形部材２４のネジ挿通孔に対応する位置に、電池２１の積層方向となる底板２３の長さ方向に沿ってやや長く延びる長孔２３Ｐが、底板２３の長さ方向に一列に多数（コ字形部材２４の配置数）配置形成されており、上記スペーサ２２のコ字形部材２４が仮ネジ止め状態で電池２１の積層方向にわずかに移動可能に保持されるようになっている。また、外周近傍には、外周縁に沿って、側板２６および加圧板２７を取り付けるための取付孔２３Ｆが一列に多数配置形成されている。   The bottom plate 23 is an exterior member of an assembled battery together with a top plate 25, side plates 26 and the like which will be described later. As shown in FIGS. 10 and 11, the length L5 = 235 mm, the width L6 = 131 mm, and the thickness T2. = 6 mm rectangular plate made of aluminum, and as shown in FIG. 12, a plurality of heat sink blocks 23 </ b> B projecting in a rectangular parallelepiped shape are arranged and formed in a grid pattern on one side which is a lower surface, A refrigerant flow path 23G extending in a lattice shape is formed between the heat sink blocks 23B. Further, in the vicinity of both ends in the width direction, long holes 23P that extend slightly longer along the length direction of the bottom plate 23, which is the stacking direction of the batteries 21, at positions corresponding to the screw insertion holes of the U-shaped member 24 in the spacer 22, respectively. However, a large number of U-shaped members 24 are arranged in a row in the length direction of the bottom plate 23, and the U-shaped members 24 of the spacers 22 move slightly in the stacking direction of the batteries 21 in a temporarily screwed state. It is designed to be held as possible. In the vicinity of the outer periphery, a large number of mounting holes 23F for mounting the side plate 26 and the pressure plate 27 are arranged in a row along the outer peripheral edge.

〔セルユニットの組立〕
図１３に示すように、単電池（セル）として上記電池２１を１３個用意して厚さ方向に積層するように配置し、各電池２１の正極集電端子１５および負極集電端子１６を、接続ブロック２８（図１７参照）を介してそれぞれ天板２５の下面に仮ネジ止めして、セルユニットとした。さらに、図１４に示すように、上記スペーサ２２の間ないし両側に各電池２１を１個ずつ下端まで挿入するようにして、このセルユニットを上記スペーサユニットと一体化させた。このとき、各電池２１は、上述のように隣接するスペーサ２２のコ字形部材２４の間に形成されたスリットに下端部の耳部２１Ｓを挿通するようにしてスペーサ２２の下端まで挿入され、これにともない、各電池２１の膨出部の下端面がコ字形部材２４における上側片の上面に密着しながら支承される。 [Assembly of cell unit]
As shown in FIG. 13, 13 batteries 21 are prepared as single cells (cells) and arranged so as to be stacked in the thickness direction, and the positive current collecting terminal 15 and the negative current collecting terminal 16 of each battery 21 are A cell unit was obtained by temporarily fixing the lower surface of the top plate 25 via a connection block 28 (see FIG. 17). Further, as shown in FIG. 14, each cell 21 is inserted to the lower end one by one between the spacers 22 or on both sides, and the cell unit is integrated with the spacer unit. At this time, each battery 21 is inserted into the slit formed between the U-shaped members 24 of the adjacent spacers 22 as described above and inserted to the lower end of the spacers 22 so as to pass the ears 21S at the lower end portions. Accordingly, the lower end surface of the bulging portion of each battery 21 is supported while being in close contact with the upper surface of the upper piece of the U-shaped member 24.

上記天板２５は、上記底板２３と同一の長方形状で絶縁性を有するプレートとなっており、上記底板２３の場合と同様に長孔が形成されていて（図示省略）、各電池２１を仮ネジ止めできるようになっている。   The top plate 25 is a rectangular plate having the same rectangular shape as the bottom plate 23, and has a long hole (not shown) as in the case of the bottom plate 23. It can be screwed.

〔セルの加圧〕
図１５に示すように、上記スペーサユニットと一体化させたセルユニットの両端に位置する電池２１の両側に、加圧板２７を配置して上記底板２３および天板２５に嵌合し、ボルトで締め付けることにより電池２１に加圧した。このとき、各ボルトの締め付けトルクは２０ｋｇｆとした。さらに、このように加圧した状態で、スペーサ２２を底板２３に対し本締めして固定した。 [Pressurization of the cell]
As shown in FIG. 15, pressure plates 27 are arranged on both sides of the battery 21 located at both ends of the cell unit integrated with the spacer unit, fitted to the bottom plate 23 and the top plate 25, and tightened with bolts. Thus, the battery 21 was pressurized. At this time, the tightening torque of each bolt was 20 kgf. Furthermore, the spacer 22 was finally tightened and fixed to the bottom plate 23 in a state of being pressurized in this way.

上記加圧板２７は、高さ１３８ｍｍ、幅１０２ｍｍ、厚みは最厚部（底板との連結部）１４ｍｍ、最薄部（単電池２１との対向部）８ｍｍのアルミニウム板とした。また、上記加圧板２７において電池２１に対向する表面より内側には断熱部が形成されており、該電池２１からの熱が加圧板２７を通して直接的には外部へ伝達されないようになっている。この断熱部は、アルミニウム板の一方面に、上記スペーサ２２の断熱シート２２Ｍと同様の断熱シートを配置し、さらに外側に上記スペーサ２２の金属板と同様の金属板を配置することにより構成され、これにより加圧板２７が、上記スペーサ２２と同様に、伝熱部の内側に断熱部が形成された構成となっている（図示省略）。   The pressure plate 27 was an aluminum plate having a height of 138 mm, a width of 102 mm, a thickness of 14 mm at the thickest part (connecting part with the bottom plate), and 8 mm at the thinnest part (opposite part of the unit cell 21). Further, a heat insulating portion is formed on the inner side of the pressure plate 27 facing the battery 21 so that heat from the battery 21 is not directly transmitted to the outside through the pressure plate 27. This heat insulating part is configured by disposing a heat insulating sheet similar to the heat insulating sheet 22M of the spacer 22 on one surface of the aluminum plate and further disposing a metal plate similar to the metal plate of the spacer 22 on the outside. Thereby, the pressure plate 27 has a configuration in which a heat insulating portion is formed inside the heat transfer portion (not shown), like the spacer 22.

〔組電池の完成〕
図１６に示すように、上記加圧板２７を取り付けたセルユニットおよびスペーサユニットにおいて、電池２１が露出している側面部に側板２６をそれぞれ配置固定し、各電池２１と天板２５との接続部を本締めして固定して、図１７の分解斜視図および図１８の要部拡大断面図に示す構成を有する組電池２０を得た。上記側板２６は、上記底板２３と同様のアルミニウムよりなるプレートとなっている。 [Completion of assembled battery]
As shown in FIG. 16, in the cell unit and spacer unit to which the pressure plate 27 is attached, the side plates 26 are respectively arranged and fixed on the side portions where the batteries 21 are exposed, and the connection portions between the respective batteries 21 and the top plate 25. The battery pack 20 having the structure shown in the exploded perspective view of FIG. 17 and the enlarged cross-sectional view of the main part of FIG. 18 was obtained. The side plate 26 is a plate made of aluminum similar to the bottom plate 23.

上記組電池２０においては、図１８に示すように、複数（１３個）の電池２１が、間にスペーサ２２を介装して加圧状態で配置されている。該スペーサ２２は、金属板２２Ｔの間に樹脂シート２２Ｍを挟んだ構成となっており、該金属板２２Ｔが、スペーサ２２の表面を含む外側を構成する伝熱部、樹脂シート２２Ｍが、該伝熱部より内側を構成する断熱部となっている。また、該スペーサ２２のコ字形部材２４における上側片２４Ｐおよび下側片２４Ｄの延出長さＷ１は、上述の通り電池２１の厚さＴ１の１／２より小となっているため、隣接するコ字形部材２４の間における上側片２４Ｐの延出端の間にスリット２４Ｓが形成されており、各電池２１の下端部が、該スリット２４Ｓに耳部２１Ｓを挿通するとともに、膨出部の下端面をコ字形部材２４における上側片２４Ｐの上面に密着させるようにして支承されている。この構造においては、コ字形部材２４の上側片２４Ｐが、電池２１の側端面に対し面的に当接する内側当接面部となっており、一方、コ字形部材２４の下側片２４Ｄが、外装部材である底板２３に対し面的に当接する外側当接面部となっている。   In the assembled battery 20, as shown in FIG. 18, a plurality (13) of batteries 21 are arranged in a pressurized state with spacers 22 interposed therebetween. The spacer 22 has a structure in which a resin sheet 22M is sandwiched between metal plates 22T. The metal plate 22T has a heat transfer portion that forms the outer side including the surface of the spacer 22, and the resin sheet 22M. It becomes the heat insulation part which comprises an inner side from a heat part. Further, the extension length W1 of the upper piece 24P and the lower piece 24D in the U-shaped member 24 of the spacer 22 is smaller than ½ of the thickness T1 of the battery 21 as described above, so that they are adjacent to each other. A slit 24S is formed between the extended ends of the upper piece 24P between the U-shaped members 24, and the lower end of each battery 21 is inserted into the slit 24S through the ear 21S and below the bulge. The end surface is supported so as to be in close contact with the upper surface of the upper piece 24P of the U-shaped member 24. In this structure, the upper piece 24P of the U-shaped member 24 is an inner abutting surface portion that is in surface contact with the side end surface of the battery 21, while the lower piece 24D of the U-shaped member 24 is the exterior. It is an outer abutment surface portion that abuts on the bottom plate 23 as a member.

上記組電池２０の構成においては、各電池２１から、スペーサ２２の伝熱部である金属板２２Ｔおよび内側当接面部であるコ字形部材２４の上側片２４Ｐを経て、外装部材である底板２３から外部へと至る伝熱経路が形成されている。ここで、上記金属板２２Ｔだけでなくコ字形部材２４の上側片２４Ｐもが各電池２１に対して面的に当接しているので、十分な受熱面積が確保されており、また、外側当接面部であるコ字形部材２４の下側片２４Ｄも底板２３に対して面的に当接しているので、十分な伝熱面積が確保されている。   In the configuration of the assembled battery 20, from each battery 21, the metal plate 22 </ b> T that is the heat transfer portion of the spacer 22 and the upper piece 24 </ b> P of the U-shaped member 24 that is the inner contact surface portion, and the bottom plate 23 that is the exterior member. A heat transfer path to the outside is formed. Here, not only the metal plate 22T but also the upper piece 24P of the U-shaped member 24 is in surface contact with each battery 21, so that a sufficient heat receiving area is ensured and the outer contact is made. Since the lower piece 24D of the U-shaped member 24, which is a surface portion, is also in surface contact with the bottom plate 23, a sufficient heat transfer area is secured.

また、上記組電池２０の組立において、中央部に配置される電池２１の表面に感圧紙を貼付しておき、加圧後にこの感圧紙を取り出して観察したところ、均一に変色していることが認められ、これにより各電池２１に均一に構成圧が加えられていることが確認された。   Further, in assembling the assembled battery 20, when pressure sensitive paper is pasted on the surface of the battery 21 disposed in the center, and the pressure sensitive paper is taken out and observed after pressurization, the color is uniformly discolored. As a result, it was confirmed that the constituent pressure was uniformly applied to each battery 21.

〔組電池の使用実験〕
上記組電池２０を密閉空間内に設置し、２０℃、１．０Ｉｔで充電して、１０．０Ｉｔで放電したときの温度上昇を測定したところ、放電直後の電池２１の温度は最大で５０℃まで上昇し、電池２１の温度のばらつきは５℃以内であった。この結果、この組電池２０における温度上昇は前述の断熱状態における電池２１の温度上昇よりも小さくなり、組電池２０を密閉空間内に設置しても、異常温度７０℃以上に達して停止するということがことなく、正常に運転し得ることがわかった。これは、密閉空間内にあっても、上述の伝熱経路によって外部への熱放散が促進されるとともに、断熱部である樹脂シート２２Ｍによって各電池２１間での熱伝達が抑制されたことによるものと考えられる。 [Use experiment of assembled battery]
When the assembled battery 20 was placed in a sealed space, charged at 20 ° C. and 1.0 It, and discharged at 10.0 It, the temperature of the battery 21 immediately after discharge was 50 ° C. at maximum. The temperature variation of the battery 21 was within 5 ° C. As a result, the temperature rise in the assembled battery 20 is smaller than the temperature rise of the battery 21 in the above-described heat insulation state, and even if the assembled battery 20 is installed in a sealed space, it reaches an abnormal temperature of 70 ° C. or more and stops. It turns out that it can drive normally without any problems. This is because, even in the sealed space, heat dissipation to the outside is promoted by the above-described heat transfer path, and heat transfer between the batteries 21 is suppressed by the resin sheet 22M which is a heat insulating portion. It is considered a thing.

〔組電池の効果〕
上記組電池２０の構成により、密閉空間内に設置された場合であっても、電池２１に発生する熱を効率よく外部に放熱することができ、従来の構成によっては温度上昇が大きくて放電が困難であった１０．０Ｉｔのハイレートでの運転を行うことが可能となっている。 [Effect of assembled battery]
With the configuration of the assembled battery 20, even when installed in a sealed space, the heat generated in the battery 21 can be efficiently radiated to the outside. Depending on the conventional configuration, the temperature rise is large and discharge occurs. This makes it possible to operate at a high rate of 10.0 It, which has been difficult.

また、積層式ラミネート型電池の構成を有する電池２１を単電池（セル）として構成される組電池２０において、各電池２１に均一な構成圧を容易かつ効果的にかけることが可能となっている。   Further, in the assembled battery 20 in which the battery 21 having the configuration of a laminated laminate battery is configured as a single battery (cell), it is possible to easily and effectively apply a uniform component pressure to each battery 21. .

また、スペーサ２２の伝熱部である金属板２２Ｔに連結された内側当接面部であるコ字形部材２４の上側片２４Ｐが、スペーサ２２における電池２１と対向する表面から延出して各電池２１の側端面すなわち膨出部の下端面に面的に当接し、前記内側当接面部の延出長さＷ１が、電池２１の厚さＴ１の１／２より小となっているため、隣接するコ字形部材２４の間における上側片２４Ｐの延出端の間にスリット２４Ｓが形成され、各電池２１の下端部が、該スリット２４Ｓに耳部２１Ｓを挿通するとともに、膨出部の下端面をコ字形部材２４における上側片２４Ｐの上面に密着させるようにして支承されているので、各単電池２１が精度よく位置決めして配置され、配置後の電池２１の位置ずれや、電池２１内部の電極すなわち正極板１ないし負極板２の位置ずれも効果的に防止されるようになっている。   Further, the upper piece 24P of the U-shaped member 24 that is an inner contact surface portion connected to the metal plate 22T that is the heat transfer portion of the spacer 22 extends from the surface of the spacer 22 that faces the battery 21, and A side end surface, that is, a lower end surface of the bulging portion, is abutted on the surface, and the extension length W1 of the inner abutting surface portion is smaller than ½ of the thickness T1 of the battery 21, so A slit 24S is formed between the extended ends of the upper piece 24P between the letter-shaped members 24, and the lower end portion of each battery 21 is inserted into the slit 24S through the ear portion 21S and the lower end surface of the bulging portion is connected to the lower end surface. Since the cell-shaped member 24 is supported so as to be in close contact with the upper surface of the upper piece 24P, each unit cell 21 is positioned and arranged with high accuracy. No positive electrode 1 Positional deviation of the negative electrode plate 2 is also adapted to be effectively prevented.

また、スペーサ２２における伝熱部および断熱部が、２枚の金属板２２Ｔの間にシート状の樹脂材料すなわち断熱シート２２Ｍを挟むように配置することにより形成されているので、断熱シート２２Ｍの樹脂により良好な弾性が確保されるとともに、金属板２２Ｔにより強度が確保されて電池２１表面の平面度が良好となっており、また伝熱部および断熱部の形成も容易となっている。   Moreover, since the heat transfer part and the heat insulating part in the spacer 22 are formed by placing a sheet-like resin material, that is, the heat insulating sheet 22M, between the two metal plates 22T, the resin of the heat insulating sheet 22M is formed. As a result, good elasticity is secured, the strength is secured by the metal plate 22T, the flatness of the surface of the battery 21 is good, and the formation of the heat transfer part and the heat insulation part is facilitated.

〔その他の事項〕
（１）上記組電池２０の構成においては、各電池２１から、スペーサ２２の伝熱部である金属板２２Ｔおよび内側当接面部であるコ字形部材２４の上側片２４Ｐを経て、外装部材である底板２３から外部へと至る伝熱経路が形成されているが、伝熱経路の熱伝導率は１００Ｗ／ｍ以上となっていることが望ましい。これにより、外部への熱伝導性をより良好とすることができる。１００Ｗ／ｍ以上の熱伝導率を有する材料としては、例えばアルミニウム、銅等の金属が挙げられ、これらの材料でスペーサの伝熱部、外側当接面部、内側当接面部、外装部材等の各部を構成することにより、良好な熱伝導性を有する伝熱経路を形成することができる。 [Other matters]
(1) In the configuration of the assembled battery 20, the battery 21 is an exterior member through the metal plate 22T that is the heat transfer portion of the spacer 22 and the upper piece 24P of the U-shaped member 24 that is the inner contact surface portion. Although a heat transfer path from the bottom plate 23 to the outside is formed, it is desirable that the heat conductivity of the heat transfer path is 100 W / m or more. Thereby, the heat conductivity to the exterior can be made more favorable. Examples of the material having a thermal conductivity of 100 W / m or more include metals such as aluminum and copper. With these materials, each part such as the heat transfer portion, the outer contact surface portion, the inner contact surface portion, and the exterior member of the spacer. By configuring, a heat transfer path having good thermal conductivity can be formed.

（２）上記組電池２０の構成においては、ポリテトラフルオロエチレン（テフロン（登録商標））よりなる断熱シート２２Ｍで断熱部が構成されているが、断熱部の熱伝導率は４Ｗ／ｍ以下となっていることが望ましい。これにより、各単電池間の熱伝達をより効果的に防止することができる。４Ｗ／ｍ以下の熱伝導率を有する材料としては、例えば上記ポリテトラフルオロエチレンの他にも、シリコン、ポリエチレン、ポリプロピレン、ポリウレタン等の樹脂が挙げられ、これらの材料でスペーサの断熱部を構成することにより良好な断熱性を得ることができる。また、樹脂を使用することにより、各電池に対する加圧力が樹脂の弾性によってさらに均一化されるという効果も得られる。 (2) In the configuration of the assembled battery 20, the heat insulating portion is formed of the heat insulating sheet 22M made of polytetrafluoroethylene (Teflon (registered trademark)), and the heat conductivity of the heat insulating portion is 4 W / m or less. It is desirable that Thereby, the heat transfer between each single cell can be prevented more effectively. Examples of the material having a thermal conductivity of 4 W / m or less include, in addition to the above polytetrafluoroethylene, resins such as silicon, polyethylene, polypropylene, and polyurethane, and these materials constitute the heat insulating portion of the spacer. Thus, good heat insulation can be obtained. Further, by using the resin, the effect that the pressure applied to each battery is further uniformed by the elasticity of the resin can be obtained.

（３）上記組電池２０の構成においては、スペーサ２２の内側当接面部であるコ字形部材２４の上側片２４Ｐと外装部材である底板２３（厳密には外側当接面部であるコ字形部材２４の下側片２４Ｄ）との間に空間が形成されているが、例えばこの空間に適宜部材や部品を配置するようにしてもよい。 (3) In the configuration of the assembled battery 20, the upper piece 24P of the U-shaped member 24 that is the inner contact surface portion of the spacer 22 and the bottom plate 23 that is the exterior member (strictly, the U-shaped member 24 that is the outer contact surface portion). A space is formed between the lower piece 24D) and a member or a part may be appropriately disposed in this space, for example.

図１９は、上記の空間に、制御基板を配置する基板配置部を形成するようにした例を示す図である。同図に示す例では、複数配列されたスペーサ２９のそれぞれにおいて、コ字形部材３０の長さ方向中央の位置に、該コ字形部材３０の長さ方向すなわちスペーサ２９の幅方向に沿ってやや長く延び、該コ字形部材３０の下端から上端まで拡がるように横長の矩形状の開口３０Ａが、一方側（スペーサ２９の表側または裏側）のコ字形部材３０から他方側（スペーサ２９の裏側または表側）のコ字形部材３０まで貫通するように穿設されている。これにより、複数配列されたスペーサ２９の開口３０Ａが該スペーサ２９の配列方向に一列に並置されるように配置形成されて、複数配列されたスペーサ２９の下端部中央を縦貫するように延びる基板配置部が形成されており、この基板配置部に制御ユニット３１が配置されている。この制御ユニット３１は、充放電等の制御を行う制御基板を備えるユニットとなっており、一方向にやや長く延びる矩形状の板状に構成され、スペーサ２９の配列方向に長さ方向を向けて上記開口３０Ａ内に挿通し、平伏させるようにして配置されている。   FIG. 19 is a diagram showing an example in which a board placement section for placing a control board is formed in the above space. In the example shown in the figure, in each of the plurality of arranged spacers 29, the length of the U-shaped member 30 is slightly longer along the length direction of the U-shaped member 30, that is, the width direction of the spacer 29. An elongated rectangular opening 30A extends so as to extend from the lower end to the upper end of the U-shaped member 30, and from the U-shaped member 30 on one side (the front side or the back side of the spacer 29) to the other side (the back side or the front side of the spacer 29). The U-shaped member 30 is drilled through. Thus, the substrate arrangement is formed such that the openings 30A of the plurality of arranged spacers 29 are arranged in a line in the arrangement direction of the spacers 29 and extend vertically through the center of the lower ends of the plurality of arranged spacers 29. The control unit 31 is arranged on this board arrangement part. The control unit 31 is a unit including a control board for controlling charge / discharge, etc., and is configured as a rectangular plate extending slightly longer in one direction, with the length direction directed in the arrangement direction of the spacers 29. The opening 30A is inserted and flattened.

前述の実施形態における組電池２０の構成では、スペーサ２２のコ字形部材２４における上側片２４Ｐと底板２３との間に形成される空間が、中央に電池２１の耳部２１Ｓが配置されるのみであって、それ以外の大部分は利用されずデッドスペースとなっているが、これに対しここに示す例では、この空間に制御ユニット３１を配置する基板配置部を形成することで、この空間が有効に利用されて組電池がその分コンパクト化されている。   In the configuration of the assembled battery 20 in the above-described embodiment, the space formed between the upper piece 24P and the bottom plate 23 in the U-shaped member 24 of the spacer 22 is only the ear portion 21S of the battery 21 disposed at the center. In addition, in the example shown here, by forming a substrate placement portion for placing the control unit 31 in this space, this space is not used and most of it is not used. The assembled battery is made more compact by being used effectively.

（４）上記組電池２０の構成においては、スペーサ２２を外側当接面部であるコ字形部材２４の下側片２４Ｄにより外装部材である底板２３に接合するようにしているが、これにかえて、あるいはこれとあわせて、スペーサを同様の接合構造により外装部材である側板に接合するようにしてもよい（図示せず）。特に、スペーサを底板だけでなく両側板にも接合するようにすれば、それだけより多くの伝熱面積を確保することができる。 (4) In the configuration of the assembled battery 20, the spacer 22 is joined to the bottom plate 23, which is an exterior member, by the lower piece 24D of the U-shaped member 24, which is the outer contact surface portion. Alternatively, in combination with this, the spacer may be joined to the side plate as the exterior member by a similar joining structure (not shown). In particular, if the spacer is bonded not only to the bottom plate but also to both side plates, a larger heat transfer area can be secured.

（５）上記組電池２０の構成においては、上述の通り、電池２１に発生する熱を伝熱経路によって効率よく外部に放熱することができるようになっており、限られた空間に密閉されて設置される場合に特に有用なものとなっているが、これとあわせて、ファン等による強制送風機構を設置するようにすると、送風による冷却効果が加わることにより、さらに効果的に温度上昇を抑制することができる。この場合、特に底板２３の冷媒流通経路２３Ｇに空気を流通させることで、冷却効果をさらに向上させることができる。 (5) In the configuration of the assembled battery 20, as described above, the heat generated in the battery 21 can be efficiently radiated to the outside through the heat transfer path, and is sealed in a limited space. Although it is particularly useful when installed, if a forced air blowing mechanism such as a fan is installed together with this, a cooling effect by air blowing is added, and the temperature rise is more effectively suppressed. can do. In this case, in particular, the cooling effect can be further improved by circulating air through the refrigerant flow path 23G of the bottom plate 23.

（６）上記組電池２０の構成においては、外装部材である底板２３に、複数の電池２１の積層方向に沿って延びる長孔２３Ｐが形成され、スペーサ２２の外側当接面部であるコ字形部材２４の下側片２４Ｄが、該長孔２３Ｐで底板２３に対し電池２１の積層方向にわずかに移動（遊動）し得るように仮ネジ止めされるようになっているが、長孔は、外側当接面部に形成するようにしてもよく、あるいは外側当接面部および外装部材の両者に形成するようにしてもよい。 (6) In the configuration of the assembled battery 20, a long plate 23 </ b> P that extends along the stacking direction of the plurality of batteries 21 is formed in the bottom plate 23 that is an exterior member, and a U-shaped member that is an outer contact surface portion of the spacer 22. 24 is temporarily screwed so that the lower piece 24D can be slightly moved (moved) in the stacking direction of the battery 21 with respect to the bottom plate 23 through the long hole 23P. You may make it form in a contact surface part, and you may make it form in both an outer side contact surface part and an exterior member.

（７）また、上記電池２０においては長孔２３Ｐが複数の電池２１の積層方向に沿ってやや長く延びるものとなっているが、長孔は、電池２１の加圧に必要なスペーサ２２の移動距離を確保し得る程度の長さを有していればよく、例えば、幅３．５ｍｍ、長さ４．５ｍｍ程度の寸法であってもよい。 (7) Further, in the battery 20, the long hole 23 </ b> P extends a little longer along the stacking direction of the plurality of batteries 21, but the long hole moves the spacer 22 necessary for pressurizing the battery 21. It is only necessary to have a length that can secure the distance. For example, the width may be about 3.5 mm and the length may be about 4.5 mm.

（８）上記組電池２０の構成においては、単電池（セル）である各電池２１の正極集電端子１５および負極集電端子１６が交互に配置されて電池２１が直列に接続されているが、各電池２１の正極集電端子１５および負極集電端子１６を同方向に配置して電池２１を並列に接続するようにしてもよい。 (8) In the configuration of the assembled battery 20, the positive electrode current collecting terminals 15 and the negative electrode current collecting terminals 16 of the batteries 21 that are single cells (cells) are alternately arranged and the batteries 21 are connected in series. The positive electrode current collecting terminal 15 and the negative electrode current collecting terminal 16 of each battery 21 may be arranged in the same direction so that the batteries 21 are connected in parallel.

（９）正極活物質としては、上記コバルト酸リチウムに限定されるものではなく、コバルト−ニッケル−マンガン、アルミニウム−ニッケル−マンガン、アルミニウム−ニッケル−コバルト等のコバルト、ニッケル或いはマンガンを含むリチウム複合酸化物や、スピネル型マンガン酸リチウム等でも構わない。 (9) The positive electrode active material is not limited to the above-described lithium cobalt oxide, and lithium composite oxide containing cobalt such as cobalt-nickel-manganese, aluminum-nickel-manganese, aluminum-nickel-cobalt, nickel, or manganese. Or a spinel type lithium manganate may be used.

（１０）負極活物質としては、天然黒鉛、人造黒鉛等の黒鉛以外にも、グラファイト・コークス・酸化スズ・金属リチウム・珪素・及びそれらの混合物等、リチウムイオンを挿入脱離できうるものであれば構わない。 (10) As the negative electrode active material, in addition to graphite such as natural graphite and artificial graphite, graphite, coke, tin oxide, lithium metal, silicon, and a mixture thereof can be used to insert and desorb lithium ions. It doesn't matter.

（１１）電解液としても特に本実施例で示したものに限定されるものではなく、リチウム塩としては例えばＬｉＢＦ４、ＬｉＰＦ６、ＬｉＮ（ＳＯ２ＣＦ３）２,ＬｉＮ（ＳＯ２Ｃ２Ｆ５）２，ＬｉＰＦ６―ｘ（ＣｎＦ２ｎ＋１）ｘ[但し、１＜ｘ＜６、ｎ＝１又は２]等が挙げられ、これらの１種もしくは２種以上を混合して使用できる。支持塩の濃度は特に限定されないが、電解液１リットル当り０．８〜１．８モルが望ましい。また、溶媒種としては上記ＥＣやＭＥＣ以外にも、プロピレンカーボネート（ＰＣ）、γ−ブチロラクトン（ＧＢＬ）、エチルメチルカーボネート（ＥＭＣ）、ジメチルカーボネート（ＤＭＣ）、ジエチルカーボネート（ＤＥＣ）等のカーボネート系溶媒が好ましく、更に好ましくは環状カーボネートと鎖状カーボネートの組合せが望ましい。 (11) The electrolyte solution is not particularly limited to that shown in the present embodiment, and examples of the lithium salt include LiBF 4 , LiPF 6 , LiN (SO 2 CF 3 ) 2 , LiN (SO 2 C 2 F). 5 ) 2 , LiPF 6-x (C n F 2n + 1 ) x [where 1 <x <6, n = 1 or 2] and the like can be used, and one or more of these can be used in combination. The concentration of the supporting salt is not particularly limited, but is preferably 0.8 to 1.8 mol per liter of the electrolyte. In addition to the above EC and MEC, the solvent species include carbonate solvents such as propylene carbonate (PC), γ-butyrolactone (GBL), ethyl methyl carbonate (EMC), dimethyl carbonate (DMC), and diethyl carbonate (DEC). More preferably, a combination of a cyclic carbonate and a chain carbonate is desirable.

本発明は、例えばロボットや小型動力のモバイル機器等に搭載される動力用などの高出力用途の電源に好適に適用することができる。   The present invention can be suitably applied to a power source for high output use such as for power mounted on a robot, a small power mobile device, or the like.

２０ 組電池
２１ 単電池
２２ スペーサ
２２Ｔ 金属板（伝熱部）
２２Ｍ 断熱シート（断熱部）
２３ 底板（外装部材）
２４ コ字形部材
２４Ｄ 下側片（外側当接面部）
２４Ｐ 上側片（内側当接面部） 20 assembled battery 21 single cell 22 spacer 22T metal plate (heat transfer part)
22M heat insulation sheet (heat insulation part)
23 Bottom plate (exterior material)
24 U-shaped member 24D Lower piece (outer contact surface)
24P Upper piece (inner contact surface)

Claims (7)

積層された複数の電池と、
電池の積層方向に沿って延びると共に、熱伝導性を有する外装部材と、
断熱性を有する断熱部と、断熱部の両側に配置され熱伝導性を有する伝熱部と、伝熱部に連結された外側当接面部とを有するスペーサと、
を備え、
伝熱部が電池間に介挿されて電池の表面に面的に当接するとともに、外側当接面部が外装部材に面的に当接していることを特徴とする組電池。 A plurality of stacked batteries;
An exterior member extending along the battery stacking direction and having thermal conductivity;
A spacer having a heat insulating portion having heat insulating properties, a heat transfer portion disposed on both sides of the heat insulating portion and having heat conductivity, and an outer contact surface portion connected to the heat transfer portion;
With
An assembled battery, wherein the heat transfer portion is interposed between the batteries so as to be in surface contact with the surface of the battery, and the outer contact surface portion is in surface contact with the exterior member. 前記スペーサが伝熱部に連結された内側当接面部を備え、
内側当接面部が電池の側端面に面的に当接している、請求項１に記載の組電池。 The spacer includes an inner contact surface portion connected to the heat transfer portion,
The assembled battery according to claim 1, wherein the inner contact surface portion is in surface contact with the side end surface of the battery. 前記スペーサが、中央片と両側片とからなる断面コ字形状の部材を有し、中央片が伝熱部に連結されると共に、各両側片が外側当接面部と内側当接面部とを構成している、請求項２に記載の組電池。   The spacer has a U-shaped member composed of a center piece and both side pieces, the center piece is connected to the heat transfer portion, and each side piece forms an outer contact surface portion and an inner contact surface portion. The assembled battery according to claim 2. 前記外装部材に、冷媒を流通させ得る冷媒流通経路が形成されている、請求項１から請求項３のいずれかに記載の組電池。   The assembled battery according to any one of claims 1 to 3, wherein a refrigerant flow path through which a refrigerant can flow is formed in the exterior member. 前記複数の電池を、該電池の積層方向に沿って両側から挟むようにして熱伝導性を有する加圧板が配置され、該加圧板に、断熱性を有する断熱部が形成されている、請求項１から請求項４のいずれかに記載の組電池。   A pressure plate having thermal conductivity is disposed so as to sandwich the plurality of batteries from both sides along the stacking direction of the batteries, and a heat insulating portion having heat insulation is formed on the pressure plate. The assembled battery according to claim 4. 前記スペーサの内側当接面部と前記外装部材との間に、制御基板を配置する基板配置部が形成されている、請求項２から請求項５のいずれかに記載の組電池。   The assembled battery according to any one of claims 2 to 5, wherein a substrate placement portion for placing a control substrate is formed between an inner contact surface portion of the spacer and the exterior member. 前記スペーサの外側当接面部または外装部材に、前記複数の電池の積層方向に沿って延びる長孔が形成され、該長孔で前記外側当接面部が前記外装部材にネジまたはボルトにより接合されている、請求項１から請求項６のいずれかに記載の組電池。   A long hole extending in the stacking direction of the plurality of batteries is formed in the outer contact surface portion or the exterior member of the spacer, and the outer contact surface portion is joined to the exterior member by a screw or a bolt through the long hole. The assembled battery according to any one of claims 1 to 6.
JP2009060641A 2009-03-13 2009-03-13 Battery pack Withdrawn JP2010218716A (en)

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WO2013061869A1 (en) * 2011-10-26 2013-05-02 住友重機械工業株式会社 Shovel
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WO2012057322A1 (en) * 2010-10-30 2012-05-03 三洋電機株式会社 Battery and vehicle using same
JP2012123997A (en) * 2010-12-08 2012-06-28 Sumitomo Heavy Ind Ltd Power storage module and working machine
WO2012172829A1 (en) * 2011-06-16 2012-12-20 日産自動車株式会社 Assembled cell
WO2013061869A1 (en) * 2011-10-26 2013-05-02 住友重機械工業株式会社 Shovel
US9945098B2 (en) 2011-10-26 2018-04-17 Sumitomo Heavy Industries, Ltd. Shovel including power storage device with housing having coolant flow path
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JPWO2013061869A1 (en) * 2011-10-26 2015-04-02 住友重機械工業株式会社 Excavator
JP2014534597A (en) * 2012-01-26 2014-12-18 エルジー・ケム・リミテッド Battery module with new structure
US10020549B2 (en) 2012-01-26 2018-07-10 Lg Chem, Ltd. Battery module with novel structure
WO2013118874A1 (en) * 2012-02-10 2013-08-15 住友重機械工業株式会社 Shovel
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CN104067407B (en) * 2012-02-10 2016-08-24 住友重机械工业株式会社 Excavator
WO2014010395A1 (en) * 2012-07-13 2014-01-16 日産自動車株式会社 Cell structure
WO2014057754A1 (en) * 2012-10-10 2014-04-17 株式会社オートネットワーク技術研究所 Power storage module
JP2015211013A (en) * 2014-04-30 2015-11-24 株式会社Ｇｓユアサ Power storage device
JP2017103158A (en) * 2015-12-03 2017-06-08 株式会社豊田自動織機 Battery pack
FR3070144A1 (en) * 2017-08-16 2019-02-22 Psa Automobiles Sa STORAGE SYSTEM FOR A HYBRID VEHICLE HAVING TWO POSITIONS FOR FASTENING THE CONNECTION BARS
CN111492503A (en) * 2017-12-19 2020-08-04 三洋电机株式会社 Power supply device and separator for power supply device
WO2020129274A1 (en) * 2018-12-21 2020-06-25 阿波製紙株式会社 Power source device and thermal insulation sheet for power source device
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