JP2021086661A - Power storage device - Google Patents

Power storage device Download PDF

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JP2021086661A
JP2021086661A JP2019212535A JP2019212535A JP2021086661A JP 2021086661 A JP2021086661 A JP 2021086661A JP 2019212535 A JP2019212535 A JP 2019212535A JP 2019212535 A JP2019212535 A JP 2019212535A JP 2021086661 A JP2021086661 A JP 2021086661A
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current collector
collector plate
power storage
electrode current
positive electrode
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泰有 秋山
Yasunari Akiyama
泰有 秋山
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Toyota Industries Corp
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Toyota Industries Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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Abstract

To provide a power storage device in which a heat exchanger, a first collector plate, and a second collector plate are unlikely to be misaligned with each other in a direction crossing a power storage module stacking direction.SOLUTION: A power storage device 1 comprises: a first power storage module 11a and a second power storage module 11b that are stacked in a direction Z; a heat exchanger 30, positioned between the first power storage module 11a and the second power storage module 11b in the direction Z, for performing heat exchange with the first power storage module 11a and the second power storage module 11b; a cathode collector plate 12p positioned between the first power storage module 11a and the heat exchanger 30 in the direction Z and electrically connected to the first power storage module 11a; and a cathode collector plate 12 positioned at least partially between the second power storage module 11b and the heat exchanger 30 in the direction Z and electrically connected to the second power storage module 11b. The heat exchanger 30, the cathode collector plate 12p, and the cathode collector plate 12 are positioned with each other in a direction X.SELECTED DRAWING: Figure 1

Description

本開示は、蓄電装置に関する。 The present disclosure relates to a power storage device.

積層された複数のバイポーラ電池間に設けられた集電体を備える電池ユニットが知られている（例えば特許文献１）。この電池ユニットでは、集電体が、バイポーラ電池で発生した熱を放出するための放熱部材として機能する。 A battery unit including a current collector provided between a plurality of stacked bipolar batteries is known (for example, Patent Document 1). In this battery unit, the current collector functions as a heat radiating member for releasing the heat generated by the bipolar battery.

特開２００９−１１７１０５号公報JP-A-2009-117105

放熱部材が、２つの集電板によって挟まれた熱交換器からなる場合、例えば振動等が電池ユニットに加えられることによって、バイポーラ電池の積層方向に交差する方向において、２つの集電板及び熱交換器の位置が、互いにずれるおそれがある。 When the heat radiating member consists of a heat exchanger sandwiched between two current collector plates, for example, when vibration or the like is applied to the battery unit, the two current collector plates and heat are crossed in the stacking direction of the bipolar batteries. The positions of the exchangers may shift from each other.

本開示は、蓄電モジュールの積層方向に交差する方向において熱交換器、第１集電板及び第２集電板の位置が互いにずれ難い蓄電装置を提供する。 The present disclosure provides a power storage device in which the positions of the heat exchanger, the first current collector plate, and the second current collector plate are not easily displaced from each other in the direction intersecting the stacking direction of the power storage modules.

本開示の一側面に係る蓄電装置は、第１方向において積層された第１蓄電モジュール及び第２蓄電モジュールと、前記第１方向において前記第１蓄電モジュールと前記第２蓄電モジュールとの間に少なくとも部分的に配置され、前記第１蓄電モジュール及び前記第２蓄電モジュールと熱交換を行うための熱交換器と、前記第１方向において前記第１蓄電モジュールと前記熱交換器との間に少なくとも部分的に配置され、前記第１蓄電モジュールと電気的に接続された第１集電板と、前記第１方向において前記第２蓄電モジュールと前記熱交換器との間に少なくとも部分的に配置され、前記第２蓄電モジュールと電気的に接続された第２集電板と、を備え、前記熱交換器、前記第１集電板及び前記第２集電板が、前記第１方向に交差する第２方向において互いに位置決めされている。 The power storage device according to one aspect of the present disclosure is at least between the first power storage module and the second power storage module stacked in the first direction and the first power storage module and the second power storage module in the first direction. A heat exchanger that is partially arranged and for exchanging heat with the first power storage module and the second power storage module, and at least a portion between the first power storage module and the heat exchanger in the first direction. A first collector plate electrically connected to the first power storage module and at least partially placed between the second power storage module and the heat exchanger in the first direction. A second collector plate electrically connected to the second power storage module is provided, and the heat exchanger, the first current collector plate, and the second current collector plate intersect in the first direction. They are positioned relative to each other in two directions.

上記蓄電装置によれば、熱交換器、第１集電板及び第２集電板が第２方向において互いに位置決めされているので、例えば振動が蓄電装置に加えられても、第２方向において熱交換器、第１集電板及び第２集電板の位置が互いにずれ難い。 According to the above-mentioned current collector, since the heat exchanger, the first current collector plate and the second current collector plate are positioned with each other in the second direction, for example, even if vibration is applied to the current collector, heat is generated in the second direction. The positions of the exchanger, the first current collector plate and the second current collector plate are unlikely to shift from each other.

前記熱交換器、前記第１集電板及び前記第２集電板のうち少なくとも１つが、前記熱交換器、前記第１集電板及び前記第２集電板を前記第２方向において互いに位置決めするための位置決め部を有してもよい。この場合、位置決め部によって、熱交換器、第１集電板及び第２集電板を第２方向において互いに位置決めできる。 At least one of the heat exchanger, the first current collector plate and the second current collector plate positions the heat exchanger, the first current collector plate and the second current collector plate with each other in the second direction. It may have a positioning unit for the purpose. In this case, the positioning unit can position the heat exchanger, the first current collector plate, and the second current collector plate with each other in the second direction.

前記第１集電板が、前記第１蓄電モジュールの第１電極と電気的に接続される本体部を有し、前記第２集電板が、前記第２蓄電モジュールの第２電極と電気的に接続される本体部を有し、前記第２電極は前記第１電極とは異なる極性を有し、前記第１方向から見て、前記熱交換器の端部が、前記第１集電板の前記本体部の縁及び前記第２集電板の前記本体部の縁の少なくとも一方よりも前記蓄電装置の外側に突出してもよい。この場合、熱交換器によって、第１集電板と第２集電板との間の短絡を抑制することができる。 The first current collector plate has a main body portion that is electrically connected to the first electrode of the first power storage module, and the second current collector plate is electrically connected to the second electrode of the second power storage module. The second electrode has a polarity different from that of the first electrode, and the end of the heat exchanger is the first current collector plate when viewed from the first direction. It may protrude to the outside of the power storage device from at least one of the edge of the main body and the edge of the main body of the second current collector. In this case, the heat exchanger can suppress a short circuit between the first current collector plate and the second current collector plate.

上記蓄電装置が、前記熱交換器、前記第１集電板及び前記第２集電板が、前記第１方向において互いに保持されるように、前記第１集電板及び前記第２集電板を挟む挟持部材を更に備えてもよい。この場合、挟持部材によって、熱交換器、第１集電板及び第２集電板を第１方向において互いに保持できる。 The first collector plate and the second current collector plate so that the power storage device holds the heat exchanger, the first current collector plate, and the second current collector plate with each other in the first direction. A holding member for sandwiching the above may be further provided. In this case, the sandwiching member can hold the heat exchanger, the first current collector plate, and the second current collector plate together in the first direction.

前記第１集電板及び前記第２集電板が、前記第１集電板の端部と前記第２集電板の端部とを互いに連結する連結板と共に板状部材を構成してもよい。この場合、１つの板状部材を折り曲げることによって、第１集電板、第２集電板及び連結板を形成できる。また、連結板によって、熱交換器、第１集電板及び第２集電板を第１方向及び第２方向の両方において互いに位置決めできる。 Even if the first current collector plate and the second current collector plate form a plate-like member together with a connecting plate that connects the end portion of the first current collector plate and the end portion of the second current collector plate to each other. Good. In this case, the first current collector plate, the second current collector plate, and the connecting plate can be formed by bending one plate-shaped member. In addition, the connecting plate allows the heat exchanger, the first current collector plate, and the second current collector plate to be positioned with each other in both the first direction and the second direction.

前記熱交換器と前記第１集電板とが第１接着剤によって互いに接着されており、前記熱交換器と前記第２集電板とが第２接着剤によって互いに接着されてもよい。この場合、第１接着剤及び第２接着剤によって、熱交換器、第１集電板及び第２集電板を保持できる。 The heat exchanger and the first current collector plate may be adhered to each other by a first adhesive, and the heat exchanger and the second current collector plate may be adhered to each other by a second adhesive. In this case, the heat exchanger, the first current collector plate, and the second current collector plate can be held by the first adhesive and the second adhesive.

本開示によれば、蓄電モジュールの積層方向に交差する方向において熱交換器、第１集電板及び第２集電板の位置が互いにずれ難い蓄電装置が提供され得る。 According to the present disclosure, it is possible to provide a power storage device in which the positions of the heat exchanger, the first current collector plate and the second current collector plate are not easily displaced from each other in the direction intersecting the stacking direction of the power storage modules.

図１は、一実施形態に係る蓄電装置を示す概略側面図である。FIG. 1 is a schematic side view showing a power storage device according to an embodiment. 図２は、図１の蓄電装置に含まれる蓄電モジュールの概略断面図である。FIG. 2 is a schematic cross-sectional view of the power storage module included in the power storage device of FIG. 図３は、変形例に係るユニットを模式的に示す図である。FIG. 3 is a diagram schematically showing a unit according to a modified example. 図４（ａ）及び（ｂ）は、他の変形例に係るユニットを模式的に示す図である。4 (a) and 4 (b) are diagrams schematically showing units according to other modified examples. 図５は、他の実施形態に係る蓄電装置を示す概略側面図である。FIG. 5 is a schematic side view showing a power storage device according to another embodiment. 図６は、他の変形例に係るユニットを模式的に示す図である。FIG. 6 is a diagram schematically showing a unit according to another modification. 図７は、他の変形例に係るユニットを模式的に示す図である。FIG. 7 is a diagram schematically showing a unit according to another modification. 図８は、他の実施形態に係る蓄電装置を示す概略側面図である。FIG. 8 is a schematic side view showing a power storage device according to another embodiment. 図９は、他の変形例に係るユニットを模式的に示す図である。FIG. 9 is a diagram schematically showing a unit according to another modification. 図１０は、他の変形例に係るユニットを模式的に示す図である。FIG. 10 is a diagram schematically showing a unit according to another modification.

以下、添付図面を参照しながら本開示の実施形態が詳細に説明される。図面の説明において、同一又は同等の要素には同一符号が用いられ、重複する説明は省略される。 Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same reference numerals are used for the same or equivalent elements, and duplicate description is omitted.

図１に示される蓄電装置１は、例えば、フォークリフト、ハイブリッド自動車、電気自動車等の各種車両のバッテリとして用いられる蓄電モジュールである。蓄電装置１は、モジュールスタック（配列体）２と、モジュールスタック２に電気的に接続される接続部材３，４と、モジュールスタック２を拘束する一対の拘束部材５，５と、モジュールスタック２と拘束部材５との間に配置される絶縁部材７，７と、を備える。以下では、拘束部材５，５がモジュールスタック２を拘束する方向を方向Ｚ（第１方向）とし、方向Ｚと交差（例えば直交）する方向を方向Ｘ（第２方向）とし、方向Ｚ及び方向Ｘと交差（例えば直交）する方向を方向Ｙ（第２方向）とする。方向Ｘ及び方向Ｙは例えば水平方向である。 The power storage device 1 shown in FIG. 1 is a power storage module used as a battery for various vehicles such as forklifts, hybrid vehicles, and electric vehicles. The power storage device 1 includes a module stack (array) 2, connecting members 3 and 4 electrically connected to the module stack 2, a pair of restraining members 5 and 5 for restraining the module stack 2, and a module stack 2. Insulating members 7 and 7 arranged between the restraining member 5 and the insulating members 7 and 7 are provided. In the following, the direction in which the restraint members 5 and 5 restrain the module stack 2 is defined as the direction Z (first direction), and the direction intersecting (for example, orthogonal to) the direction Z is defined as the direction X (second direction). The direction that intersects (for example, orthogonal to) X is defined as the direction Y (second direction). The direction X and the direction Y are, for example, horizontal directions.

モジュールスタック２は、方向Ｚにおいて積層された複数の蓄電モジュールを備える。複数の蓄電モジュールは、第１蓄電モジュール１１ａ及び第２蓄電モジュール１１ｂを含む。第２蓄電モジュール１１ｂは、第１蓄電モジュール１１ａと同じ構成を有している。第１蓄電モジュール１１ａの詳細な構成については後述する。モジュールスタック２は、方向Ｚにおいて第１蓄電モジュール１１ａと第２蓄電モジュール１１ｂとの間に少なくとも部分的に配置されたユニットＵ１とを備える。第１蓄電モジュール１１ａ及び第２蓄電モジュール１１ｂは、方向Ｚから見て例えば略矩形状を呈する。 The module stack 2 includes a plurality of power storage modules stacked in the direction Z. The plurality of power storage modules include a first power storage module 11a and a second power storage module 11b. The second power storage module 11b has the same configuration as the first power storage module 11a. The detailed configuration of the first power storage module 11a will be described later. The module stack 2 includes a unit U1 that is at least partially arranged between the first power storage module 11a and the second power storage module 11b in the direction Z. The first power storage module 11a and the second power storage module 11b have, for example, a substantially rectangular shape when viewed from the direction Z.

ユニットＵ１は、熱交換器３０と、方向Ｚにおいて第１蓄電モジュール１１ａと熱交換器３０との間に配置された正極集電板１２ｐ（第１集電板）と、方向Ｚにおいて第２蓄電モジュール１１ｂと熱交換器３０との間に少なくとも部分的に配置された正極集電板１２（第２集電板）とを備える。正極集電板１２ｐは、第１蓄電モジュール１１ａに電気的に接続される。正極集電板１２は、第２蓄電モジュール１１ｂに電気的に接続される。本実施形態では、正極集電板１２の本体部１２ａが方向Ｚにおいて第２蓄電モジュール１１ｂと熱交換器３０との間に配置される。 The unit U1 includes a heat exchanger 30, a positive electrode current collector plate 12p (first current collector plate) arranged between the first storage module 11a and the heat exchanger 30 in the direction Z, and a second storage plate in the direction Z. It includes a positive electrode current collector plate 12 (second current collector plate) that is at least partially arranged between the module 11b and the heat exchanger 30. The positive electrode current collector plate 12p is electrically connected to the first power storage module 11a. The positive electrode current collector plate 12 is electrically connected to the second power storage module 11b. In the present embodiment, the main body 12a of the positive electrode current collector plate 12 is arranged between the second power storage module 11b and the heat exchanger 30 in the direction Z.

熱交換器３０は、正極集電板１２ｐを介して第１蓄電モジュール１１ａと熱交換を行い、正極集電板１２を介して第２蓄電モジュール１１ｂと熱交換を行う。熱交換器３０は、例えば第１蓄電モジュール１１ａ及び第２蓄電モジュール１１ｂにおいて発生した熱を蓄電装置１の外部に放出する放熱板である。熱交換器３０は、方向Ｚから見て略矩形状を呈する。熱交換器３０は、例えば水、油、空気等の冷却用流体が通る流路３２を有している。流路３２は、方向Ｚに交差する方向（例えば、方向Ｘ又は方向Ｙ）に貫通する複数の貫通孔であってもよい。本実施形態では、流路３２は、方向Ｙに貫通する貫通孔である。熱交換器３０が導電性を有している場合、冷却用流体は絶縁性の流体（例えば空気、油等）である。熱交換器３０が絶縁性を有している場合、冷却用流体は、絶縁性の流体であってもよいし、導電性の流体であってもよい。絶縁性の熱交換器３０は、例えば絶縁部材から形成されてもよいし、導電部材の表面に絶縁層が設けられた部材から形成されてもよい。 The heat exchanger 30 exchanges heat with the first electricity storage module 11a via the positive electrode current collector plate 12p, and exchanges heat with the second electricity storage module 11b via the positive electrode current collector plate 12. The heat exchanger 30 is, for example, a heat sink that discharges the heat generated in the first power storage module 11a and the second power storage module 11b to the outside of the power storage device 1. The heat exchanger 30 has a substantially rectangular shape when viewed from the direction Z. The heat exchanger 30 has a flow path 32 through which a cooling fluid such as water, oil, or air passes. The flow path 32 may be a plurality of through holes penetrating in a direction intersecting the direction Z (for example, the direction X or the direction Y). In the present embodiment, the flow path 32 is a through hole penetrating in the direction Y. When the heat exchanger 30 is conductive, the cooling fluid is an insulating fluid (eg, air, oil, etc.). When the heat exchanger 30 has an insulating property, the cooling fluid may be an insulating fluid or a conductive fluid. The insulating heat exchanger 30 may be formed of, for example, an insulating member, or may be formed of a member provided with an insulating layer on the surface of the conductive member.

本実施形態では、正極集電板１２ｐ及び正極集電板１２が、正極集電板１２ｐの端部１２ｐｅと正極集電板１２の端部１２ｅとを互いに連結する連結板３４と共に板状部材３５を構成する。連結板３４は方向Ｚ及び方向Ｙに延在する導電板である。すなわち、正極集電板１２ｐ、正極集電板１２及び連結板３４は、１つの板状部材３５を方向Ｙから見てＵ字状に折り曲げることによって形成されている。よって、熱交換器３０は、正極集電板１２ｐ、正極集電板１２及び連結板３４によって囲まれる。これにより、方向Ｘ及び方向Ｚにおける熱交換器３０の移動を規制できる。ただし、方向Ｘのうち連結板３４に向かう方向への熱交換器３０の移動は規制されるが、方向Ｘのうち連結板３４から離れる方向への熱交換器３０の移動は規制されない。このようにして、熱交換器３０、正極集電板１２ｐ及び正極集電板１２は、方向Ｘ及び方向Ｚの両方において互いに位置決めされる。また、１つの板状部材３５を折り曲げることによって、正極集電板１２ｐ、正極集電板１２及び連結板３４を形成する場合、正極集電板１２ｐ、正極集電板１２及び連結板３４を容易に製造できる。 In the present embodiment, the positive electrode current collector plate 12p and the positive electrode current collector plate 12 are plate-shaped members 35 together with a connecting plate 34 that connects the end portion 12pe of the positive electrode current collector plate 12p and the end portion 12e of the positive electrode current collector plate 12 to each other. To configure. The connecting plate 34 is a conductive plate extending in the direction Z and the direction Y. That is, the positive electrode current collector plate 12p, the positive electrode current collector plate 12, and the connecting plate 34 are formed by bending one plate-shaped member 35 into a U shape when viewed from the direction Y. Therefore, the heat exchanger 30 is surrounded by the positive electrode current collector plate 12p, the positive electrode current collector plate 12, and the connecting plate 34. Thereby, the movement of the heat exchanger 30 in the direction X and the direction Z can be regulated. However, the movement of the heat exchanger 30 in the direction X toward the connecting plate 34 is restricted, but the movement of the heat exchanger 30 in the direction X away from the connecting plate 34 is not restricted. In this way, the heat exchanger 30, the positive electrode current collector plate 12p and the positive electrode current collector plate 12 are positioned with each other in both the direction X and the direction Z. Further, when the positive electrode current collector plate 12p, the positive electrode current collector plate 12 and the connecting plate 34 are formed by bending one plate-shaped member 35, the positive electrode current collecting plate 12p, the positive electrode current collecting plate 12 and the connecting plate 34 can be easily formed. Can be manufactured.

モジュールスタック２は、複数の負極集電板１３，１３及び複数の熱交換器３０，３０を更に備える。第１負極集電板１３は、第１蓄電モジュール１１ａと第１絶縁部材７との間に少なくとも部分的に配置され、第１蓄電モジュール１１ａに電気的に接続される。第１熱交換器３０は、第１負極集電板１３と第１絶縁部材７との間に配置され、第１負極集電板１３を介して第１蓄電モジュール１１ａと熱交換を行う。第２負極集電板１３は、第２蓄電モジュール１１ｂと第２絶縁部材７との間に少なくとも部分的に配置され、第２蓄電モジュール１１ｂに電気的に接続される。第２熱交換器３０は、第２負極集電板１３と第２絶縁部材７との間に配置され、第２負極集電板１３を介して第２蓄電モジュール１１ｂと熱交換を行う。本実施形態では、全て（３つ）の熱交換器３０の流路３２に共通の冷却用流体が流れる。 The module stack 2 further includes a plurality of negative electrode current collector plates 13, 13 and a plurality of heat exchangers 30, 30. The first negative electrode current collector plate 13 is at least partially arranged between the first power storage module 11a and the first insulating member 7, and is electrically connected to the first power storage module 11a. The first heat exchanger 30 is arranged between the first negative electrode current collector plate 13 and the first insulating member 7, and exchanges heat with the first power storage module 11a via the first negative electrode current collector plate 13. The second negative electrode current collector plate 13 is at least partially arranged between the second power storage module 11b and the second insulating member 7, and is electrically connected to the second power storage module 11b. The second heat exchanger 30 is arranged between the second negative electrode current collector plate 13 and the second insulating member 7, and exchanges heat with the second power storage module 11b via the second negative electrode current collector plate 13. In this embodiment, a common cooling fluid flows through the flow paths 32 of all (three) heat exchangers 30.

接続部材３は、蓄電装置１の正極として機能する導電部材（バスバー）である。接続部材３は、方向Ｚに沿って設けられている。接続部材３は、例えば、金属板である。金属板は、例えば、銅板、アルミニウム板、チタン板、もしくはニッケル板である。金属板は、例えばステンレス鋼板（ＳＵＳ３０１、ＳＵＳ３０４等）であってもよいし、銅、アルミニウム、チタン及びニッケルからなる群から選ばれる２種以上の金属を含む合金板であってもよい。接続部材３は、モジュールスタック２に含まれる正極集電板１２ｐ及び正極集電板１２に電気的に接続されている。 The connecting member 3 is a conductive member (bus bar) that functions as a positive electrode of the power storage device 1. The connecting member 3 is provided along the direction Z. The connecting member 3 is, for example, a metal plate. The metal plate is, for example, a copper plate, an aluminum plate, a titanium plate, or a nickel plate. The metal plate may be, for example, a stainless steel plate (SUS301, SUS304, etc.) or an alloy plate containing two or more metals selected from the group consisting of copper, aluminum, titanium and nickel. The connecting member 3 is electrically connected to the positive electrode current collector plate 12p and the positive electrode current collector plate 12 included in the module stack 2.

接続部材４は、蓄電装置１の負極として機能する導電部材（バスバー）である。接続部材４は、方向Ｚに沿って設けられている。接続部材４は、接続部材３と同様に、例えば、金属板である。接続部材４は、接続部材３と同一の金属板であってもよいし、異なる金属板であってもよい。接続部材４は、モジュールスタック２に含まれる第１負極集電板１３及び第２負極集電板１３に電気的に接続されている。 The connecting member 4 is a conductive member (bus bar) that functions as a negative electrode of the power storage device 1. The connecting member 4 is provided along the direction Z. Like the connecting member 3, the connecting member 4 is, for example, a metal plate. The connecting member 4 may be the same metal plate as the connecting member 3, or may be a different metal plate. The connecting member 4 is electrically connected to the first negative electrode current collector plate 13 and the second negative electrode current collector plate 13 included in the module stack 2.

第１蓄電モジュール１１ａは、方向Ｚにおいて正極集電板１２ｐと第１負極集電板１３とによって挟まれており、正極集電板１２ｐ、連結板３４及び正極集電板１２を介して接続部材３に電気的に接続されると共に、第１負極集電板１３を介して接続部材４に電気的に接続される。第２蓄電モジュール１１ｂは、方向Ｚにおいて正極集電板１２と第２負極集電板１３とによって挟まれており、正極集電板１２を介して接続部材３に電気的に接続されると共に、第２負極集電板１３を介して接続部材４に電気的に接続される。 The first power storage module 11a is sandwiched between the positive electrode current collector plate 12p and the first negative electrode current collector plate 13 in the direction Z, and is a connecting member via the positive electrode current collector plate 12p, the connecting plate 34, and the positive electrode current collecting plate 12. It is electrically connected to No. 3 and is also electrically connected to the connecting member 4 via the first negative electrode current collector plate 13. The second power storage module 11b is sandwiched between the positive electrode current collector plate 12 and the second negative electrode current collector plate 13 in the direction Z, and is electrically connected to the connecting member 3 via the positive electrode current collector plate 12 and is also electrically connected. It is electrically connected to the connecting member 4 via the second negative electrode current collector plate 13.

拘束部材５，５のそれぞれは、モジュールスタック２に対して方向Ｚに沿った拘束力（荷重）を付加する部材である。拘束部材５，５のそれぞれは、導電性の金属材料（例えば、銅、アルミニウム、チタン、ニッケル、又はステンレス鋼等の合金）から形成されている。拘束部材５，５は、例えば、締結部材（例えば、ボルト６Ａ及びナット６Ｂ）等を用いた連結部材６を介して互いに連結されてもよい。この場合、拘束部材５，５のそれぞれには、方向Ｚに沿って延在するボルト等の連結部材が挿通される貫通孔等が設けられてもよい。 Each of the restraint members 5 and 5 is a member that applies a restraining force (load) along the direction Z to the module stack 2. Each of the restraint members 5 and 5 is formed of a conductive metal material (for example, an alloy such as copper, aluminum, titanium, nickel, or stainless steel). The restraining members 5 and 5 may be connected to each other via a connecting member 6 using, for example, a fastening member (for example, a bolt 6A and a nut 6B). In this case, each of the restraint members 5 and 5 may be provided with a through hole or the like through which a connecting member such as a bolt extending along the direction Z is inserted.

図１に示される絶縁部材７，７のそれぞれは、シート状の絶縁部材であり、略直方体形状を呈している。絶縁部材７，７のそれぞれは、方向Ｚにおいてモジュールスタック２と拘束部材５との間に配置されている。絶縁部材７のそれぞれは、熱交換器３０に接触する。 Each of the insulating members 7 and 7 shown in FIG. 1 is a sheet-shaped insulating member and has a substantially rectangular parallelepiped shape. Each of the insulating members 7 and 7 is arranged between the module stack 2 and the restraining member 5 in the direction Z. Each of the insulating members 7 comes into contact with the heat exchanger 30.

絶縁部材７，７のそれぞれを形成する材料の例には、例えば、ポリプロピレン（ＰＰ）、ポリフェニレンサルファイド（ＰＰＳ）、ナイロン６６（ＰＡ６６）が含まれる。絶縁部材７，７の少なくとも一つは、弾性を示してもよい。絶縁部材７，７の方向Ｚに沿った長さ（厚み）は、例えば、１ｍｍ以上１０ｍｍ以下である。 Examples of materials forming each of the insulating members 7 and 7 include, for example, polypropylene (PP), polyphenylene sulfide (PPS), and nylon 66 (PA66). At least one of the insulating members 7 and 7 may exhibit elasticity. The length (thickness) of the insulating members 7 and 7 along the direction Z is, for example, 1 mm or more and 10 mm or less.

次に、図２を参照しながら、モジュールスタック２に含まれる第１蓄電モジュール１１ａの詳細について説明する。図２に示されるように、第１蓄電モジュール１１ａは、方向Ｚに積層された複数の単電池を含む。第１蓄電モジュール１１ａは、略直方体形状を呈する。第１蓄電モジュール１１ａは、例えば、ニッケル水素二次電池、リチウムイオン二次電池等の二次電池である。第１蓄電モジュール１１ａは、電気二重層キャパシタでもよい。第１蓄電モジュール１１ａは、全固体電池でもよい。本実施形態の第１蓄電モジュール１１ａは、バイポーラ型のリチウムイオン二次電池である。 Next, the details of the first power storage module 11a included in the module stack 2 will be described with reference to FIG. As shown in FIG. 2, the first power storage module 11a includes a plurality of cells stacked in the direction Z. The first power storage module 11a exhibits a substantially rectangular parallelepiped shape. The first power storage module 11a is, for example, a secondary battery such as a nickel hydrogen secondary battery or a lithium ion secondary battery. The first power storage module 11a may be an electric double layer capacitor. The first power storage module 11a may be an all-solid-state battery. The first power storage module 11a of the present embodiment is a bipolar lithium ion secondary battery.

第１蓄電モジュール１１ａは、積層体１４と、封止部材１５と、を備える。積層体１４は、複数のバイポーラ電極（電極）１６と複数のセパレータ１７とを含む電極群１１４と、正極終端電極（終端電極）１８と、負極終端電極（終端電極）１９と、を有する。複数のバイポーラ電極１６と、複数のセパレータ１７とは、方向Ｚに沿って交互に配置されている。積層体１４は、方向Ｚに交差する一対の主面２１ａ及び主面２１ｂをつなぐ外周面（側面）を有する。 The first power storage module 11a includes a laminated body 14 and a sealing member 15. The laminate 14 has an electrode group 114 including a plurality of bipolar electrodes (electrodes) 16 and a plurality of separators 17, a positive electrode terminal electrode (terminal electrode) 18, and a negative electrode terminal electrode (terminal electrode) 19. The plurality of bipolar electrodes 16 and the plurality of separators 17 are alternately arranged along the direction Z. The laminated body 14 has an outer peripheral surface (side surface) connecting a pair of main surfaces 21a and main surfaces 21b intersecting in the direction Z.

複数のバイポーラ電極１６のそれぞれは、電極体２１と、正極層２２と、負極層２３とを備える。電極体２１は、方向Ｚに交差する一対の主面２１ａ，２１ｂを有する。電極体２１の主面（一方の面）２１ａ上には正極層２２が設けられ、電極体２１の主面（他方の面）２１ｂ上には負極層２３が設けられる。このため、電極体２１は、方向Ｚに沿って正極層２２と負極層２３とによって挟まれている。 Each of the plurality of bipolar electrodes 16 includes an electrode body 21, a positive electrode layer 22, and a negative electrode layer 23. The electrode body 21 has a pair of main surfaces 21a and 21b that intersect in the direction Z. A positive electrode layer 22 is provided on the main surface (one surface) 21a of the electrode body 21, and a negative electrode layer 23 is provided on the main surface (the other surface) 21b of the electrode body 21. Therefore, the electrode body 21 is sandwiched between the positive electrode layer 22 and the negative electrode layer 23 along the direction Z.

電極体２１は、シート状の導電部材であり、略矩形状を呈している。電極体２１は、例えば、互いに異なる種類の金属を含む複数の金属箔が一体化された構造を有する。複数の金属箔は、互いに接合されている。各金属箔は、例えば、銅箔、アルミニウム箔、チタン箔、もしくはニッケル箔である。各金属箔は、例えば、ステンレス鋼箔（例えばＪＩＳ Ｇ ４３０５：２０１５にて規定されるＳＵＳ３０４、ＳＵＳ３１６、ＳＵＳ３０１、ＳＵＳ３０４等）、メッキ処理が施された鋼板（例えばＪＩＳ Ｇ ３１４１：２００５にて規定される冷間圧延鋼板（ＳＰＣＣ等））、又はメッキ処理が施されたステンレス鋼板であってもよいし、銅、アルミニウム、チタン及びニッケルからなる群から選ばれる２種以上の金属を含む合金箔であってもよい。機械的強度を確保する観点から、電極体２１はアルミニウム箔を含んでもよい。電極体２１がアルミニウム箔を含まない場合、金属箔の表面にはアルミニウムが被覆されていてもよい。電極体２１の厚みは、例えば、５μｍ以上７０μｍ以下である。 The electrode body 21 is a sheet-shaped conductive member and has a substantially rectangular shape. The electrode body 21 has, for example, a structure in which a plurality of metal foils containing different types of metals are integrated. A plurality of metal foils are joined to each other. Each metal foil is, for example, copper foil, aluminum foil, titanium foil, or nickel foil. Each metal foil is defined by, for example, a stainless steel foil (for example, SUS304, SUS316, SUS301, SUS304, etc. specified in JIS G 4305: 2015) and a plated steel sheet (for example, JIS G 3141: 2005). Cold-rolled steel sheet (SPCC, etc.)) or plated stainless steel sheet, or an alloy foil containing two or more metals selected from the group consisting of copper, aluminum, titanium and nickel. There may be. From the viewpoint of ensuring mechanical strength, the electrode body 21 may include aluminum foil. When the electrode body 21 does not contain the aluminum foil, the surface of the metal foil may be coated with aluminum. The thickness of the electrode body 21 is, for example, 5 μm or more and 70 μm or less.

正極層２２は、正極活物質と導電助剤と結着剤とを含む層状部材であり、略矩形状を呈している。本実施形態の正極活物質は、例えば、複合酸化物、金属リチウム、及び硫黄等である。複合酸化物の組成には、例えば、鉄、マンガン、チタン、ニッケル、コバルト、及びアルミニウムの少なくとも１つと、リチウムとが含まれる。複合酸化物の例には、オリビン型リン酸鉄リチウム（ＬｉＦｅＰＯ４）が挙げられる。結着剤は、活物質又は導電助剤を集電体の表面に繋ぎ止め、電極中の導電ネットワークを維持する役割を果たすものである。結着剤としては、ポリフッ化ビニリデン、ポリテトラフルオロエチレン、フッ素ゴム等の含フッ素樹脂、ポリプロピレン、ポリエチレン等の熱可塑性樹脂、ポリイミド、ポリアミドイミド等のイミド系樹脂、アルコキシシリル基含有樹脂、ポリ（メタ）アクリル酸等のアクリル系樹脂、スチレン−ブタジエンゴム（ＳＢＲ）、カルボキシメチルセルロース、アルギン酸ナトリウム、アルギン酸アンモニウム等のアルギン酸塩、水溶性セルロースエステル架橋体、デンプン−アクリル酸グラフト重合体を例示することができる。これらの結着剤を単独で又は複数で採用すれば良い。 The positive electrode layer 22 is a layered member containing a positive electrode active material, a conductive auxiliary agent, and a binder, and has a substantially rectangular shape. The positive electrode active material of the present embodiment is, for example, a composite oxide, metallic lithium, sulfur and the like. The composition of the composite oxide includes, for example, at least one of iron, manganese, titanium, nickel, cobalt, and aluminum, and lithium. Examples of composite oxides include olivine-type lithium iron phosphate (LiFePO 4 ). The binder serves to anchor the active material or conductive auxiliary agent to the surface of the current collector and maintain the conductive network in the electrodes. Examples of the binder include fluororesins such as polyvinylidene fluoride, polytetrafluoroethylene and fluororubber, thermoplastic resins such as polypropylene and polyethylene, imide resins such as polyimide and polyamideimide, alkoxysilyl group-containing resins and poly (). Examples of acrylic resins such as meta) acrylic acid, styrene-butadiene rubber (SBR), carboxymethyl cellulose, sodium alginate, alginates such as ammonium alginate, water-soluble cellulose ester crosslinked products, and starch-acrylic acid graft polymers can be exemplified. it can. These binders may be used alone or in combination of two or more.

導電助剤は、例えば、アセチレンブラック、カーボンブラック、グラファイト等である。粘度調整溶媒は、例えば、Ｎ−メチル−２−ピロリドン（ＮＭＰ）等である。 The conductive auxiliary agent is, for example, acetylene black, carbon black, graphite or the like. The viscosity adjusting solvent is, for example, N-methyl-2-pyrrolidone (NMP) or the like.

負極層２３は、負極活物質と導電助剤と結着剤とを含む層状部材であり、略矩形状を呈している。本実施形態の負極活物質は、例えば、黒鉛、人造黒鉛、高配向性グラファイト、メソカーボンマイクロビーズ、ハードカーボン、ソフトカーボン等のカーボン、金属化合物、リチウムと合金化可能な元素もしくはその化合物、ホウ素添加炭素等である。リチウムと合金化可能な元素の例としては、シリコン（ケイ素）及びスズが挙げられる。導電助剤及び結着剤は正極層２２と同様のものを用いることができる。 The negative electrode layer 23 is a layered member containing a negative electrode active material, a conductive auxiliary agent, and a binder, and has a substantially rectangular shape. The negative electrode active material of the present embodiment is, for example, carbon such as graphite, artificial graphite, highly oriented graphite, mesocarbon microbeads, hard carbon, soft carbon, a metal compound, an element that can be alloyed with lithium or a compound thereof, and boron. Addition carbon etc. Examples of elements that can be alloyed with lithium include silicon and tin. As the conductive auxiliary agent and the binder, the same ones as those of the positive electrode layer 22 can be used.

正極終端電極１８は、積層体１４の方向Ｚにおける一方の端部に設けられている。正極終端電極１８は、電極体２１の一方の主面２１ａにのみ上記の正極層（活物質）２２が塗工されて形成された電極である。すなわち、方向Ｚにおいて積層体１４の一端に配置される電極体２１の主面２１ｂ上には、負極層２３が配置されていない。 The positive electrode termination electrode 18 is provided at one end of the laminate 14 in the direction Z. The positive electrode terminal electrode 18 is an electrode formed by coating the positive electrode layer (active material) 22 only on one main surface 21a of the electrode body 21. That is, the negative electrode layer 23 is not arranged on the main surface 21b of the electrode body 21 arranged at one end of the laminated body 14 in the direction Z.

負極終端電極１９は、積層体１４の方向Ｚにおける他方の端部に設けられている。負極終端電極１９も、正極終端電極１８と同様に、電極体２１の一方の主面２１ｂにのみ負極層（活物質）２３が塗工されて形成された電極である。すなわち、方向Ｚにおいて積層体１４の他端に配置される電極体２１の主面２１ａ上には、正極層２２が配置されていない。 The negative electrode termination electrode 19 is provided at the other end of the laminate 14 in the direction Z. Similar to the positive electrode terminal electrode 18, the negative electrode terminal electrode 19 is also an electrode formed by coating the negative electrode layer (active material) 23 only on one main surface 21b of the electrode body 21. That is, the positive electrode layer 22 is not arranged on the main surface 21a of the electrode body 21 arranged at the other end of the laminated body 14 in the direction Z.

セパレータ１７は、隣り合うバイポーラ電極１６，１６の間、バイポーラ電極１６と正極終端電極１８との間、及びバイポーラ電極１６と負極終端電極１９との間のそれぞれを隔てる層状部材であり、略矩形状を呈している。セパレータ１７は、隣り合うバイポーラ電極１６，１６の間、バイポーラ電極１６と正極終端電極１８との間、及びバイポーラ電極１６と負極終端電極１９との間の短絡を防止する部材である。セパレータ１７は、正極層２２及び負極層２３に含まれる電解質によって構成されてもよい。セパレータ１７が固体電解質によって構成される場合、セパレータ１７は、略矩形板形状を呈してもよい。セパレータ１７の厚みは、例えば、１μｍ以上２０μｍ以下である。 The separator 17 is a layered member that separates the adjacent bipolar electrodes 16 and 16, between the bipolar electrode 16 and the positive electrode terminal electrode 18, and between the bipolar electrode 16 and the negative electrode terminal electrode 19, and has a substantially rectangular shape. Is presented. The separator 17 is a member that prevents a short circuit between the adjacent bipolar electrodes 16 and 16, between the bipolar electrode 16 and the positive electrode terminal electrode 18, and between the bipolar electrode 16 and the negative electrode terminal electrode 19. The separator 17 may be composed of the electrolyte contained in the positive electrode layer 22 and the negative electrode layer 23. When the separator 17 is composed of a solid electrolyte, the separator 17 may have a substantially rectangular plate shape. The thickness of the separator 17 is, for example, 1 μm or more and 20 μm or less.

セパレータ１７は、例えばポリエチレン（ＰＥ）、ポリプロピレン（ＰＰ）等のポリオレフィン系樹脂からなる多孔質フィルムである。セパレータ１７は、ポリプロピレン、メチルセルロース等からなる織布又は不織布等でもよい。セパレータ１７は、フッ化ビニリデン樹脂化合物で補強されてもよい。 The separator 17 is a porous film made of a polyolefin resin such as polyethylene (PE) or polypropylene (PP). The separator 17 may be a woven fabric or a non-woven fabric made of polypropylene, methyl cellulose or the like. The separator 17 may be reinforced with a vinylidene fluoride resin compound.

封止部材１５は、積層体１４に含まれる複数のバイポーラ電極１６、複数のセパレータ１７、正極終端電極１８、及び負極終端電極１９を保持する部材であり、絶縁性を有している。より詳細には、封止部材１５は、バイポーラ電極１６、正極終端電極１８、及び負極終端電極１９を構成する電極体２１を保持している。封止部材１５は、積層体１４の外周面（側面）を封止するように略矩形枠形状を呈する封止部材、及び、積層体１４内のバイポーラ電極１６同士の短絡を防止する短絡防止部材としても機能し得る。 The sealing member 15 is a member that holds a plurality of bipolar electrodes 16, a plurality of separators 17, a positive electrode terminal electrode 18, and a negative electrode terminal electrode 19 included in the laminated body 14, and has insulating properties. More specifically, the sealing member 15 holds the bipolar electrode 16, the positive electrode terminal electrode 18, and the electrode body 21 constituting the negative electrode terminal electrode 19. The sealing member 15 is a sealing member having a substantially rectangular frame shape so as to seal the outer peripheral surface (side surface) of the laminated body 14, and a short-circuit preventing member for preventing short circuits between the bipolar electrodes 16 in the laminated body 14. Can also function as.

封止部材１５を形成する材料の例には、耐熱性を示す樹脂部材等が含まれる。耐熱性を示す樹脂部材の例には、ポリイミド、ポリプロピレン（ＰＰ）、ポリフェニレンサルファイド（ＰＰＳ）、変性ポリフェニレンエーテル（変性ＰＰＥ）及びＰＡ６６等が含まれる。 Examples of the material forming the sealing member 15 include a resin member exhibiting heat resistance and the like. Examples of the resin member exhibiting heat resistance include polyimide, polypropylene (PP), polyphenylene sulfide (PPS), modified polyphenylene ether (modified PPE), PA66 and the like.

封止部材１５によって封止された空間Ｓには、図示しない電解液が収容されている。電解液の例としては、環状カーボネート、環状エステル、鎖状カーボネート、鎖状エステル、エーテル類等が使用できる。電解液に含まれる支持塩は、例えばリチウム塩である。リチウム塩は、例えば、ＬｉＢＦ４、ＬｉＰＦ６、ＬｉＮ（ＦＳＯ２）２、ＬｉＮ（ＳＯ２ＣＦ３）２、ＬｉＮ（ＳＯ２Ｃ２Ｆ５）２、もしくはこれらの混合物である。 An electrolytic solution (not shown) is housed in the space S sealed by the sealing member 15. Examples of the electrolytic solution include cyclic carbonates, cyclic esters, chain carbonates, chain esters, ethers and the like. The supporting salt contained in the electrolytic solution is, for example, a lithium salt. Lithium salts are, for example, LiBF 4 , LiPF 6 , LiN (FSO 2 ) 2 , LiN (SO 2 CF 3 ) 2 , LiN (SO 2 C2F 5 ) 2 , or a mixture thereof.

次に、図１及び図２を参照しながら、正極集電板１２ｐ、正極集電板１２及び負極集電板１３の構成についてより詳細に説明する。正極集電板１２ｐ、正極集電板１２及び負極集電板１３は、例えば、銅板、アルミニウム板、チタン板、もしくはニッケル板等の導電板である。正極集電板１２ｐは、第１蓄電モジュール１１ａの正極終端電極１８と電気的に接続される。正極集電板１２ｐは、方向Ｚから見てバイポーラ電極１６及びセパレータ１７に重なっており、略矩形状を呈している。正極集電板１２ｐの厚みは、例えば、１ｍｍ以上５ｍｍ以下である。 Next, the configurations of the positive electrode current collector plate 12p, the positive electrode current collector plate 12, and the negative electrode current collector plate 13 will be described in more detail with reference to FIGS. 1 and 2. The positive electrode current collector plate 12p, the positive electrode current collector plate 12, and the negative electrode current collector plate 13 are, for example, conductive plates such as a copper plate, an aluminum plate, a titanium plate, or a nickel plate. The positive electrode current collector plate 12p is electrically connected to the positive electrode termination electrode 18 of the first power storage module 11a. The positive electrode current collector plate 12p overlaps the bipolar electrode 16 and the separator 17 when viewed from the direction Z, and has a substantially rectangular shape. The thickness of the positive electrode current collector plate 12p is, for example, 1 mm or more and 5 mm or less.

正極集電板１２は、第２蓄電モジュール１１ｂの正極終端電極１８と電気的に接続される。正極集電板１２は、電極体２１に接触する本体部１２ａと、方向Ｘにおいて本体部１２ａの縁１２ｂの一部から突出する突出部１２ｃとを有する。突出部１２ｃは接続部材３に接続される。本体部１２ａは、方向Ｚから見てバイポーラ電極１６及びセパレータ１７に重なる部分であり、略矩形状を呈している。本体部１２ａは、正極集電板１２ｐと同じ構成を有する。正極集電板１２の厚みは、例えば、１ｍｍ以上５ｍｍ以下である。 The positive electrode current collector plate 12 is electrically connected to the positive electrode terminal electrode 18 of the second power storage module 11b. The positive electrode current collector plate 12 has a main body portion 12a that comes into contact with the electrode body 21 and a protruding portion 12c that protrudes from a part of the edge 12b of the main body portion 12a in the direction X. The protrusion 12c is connected to the connecting member 3. The main body portion 12a is a portion that overlaps the bipolar electrode 16 and the separator 17 when viewed from the direction Z, and has a substantially rectangular shape. The main body 12a has the same configuration as the positive electrode current collector plate 12p. The thickness of the positive electrode current collector plate 12 is, for example, 1 mm or more and 5 mm or less.

負極集電板１３は、方向Ｚから見て例えば略矩形状を呈している。第１負極集電板１３は、第１蓄電モジュール１１ａの負極終端電極１９と電気的に接続される。第２負極集電板１３は、第２蓄電モジュール１１ｂの負極終端電極１９と電気的に接続される。各負極集電板１３は、電極体２１に接触する本体部１３ａと、方向Ｘにおいて本体部１３ａの縁１３ｂの一部から突出する突出部１３ｃとを有する。突出部１３ｃは接続部材４に接続される。本体部１３ａは、方向Ｚにおいてバイポーラ電極１６及びセパレータ１７に重なる部分であり、略矩形状を呈している。負極集電板１３の厚みは、例えば、１ｍｍ以上５ｍｍ以下である。 The negative electrode current collector plate 13 has, for example, a substantially rectangular shape when viewed from the direction Z. The first negative electrode current collector plate 13 is electrically connected to the negative electrode terminal electrode 19 of the first power storage module 11a. The second negative electrode current collector plate 13 is electrically connected to the negative electrode terminal electrode 19 of the second power storage module 11b. Each negative electrode current collector plate 13 has a main body portion 13a that comes into contact with the electrode body 21, and a protruding portion 13c that protrudes from a part of the edge 13b of the main body portion 13a in the direction X. The protrusion 13c is connected to the connecting member 4. The main body 13a is a portion that overlaps the bipolar electrode 16 and the separator 17 in the direction Z, and has a substantially rectangular shape. The thickness of the negative electrode current collector plate 13 is, for example, 1 mm or more and 5 mm or less.

第１蓄電モジュール１１ａ及び第２蓄電モジュール１１ｂは、正極終端電極１８が互いに対向するように配置されている。正極集電板１２ｐ及び正極集電板１２は、互いに対向する二つの正極終端電極１８にそれぞれ接触するように配置されている。したがって、蓄電装置１では、第１蓄電モジュール１１ａ及び第２蓄電モジュール１１ｂが電気的に並列に接続される。 The first power storage module 11a and the second power storage module 11b are arranged so that the positive electrode termination electrodes 18 face each other. The positive electrode current collector plate 12p and the positive electrode current collector plate 12 are arranged so as to be in contact with the two positive electrode terminal electrodes 18 facing each other. Therefore, in the power storage device 1, the first power storage module 11a and the second power storage module 11b are electrically connected in parallel.

本実施形態の蓄電装置１では、熱交換器３０、正極集電板１２ｐ及び正極集電板１２が方向Ｘにおいて互いに位置決めされているので、例えば振動が蓄電装置１に加えられても、方向Ｘにおいて熱交換器３０、正極集電板１２ｐ及び正極集電板１２の位置が互いにずれ難い。さらに、本実施形態では、１つの板状部材３５を折り曲げることによって、正極集電板１２ｐ、正極集電板１２及び連結板３４が形成されている。そのため、熱交換器３０、正極集電板１２ｐ及び正極集電板１２を方向Ｚ及び方向Ｘの両方において互いに位置決めできる。また、蓄電装置１を製造する際においても、熱交換器３０、正極集電板１２ｐ及び正極集電板１２を方向Ｘ及び方向Ｚにおいて互いに位置決めできるので、蓄電装置１を容易に組み立てることができる。 In the power storage device 1 of the present embodiment, since the heat exchanger 30, the positive electrode current collector plate 12p and the positive electrode current collector plate 12 are positioned with each other in the direction X, for example, even if vibration is applied to the power storage device 1, the direction X The positions of the heat exchanger 30, the positive electrode current collector plate 12p, and the positive electrode current collector plate 12 are unlikely to shift from each other. Further, in the present embodiment, the positive electrode current collector plate 12p, the positive electrode current collector plate 12, and the connecting plate 34 are formed by bending one plate-shaped member 35. Therefore, the heat exchanger 30, the positive electrode current collector plate 12p, and the positive electrode current collector plate 12 can be positioned with each other in both the direction Z and the direction X. Further, even when the power storage device 1 is manufactured, the heat exchanger 30, the positive electrode current collector plate 12p, and the positive electrode current collector plate 12 can be positioned with each other in the directions X and Z, so that the power storage device 1 can be easily assembled. ..

図３は、変形例に係るユニットを模式的に示す図である。図３に示されるユニットＵ２は、図１のユニットＵ１に代えて使用可能である。ユニットＵ２は、正極集電板１２ｐが、方向Ｘにおいて端部１２ｐｅとは反対側の屈曲した端部１２ｐｅ１を有し、正極集電板１２が、方向Ｘにおいて端部１２ｅとは反対側の屈曲した端部１２ｅ１を有すること以外はユニットＵ１と同じ構成を有する。端部１２ｐｅ１は、方向Ｘにおいて熱交換器３０の端部よりも外側に突出しており、方向Ｚにおいて正極集電板１２ｐから正極集電板１２に向かって突出するように屈曲している。端部１２ｅ１は、方向Ｘにおいて熱交換器３０の端部よりも外側に突出しており、方向Ｚにおいて正極集電板１２から正極集電板１２ｐに向かって突出するように屈曲している。屈曲した端部１２ｐｅ１及び端部１２ｅ１により、方向Ｘにおいて熱交換器３０が連結板３４から離れるように移動することが規制される。屈曲した端部１２ｐｅ１及び端部１２ｅ１は、熱交換器３０、正極集電板１２ｐ及び正極集電板１２を方向Ｘにおいて互いに位置決めするための位置決め部である。正極集電板１２ｐ及び正極集電板１２のうちいずれか一方のみが屈曲した端部（端部１２ｐｅ１又は端部１２ｅ１）を有してもよい。端部１２ｐｅ１又は端部１２ｅ１により、方向Ｘのうち連結板３４から離れる方向への熱交換器３０の移動が規制される。 FIG. 3 is a diagram schematically showing a unit according to a modified example. The unit U2 shown in FIG. 3 can be used in place of the unit U1 shown in FIG. In the unit U2, the positive electrode current collector plate 12p has a bent end portion 12pe1 on the side opposite to the end portion 12pe in the direction X, and the positive electrode current collector plate 12 is bent on the side opposite to the end portion 12e in the direction X. It has the same configuration as the unit U1 except that it has the end portion 12e1. The end portion 12pe1 projects outward from the end portion of the heat exchanger 30 in the direction X, and is bent so as to project from the positive electrode current collector plate 12p toward the positive electrode current collector plate 12 in the direction Z. The end portion 12e1 projects outward from the end portion of the heat exchanger 30 in the direction X, and is bent so as to project from the positive electrode current collector plate 12 toward the positive electrode current collector plate 12p in the direction Z. The bent ends 12pe1 and 12e1 regulate the heat exchanger 30 from moving away from the connecting plate 34 in direction X. The bent end portion 12pe1 and the end portion 12e1 are positioning portions for positioning the heat exchanger 30, the positive electrode current collector plate 12p, and the positive electrode current collector plate 12 with each other in the direction X. Only one of the positive electrode current collector plate 12p and the positive electrode current collector plate 12 may have a bent end portion (end portion 12pe1 or end portion 12e1). The end 12pe1 or the end 12e1 regulates the movement of the heat exchanger 30 in the direction X away from the connecting plate 34.

図４（ａ）及び（ｂ）は、他の変形例に係るユニットを模式的に示す図である。図４（ａ）に示されるユニットＵ３は、図１のユニットＵ１に代えて使用可能である。ユニットＵ３は、正極集電板１２ｐと対向する正極集電板１２の主面に複数の突起１２ｆが設けられていること以外はユニットＵ１と同じ構成を有する。図４（ｂ）に示されるように、方向Ｚから見て、複数の突起１２ｆは、熱交換器３０の縁に沿って配置される。図４（ｂ）では、正極集電板１２ｐ及び正極集電板１２の突出部１２ｃが省略されている。各突起１２ｆは、熱交換器３０に当接している。方向Ｘに沿って配置された突起１２ｆは、連結板３４と共に方向Ｙにおける熱交換器３０の移動を規制する。方向Ｘに沿って配置された突起１２ｆは、熱交換器３０、正極集電板１２ｐ及び正極集電板１２を方向Ｙにおいて互いに位置決めするための位置決め部である。方向Ｙに沿って配置された突起１２ｆは、方向Ｘにおける熱交換器３０の移動を規制する。方向Ｙに沿って配置された突起１２ｆは、熱交換器３０、正極集電板１２ｐ及び正極集電板１２を方向Ｘにおいて互いに位置決めするための位置決め部である。したがって、突起１２ｆ及び連結板３４によって、熱交換器３０、正極集電板１２ｐ及び正極集電板１２を方向Ｘ、方向Ｙ及び方向Ｚにおいて保持できる。 4 (a) and 4 (b) are diagrams schematically showing units according to other modified examples. The unit U3 shown in FIG. 4A can be used in place of the unit U1 shown in FIG. The unit U3 has the same configuration as the unit U1 except that a plurality of protrusions 12f are provided on the main surface of the positive electrode current collector plate 12 facing the positive electrode current collector plate 12p. As shown in FIG. 4B, the plurality of protrusions 12f are arranged along the edge of the heat exchanger 30 when viewed from the direction Z. In FIG. 4B, the positive electrode current collector plate 12p and the protruding portion 12c of the positive electrode current collector plate 12 are omitted. Each protrusion 12f is in contact with the heat exchanger 30. The protrusions 12f arranged along the direction X, together with the connecting plate 34, regulate the movement of the heat exchanger 30 in the direction Y. The protrusions 12f arranged along the direction X are positioning portions for positioning the heat exchanger 30, the positive electrode current collector plate 12p, and the positive electrode current collector plate 12 with each other in the direction Y. The protrusions 12f arranged along the direction Y regulate the movement of the heat exchanger 30 in the direction X. The protrusions 12f arranged along the direction Y are positioning portions for positioning the heat exchanger 30, the positive electrode current collector plate 12p, and the positive electrode current collector plate 12 with each other in the direction X. Therefore, the heat exchanger 30, the positive electrode current collector plate 12p, and the positive electrode current collector plate 12 can be held in the directions X, Y, and Z by the protrusions 12f and the connecting plate 34.

正極集電板１２は、複数の突起１２ｆに代えて、単一の突起１２ｆを有してもよいし、熱交換器３０の縁に沿って配置される単一又は複数の壁を有してもよい。正極集電板１２と対向する正極集電板１２ｐの主面に１つ以上の突起１２ｆが設けられてもよい。 The positive electrode current collector plate 12 may have a single protrusion 12f instead of the plurality of protrusions 12f, or may have a single or multiple walls arranged along the edges of the heat exchanger 30. May be good. One or more protrusions 12f may be provided on the main surface of the positive electrode current collector plate 12p facing the positive electrode current collector plate 12.

図５は、他の実施形態に係る蓄電装置を示す概略側面図である。図５に示される蓄電装置１０１は、ユニットＵ１に代えてユニットＵ４を備え、第２蓄電モジュール１１ｂが方向Ｚにおいて反転しており、第２蓄電モジュール１１ｂに接続された負極集電板１３に代えて正極集電板１２を備えること以外は図１の蓄電装置１と同じ構成を備える。 FIG. 5 is a schematic side view showing a power storage device according to another embodiment. The power storage device 101 shown in FIG. 5 includes a unit U4 instead of the unit U1, the second power storage module 11b is inverted in the direction Z, and the negative electrode current collector plate 13 connected to the second power storage module 11b is replaced. It has the same configuration as the power storage device 1 of FIG. 1 except that the positive electrode current collector plate 12 is provided.

ユニットＵ４は、絶縁性を有する熱交換器１３０と、方向Ｚにおいて第１蓄電モジュール１１ａと熱交換器１３０との間に少なくとも部分的に配置された正極集電板１１２（第１集電板）と、方向Ｚにおいて第２蓄電モジュール１１ｂと熱交換器１３０との間に少なくとも部分的に配置された負極集電板１１３（第２集電板）とを備える。本実施形態では、正極集電板１１２の本体部１２ａが方向Ｚにおいて第１蓄電モジュール１１ａと熱交換器１３０との間に配置され、負極集電板１１３の本体部１３ａが方向Ｚにおいて第２蓄電モジュール１１ｂと熱交換器１３０との間に配置される。 The unit U4 has an insulating heat exchanger 130 and a positive electrode current collector 112 (first current collector) arranged at least partially between the first storage module 11a and the heat exchanger 130 in the direction Z. And a negative electrode current collector plate 113 (second current collector plate) that is at least partially arranged between the second power storage module 11b and the heat exchanger 130 in the direction Z. In the present embodiment, the main body 12a of the positive electrode current collector plate 112 is arranged between the first power storage module 11a and the heat exchanger 130 in the direction Z, and the main body 13a of the negative electrode current collector plate 113 is the second in the direction Z. It is arranged between the power storage module 11b and the heat exchanger 130.

正極集電板１１２は、熱交換器１３０に対向する主面に設けられた凸部１２ｇを有すること以外は正極集電板１２と同じ構成を有する。すなわち、正極集電板１１２は、第１蓄電モジュール１１ａの正極終端電極１８（第１電極）と電気的に接続される本体部１２ａと、本体部１２ａの縁１２ｂの一部から突出する突出部１２ｃとを有する。凸部１２ｇは例えばドーム状又はお椀状を呈する。 The positive electrode current collector plate 112 has the same configuration as the positive electrode current collector plate 12 except that it has a convex portion 12 g provided on the main surface facing the heat exchanger 130. That is, the positive electrode current collector plate 112 has a main body portion 12a that is electrically connected to the positive electrode terminal electrode 18 (first electrode) of the first power storage module 11a and a protruding portion that protrudes from a part of the edge 12b of the main body portion 12a. It has 12c and. The convex portion 12g has, for example, a dome shape or a bowl shape.

負極集電板１１３は、熱交換器１３０に対向する主面に設けられた凸部１３ｇを有すること以外は負極集電板１３と同じ構成を有する。すなわち、負極集電板１１３は、第２蓄電モジュール１１ｂの負極終端電極１９（第２電極）と電気的に接続される本体部１３ａと、本体部１３ａの縁１３ｂの一部から突出する突出部１３ｃとを有する。凸部１３ｇは例えばドーム状又はお椀状を呈する。 The negative electrode current collector plate 113 has the same configuration as the negative electrode current collector plate 13 except that it has a convex portion 13 g provided on the main surface facing the heat exchanger 130. That is, the negative electrode current collector plate 113 has a main body portion 13a that is electrically connected to the negative electrode terminal electrode 19 (second electrode) of the second power storage module 11b and a protruding portion that protrudes from a part of the edge 13b of the main body portion 13a. It has 13c and. The convex portion 13g has, for example, a dome shape or a bowl shape.

熱交換器１３０は、凸部１２ｇに嵌合する凹部３０ｂと凸部１３ｇに嵌合する凹部３０ｃとを有し、方向Ｚから見て外側に突出した端部３０ａを有すること以外は、熱交換器３０と同じ構成を有する。端部３０ａは、方向Ｚから見て、正極集電板１１２の本体部１２ａの縁１２ｂ及び負極集電板１１３の本体部１３ａの縁１３ｂよりも蓄電装置１０１の外側に突出している。方向Ｚから見て、端部３０ａは、縁１２ｂ又は縁１３ｂの全周にわたって連続的又は離散的に外側に突出してもよいし、縁１２ｂ又は縁１３ｂの一部において外側に突出してもよい。 The heat exchanger 130 has a concave portion 30b that fits into the convex portion 12g and a concave portion 30c that fits into the convex portion 13g, and heat exchange except that it has an end portion 30a that protrudes outward when viewed from the direction Z. It has the same configuration as the vessel 30. The end portion 30a projects to the outside of the power storage device 101 from the edge 12b of the main body portion 12a of the positive electrode current collector plate 112 and the edge 13b of the main body portion 13a of the negative electrode current collector plate 113 when viewed from the direction Z. Seen from direction Z, the end 30a may project outward continuously or discretely over the entire circumference of the edge 12b or 13b, or may project outward at a portion of the edge 12b or edge 13b.

凸部１２ｇ及び凹部３０ｂは、熱交換器１３０及び正極集電板１１２を方向Ｚに交差する方向において互いに位置決めするための位置決め部である。凸部１３ｇ及び凹部３０ｃは、熱交換器１３０及び負極集電板１１３を方向Ｚに交差する方向において互いに位置決めするための位置決め部である。方向Ｚから見て、凸部１２ｇは、縁１２ｂの全周にわたって連続的又は離散的に設けられてもよいし、縁１２ｂの一部に沿って設けられてもよい。方向Ｚから見て、凸部１３ｇは、縁１３ｂの全周にわたって連続的又は離散的に設けられてもよいし、縁１３ｂの一部に沿って設けられてもよい。 The convex portion 12g and the concave portion 30b are positioning portions for positioning the heat exchanger 130 and the positive electrode current collector plate 112 in the direction intersecting the direction Z. The convex portion 13g and the concave portion 30c are positioning portions for positioning the heat exchanger 130 and the negative electrode current collector plate 113 with each other in the direction intersecting the direction Z. When viewed from the direction Z, the convex portion 12g may be provided continuously or discretely over the entire circumference of the edge 12b, or may be provided along a part of the edge 12b. When viewed from the direction Z, the convex portion 13g may be provided continuously or discretely over the entire circumference of the edge 13b, or may be provided along a part of the edge 13b.

正極集電板１２及び正極集電板１１２の突出部１２ｃは接続部材３に接続される。負極集電板１３及び負極集電板１１３の突出部１３ｃは接続部材４に接続される。よって、蓄電装置１０１では、第１蓄電モジュール１１ａ及び第２蓄電モジュール１１ｂが電気的に並列に接続される。 The positive electrode current collector plate 12 and the protruding portion 12c of the positive electrode current collector plate 112 are connected to the connecting member 3. The negative electrode current collector plate 13 and the protruding portion 13c of the negative electrode current collector plate 113 are connected to the connecting member 4. Therefore, in the power storage device 101, the first power storage module 11a and the second power storage module 11b are electrically connected in parallel.

蓄電装置１０１では、方向Ｚから見て、熱交換器１３０の端部３０ａが、正極集電板１１２の本体部１２ａの縁１２ｂ及び負極集電板１１３の本体部１３ａの縁１３ｂの両方よりも蓄電装置１０１の外側に突出している。これにより、正極集電板１１２と負極集電板１１３との間の短絡を抑制することができる。例えば熱交換器１３０の流路３２が熱交換器１３０の端部３０ａに設けられており、流路３２を通る導電性の冷却用流体が流路３２から漏れた場合であっても、導電性の冷却用流体が正極集電板１１２及び負極集電板１１３に到達し難い。方向Ｚに交差する方向において、縁１２ｂ及び縁１３ｂの位置が異なる場合、熱交換器１３０の端部３０ａは、縁１２ｂ及び縁１３ｂのいずれか一方よりも外側に突出している。 In the power storage device 101, when viewed from the direction Z, the end portion 30a of the heat exchanger 130 is larger than both the edge 12b of the main body portion 12a of the positive electrode current collector plate 112 and the edge 13b of the main body portion 13a of the negative electrode current collector plate 113. It projects to the outside of the power storage device 101. As a result, a short circuit between the positive electrode current collector plate 112 and the negative electrode current collector plate 113 can be suppressed. For example, the flow path 32 of the heat exchanger 130 is provided at the end 30a of the heat exchanger 130, and even when the conductive cooling fluid passing through the flow path 32 leaks from the flow path 32, it is conductive. It is difficult for the cooling fluid of the above to reach the positive electrode current collector plate 112 and the negative electrode current collector plate 113. If the positions of the edges 12b and 13b are different in the direction intersecting the direction Z, the end 30a of the heat exchanger 130 projects outward from either the edge 12b or the edge 13b.

図６は、他の変形例に係るユニットを模式的に示す図である。図６に示されるユニットＵ５は、図５のユニットＵ４に代えて使用可能である。ユニットＵ５は、正極集電板１１２及び負極集電板１１３に代えて正極集電板１２及び負極集電板１３をそれぞれ備え、
熱交換器１３０が凹部３０ｂ及び凹部３０ｃを有しておらず、熱交換器１３０が端部３０ａに代えて端部３０ｄを有すること以外はユニットＵ４と同じ構成を有する。方向Ｚに交差する方向において、熱交換器１３０の端部３０ｄは、方向Ｚにおいて正極集電板１２と負極集電板１３との間隔よりも大きい最大幅を有すること以外は端部３０ａと同じ構成を有する。熱交換器１３０の端部３０ｄによって、方向Ｚに交差する方向における正極集電板１２及び負極集電板１３の移動が規制される。熱交換器１３０の端部３０ｄは、方向Ｚに交差する方向において、熱交換器１３０、正極集電板１２及び負極集電板１３を互いに位置決めするための位置決め部である。 FIG. 6 is a diagram schematically showing a unit according to another modification. The unit U5 shown in FIG. 6 can be used in place of the unit U4 shown in FIG. The unit U5 includes a positive electrode current collector plate 12 and a negative electrode current collector plate 13 in place of the positive electrode current collector plate 112 and the negative electrode current collector plate 113, respectively.
The heat exchanger 130 has the same configuration as the unit U4 except that the heat exchanger 130 does not have the recess 30b and the recess 30c and the heat exchanger 130 has an end 30d instead of the end 30a. In the direction intersecting the direction Z, the end portion 30d of the heat exchanger 130 is the same as the end portion 30a except that it has a maximum width larger than the distance between the positive electrode current collector plate 12 and the negative electrode current collector plate 13 in the direction Z. Has a configuration. The end 30d of the heat exchanger 130 regulates the movement of the positive electrode current collector plate 12 and the negative electrode current collector plate 13 in the direction intersecting the direction Z. The end portion 30d of the heat exchanger 130 is a positioning portion for positioning the heat exchanger 130, the positive electrode current collector plate 12, and the negative electrode current collector plate 13 with each other in the direction intersecting the direction Z.

図７は、他の変形例に係るユニットを模式的に示す図である。図７に示されるユニットＵ６は、図５のユニットＵ４に代えて使用可能である。ユニットＵ６は、正極集電板１１２が凸部１２ｇに代えて凸部１２ｈを有し、負極集電板１１３が凸部１３ｇに代えて凸部１３ｈを有し、熱交換器１３０が、凹部３０ｂ及び凹部３０ｃに代えて段差部３０ｆ及び段差部３０ｇをそれぞれ有し、端部３０ａに代えて端部３０ｅを有すること以外はユニットＵ４と同じ構成を有する。凸部１２ｈ及び凸部１３ｈは、形状が異なること以外は凸部１２ｇ及び凸部１３ｇと同じ構成を有する。方向Ｚに交差する方向において、熱交換器１３０の端部３０ｅは、方向Ｚにおいて正極集電板１２と負極集電板１３との間隔よりも小さい幅を有すること以外は端部３０ａと同じ構成を有する。そのような端部３０ｅによって、正極集電板１１２の凸部１２ｈに係合する段差部３０ｆと、負極集電板１１３の凸部１３ｈに係合する段差部３０ｇとが形成される。凸部１２ｈが段差部３０ｆに係合し、凸部１３ｈが段差部３０ｇに係合することによって、方向Ｚに交差する方向における正極集電板１１２、負極集電板１１３及び熱交換器１３０の移動が規制される。凸部１２ｈ、段差部３０ｆ、凸部１３ｈ及び段差部３０ｇは、方向Ｚに交差する方向において、熱交換器１３０、正極集電板１１２及び負極集電板１１３を互いに位置決めするための位置決め部である。 FIG. 7 is a diagram schematically showing a unit according to another modification. The unit U6 shown in FIG. 7 can be used in place of the unit U4 shown in FIG. In the unit U6, the positive electrode current collector plate 112 has a convex portion 12h instead of the convex portion 12g, the negative electrode current collector plate 113 has the convex portion 13h instead of the convex portion 13g, and the heat exchanger 130 has the concave portion 30b. It has the same configuration as the unit U4 except that it has a stepped portion 30f and a stepped portion 30g in place of the recess 30c and an end portion 30e in place of the end portion 30a. The convex portion 12h and the convex portion 13h have the same configuration as the convex portion 12g and the convex portion 13g except that the shapes are different. In the direction intersecting the direction Z, the end portion 30e of the heat exchanger 130 has the same configuration as the end portion 30a except that the end portion 30e has a width smaller than the distance between the positive electrode current collector plate 12 and the negative electrode current collector plate 13 in the direction Z. Has. Such an end portion 30e forms a stepped portion 30f that engages with the convex portion 12h of the positive electrode current collector plate 112 and a stepped portion 30g that engages with the convex portion 13h of the negative electrode current collector plate 113. By engaging the convex portion 12h with the step portion 30f and the convex portion 13h with the step portion 30g, the positive electrode current collector plate 112, the negative electrode current collector plate 113, and the heat exchanger 130 in the direction intersecting the direction Z Movement is restricted. The convex portion 12h, the step portion 30f, the convex portion 13h, and the step portion 30g are positioning portions for positioning the heat exchanger 130, the positive electrode current collector plate 112, and the negative electrode current collector plate 113 with each other in the direction intersecting the direction Z. is there.

図８は、他の実施形態に係る蓄電装置を示す概略側面図である。図８に示される蓄電装置２０１は、ユニットＵ４に代えてユニットＵ７を備えること以外は図５の蓄電装置１０１と同じ構成を備える。 FIG. 8 is a schematic side view showing a power storage device according to another embodiment. The power storage device 201 shown in FIG. 8 has the same configuration as the power storage device 101 of FIG. 5 except that the unit U7 is provided in place of the unit U4.

ユニットＵ７は、熱交換器３０と、方向Ｚにおいて第１蓄電モジュール１１ａと熱交換器３０との間に配置された正極集電板１２ｐ（第１集電板）と、方向Ｚにおいて第２蓄電モジュール１１ｂと熱交換器３０との間に配置された負極集電板１３ｐ（第２集電板）とを備える。負極集電板１３ｐは、突出部１３ｃを備えないこと以外は負極集電板１３と同じ構成を有する。 The unit U7 includes a heat exchanger 30, a positive electrode current collector plate 12p (first current collector plate) arranged between the first storage module 11a and the heat exchanger 30 in the direction Z, and a second storage plate in the direction Z. A negative electrode current collector plate 13p (second current collector plate) arranged between the module 11b and the heat exchanger 30 is provided. The negative electrode current collector plate 13p has the same configuration as the negative electrode current collector plate 13 except that the negative electrode current collector plate 13p is not provided with the protruding portion 13c.

本実施形態では、正極集電板１２ｐ及び負極集電板１３ｐが、正極集電板１２ｐの端部１２ｐｅと負極集電板１３ｐの端部１３ｐｅとを互いに連結する連結板３４と共に板状部材１３５を構成する。正極集電板１２ｐ、負極集電板１３ｐ及び連結板３４は、１つの板状部材１３５を方向Ｙから見てＵ字状に折り曲げることによって形成されている。よって、熱交換器３０は、正極集電板１２ｐ、負極集電板１３ｐ及び連結板３４によって囲まれる。これにより、方向Ｘ及び方向Ｚにおける熱交換器３０の移動を規制できる。このようにして、熱交換器３０、正極集電板１２ｐ及び負極集電板１３ｐは、方向Ｘ及び方向Ｚの両方において互いに位置決めされる。また、１つの板状部材１３５を折り曲げることによって、正極集電板１２ｐ、負極集電板１３ｐ及び連結板３４を形成する場合、正極集電板１２ｐ、負極集電板１３ｐ及び連結板３４を容易に製造できる。 In the present embodiment, the positive electrode current collector plate 12p and the negative electrode current collector plate 13p are plate-shaped members 135 together with the connecting plate 34 that connects the end portion 12pe of the positive electrode current collector plate 12p and the end portion 13pe of the negative electrode current collector plate 13p to each other. To configure. The positive electrode current collector plate 12p, the negative electrode current collector plate 13p, and the connecting plate 34 are formed by bending one plate-shaped member 135 into a U shape when viewed from the direction Y. Therefore, the heat exchanger 30 is surrounded by the positive electrode current collector plate 12p, the negative electrode current collector plate 13p, and the connecting plate 34. Thereby, the movement of the heat exchanger 30 in the direction X and the direction Z can be regulated. In this way, the heat exchanger 30, the positive electrode current collector plate 12p and the negative electrode current collector plate 13p are positioned with each other in both the direction X and the direction Z. Further, when the positive electrode current collector plate 12p, the negative electrode current collector plate 13p and the connecting plate 34 are formed by bending one plate-shaped member 135, the positive electrode current collecting plate 12p, the negative electrode current collecting plate 13p and the connecting plate 34 can be easily formed. Can be manufactured.

第１蓄電モジュール１１ａの正極終端電極１８と第２蓄電モジュール１１ｂの負極終端電極１９とが互いに対向するように、第１蓄電モジュール１１ａ及び第２蓄電モジュール１１ｂは配置されている。正極集電板１２ｐは第１蓄電モジュール１１ａの正極終端電極１８と電気的に接続される。負極集電板１３ｐは第２蓄電モジュール１１ｂの負極終端電極１９と電気的に接続される。正極集電板１２ｐは接続部材３に接続されていない。負極集電板１３ｐは接続部材４に接続されていない。正極集電板１２ｐ及び負極集電板１３ｐは連結板３４により互いに接続されている。よって、電流は、正極集電板１２ｐから連結板３４を通って負極集電板１３ｐに流れる。したがって、蓄電装置２０１では、第１蓄電モジュール１１ａ及び第２蓄電モジュール１１ｂが電気的に直列に接続される。 The first power storage module 11a and the second power storage module 11b are arranged so that the positive electrode terminal 18 of the first power storage module 11a and the negative electrode terminal 19 of the second power storage module 11b face each other. The positive electrode current collector plate 12p is electrically connected to the positive electrode termination electrode 18 of the first power storage module 11a. The negative electrode current collector plate 13p is electrically connected to the negative electrode terminal electrode 19 of the second power storage module 11b. The positive electrode current collector plate 12p is not connected to the connecting member 3. The negative electrode current collector plate 13p is not connected to the connecting member 4. The positive electrode current collector plate 12p and the negative electrode current collector plate 13p are connected to each other by a connecting plate 34. Therefore, the current flows from the positive electrode current collector plate 12p through the connecting plate 34 to the negative electrode current collector plate 13p. Therefore, in the power storage device 201, the first power storage module 11a and the second power storage module 11b are electrically connected in series.

図９は、他の変形例に係るユニットを模式的に示す図である。図９に示されるユニットＵ８は、図１のユニットＵ１に代えて使用可能である。ユニットＵ８は、連結板３４に代えて挟持部材３６を備えること以外はユニットＵ１と同じ構成を有する。よって、ユニットＵ８では、正極集電板１２ｐと正極集電板１２とが互いに別体となっている。挟持部材３６は、熱交換器３０、正極集電板１２ｐ及び正極集電板１２が、方向Ｚにおいて互いに保持されるように、正極集電板１２ｐ及び正極集電板１２を挟む。挟持部材３６によって、方向Ｚ及び方向Ｚに交差する方向（例えば、方向Ｘ）において、熱交換器３０、正極集電板１２ｐ及び正極集電板１２の移動が規制される。挟持部材３６は、例えばクリップである。挟持部材３６は、導電性を有してもよいし、絶縁性を有してもよい。挟持部材３６が絶縁性を有する場合、例えば熱交換器３０が導電性を有してもよいし、正極集電板１２ｐが、接続部材３に接続される突出部１２ｃを有してもよい。 FIG. 9 is a diagram schematically showing a unit according to another modification. The unit U8 shown in FIG. 9 can be used in place of the unit U1 shown in FIG. The unit U8 has the same configuration as the unit U1 except that the holding member 36 is provided instead of the connecting plate 34. Therefore, in the unit U8, the positive electrode current collector plate 12p and the positive electrode current collector plate 12 are separate from each other. The sandwiching member 36 sandwiches the positive electrode current collector plate 12p and the positive electrode current collector plate 12 so that the heat exchanger 30, the positive electrode current collector plate 12p and the positive electrode current collector plate 12 are held together in the direction Z. The sandwiching member 36 regulates the movement of the heat exchanger 30, the positive electrode current collector plate 12p, and the positive electrode current collector plate 12 in the direction Z and the direction intersecting the direction Z (for example, the direction X). The sandwiching member 36 is, for example, a clip. The sandwiching member 36 may have conductivity or insulation. When the sandwiching member 36 has an insulating property, for example, the heat exchanger 30 may have conductivity, or the positive electrode current collector plate 12p may have a protruding portion 12c connected to the connecting member 3.

図１０は、他の変形例に係るユニットを模式的に示す図である。図１０に示されるユニットＵ９は、図１のユニットＵ１に代えて使用可能である。ユニットＵ９は、連結板３４に代えて第１接着剤４０及び第２接着剤４２を備えること以外はユニットＵ１と同じ構成を有する。よって、ユニットＵ９では、正極集電板１２ｐと正極集電板１２とが互いに別体となっている。第１接着剤４０によって、正極集電板１２ｐと第１蓄電モジュール１１ａとが互いに接着される。第２接着剤４２によって、正極集電板１２と第２蓄電モジュール１１ｂとが互いに接着される。これにより、熱交換器３０、正極集電板１２ｐ及び正極集電板１２を方向Ｘ、方向Ｙ及び方向Ｚにおいて保持できる。第２接着剤４２は、第１接着剤４０と同じ種類の接着剤であってもよいし、第１接着剤４０と異なる種類の接着剤であってもよい。第１接着剤４０及び第２接着剤４２は導電性接着剤であってもよいし、絶縁性接着剤であってもよい。第１接着剤４０及び第２接着剤４２が絶縁性接着剤である場合、例えば正極集電板１２ｐが、接続部材３に接続される突出部１２ｃを有してもよいし、導電性の挟持部材３６を用いてもよい。 FIG. 10 is a diagram schematically showing a unit according to another modification. The unit U9 shown in FIG. 10 can be used in place of the unit U1 shown in FIG. The unit U9 has the same configuration as the unit U1 except that the first adhesive 40 and the second adhesive 42 are provided in place of the connecting plate 34. Therefore, in the unit U9, the positive electrode current collector plate 12p and the positive electrode current collector plate 12 are separate from each other. The positive electrode current collector plate 12p and the first power storage module 11a are adhered to each other by the first adhesive 40. The positive electrode current collector plate 12 and the second power storage module 11b are adhered to each other by the second adhesive 42. As a result, the heat exchanger 30, the positive electrode current collector plate 12p, and the positive electrode current collector plate 12 can be held in the directions X, Y, and Z. The second adhesive 42 may be the same type of adhesive as the first adhesive 40, or may be a different type of adhesive from the first adhesive 40. The first adhesive 40 and the second adhesive 42 may be a conductive adhesive or an insulating adhesive. When the first adhesive 40 and the second adhesive 42 are insulating adhesives, for example, the positive electrode current collector plate 12p may have a protruding portion 12c connected to the connecting member 3, or may have a conductive sandwiching. The member 36 may be used.

第１接着剤４０に代えて、正極集電板１２ｐと第１蓄電モジュール１１ａとを互いに溶着してもよい。例えば、正極集電板１２ｐと封止部材１５とを互いに溶着することができる。同様に、第２接着剤４２に代えて、正極集電板１２と第２蓄電モジュール１１ｂとを互いに溶着してもよい。例えば、正極集電板１２と封止部材１５とを互いに溶着することができる。 Instead of the first adhesive 40, the positive electrode current collector plate 12p and the first power storage module 11a may be welded to each other. For example, the positive electrode current collector plate 12p and the sealing member 15 can be welded to each other. Similarly, instead of the second adhesive 42, the positive electrode current collector plate 12 and the second power storage module 11b may be welded to each other. For example, the positive electrode current collector plate 12 and the sealing member 15 can be welded to each other.

以上、本開示の好適な実施形態について詳細に説明されたが、本開示は上記実施形態に限定されない。上記各実施形態及び各変形例は任意に組み合わされ得る。 Although the preferred embodiments of the present disclosure have been described in detail above, the present disclosure is not limited to the above embodiments. Each of the above embodiments and modifications can be arbitrarily combined.

例えば、図８のユニットＵ７において、連結板３４に代えて図９の挟持部材３６を用いてもよいし、連結板３４に代えて図１０の第１接着剤４０及び第２接着剤４２を用いてもよい。 For example, in the unit U7 of FIG. 8, the sandwiching member 36 of FIG. 9 may be used instead of the connecting plate 34, or the first adhesive 40 and the second adhesive 42 of FIG. 10 may be used instead of the connecting plate 34. You may.

１，１０１，２０１…蓄電装置、１１ａ…第１蓄電モジュール、１１ｂ…第２蓄電モジュール、１２…正極集電板（第２集電板）、１２ａ，１３ａ…本体部、１２ｂ，１３ｂ…縁、３０ａ，３０ｄ，３０ｅ…端部、１２ｐ，１１２…正極集電板（第１集電板）、１３ｐ，１１３…負極集電板（第２集電板）、１８…正極終端電極（第１電極）、１９…負極終端電極（第２電極）、３０，１３０…熱交換器、３４…連結板、３５，１３５…板状部材、３６…挟持部材、４０…第１接着剤、４２…第２接着剤。 1,101,201 ... Power storage device, 11a ... First power storage module, 11b ... Second power storage module, 12 ... Positive electrode current collector plate (second current collection plate), 12a, 13a ... Main body, 12b, 13b ... Edge, 30a, 30d, 30e ... end, 12p, 112 ... positive electrode current collector plate (first current collector plate), 13p, 113 ... negative electrode current collector plate (second current collector plate), 18 ... positive electrode terminal electrode (first electrode) ), 19 ... Negative electrode terminal electrode (second electrode), 30, 130 ... Heat exchanger, 34 ... Connecting plate, 35, 135 ... Plate-shaped member, 36 ... Holding member, 40 ... First adhesive, 42 ... Second adhesive.

Claims (6)

第１方向において積層された第１蓄電モジュール及び第２蓄電モジュールと、
前記第１方向において前記第１蓄電モジュールと前記第２蓄電モジュールとの間に少なくとも部分的に配置され、前記第１蓄電モジュール及び前記第２蓄電モジュールと熱交換を行うための熱交換器と、
前記第１方向において前記第１蓄電モジュールと前記熱交換器との間に少なくとも部分的に配置され、前記第１蓄電モジュールと電気的に接続された第１集電板と、
前記第１方向において前記第２蓄電モジュールと前記熱交換器との間に少なくとも部分的に配置され、前記第２蓄電モジュールと電気的に接続された第２集電板と、
を備え、
前記熱交換器、前記第１集電板及び前記第２集電板が、前記第１方向に交差する第２方向において互いに位置決めされている、蓄電装置。 The first power storage module and the second power storage module stacked in the first direction,
A heat exchanger that is at least partially arranged between the first power storage module and the second power storage module in the first direction and that exchanges heat with the first power storage module and the second power storage module.
A first current collector plate, which is at least partially arranged between the first power storage module and the heat exchanger in the first direction and is electrically connected to the first power storage module.
A second current collector plate, which is at least partially arranged between the second power storage module and the heat exchanger in the first direction and is electrically connected to the second power storage module.
With
A power storage device in which the heat exchanger, the first current collector plate, and the second current collector plate are positioned with each other in a second direction intersecting the first direction. 前記熱交換器、前記第１集電板及び前記第２集電板のうち少なくとも１つが、前記熱交換器、前記第１集電板及び前記第２集電板を前記第２方向において互いに位置決めするための位置決め部を有する、請求項１に記載の蓄電装置。 At least one of the heat exchanger, the first current collector plate and the second current collector plate positions the heat exchanger, the first current collector plate and the second current collector plate with each other in the second direction. The power storage device according to claim 1, further comprising a positioning unit for performing the above method. 前記第１集電板が、前記第１蓄電モジュールの第１電極と電気的に接続される本体部を有し、
前記第２集電板が、前記第２蓄電モジュールの第２電極と電気的に接続される本体部を有し、前記第２電極は前記第１電極とは異なる極性を有し、
前記第１方向から見て、前記熱交換器の端部が、前記第１集電板の前記本体部の縁及び前記第２集電板の前記本体部の縁の少なくとも一方よりも前記蓄電装置の外側に突出している、請求項１又は請求項２に記載の蓄電装置。 The first current collector plate has a main body portion that is electrically connected to the first electrode of the first power storage module.
The second current collector plate has a main body portion that is electrically connected to the second electrode of the second power storage module, and the second electrode has a polarity different from that of the first electrode.
When viewed from the first direction, the end of the heat exchanger is more than at least one of the edge of the main body of the first current collector and the edge of the main body of the second current collector. The power storage device according to claim 1 or 2, which protrudes to the outside of the above. 前記熱交換器、前記第１集電板及び前記第２集電板が、前記第１方向において互いに保持されるように、前記第１集電板及び前記第２集電板を挟む挟持部材を更に備える、請求項１から請求項３のいずれか１項に記載の蓄電装置。 A holding member that sandwiches the first current collector plate and the second current collector plate so that the heat exchanger, the first current collector plate, and the second current collector plate are held together in the first direction. The power storage device according to any one of claims 1 to 3, further comprising. 前記第１集電板及び前記第２集電板が、前記第１集電板の端部と前記第２集電板の端部とを互いに連結する連結板と共に板状部材を構成する、請求項１から請求項４のいずれか１項に記載の蓄電装置。 A claim that the first current collector plate and the second current collector plate form a plate-like member together with a connecting plate that connects an end portion of the first current collector plate and an end portion of the second current collector plate to each other. The current collector according to any one of claims 1 to 4. 前記熱交換器と前記第１集電板とが第１接着剤によって互いに接着されており、
前記熱交換器と前記第２集電板とが第２接着剤によって互いに接着されている、請求項１から請求項５のいずれか１項に記載の蓄電装置。 The heat exchanger and the first current collector plate are adhered to each other by a first adhesive.
The power storage device according to any one of claims 1 to 5, wherein the heat exchanger and the second current collector are bonded to each other by a second adhesive.
JP2019212535A 2019-11-25 2019-11-25 Power storage device Pending JP2021086661A (en)

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