JP7023367B2 - Battery pack - Google Patents

Battery pack Download PDF

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JP7023367B2
JP7023367B2 JP2020538022A JP2020538022A JP7023367B2 JP 7023367 B2 JP7023367 B2 JP 7023367B2 JP 2020538022 A JP2020538022 A JP 2020538022A JP 2020538022 A JP2020538022 A JP 2020538022A JP 7023367 B2 JP7023367 B2 JP 7023367B2
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battery pack
reinforcing member
secondary batteries
secondary battery
axis direction
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JPWO2020039626A1 (en
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正至 仲元
匡 内藤
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Vehicle Energy Japan Inc
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Vehicle Energy Japan Inc
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/227—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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

Description

本開示は、電池パックに関する。 The present disclosure relates to battery packs.

従来から電池を複数接続した電源装置に関する発明が知られている（下記特許文献１を参照）。この従来の電源装置は、ガス排出弁を有するガス排出口を第１の端面に設けた複数の電池セルと、これら複数の電池セルを積層してなる電池積層体と、この電池積層体の一面に、各電池セルのガス排出口と連結するように固定されたガスダクトと、を備えている。そして、ガスダクトの内面であって、ガス排出口との対向面に、金属層を設けている（同文献、請求項１等を参照）。 Conventionally, an invention relating to a power supply device in which a plurality of batteries are connected has been known (see Patent Document 1 below). In this conventional power supply device, a plurality of battery cells having a gas discharge port having a gas discharge valve on the first end face, a battery laminate formed by laminating these plurality of battery cells, and one surface of the battery laminate. It is provided with a gas duct fixed so as to be connected to the gas discharge port of each battery cell. A metal layer is provided on the inner surface of the gas duct and on the surface facing the gas discharge port (see the same document, claim 1 and the like).

上記構成により、電池セルのガス排出弁から高温のガスが排出されても、金属層によってガスダクトの耐熱性と強度を増すことができる。その結果、ガスダクトの高さを低減することができ、電源装置を小型化できる（同文献、第０００６段落等を参照。）。 With the above configuration, even if high temperature gas is discharged from the gas discharge valve of the battery cell, the heat resistance and strength of the gas duct can be increased by the metal layer. As a result, the height of the gas duct can be reduced and the power supply device can be miniaturized (see the same document, paragraph 0006, etc.).

また、上記従来の電源装置の一態様では、インサート成形により、金属板をガスダクトの内面に固定して金属層を設けている（同文献、第００３６段落、図８等を参照。）。この場合、多少厚みのある金属板であっても、ガスダクトの定位置に強固に固定することができ、インサートされる金属板によってガスダクト全体を補強することができる。また、金属板からなる金属層は、係止構造や嵌着構造等の手段によって、ガスダクトの内面の定位置に固定することもできる。 Further, in one aspect of the above-mentioned conventional power supply device, a metal plate is fixed to the inner surface of a gas duct to provide a metal layer by insert molding (see the same document, paragraph 0036, FIG. 8 and the like). In this case, even a slightly thick metal plate can be firmly fixed at a fixed position of the gas duct, and the entire gas duct can be reinforced by the inserted metal plate. Further, the metal layer made of a metal plate can be fixed at a fixed position on the inner surface of the gas duct by means such as a locking structure or a fitting structure.

特開２０１５－１３３１６９号公報Japanese Unexamined Patent Publication No. 2015-133169

前記従来の電源装置のように、複数の電池を備えた電池パックは、たとえば、車両を走行させるモータの電源装置として用いられるため、小型化の要求を満たしつつ、異常時に電池から排出されるガスを安全に排出することが要求される。また、電池パックは、車両の衝突時などに作用する大きな外力に耐え得る強度が要求される。前記従来の電源装置は、ガスダクトの内面に固定された金属板によってガスダクト全体を補強することができるが、このガスダクトは、電源装置全体を補強する部材としては不十分である。 A battery pack equipped with a plurality of batteries, such as the conventional power supply device, is used, for example, as a power supply device for a motor for traveling a vehicle. Therefore, while satisfying the demand for miniaturization, gas discharged from the battery in the event of an abnormality Is required to be discharged safely. Further, the battery pack is required to have strength that can withstand a large external force acting in the event of a vehicle collision or the like. In the conventional power supply device, the entire gas duct can be reinforced by a metal plate fixed to the inner surface of the gas duct, but this gas duct is insufficient as a member for reinforcing the entire power supply device.

本開示は、小型化の要求を満たしつつ異常時に電池から排出されるガスを安全に排出することができ、かつ車両の衝突時などに作用する大きな外力に耐え得る電池パックを提供する。 The present disclosure provides a battery pack that can safely discharge the gas discharged from the battery in the event of an abnormality while satisfying the demand for miniaturization, and can withstand a large external force acting in the event of a vehicle collision or the like.

本開示の一態様は、積層配置された複数の二次電池と補強部材とを備えた電池パックであって、前記補強部材は、前記電池パックの一端から他端まで一方向に延びて前記電池パックを補強する補強部と、前記補強部材の一端から他端まで一方向に延びて該複数の二次電池のガス排出弁が設けられた端面に対向するガス捕捉部と、を有することを特徴とする電池パックである。 One aspect of the present disclosure is a battery pack including a plurality of secondary batteries arranged in a laminated manner and a reinforcing member, and the reinforcing member extends in one direction from one end to the other end of the battery pack. It is characterized by having a reinforcing portion for reinforcing the pack and a gas trapping portion extending in one direction from one end to the other end of the reinforcing member and facing an end surface provided with gas discharge valves of the plurality of secondary batteries. It is a battery pack.

本開示の上記一態様によれば小型化の要求を満たしつつ異常時に電池から排出されるガスをガス捕捉部によって捕捉して安全に排出することができ、かつ車両の衝突時などに作用する大きな外力に耐え得る電池パックを提供することができる。 According to the above aspect of the present disclosure, the gas discharged from the battery in the event of an abnormality can be captured by the gas trapping unit and safely discharged while satisfying the demand for miniaturization, and has a large effect in the event of a vehicle collision or the like. It is possible to provide a battery pack that can withstand an external force.

本開示の実施形態１に係る電池パックの分解斜視図。An exploded perspective view of the battery pack according to the first embodiment of the present disclosure. 図１に示す電池パックの二次電池積層体と補強部材の分解斜視図。An exploded perspective view of the secondary battery laminate and the reinforcing member of the battery pack shown in FIG. 1. 図１に示す電池パックの二次電池積層体と補強部材の平面図。FIG. 3 is a plan view of the secondary battery laminate and the reinforcing member of the battery pack shown in FIG. 1. 図３Ａに示す二次電池積層体と補強部材の側面図。A side view of the secondary battery laminate and the reinforcing member shown in FIG. 3A. 図２に示す二次電池積層体を構成する二次電池の斜視図。FIG. 2 is a perspective view of a secondary battery constituting the secondary battery laminate shown in FIG. 2. 図３Ａおよび図３Ｂに示す補強部材の変形例を示す平面図。The plan view which shows the modification of the reinforcing member shown in FIG. 3A and FIG. 3B. 図３Ａおよび図３Ｂに示す補強部材の変形例を示す側面図。A side view showing a modified example of the reinforcing member shown in FIGS. 3A and 3B. 本開示の実施形態２に係る電池パックの二次電池積層体と補強部材の平面図。The plan view of the secondary battery laminate and the reinforcing member of the battery pack which concerns on Embodiment 2 of this disclosure. 図６Ａに示す二次電池積層体と補強部材の側面図。A side view of the secondary battery laminate and the reinforcing member shown in FIG. 6A. 図６Ａに示す二次電池積層体と補強部材の正面図。The front view of the secondary battery laminate and the reinforcing member shown in FIG. 6A. 本開示の実施形態１および２の電池パックの補強部材の変形例を示す概念図。The conceptual diagram which shows the modification of the reinforcing member of the battery pack of Embodiment 1 and 2 of this disclosure.

以下、図面を参照して本開示の電池パックの実施形態を説明する。 Hereinafter, embodiments of the battery pack of the present disclosure will be described with reference to the drawings.

［実施形態１］
図１は、本開示の実施形態１に係る電池パック１００の分解斜視図である。図２は、図１に示す電池パック１００の二次電池積層体１０の分解斜視図である。図３Ａは、図１に示す電池パック１００の二次電池積層体１０の平面図である。図３Ｂは、図３Ａに示す二次電池積層体１０の側面図である。図４は、図２に示す二次電池積層体１０を構成する二次電池１の斜視図である。[Embodiment 1]
FIG. 1 is an exploded perspective view of the battery pack 100 according to the first embodiment of the present disclosure. FIG. 2 is an exploded perspective view of the secondary battery laminate 10 of the battery pack 100 shown in FIG. 1. FIG. 3A is a plan view of the secondary battery laminate 10 of the battery pack 100 shown in FIG. FIG. 3B is a side view of the secondary battery laminate 10 shown in FIG. 3A. FIG. 4 is a perspective view of the secondary battery 1 constituting the secondary battery laminate 10 shown in FIG. 2.

本実施形態の電池パック１００は、たとえば電気自動車（ＥＶ）やハイブリッド車（ＨＥＶ）などの車両に搭載され、入出力端子１０１，１０１を介して供給された電力によって二次電池積層体１０を構成する複数の二次電池１が充電される。また、電池パック１００は、二次電池積層体１０を構成する複数の二次電池１に充電された電力を、入出力端子１０１，１０１を介して、たとえば車両のモータなどの電気機器に供給する。 The battery pack 100 of the present embodiment is mounted on a vehicle such as an electric vehicle (EV) or a hybrid vehicle (HEV), and constitutes a secondary battery laminate 10 by power supplied via input / output terminals 101 and 101. A plurality of secondary batteries 1 are charged. Further, the battery pack 100 supplies the electric power charged in the plurality of secondary batteries 1 constituting the secondary battery laminate 10 to an electric device such as a vehicle motor via the input / output terminals 101 and 101. ..

詳細については後述するが、本実施形態の電池パック１００は、次の構成を特徴としている。電池パック１００は、積層配置された複数の二次電池１と、補強部材２０と、を備えている。補強部材２０は、電池パック１００の一端から他端まで一方向に延びて電池パック１００を補強する補強部２１と、補強部材２０の一端から他端まで一方向に延びて複数の二次電池１のガス排出弁１ｖが設けられた端面に対向するガス捕捉部２２と、を有する。 Although details will be described later, the battery pack 100 of the present embodiment is characterized by the following configuration. The battery pack 100 includes a plurality of secondary batteries 1 stacked and arranged, and a reinforcing member 20. The reinforcing member 20 includes a reinforcing portion 21 extending in one direction from one end to the other end of the battery pack 100 to reinforce the battery pack 100, and a plurality of secondary batteries 1 extending in one direction from one end to the other end of the reinforcing member 20. It has a gas trapping portion 22 facing the end face provided with the gas discharge valve 1v of the above.

以下、本実施形態の電池パック１００の各部の構成をより詳細に説明する。電池パック１００は、たとえば、二次電池積層体１０と、補強部材２０と、電装ホルダ３０と、筐体４０と、を備えている。 Hereinafter, the configuration of each part of the battery pack 100 of the present embodiment will be described in more detail. The battery pack 100 includes, for example, a secondary battery laminate 10, a reinforcing member 20, an electrical holder 30, and a housing 40.

二次電池積層体１０は、たとえば、おおむね直方体の形状を有している。各図に、二次電池積層体１０の長さ方向をＸ軸、幅方向をＹ軸、高さ方向をＺ軸とする直交座標系を示す。二次電池積層体１０は、たとえば、長さ方向（Ｘ軸方向）の寸法が幅方向（Ｙ軸方向）の寸法よりも大きく、高さ方向（Ｚ軸方向）の寸法が幅方向（Ｙ軸方向）の寸法よりも小さくなっている。 The secondary battery laminate 10 has, for example, a substantially rectangular parallelepiped shape. Each figure shows a Cartesian coordinate system in which the length direction of the secondary battery laminate 10 is the X axis, the width direction is the Y axis, and the height direction is the Z axis. In the secondary battery laminate 10, for example, the dimension in the length direction (X-axis direction) is larger than the dimension in the width direction (Y-axis direction), and the dimension in the height direction (Z-axis direction) is the width direction (Y-axis direction). It is smaller than the dimension (direction).

二次電池積層体１０は、たとえば、積層配置された複数の二次電池１と、これら複数の二次電池１を保持する複数のセルホルダ（図示を省略。）と、複数の二次電池１を接続する複数のバスバー２と、これら複数のバスバー２を保持するバスバーホルダ３と、を有している。また、二次電池積層体１０は、複数の二次電池１の積層方向の一端と他端に配置されたプレート４，４と、複数の二次電池１の積層方向の中間部に配置されたプレート５と、複数の二次電池１の幅方向（Ｙ軸方向）の一端と他端に配置されたプレート６，６と、を備えている。 The secondary battery laminate 10 includes, for example, a plurality of secondary batteries 1 stacked and arranged, a plurality of cell holders (not shown) holding the plurality of secondary batteries 1, and a plurality of secondary batteries 1. It has a plurality of bus bars 2 to be connected, and a bus bar holder 3 for holding the plurality of bus bars 2. Further, the secondary battery laminate 10 is arranged between the plates 4 and 4 arranged at one end and the other end of the plurality of secondary batteries 1 in the stacking direction and the intermediate portion in the stacking direction of the plurality of secondary batteries 1. It includes a plate 5 and plates 6 and 6 arranged at one end and the other end in the width direction (Y-axis direction) of the plurality of secondary batteries 1.

二次電池１は、図４に示すように、たとえば偏平角形のリチウムイオン二次電池である。二次電池１は、二次電池１の厚さ方向を向く広側面１ｗと、その厚さ方向に沿う狭側面１ｎとを有している。また、本実施形態の電池パック１００において、二次電池１は、広側面１ｗを二次電池積層体１０の長手方向（Ｘ軸方向）へ向けてその厚さ方向に積層され、端子面１ａが補強部材２０に対向している。 As shown in FIG. 4, the secondary battery 1 is, for example, a flat-angle lithium-ion secondary battery. The secondary battery 1 has a wide side surface 1w facing the thickness direction of the secondary battery 1 and a narrow side surface 1n along the thickness direction thereof. Further, in the battery pack 100 of the present embodiment, in the secondary battery 1, the wide side surface 1w is laminated in the longitudinal direction (X-axis direction) of the secondary battery laminate 10 in the thickness direction thereof, and the terminal surface 1a is formed. It faces the reinforcing member 20.

より詳細には、二次電池１は、厚さ方向の両側に最も面積の大きい長方形の広側面１ｗを有し、広側面１ｗの短手方向の一端と他端にそれぞれ細長い長方形の底面１ｂと端子面１ａを有している。また、二次電池１は、広側面１ｗの長手方向の両端に最も面積の小さい狭側面１ｎを有している。二次電池１は、厚さ方向に沿う端子面１ａに、外部端子１Ｐ，１Ｎを有している。 More specifically, the secondary battery 1 has a rectangular wide side surface 1w having the largest area on both sides in the thickness direction, and an elongated rectangular bottom surface 1b at one end and the other end of the wide side surface 1w in the lateral direction. It has a terminal surface 1a. Further, the secondary battery 1 has narrow side surfaces 1n having the smallest area at both ends of the wide side surface 1w in the longitudinal direction. The secondary battery 1 has external terminals 1P and 1N on a terminal surface 1a along the thickness direction.

より具体的には、二次電池１の端子面１ａの長手方向の一端と他端に離隔して、それぞれ、正極と負極の外部端子１Ｐ，１Ｎが設けられている。外部端子１Ｐ，１Ｎは、二次電池１の端子面１ａに垂直な方向において、端子面１ａから補強部材２０に向けて突出するおおむね直方体のブロック状の形状を有している。また、二次電池１は、補強部材２０に対向する端子面１ａに、ガス排出弁１ｖを有している。 More specifically, external terminals 1P and 1N of the positive electrode and the negative electrode are provided at one end and the other end of the terminal surface 1a of the secondary battery 1 in the longitudinal direction, respectively. The external terminals 1P and 1N have a substantially rectangular parallelepiped block shape protruding from the terminal surface 1a toward the reinforcing member 20 in a direction perpendicular to the terminal surface 1a of the secondary battery 1. Further, the secondary battery 1 has a gas discharge valve 1v on the terminal surface 1a facing the reinforcing member 20.

ガス排出弁１ｖは、たとえば、二次電池１の筐体を構成する電池蓋の一部を薄肉化してスリット状の溝を形成することによって設けられている。ガス排出弁１ｖは、何らかの異常により二次電池１の内部の圧力が上昇して所定の圧力を超えたときに開裂し、二次電池１の内部のガスを排出することで、二次電池１の安全性を確保する。ガス排出弁１ｖは、二次電池１のおおむね長方形の端子面１ａの長手方向における中央部に設けられている。 The gas discharge valve 1v is provided, for example, by thinning a part of the battery lid constituting the housing of the secondary battery 1 to form a slit-shaped groove. The gas discharge valve 1v is cleaved when the pressure inside the secondary battery 1 rises due to some abnormality and exceeds a predetermined pressure, and the gas inside the secondary battery 1 is discharged to discharge the gas inside the secondary battery 1. To ensure the safety of. The gas discharge valve 1v is provided at the center of the secondary battery 1 in the longitudinal direction of the substantially rectangular terminal surface 1a.

複数の二次電池１は、たとえば、各二次電池１の端子面１ａを補強部材２０に対向させて厚さ方向に積層させて配置されている。複数の二次電池１は、隣り合う二つの二次電池１において、一方の二次電池１の正極の外部端子１Ｐと他方の二次電池１の負極の外部端子１Ｎとが積層方向に隣り合うように、正極の外部端子１Ｐと負極の外部端子１Ｎとの位置を交互に反転させて積層させて配置されている。 The plurality of secondary batteries 1 are arranged, for example, by stacking the terminal surfaces 1a of each secondary battery 1 so as to face the reinforcing member 20 in the thickness direction. In the plurality of secondary batteries 1, in two adjacent secondary batteries 1, the external terminal 1P of the positive electrode of one secondary battery 1 and the external terminal 1N of the negative electrode of the other secondary battery 1 are adjacent to each other in the stacking direction. As described above, the positions of the external terminal 1P of the positive electrode and the external terminal 1N of the negative electrode are alternately inverted and laminated.

バスバー２は、導電性を有する金属製の板状の部材であり、バスバーホルダ３に保持され、積層配置された複数の二次電池１の互いに隣り合う外部端子１Ｐ，１Ｎに接合され、複数の二次電池１を直列に接続している。積層方向の一方の端部に配置された二次電池１の正極の外部端子１Ｐに接合されたバスバー２と、積層方向の他方の端部に配置された二次電池１の負極の外部端子１Ｎに接合されたバスバー２は、それぞれ、電装ホルダ３０の端子に接続されている。 The bus bar 2 is a conductive metal plate-shaped member, which is held by the bus bar holder 3 and is joined to a plurality of external terminals 1P and 1N adjacent to each other of a plurality of secondary batteries 1 stacked and arranged. The secondary batteries 1 are connected in series. The bus bar 2 joined to the external terminal 1P of the positive electrode of the secondary battery 1 arranged at one end in the stacking direction and the external terminal 1N of the negative electrode of the secondary battery 1 arranged at the other end in the stacking direction. Each of the bus bars 2 joined to the above is connected to the terminal of the electrical holder 30.

バスバーホルダ３は、たとえば、ホルダ本体３ａと、ホルダカバー３ｂとを有している。ホルダ本体３ａは、たとえばポリプロピレン（ＰＰ）等の電気絶縁性を有する樹脂製の板状または枠状の部材であり、複数の二次電池１の端子面１ａに対向して配置されている。ホルダ本体３ａは、たとえば、複数の二次電池１の外部端子１Ｐ，１Ｎに対応する位置に開口部を有し、隣接するバスバー２の間を隔壁によって電気的に絶縁している。 The bus bar holder 3 has, for example, a holder body 3a and a holder cover 3b. The holder body 3a is a plate-shaped or frame-shaped member made of a resin having electrical insulation such as polypropylene (PP), and is arranged so as to face the terminal surface 1a of the plurality of secondary batteries 1. The holder body 3a has, for example, an opening at a position corresponding to the external terminals 1P and 1N of the plurality of secondary batteries 1, and the adjacent bus bars 2 are electrically insulated from each other by a partition wall.

ホルダカバー３ｂは、たとえばＰＰ等の電気絶縁性を有する樹脂製の板状の部材であり、ホルダ本体３ａのおおむね全体を覆い、バスバー２と補強部材２０との間を電気的に絶縁するように設けられている。ホルダ本体３ａおよびホルダカバー３ｂは、中央部にプレート５の上端面を露出させる矩形の長孔状の貫通孔を有している。 The holder cover 3b is a plate-shaped member made of a resin having electrical insulation such as PP, and covers almost the entire holder body 3a so as to electrically insulate between the bus bar 2 and the reinforcing member 20. It is provided. The holder body 3a and the holder cover 3b have a rectangular elongated through hole in the central portion that exposes the upper end surface of the plate 5.

一対のプレート４，４は、それぞれ、複数の二次電池１の積層方向の一端と他端に配置された二次電池１の広側面１ｗにセルホルダを介して対向するエンドプレートである。プレート４は、二次電池積層体１０の幅方向（Ｙ軸方向）の両端面にプレート６を固定するためのねじ穴が設けられ、補強部材２０に対向する上端面に補強部材２０を固定するためのねじ穴が設けられている。 The pair of plates 4 and 4 are end plates facing the wide side surface 1w of the secondary batteries 1 arranged at one end and the other end in the stacking direction of the plurality of secondary batteries 1 via a cell holder, respectively. The plate 4 is provided with screw holes for fixing the plate 6 on both end faces in the width direction (Y-axis direction) of the secondary battery laminate 10, and the reinforcing member 20 is fixed to the upper end surface facing the reinforcing member 20. There is a screw hole for this.

プレート４の上端面は、二次電池積層体１０の高さ方向（Ｚ軸方向）において、バスバーホルダ３のホルダカバー３ｂとおおむね等しい高さ位置またはホルダカバー３ｂよりもやや上方に位置している。また、プレート４は、たとえば、筐体４０の底壁に対向する下端面に、プレート４を筐体４０に固定するためのねじ穴が設けられ、筐体４０の底壁の貫通孔に挿通させたボルトをプレート４の下端面のボルト穴に締結することで、筐体４０に固定されている。 The upper end surface of the plate 4 is located at a height approximately equal to that of the holder cover 3b of the bus bar holder 3 or slightly above the holder cover 3b in the height direction (Z-axis direction) of the secondary battery laminate 10. .. Further, for example, the plate 4 is provided with a screw hole for fixing the plate 4 to the housing 40 on the lower end surface facing the bottom wall of the housing 40, and is inserted into a through hole in the bottom wall of the housing 40. It is fixed to the housing 40 by fastening the bolts to the bolt holes on the lower end surface of the plate 4.

プレート５は、複数の二次電池１の積層方向の中間部に配置された二つの二次電池１の広側面１ｗにセルホルダを介して対向する中間プレートである。プレート５は、二次電池積層体１０の幅方向（Ｙ軸方向）の両端面にプレート６を固定するためのねじ穴が設けられ、補強部材２０に対向する上端面に補強部材２０を固定するためのねじ穴が設けられている。 The plate 5 is an intermediate plate facing the wide side surface 1w of the two secondary batteries 1 arranged in the intermediate portion in the stacking direction of the plurality of secondary batteries 1 via the cell holder. The plate 5 is provided with screw holes for fixing the plate 6 on both end faces in the width direction (Y-axis direction) of the secondary battery laminate 10, and the reinforcing member 20 is fixed to the upper end surface facing the reinforcing member 20. There is a screw hole for this.

プレート５の上端面は、二次電池積層体１０の高さ方向（Ｚ軸方向）において、バスバーホルダ３のホルダカバー３ｂとおおむね等しい高さ位置またはホルダカバー３ｂよりもやや上方に位置している。プレート５の上端部は、ホルダ本体３ａおよびホルダカバー３ｂの中央部の長孔状の貫通孔を貫通し、補強部材２０に対向している。また、プレート５は、たとえば、筐体４０の底壁に対向する下端面に、プレート５を筐体４０に固定するためのねじ穴が設けられ、筐体４０の底壁の貫通孔に挿通させたボルトをプレート５の下端面のボルト穴に締結することで、筐体４０に固定されている。 The upper end surface of the plate 5 is located at a height approximately equal to that of the holder cover 3b of the bus bar holder 3 or slightly above the holder cover 3b in the height direction (Z-axis direction) of the secondary battery laminate 10. .. The upper end portion of the plate 5 penetrates the elongated through hole in the central portion of the holder body 3a and the holder cover 3b and faces the reinforcing member 20. Further, for example, the plate 5 is provided with a screw hole for fixing the plate 5 to the housing 40 on the lower end surface facing the bottom wall of the housing 40, and is inserted into a through hole in the bottom wall of the housing 40. It is fixed to the housing 40 by fastening the bolts to the bolt holes on the lower end surface of the plate 5.

一対のプレート６，６は、複数の二次電池１の幅方向（Ｙ軸方向）の一端と他端に配置され、二次電池積層体１０の長さ方向（Ｘ軸方向）の一端から他端まで延びるサイドプレートである。プレート６は、長さ方向（Ｘ軸方向）の両端部と中間部にボルトを挿通させる貫通孔を有し、これらの貫通孔に挿通させたボルトを、プレート４，５，４の幅方向（Ｙ軸方向）を向く端面に設けられたねじ穴に締結することで、プレート４，５，４に固定されている。 The pair of plates 6 and 6 are arranged at one end and the other end in the width direction (Y-axis direction) of the plurality of secondary batteries 1, and from one end in the length direction (X-axis direction) of the secondary battery laminate 10 to the other. A side plate that extends to the edge. The plate 6 has through holes for inserting bolts at both ends and the middle portion in the length direction (X-axis direction), and the bolts inserted through these through holes are inserted in the width directions of the plates 4, 5 and 4 ( It is fixed to the plates 4, 5 and 4 by fastening it to a screw hole provided on the end face facing (in the Y-axis direction).

補強部材２０は、たとえば、亜鉛めっき鋼鈑などの金属材料によって構成された板状の部材である。補強部材２０は、たとえば、積層配置された複数の二次電池１との間にバスバー２を保持したバスバーホルダ３を介在させ、複数の二次電池１の端子面１ａに対向するように配置されている。補強部材２０は、たとえば、二次電池積層体１０の長さ方向（Ｘ軸方向）の一端から他端まで延びるとともに、二次電池積層体１０の幅方向（Ｙ軸方向）の一端から他端まで延びている。 The reinforcing member 20 is a plate-shaped member made of a metal material such as a galvanized steel plate. The reinforcing member 20 is arranged so as to face the terminal surface 1a of the plurality of secondary batteries 1 with the bus bar holder 3 holding the bus bar 2 interposed between the reinforcing members 20 and the plurality of secondary batteries 1 arranged in a laminated manner. ing. The reinforcing member 20 extends from one end in the length direction (X-axis direction) of the secondary battery laminate 10 to the other end, and the reinforcing member 20 extends from one end to the other end in the width direction (Y-axis direction) of the secondary battery laminate 10. Extends to.

補強部材２０は、前述のように、電池パック１００の一端から他端まで一方向（Ｘ軸方向）に延びて電池パック１００を補強する補強部２１と、補強部材２０の一端から他端まで一方向（Ｘ軸方向）に延びてその複数の二次電池１のガス排出弁１ｖが設けられた端面である端子面１ａに対向するガス捕捉部２２と、を有している。 As described above, the reinforcing member 20 extends from one end to the other end of the battery pack 100 in one direction (X-axis direction) to reinforce the battery pack 100, and one from one end to the other end of the reinforcing member 20. It has a gas trapping portion 22 extending in a direction (X-axis direction) and facing a terminal surface 1a which is an end surface provided with gas discharge valves 1v of the plurality of secondary batteries 1.

補強部２１は、たとえば、複数の二次電池１に対向する板状に設けられ、上記一方向（Ｘ軸方向）に交差する幅方向（Ｙ軸方向）から厚さ方向（Ｚ軸方向）へ屈曲された複数の屈曲部２１ａを有している。屈曲部２１ａは、たとえば二次電池積層体１０の長さ方向（Ｘ軸方向）において、電池パック１００の一端から他端まで延びている。補強部２１は、たとえば、複数の補強部２１において曲面状に曲折され、二次電池積層体１０の高さ方向（Ｚ軸方向）の上下に往復する波板状の形状を有している。 The reinforcing portion 21 is provided in a plate shape facing the plurality of secondary batteries 1, for example, from the width direction (Y-axis direction) intersecting the one direction (X-axis direction) to the thickness direction (Z-axis direction). It has a plurality of bent portions 21a. The bent portion 21a extends from one end to the other end of the battery pack 100, for example, in the length direction (X-axis direction) of the secondary battery laminate 10. The reinforcing portion 21 has, for example, a corrugated plate shape that is bent in a curved surface shape in a plurality of reinforcing portions 21 and reciprocates up and down in the height direction (Z-axis direction) of the secondary battery laminate 10.

補強部材２０は、たとえば、上記一方向（Ｘ軸方向）に延びてプレート４，５に固定された平板状の固定部２３を備えている。固定部２３は、プレート４，５の上端面および複数の二次電池１の端子面１ａに対向する平坦な部分であり、二次電池積層体１０の高さ方向（Ｚ軸方向）における補強部材２０の下端面である。固定部２３は、たとえば、二次電池積層体１０の長さ方向（Ｘ軸方向）において、プレート４，５の上端面のねじ穴に対応する位置に、貫通孔を有している。補強部材２０は、たとえば固定部２３の貫通孔にボルトを挿通させてプレート４，５の上端面のねじ穴に締結することで、プレート４，５に固定されている。補強部２１は、たとえば固定部２３と一体に設けられ、固定部２３に連結されている。 The reinforcing member 20 includes, for example, a flat plate-shaped fixing portion 23 extending in one direction (X-axis direction) and fixed to the plates 4 and 5. The fixing portion 23 is a flat portion facing the upper end surfaces of the plates 4 and 5 and the terminal surfaces 1a of the plurality of secondary batteries 1, and is a reinforcing member in the height direction (Z-axis direction) of the secondary battery laminate 10. It is the lower end surface of 20. The fixing portion 23 has, for example, a through hole at a position corresponding to a screw hole on the upper end surface of the plates 4 and 5 in the length direction (X-axis direction) of the secondary battery laminate 10. The reinforcing member 20 is fixed to the plates 4 and 5 by, for example, inserting a bolt into the through hole of the fixing portion 23 and fastening the reinforcing member 20 to the screw hole on the upper end surface of the plates 4 and 5. The reinforcing portion 21 is provided integrally with the fixing portion 23, for example, and is connected to the fixing portion 23.

補強部２１は、たとえば、ガス捕捉部２２の幅方向（Ｙ軸方向）の両側に固定部２３を介して連結されている。より詳細には、ガス捕捉部２２は、積層配置された複数の二次電池１のガス排出弁１ｖが設けられた端子面１ａに対向する平坦な幅広部と、その幅広部の幅方向（Ｙ軸方向）の両端部の屈曲部２２ａで二次電池積層体１０の高さ方向（Ｚ軸方向）に下方へ向けて屈曲された平坦な幅挟部とを有している。 The reinforcing portion 21 is connected to both sides of the gas trapping portion 22 in the width direction (Y-axis direction) via the fixing portions 23, for example. More specifically, the gas capture unit 22 has a flat wide portion facing the terminal surface 1a provided with the gas discharge valves 1v of the plurality of secondary batteries 1 stacked and arranged, and the width direction (Y) of the wide portion. It has a flat width sandwiching portion that is bent downward in the height direction (Z-axis direction) of the secondary battery laminate 10 at the bent portions 22a at both ends in the axial direction).

ガス捕捉部２２の幅広部は、たとえば、二次電池積層体１０の長さ方向（Ｘ軸方向）および幅方向（Ｙ軸方向）におおむね平行である。ガス捕捉部２２の幅広部の上面は、補強部材２０の上端面である。ガス捕捉部２２の幅狭部は、たとえば、二次電池積層体１０の長さ方向（Ｘ軸方向）および高さ方向（Ｚ軸方向）におおむね平行である。 The wide portion of the gas trapping portion 22 is, for example, substantially parallel in the length direction (X-axis direction) and the width direction (Y-axis direction) of the secondary battery laminate 10. The upper surface of the wide portion of the gas trapping portion 22 is the upper end surface of the reinforcing member 20. The narrow portion of the gas trapping portion 22 is, for example, substantially parallel to the length direction (X-axis direction) and the height direction (Z-axis direction) of the secondary battery laminate 10.

ガス捕捉部２２の幅広部と幅狭部は、それぞれ、二次電池積層体１０の長さ方向（Ｘ軸方向）の一端から他端まで延び、電池パック１００の一端から他端まで延びている。ガス捕捉部２２は、固定部２３に隣接する幅狭部の下端部が二次電池積層体１０の高さ方向（Ｚ軸方向）から幅方向（Ｙ軸方向）へ向けて屈曲された屈曲部２２ｂを介して固定部２３に連結されている。すなわち、ガス捕捉部２２は、幅狭部の下端部の屈曲部２２ｂが、固定部２３を介して補強部２１の下端部の屈曲部２１ａに連結されている。 The wide portion and the narrow portion of the gas trapping portion 22 extend from one end to the other end in the length direction (X-axis direction) of the secondary battery laminate 10, respectively, and extend from one end to the other end of the battery pack 100. .. The gas trapping portion 22 is a bent portion in which the lower end portion of the narrow portion adjacent to the fixing portion 23 is bent from the height direction (Z-axis direction) to the width direction (Y-axis direction) of the secondary battery laminate 10. It is connected to the fixing portion 23 via 22b. That is, in the gas trapping portion 22, the bent portion 22b at the lower end of the narrow portion is connected to the bent portion 21a at the lower end of the reinforcing portion 21 via the fixing portion 23.

電装ホルダ３０は、基板、リレー、およびヒューズなど、電池パック１００を構成する電装品を保持している。電装ホルダ３０は、たとえば、ポリブチレンテレフタレート（ＰＢＴ）等の電気絶縁性を有する樹脂材料によって構成されたおおむね長方形の板状の部材である。この長方形の電装ホルダ３０の長手方向は、筐体４０の長手方向に一致している。電装ホルダ３０は、複数の二次電池１を制御する制御部３１を保持している。制御部３１は、筐体４０に収容され、複数の二次電池１を含む二次電池積層体１０に隣接して配置され、二次電池積層体１０の幅方向（Ｙ軸方向）において補強部材２０に隣接して配置されている。 The electrical holder 30 holds electrical components that make up the battery pack 100, such as a substrate, a relay, and a fuse. The electrical holder 30 is a substantially rectangular plate-shaped member made of a resin material having electrical insulation such as polybutylene terephthalate (PBT). The longitudinal direction of the rectangular electrical holder 30 coincides with the longitudinal direction of the housing 40. The electrical holder 30 holds a control unit 31 that controls a plurality of secondary batteries 1. The control unit 31 is housed in the housing 40 and is arranged adjacent to the secondary battery laminate 10 including the plurality of secondary batteries 1, and is a reinforcing member in the width direction (Y-axis direction) of the secondary battery laminate 10. It is arranged adjacent to 20.

電装ホルダ３０は、長手方向の一端と他端に、それぞれ、正極と負極の入出力端子１０１を備えている。正極の入出力端子１０１は、たとえば、電装ホルダ３０に保持された電装品および制御部３１を介して、積層方向の一方の端部に配置された二次電池１の正極の外部端子１Ｐに接合されたバスバー２に接続されている。負極の入出力端子１０１は、たとえば、電装ホルダ３０に保持された電装品および制御部３１を介して、積層方向の他方の端部に配置された二次電池１の負極の外部端子１Ｎに接合されたバスバー２に接続されている。 The electrical holder 30 is provided with input / output terminals 101 for a positive electrode and a negative electrode, respectively, at one end and the other end in the longitudinal direction. The input / output terminal 101 of the positive electrode is joined to the external terminal 1P of the positive electrode of the secondary battery 1 arranged at one end in the stacking direction via, for example, the electrical component held in the electrical holder 30 and the control unit 31. It is connected to the bus bar 2. The input / output terminal 101 of the negative electrode is joined to the external terminal 1N of the negative electrode of the secondary battery 1 arranged at the other end in the stacking direction via, for example, the electrical component held in the electrical holder 30 and the control unit 31. It is connected to the bus bar 2.

筐体４０は、たとえば、おおむね直方体形状の矩形箱形の形状を有し、複数の二次電池１およびプレート４，５，６を含む二次電池積層体１０と、補強部材２０と、制御部３１を含む電装ホルダ３０と、を収容している。筐体４０は、二次電池積層体１０の長さ方向（Ｘ軸方向）の寸法が、二次電池積層体１０の幅方向（Ｙ軸方向）の寸法よりも大きくなっている。すなわち、筐体４０は、底壁に垂直な二次電池積層体１０の高さ方向（Ｚ軸方向）と、この高さ方向に垂直な長手方向（Ｘ軸方向）と、これら長手方向および高さ方向に垂直な短手方向（Ｙ軸方向）と、を有する矩形箱形の形状に形成されている。 The housing 40 has, for example, a rectangular box-shaped shape having a substantially rectangular parallelepiped shape, and includes a secondary battery laminate 10 including a plurality of secondary batteries 1 and plates 4, 5 and 6, a reinforcing member 20, and a control unit. The electrical holder 30 including 31 is housed. In the housing 40, the dimension of the secondary battery laminate 10 in the length direction (X-axis direction) is larger than the dimension of the secondary battery laminate 10 in the width direction (Y-axis direction). That is, the housing 40 has a height direction (Z-axis direction) of the secondary battery laminate 10 perpendicular to the bottom wall, a longitudinal direction (X-axis direction) perpendicular to the height direction, and these longitudinal directions and heights. It is formed in a rectangular box shape having a lateral direction (Y-axis direction) perpendicular to the vertical direction.

筐体４０は、たとえば、上部が開放された矩形箱状の本体部４１と、本体部４１の上部の開口４１ａを覆うカバー４２とを有している。本体部４１の素材は、たとえば、電気亜鉛めっき鋼鈑などの金属材料であり、カバー４２の素材は、たとえば、ＰＢＴなどの樹脂材料である。筐体４０のカバー４２の短手方向の一端で長手方向の両端には、電池パック１００の正極および負極の入出力端子１０１，１０１を露出させる凹部および開口部が設けられている。また、筐体４０のカバーの入出力端子１０１，１０１が設けられた短手方向の一端には、筐体４０の長手方向における一対の入出力端子１０１の間で一方の入出力端子１０１に隣接する位置に、信号コネクタが設けられている。 The housing 40 has, for example, a rectangular box-shaped main body 41 having an open upper portion and a cover 42 covering the upper opening 41a of the main body 41. The material of the main body 41 is, for example, a metal material such as an electrogalvanized steel plate, and the material of the cover 42 is a resin material such as PBT. At one end in the lateral direction and both ends in the longitudinal direction of the cover 42 of the housing 40, recesses and openings for exposing the input / output terminals 101 and 101 of the positive and negative electrodes of the battery pack 100 are provided. Further, at one end of the cover of the housing 40 in the lateral direction provided with the input / output terminals 101 and 101, the pair of input / output terminals 101 in the longitudinal direction of the housing 40 are adjacent to one of the input / output terminals 101. A signal connector is provided at the position where the signal is connected.

複数の二次電池１を含む二次電池積層体１０は、筐体４０の片側に偏って配置されている。より詳細には、二次電池積層体１０は、おおむね直方体形状の筐体４０の短手方向、すなわち二次電池積層体１０の幅方向（Ｙ軸方向）において、筐体４０の一方の側壁に隣接して配置されている。二次電池積層体１０の幅方向（Ｙ軸方向）において二次電池積層体１０に隣接する筐体４０の側壁は、二次電池積層体１０の長さ方向（Ｘ軸方向）の一端から他端まで延びている。 The secondary battery laminate 10 including the plurality of secondary batteries 1 is unevenly arranged on one side of the housing 40. More specifically, the secondary battery laminate 10 is attached to one side wall of the housing 40 in the lateral direction of the substantially rectangular housing 40, that is, in the width direction (Y-axis direction) of the secondary battery stack 10. They are placed next to each other. The side wall of the housing 40 adjacent to the secondary battery laminate 10 in the width direction (Y-axis direction) of the secondary battery laminate 10 is from one end in the length direction (X-axis direction) of the secondary battery laminate 10 to the other. It extends to the end.

以下、本実施形態の電池パック１００の作用について説明する。 Hereinafter, the operation of the battery pack 100 of the present embodiment will be described.

本実施形態の電池パック１００は、前述のように、たとえばＥＶやＨＥＶなどの車両に搭載され、入出力端子１０１，１０１を介して電力が供給される。すると、電装ホルダ３０に保持された電装品および制御部３１と、複数のバスバー２とを介して入出力端子１０１，１０１に接続された複数の二次電池１が充電される。 As described above, the battery pack 100 of the present embodiment is mounted on a vehicle such as an EV or HEV, and power is supplied via the input / output terminals 101 and 101. Then, the plurality of secondary batteries 1 connected to the input / output terminals 101 and 101 via the electrical components and the control unit 31 held in the electrical holder 30 and the plurality of bus bars 2 are charged.

また、電池パック１００は、複数の二次電池１に充電された電力を、入出力端子１０１，１０１を介して、たとえば車両のモータなどの電気機器に供給する。たとえば、二次電池積層体１０を構成する二次電池１に何らかの異常が発生し、二次電池１の内圧が所定の圧力を超えると、二次電池１のガス排出弁１ｖが開裂して二次電池１の内部のガスが排出される。 Further, the battery pack 100 supplies the electric power charged in the plurality of secondary batteries 1 to an electric device such as a vehicle motor via the input / output terminals 101 and 101. For example, when an abnormality occurs in the secondary battery 1 constituting the secondary battery laminate 10 and the internal pressure of the secondary battery 1 exceeds a predetermined pressure, the gas discharge valve 1v of the secondary battery 1 is cleaved and secondary. The gas inside the next battery 1 is discharged.

ここで、本実施形態の電池パック１００は、前述のように、積層配置された複数の二次電池１と、補強部材２０と、を備えている。補強部材２０は、電池パック１００の一端から他端まで一方向に延びて電池パック１００を補強する補強部２１と、補強部材２０の一端から他端まで一方向に延びてその複数の二次電池１のガス排出弁１ｖが設けられた端面に対向するガス捕捉部２２と、を有している。 Here, the battery pack 100 of the present embodiment includes a plurality of secondary batteries 1 stacked and arranged, and a reinforcing member 20 as described above. The reinforcing member 20 extends in one direction from one end to the other end of the battery pack 100 to reinforce the battery pack 100, and a plurality of secondary batteries extending in one direction from one end to the other end of the reinforcing member 20. It has a gas trapping portion 22 facing the end surface provided with the gas discharge valve 1v of 1.

前述のように、二次電池１のガス排出弁１ｖから排出されたガスは、高温であるため、バスバーホルダ３を貫通し、ガス排出弁１ｖに対向する補強部材２０のガス捕捉部２２の幅広部に衝突する。ガス捕捉部２２の幅広部に衝突したガスは、凹溝状のガス捕捉部２２によって捕捉され、補強部材２０の一端から他端まで二次電池積層体１０の長さ方向（Ｘ軸方向）に延びるガス捕捉部２２内を流れ、たとえばガス捕捉部２２の端部などから二次電池積層体１０の外部へ排出される。これにより、異常時に二次電池１から排出されるガスを安全に排出することができる。 As described above, since the gas discharged from the gas discharge valve 1v of the secondary battery 1 has a high temperature, the gas capture portion 22 of the reinforcing member 20 that penetrates the bus bar holder 3 and faces the gas discharge valve 1v is wide. Collide with the part. The gas that collides with the wide portion of the gas trapping portion 22 is captured by the concave groove-shaped gas trapping portion 22, and is captured in the length direction (X-axis direction) of the secondary battery laminate 10 from one end to the other end of the reinforcing member 20. It flows through the extending gas trapping portion 22, and is discharged to the outside of the secondary battery laminate 10 from, for example, the end portion of the gas trapping portion 22. As a result, the gas discharged from the secondary battery 1 in the event of an abnormality can be safely discharged.

特に、補強部材２０が、亜鉛めっき鋼鈑などの金属製である場合には、二次電池１のガス排出弁１ｖから排出されたガスが、ガス捕捉部２２の幅広部に衝突して二次電池積層体１０の長さ方向（Ｘ軸方向）に流れる過程で、ガスの温度が低下し、気化した成分が液化する。これにより、白煙の発生などを低減することができ、二次電池１のガス排出弁１ｖから排出されたガスを安全に排出することができる。 In particular, when the reinforcing member 20 is made of a metal such as a zinc-plated steel plate, the gas discharged from the gas discharge valve 1v of the secondary battery 1 collides with the wide portion of the gas trapping portion 22 and is secondary. In the process of flowing in the length direction (X-axis direction) of the battery laminate 10, the temperature of the gas drops and the vaporized component liquefies. As a result, the generation of white smoke and the like can be reduced, and the gas discharged from the gas discharge valve 1v of the secondary battery 1 can be safely discharged.

また、たとえば車両の衝突時などに、電池パック１００に大きな外力が作用した場合に、電池パック１００の一端から他端まで一方向に延びる補強部材２０によって、電池パック１００に作用する外力を受け止めることができる。したがって、補強部材２０によって電池パック１００を補強して、電池パック１００に大きな外力が作用した場合の電池パック１００の圧壊強度を向上させることができる。 Further, when a large external force acts on the battery pack 100, for example, when a vehicle collides, the reinforcing member 20 extending in one direction from one end to the other end of the battery pack 100 receives the external force acting on the battery pack 100. Can be done. Therefore, the battery pack 100 can be reinforced by the reinforcing member 20 to improve the crushing strength of the battery pack 100 when a large external force acts on the battery pack 100.

さらに、電池パック１００を補強する補強部材２０が、複数の二次電池１のガス排出弁１ｖが設けられた端面である端子面１ａに対向するガス捕捉部２２を有している。そのため、一つの部材である補強部材２０によって、電池パック１００の補強と、二次電池１から排出されるガスの安全な排出との二つの役割を担うことができる。これにより、電池パック１００の補強を担う部材と、二次電池１から排出されるガスの安全な排出を担う部材とを、それぞれ別に設ける場合と比較して、電池パック１００を小型化することができる。 Further, the reinforcing member 20 for reinforcing the battery pack 100 has a gas trapping portion 22 facing the terminal surface 1a, which is an end surface provided with the gas discharge valves 1v of the plurality of secondary batteries 1. Therefore, the reinforcing member 20 which is one member can play two roles of reinforcing the battery pack 100 and safely discharging the gas discharged from the secondary battery 1. As a result, the battery pack 100 can be downsized as compared with the case where the member responsible for reinforcing the battery pack 100 and the member responsible for the safe discharge of the gas discharged from the secondary battery 1 are separately provided. can.

したがって、本実施形態の電池パック１００によれば、小型化の要求を満たしつつ、異常時に二次電池１から排出されるガスを安全に排出することができ、かつ車両の衝突時などに作用する大きな外力に耐えることができる。 Therefore, according to the battery pack 100 of the present embodiment, it is possible to safely discharge the gas discharged from the secondary battery 1 in the event of an abnormality while satisfying the demand for miniaturization, and it acts in the event of a vehicle collision or the like. Can withstand large external forces.

また、本実施形態の電池パック１００において、補強部材２０は、複数の二次電池１に対向する板状に設けられ、一方向（Ｘ軸方向）に交差する幅方向（Ｙ軸方向）から厚さ方向（Ｚ軸方向）へ屈曲された複数の屈曲部２１ａを有している。そして、屈曲部２１ａは、二次電池積層体１０の一端から他端まで延びている。 Further, in the battery pack 100 of the present embodiment, the reinforcing member 20 is provided in a plate shape facing the plurality of secondary batteries 1, and is thick from the width direction (Y-axis direction) intersecting in one direction (X-axis direction). It has a plurality of bent portions 21a bent in the radial direction (Z-axis direction). The bent portion 21a extends from one end to the other end of the secondary battery laminate 10.

この構成により、上記一方向、すなわち二次電池積層体１０の長さ方向（Ｘ軸方向）に作用する外力に対する補強部材２０の強度だけでなく、二次電池積層体１０の幅方向（Ｙ軸方向）や高さ方向（Ｚ軸方向）に作用する外力に対する強度も向上させることができる。したがって、補強部材２０によって電池パック１００をより確実に補強することができる。 With this configuration, not only the strength of the reinforcing member 20 with respect to the external force acting in the above-mentioned one direction, that is, the length direction (X-axis direction) of the secondary battery laminate 10, but also the width direction (Y-axis) of the secondary battery laminate 10. It is also possible to improve the strength against an external force acting in the direction) and the height direction (Z-axis direction). Therefore, the battery pack 100 can be more reliably reinforced by the reinforcing member 20.

また、本実施形態の電池パック１００において、二次電池積層体１０は、複数の二次電池１の一端と他端に配置されたプレート４，５を備えている。補強部材２０は、上記一方向すなわち二次電池積層体１０の長さ方向（Ｘ軸方向）に延びてプレート４，５に固定された平板状の固定部２３を備えている。さらに、補強部材２０の補強部２１は、固定部２３に連結されている。 Further, in the battery pack 100 of the present embodiment, the secondary battery laminate 10 includes plates 4 and 5 arranged at one end and the other end of the plurality of secondary batteries 1. The reinforcing member 20 includes a flat plate-shaped fixing portion 23 extending in one direction, that is, in the length direction (X-axis direction) of the secondary battery laminate 10 and fixed to the plates 4 and 5. Further, the reinforcing portion 21 of the reinforcing member 20 is connected to the fixing portion 23.

この構成により、固定部２３およびプレート４，５を介して補強部２１を強固に支持することができ、電池パック１００に作用した外力を補強部２１によってより確実に受け止めることができる。したがって、補強部材２０によって電池パック１００をより確実に補強することができる。 With this configuration, the reinforcing portion 21 can be firmly supported via the fixing portion 23 and the plates 4 and 5, and the external force acting on the battery pack 100 can be more reliably received by the reinforcing portion 21. Therefore, the battery pack 100 can be more reliably reinforced by the reinforcing member 20.

また、本実施形態の電池パック１００において、補強部材２０の補強部２１は、ガス捕捉部２２の幅方向（Ｙ軸方向）の両側に固定部２３を介して連結されている。 Further, in the battery pack 100 of the present embodiment, the reinforcing portions 21 of the reinforcing member 20 are connected to both sides of the gas capturing portion 22 in the width direction (Y-axis direction) via fixing portions 23.

この構成により、ガス捕捉部２２の両側を、ガス捕捉部２２よりも強度が高い補強部２１によって補強することができ、補強部材２０の強度をより効果的に向上させ、補強部材２０によって電池パック１００をより確実に補強することができる。また、前述のように、ガス捕捉部２２が複数の屈曲部２２ａ，２２ｂを備えることで、ガス捕捉部２２の強度を向上させ、補強部材２０によって電池パック１００をより確実に補強することができる。 With this configuration, both sides of the gas trapping portion 22 can be reinforced by the reinforcing portion 21 having a higher strength than the gas trapping portion 22, the strength of the reinforcing member 20 can be improved more effectively, and the battery pack is provided by the reinforcing member 20. The 100 can be reinforced more reliably. Further, as described above, since the gas trapping portion 22 includes the plurality of bent portions 22a and 22b, the strength of the gas capturing portion 22 can be improved, and the battery pack 100 can be more reliably reinforced by the reinforcing member 20. ..

また、本実施形態の電池パック１００は、複数の二次電池１に隣接して配置された制御部３１を備えている。そして、制御部３１は、上記一方向（Ｘ軸方向）に交差する二次電池積層体１０の幅方向（Ｙ軸方向）において、補強部材２０に隣接して配置されている。 Further, the battery pack 100 of the present embodiment includes a control unit 31 arranged adjacent to the plurality of secondary batteries 1. The control unit 31 is arranged adjacent to the reinforcing member 20 in the width direction (Y-axis direction) of the secondary battery laminate 10 intersecting the one direction (X-axis direction).

この構成により、たとえば車両の衝突時などに、電池パック１００に大きな外力が作用した場合に、電池パック１００の一端から他端まで一方向に延びる補強部材２０によって、電池パック１００に作用する外力を受け止め、制御部３１を保護することができる。 With this configuration, when a large external force acts on the battery pack 100, for example, when a vehicle collides, the reinforcing member 20 extending in one direction from one end to the other end of the battery pack 100 exerts an external force on the battery pack 100. It can receive and protect the control unit 31.

また、本実施形態の電池パック１００は、前述のように、筐体４０の少なくとも一部、たとえばカバー４２が、ＰＢＴなどの樹脂材料によって構成されている。 Further, as described above, in the battery pack 100 of the present embodiment, at least a part of the housing 40, for example, the cover 42, is made of a resin material such as PBT.

この構成により、筐体４０を軽量化することができる。また、樹脂材料によって構成された筐体４０の一部を補強部材２０によって補強することで、電池パック１００に必要な強度を確保することができる。 With this configuration, the weight of the housing 40 can be reduced. Further, by reinforcing a part of the housing 40 made of the resin material with the reinforcing member 20, the strength required for the battery pack 100 can be secured.

以上説明したように、本実施形態によれば、小型化の要求を満たしつつ、異常時に二次電池１から排出されるガスを安全に排出することができ、かつ車両の衝突時などに作用する大きな外力に耐え得る電池パック１００を提供することができる。なお、本開示に係る電池パックは、本実施形態の電池パック１００の構成に限定されない。以下、本実施形態の電池パック１００の一変形例について説明する。 As described above, according to the present embodiment, it is possible to safely discharge the gas discharged from the secondary battery 1 in the event of an abnormality while satisfying the demand for miniaturization, and it acts in the event of a vehicle collision or the like. It is possible to provide a battery pack 100 that can withstand a large external force. The battery pack according to the present disclosure is not limited to the configuration of the battery pack 100 of the present embodiment. Hereinafter, a modified example of the battery pack 100 of the present embodiment will be described.

図５Ａおよび図５Ｂは、それぞれ、図３Ａおよび図３Ｂに示す補強部材２０の変形例を示す平面図および側面図である。実施形態１に係る電池パック１００は、前述のように、複数の二次電池１、補強部材２０、およびプレート４，５，６を収容する筐体４０を備え、複数の二次電池１は、筐体４０の片側に偏って配置されている。本変形例において、補強部材２０は、筐体４０の側壁に沿って延びる第２ガス捕捉部２４を有している。 5A and 5B are a plan view and a side view showing a modification of the reinforcing member 20 shown in FIGS. 3A and 3B, respectively. As described above, the battery pack 100 according to the first embodiment includes a plurality of secondary batteries 1, a reinforcing member 20, and a housing 40 that houses the plates 4, 5, and 6, and the plurality of secondary batteries 1 include. It is unevenly arranged on one side of the housing 40. In this modification, the reinforcing member 20 has a second gas trapping portion 24 extending along the side wall of the housing 40.

この構成により、二次電池１に何らかの異常が発生してガス排出弁１ｖからガスが排出されたときに、二次電池１の端子面１ａに沿って二次電池積層体１０の幅方向（Ｙ軸方向）へ流れたガスを、第２ガス捕捉部２４へ導入して捕捉することができる。第２ガス捕捉部２４によって捕捉されたガスは、二次電池積層体１０の長さ方向（Ｘ軸方向）に沿う一方向へ延びる第２ガス捕捉部２４を流れ、ガス捕捉部２２を流れるガスと同様に、二次電池積層体１０から安全に排出される。 With this configuration, when some abnormality occurs in the secondary battery 1 and gas is discharged from the gas discharge valve 1v, the width direction (Y) of the secondary battery laminate 10 is along the terminal surface 1a of the secondary battery 1. The gas flowing in the axial direction) can be introduced into the second gas capturing unit 24 and captured. The gas captured by the second gas capture unit 24 flows through the second gas capture unit 24 extending in one direction along the length direction (X-axis direction) of the secondary battery laminate 10, and flows through the gas capture unit 22. Similarly, it is safely discharged from the secondary battery laminate 10.

また、第２ガス捕捉部２４は、筐体４０の側壁に沿って延びているので、筐体４０の側壁を第２ガス捕捉部２４の一部として機能させることができる。これにより、第２ガス捕捉部２４へ導入して捕捉したガスを、第２ガス捕捉部２４と筐体４０の側壁との協働により、二次電池積層体１０の長さ方向（Ｘ軸方向）の端部へ導くことができる。したがって、本変形例によれば、異常時に二次電池１から排出されるガスを、より安全に排出することができる。 Further, since the second gas trapping unit 24 extends along the side wall of the housing 40, the side wall of the housing 40 can function as a part of the second gas trapping unit 24. As a result, the gas introduced into the second gas trapping unit 24 and captured is taken in the length direction (X-axis direction) of the secondary battery laminate 10 by the cooperation between the second gas capturing unit 24 and the side wall of the housing 40. ) Can be led to the end. Therefore, according to this modification, the gas discharged from the secondary battery 1 in the event of an abnormality can be discharged more safely.

［実施形態２］
次に、前述の実施形態１で参照した図１および図４を援用し、図６Ａから図６Ｃを参照して、本開示に係る電池パックの実施形態２を説明する。[Embodiment 2]
Next, the second embodiment of the battery pack according to the present disclosure will be described with reference to FIGS. 1 and 4 referred to in the above-described first embodiment and with reference to FIGS. 6A to 6C.

図６Ａは、本開示の実施形態２に係る電池パックの二次電池積層体１０と補強部材２０Ａの平面図である。図６Ｂは、図６Ａに示す二次電池積層体１０と補強部材２０Ａの側面図である。図６Ｃは、図６Ａに示す二次電池積層体１０と補強部材２０Ａの正面図である。 FIG. 6A is a plan view of the secondary battery laminate 10 and the reinforcing member 20A of the battery pack according to the second embodiment of the present disclosure. FIG. 6B is a side view of the secondary battery laminate 10 and the reinforcing member 20A shown in FIG. 6A. FIG. 6C is a front view of the secondary battery laminate 10 and the reinforcing member 20A shown in FIG. 6A.

本実施形態の電池パックは、主に、次の点において、前述の実施形態１に係る電池パック１００と異なっている。第１に、複数の二次電池１は、二次電池積層体１０の幅方向（Ｙ軸方向）に積層されている。第２に、ガス捕捉部２２が複数の二次電池１と補強部２１との間に設けられ、補強部２１の幅方向、すなわち二次電池積層体１０の幅方向（Ｙ軸方向）に延びている。本実施形態の電池パックのその他の点は、前述の実施形態１に係る電池パック１００と同様であるので、同様の部分には同一の符号を付して説明を省略する。 The battery pack of the present embodiment is different from the battery pack 100 of the above-described first embodiment mainly in the following points. First, the plurality of secondary batteries 1 are laminated in the width direction (Y-axis direction) of the secondary battery laminate 10. Second, the gas trapping portion 22 is provided between the plurality of secondary batteries 1 and the reinforcing portion 21, and extends in the width direction of the reinforcing portion 21, that is, in the width direction (Y-axis direction) of the secondary battery laminate 10. ing. Since the other points of the battery pack of the present embodiment are the same as those of the battery pack 100 according to the first embodiment, the same reference numerals are given to the same parts and the description thereof will be omitted.

本実施形態の電池パックにおいて、補強部材２０Ａは、たとえば、第１補強部材２０Ａ１と第２補強部材２０Ａ２とを有している。第１補強部材２０Ａ１は、二次電池積層体１０の長さ方向（Ｘ軸方向）および幅方向（Ｙ軸方向）において、二次電池積層体１０の一端から他端まで延びる板状の部材である。第２補強部材２０Ａ２は、二次電池積層体１０の長さ方向（Ｘ軸方向）において、二次電池積層体１０の一端から他端まで延び、二次電池積層体１０の幅方向において、二次電池積層体１０の一端から中央部付近まで延びている。 In the battery pack of the present embodiment, the reinforcing member 20A has, for example, a first reinforcing member 20A1 and a second reinforcing member 20A2. The first reinforcing member 20A1 is a plate-shaped member extending from one end to the other end of the secondary battery laminate 10 in the length direction (X-axis direction) and the width direction (Y-axis direction) of the secondary battery laminate 10. be. The second reinforcing member 20A2 extends from one end to the other end of the secondary battery laminate 10 in the length direction (X-axis direction) of the secondary battery laminate 10, and is second in the width direction of the secondary battery laminate 10. It extends from one end of the next battery laminate 10 to the vicinity of the central portion.

本実施形態の電池パックにおいて、複数の二次電池１は、二次電池積層体１０の長さ方向（Ｘ軸方向）における一端に配置されたプレート４と、中央部に配置されたプレート５との間で、二次電池積層体１０の幅方向（Ｙ軸方向）に積層されている。また、複数の二次電池１は、二次電池積層体１０の長さ方向（Ｘ軸方向）における中央部に配置されたプレート５と、他端に配置されたプレート４との間で、二次電池積層体１０の幅方向（Ｙ軸方向）に積層されている。すなわち、二次電池積層体１０の長さ方向（Ｘ軸方向）において、プレート５の両側に二列の二次電池１が二次電池積層体１０の幅方向（Ｙ軸方向）に積層配置されている。 In the battery pack of the present embodiment, the plurality of secondary batteries 1 include a plate 4 arranged at one end in the length direction (X-axis direction) of the secondary battery laminate 10 and a plate 5 arranged at the center. The secondary battery laminate 10 is laminated in the width direction (Y-axis direction) between the two. Further, the plurality of secondary batteries 1 are provided between the plate 5 arranged at the center in the length direction (X-axis direction) of the secondary battery laminate 10 and the plate 4 arranged at the other end. The next battery laminate 10 is laminated in the width direction (Y-axis direction). That is, in the length direction (X-axis direction) of the secondary battery laminate 10, two rows of secondary batteries 1 are laminated and arranged on both sides of the plate 5 in the width direction (Y-axis direction) of the secondary battery laminate 10. ing.

第１補強部材２０Ａ１は、各列の複数の二次電池１のガス排出弁１ｖが設けられた端面である端子面１ａに対向し、補強部材２０Ａの一端から他端まで一方向（Ｙ軸方向）に延びるガス捕捉部２２を有している。ガス捕捉部２２は、たとえば、二次電池積層体１０の幅方向（Ｙ軸方向）において、電装ホルダ３０側の端部に開口しており、筐体４０の側壁側はおおむね閉塞されている。 The first reinforcing member 20A1 faces the terminal surface 1a, which is the end surface provided with the gas discharge valves 1v of the plurality of secondary batteries 1 in each row, and is unidirectional (Y-axis direction) from one end to the other end of the reinforcing member 20A. ), It has a gas trapping unit 22 extending to). For example, the gas trapping portion 22 is open to the end portion on the electrical holder 30 side in the width direction (Y-axis direction) of the secondary battery laminate 10, and the side wall side of the housing 40 is generally closed.

第１補強部材２０Ａ１は、二次電池積層体１０の長さ方向（Ｘ軸方向）における両端部と、ガス捕捉部２２，２２の間に、固定部２３を有している。固定部２３は、二次電池積層体１０の幅方向（Ｙ軸方向）の一端から他端まで一方向に延びている。二次電池積層体１０の長さ方向（Ｘ軸方向）における両端部の固定部２３は、プレート４，４に固定され、ガス捕捉部２２，２２の間の固定部２３は、プレート５に固定されている。 The first reinforcing member 20A1 has a fixing portion 23 between both ends of the secondary battery laminate 10 in the length direction (X-axis direction) and the gas trapping portions 22 and 22. The fixing portion 23 extends in one direction from one end to the other end in the width direction (Y-axis direction) of the secondary battery laminate 10. The fixing portions 23 at both ends of the secondary battery laminate 10 in the length direction (X-axis direction) are fixed to the plates 4 and 4, and the fixing portions 23 between the gas trapping portions 22 and 22 are fixed to the plate 5. Has been done.

第２補強部材２０Ａ２は、二次電池積層体１０の高さ方向（Ｚ軸方向）において、第１補強部材２０Ａ１の上方、すなわち、第１補強部材２０Ａ１よりも筐体４０のカバー４２側に配置されている。第２補強部材２０Ａ２は、二次電池積層体１０の長さ方向（Ｘ軸方向）に沿う一方向に延びてプレート４，５に固定された平板状の固定部２３を備えている。また、第２補強部材２０Ａ２の補強部２１は、二次電池積層体１０の幅方向（Ｙ軸方向）において、固定部２３の両側に連結され、二次電池積層体１０の長さ方向（Ｘ軸方向）において、二次電池積層体１０の一端から他端まで延びている。 The second reinforcing member 20A2 is arranged above the first reinforcing member 20A1 in the height direction (Z-axis direction) of the secondary battery laminate 10, that is, on the cover 42 side of the housing 40 with respect to the first reinforcing member 20A1. Has been done. The second reinforcing member 20A2 includes a flat plate-shaped fixing portion 23 extending in one direction along the length direction (X-axis direction) of the secondary battery laminate 10 and fixed to the plates 4 and 5. Further, the reinforcing portion 21 of the second reinforcing member 20A2 is connected to both sides of the fixing portion 23 in the width direction (Y-axis direction) of the secondary battery laminate 10, and is connected to both sides of the secondary battery laminate 10 in the length direction (X). In the axial direction), it extends from one end to the other end of the secondary battery laminate 10.

また、本実施形態の電池パックにおいて、二次電池積層体１０の長さ方向（Ｘ軸方向）の両端に配置されたプレート４，４は、二次電池積層体１０の高さ方向（Ｚ軸方向）における上端面に、段差を有している。この段差により、プレート４の上端面は、二次電池積層体１０の幅方向（Ｙ軸方向）において、電装ホルダ３０に隣接する前端部が、筐体４０の側壁に隣接する後端部よりも、二次電池積層体１０の高さ方向（Ｚ軸方向）における上方、すなわち筐体４０の本体部４１側へ突出している。 Further, in the battery pack of the present embodiment, the plates 4 and 4 arranged at both ends of the secondary battery laminate 10 in the length direction (X-axis direction) are the height direction (Z-axis) of the secondary battery laminate 10. There is a step on the upper end surface in the direction). Due to this step, the upper end surface of the plate 4 has a front end portion adjacent to the electrical holder 30 in the width direction (Y-axis direction) of the secondary battery laminate 10 rather than a rear end portion adjacent to the side wall of the housing 40. , The secondary battery laminate 10 projects upward in the height direction (Z-axis direction), that is, toward the main body 41 side of the housing 40.

補強部材２０Ａは、二次電池積層体１０の長さ方向（Ｘ軸方向）における第１補強部材２０Ａ１の両端部の固定部２３が、プレート４，４の上端面の後端部に固定されている。また、補強部材２０Ａは、二次電池積層体１０の長さ方向（Ｘ軸方向）における第２補強部材２０Ａ２の両端部の固定部２３が、プレート４，４の上端面の後端部よりも高さ方向（Ｚ軸方向）における上方へ突出した前端部に固定されている。これにより、補強部材２０Ａは、第２補強部材２０Ａ２が第１補強部材２０Ａ１よりも高さ方向（Ｚ軸方向）の上方、すなわち筐体４０の本体部４１側に配置されている。 In the reinforcing member 20A, the fixing portions 23 at both ends of the first reinforcing member 20A1 in the length direction (X-axis direction) of the secondary battery laminate 10 are fixed to the rear end portions of the upper end surfaces of the plates 4 and 4. There is. Further, in the reinforcing member 20A, the fixing portions 23 at both ends of the second reinforcing member 20A2 in the length direction (X-axis direction) of the secondary battery laminate 10 are more than the rear end portions of the upper end surfaces of the plates 4 and 4. It is fixed to the front end portion that protrudes upward in the height direction (Z-axis direction). As a result, in the reinforcing member 20A, the second reinforcing member 20A2 is arranged above the first reinforcing member 20A1 in the height direction (Z-axis direction), that is, on the main body 41 side of the housing 40.

以下、本実施形態の電池パックの作用について説明する。 Hereinafter, the operation of the battery pack of the present embodiment will be described.

本実施形態の電池パックは、前述の実施形態１に係る電池パック１００と同様に、たとえばＥＶやＨＥＶなどの車両に搭載され、入出力端子１０１，１０１を介して電力が供給され、複数の二次電池１が充電される。また、本実施形態の電池パックは、前述の実施形態１の電池パック１００と同様に、複数の二次電池１に充電された電力を、入出力端子１０１，１０１を介して、たとえば車両のモータなどの電気機器に供給する。 Similar to the battery pack 100 according to the first embodiment, the battery pack of the present embodiment is mounted on a vehicle such as an EV or HEV, and power is supplied via the input / output terminals 101 and 101, and a plurality of two batteries are supplied. The next battery 1 is charged. Further, in the battery pack of the present embodiment, similarly to the battery pack 100 of the above-described first embodiment, the electric power charged in the plurality of secondary batteries 1 is transferred to the motors of the vehicle, for example, via the input / output terminals 101 and 101. Supply to electrical equipment such as.

たとえば、二次電池積層体１０を構成する二次電池１に何らかの異常が発生して内圧が上昇し、二次電池１の内圧が所定の圧力を超えると、二次電池１のガス排出弁１ｖが開裂して二次電池１の内部のガスが排出される。 For example, when an abnormality occurs in the secondary battery 1 constituting the secondary battery laminate 10 and the internal pressure rises, and the internal pressure of the secondary battery 1 exceeds a predetermined pressure, the gas discharge valve 1v of the secondary battery 1 Cleaves and the gas inside the secondary battery 1 is discharged.

ここで、本実施形態の電池パックは、前述の実施形態１の電池パック１００と同様に、積層配置された複数の二次電池１と、補強部材２０Ａと、を備えている。補強部材２０Ａは、電池パックの一端から他端まで一方向に延びて電池パックを補強する補強部２１と、補強部材２０Ａの一端から他端まで一方向に延びて複数の二次電池１のガス排出弁１ｖが設けられた端面に対向するガス捕捉部２２，２２と、を有している。 Here, the battery pack of the present embodiment includes a plurality of secondary batteries 1 stacked and arranged, and a reinforcing member 20A, similarly to the battery pack 100 of the above-described first embodiment. The reinforcing member 20A extends from one end to the other end of the battery pack in one direction to reinforce the battery pack, and the reinforcing member 20A extends from one end to the other end of the reinforcing member 20A in one direction to reinforce the battery pack. It has gas trapping portions 22, 22 facing the end face provided with the discharge valve 1v.

したがって、本実施形態の電池パックによれば、前述の実施形態１の電池パック１００と同様に、小型化の要求を満たしつつ、異常時に二次電池１から排出されるガスを安全に排出することができ、かつ車両の衝突時などに作用する大きな外力に耐えることができる。 Therefore, according to the battery pack of the present embodiment, similarly to the battery pack 100 of the above-described first embodiment, the gas discharged from the secondary battery 1 is safely discharged in the event of an abnormality while satisfying the demand for miniaturization. And can withstand a large external force acting in the event of a vehicle collision.

また、本実施形態の電池パックにおいて、補強部２１は、複数の二次電池１に対向する板状に設けられ、二次電池積層体１０の幅方向（Ｙ軸方向）から厚さ方向（Ｚ軸方向）へ屈曲された複数の屈曲部２１ａを有している。屈曲部２１ａは、二次電池積層体１０の長さ方向（Ｘ軸方向）において、電池パックの一端から他端まで延びている。 Further, in the battery pack of the present embodiment, the reinforcing portion 21 is provided in a plate shape facing the plurality of secondary batteries 1, and is provided in a plate shape facing the plurality of secondary batteries 1 from the width direction (Y-axis direction) to the thickness direction (Z) of the secondary battery laminate 10. It has a plurality of bent portions 21a bent in the axial direction). The bent portion 21a extends from one end to the other end of the battery pack in the length direction (X-axis direction) of the secondary battery laminate 10.

この構成により、実施形態１の電池パック１００と同様に、上記一方向、すなわち、二次電池積層体１０の長さ方向（Ｘ軸方向）に作用する外力に対する補強部材２０Ａの強度を向上させることができる。さらに、二次電池積層体１０の幅方向（Ｙ軸方向）および高さ方向（Ｚ軸方向）に作用する外力に対する補強部材２０Ａの強度も向上させることができる。したがって、補強部材２０Ａによって電池パックをより確実に補強することができる。 With this configuration, similarly to the battery pack 100 of the first embodiment, the strength of the reinforcing member 20A against the external force acting in the above-mentioned one direction, that is, in the length direction (X-axis direction) of the secondary battery laminate 10 is improved. Can be done. Further, the strength of the reinforcing member 20A against external forces acting in the width direction (Y-axis direction) and the height direction (Z-axis direction) of the secondary battery laminate 10 can be improved. Therefore, the battery pack can be reinforced more reliably by the reinforcing member 20A.

また、本実施形態の電池パックは、実施形態１の電池パック１００と同様に、二次電池積層体１０が、複数の二次電池１の一端と他端に配置されたプレート４，５を備えている。補強部材２０Ａの第２補強部材２０Ａ２は、上記一方向すなわち二次電池積層体１０の長さ方向（Ｘ軸方向）に延びてプレート４，５に固定された平板状の固定部２３を備えている。さらに、第２補強部材２０Ａ２の補強部２１は、固定部２３に連結されている。 Further, the battery pack of the present embodiment includes plates 4 and 5 in which the secondary battery laminate 10 is arranged at one end and the other end of the plurality of secondary batteries 1, similarly to the battery pack 100 of the first embodiment. ing. The second reinforcing member 20A2 of the reinforcing member 20A includes a flat plate-shaped fixing portion 23 extending in one direction, that is, in the length direction (X-axis direction) of the secondary battery laminate 10 and fixed to the plates 4 and 5. There is. Further, the reinforcing portion 21 of the second reinforcing member 20A2 is connected to the fixing portion 23.

この構成により、固定部２３およびプレート４，５を介して補強部２１を強固に支持することができ、電池パック１００に作用した外力を補強部２１によってより確実に受け止めることができる。したがって、補強部材２０によって電池パック１００をより確実に補強することができる。 With this configuration, the reinforcing portion 21 can be firmly supported via the fixing portion 23 and the plates 4 and 5, and the external force acting on the battery pack 100 can be more reliably received by the reinforcing portion 21. Therefore, the battery pack 100 can be more reliably reinforced by the reinforcing member 20.

また、本実施形態の電池パックにおいて、第１補強部材２０Ａ１のガス捕捉部２２，２２は、複数の二次電池１と第２補強部材２０Ａ２の補強部２１との間に設けられ、補強部２１の幅方向、すなわち二次電池積層体１０の幅方向（Ｙ軸方向）に延びている。 Further, in the battery pack of the present embodiment, the gas trapping portions 22 and 22 of the first reinforcing member 20A1 are provided between the plurality of secondary batteries 1 and the reinforcing portion 21 of the second reinforcing member 20A2, and the reinforcing portion 21 is provided. In the width direction of, that is, in the width direction (Y-axis direction) of the secondary battery laminate 10.

この構成により、複数の二次電池１を二次電池積層体１０の幅方向（Ｙ軸方向）に積層させる場合に、補強部材２０Ａのガス捕捉部２２，２２を複数の二次電池１のガス排出弁１ｖに対向させて配置することができる。また、ガス捕捉部２２，２２と交差する方向に延びる補強部材２０Ａの補強部２１によって、二次電池積層体１０の長さ方向（Ｘ軸方向）、幅方向（Ｙ軸方向）、および高さ方向（Ｚ軸方向）において、電池パックを補強することができる。 With this configuration, when a plurality of secondary batteries 1 are laminated in the width direction (Y-axis direction) of the secondary battery laminate 10, the gas trapping portions 22 and 22 of the reinforcing member 20A are combined with the gas of the plurality of secondary batteries 1. It can be arranged so as to face the discharge valve 1v. Further, the reinforcing portion 21 of the reinforcing member 20A extending in the direction intersecting the gas trapping portions 22 and 22 allows the secondary battery laminate 10 to have a length direction (X-axis direction), a width direction (Y-axis direction), and a height. The battery pack can be reinforced in the direction (Z-axis direction).

したがって、本実施形態によれば、実施形態１と同様に、小型化の要求を満たしつつ、異常時に二次電池１から排出されるガスを安全に排出することができ、かつ車両の衝突時などに作用する大きな外力に耐え得る電池パックを提供することができる。 Therefore, according to the present embodiment, as in the first embodiment, the gas discharged from the secondary battery 1 can be safely discharged in the event of an abnormality while satisfying the demand for miniaturization, and in the event of a vehicle collision or the like. It is possible to provide a battery pack that can withstand a large external force acting on the battery.

以上、図面を用いて本開示に係る電池パックの実施形態を詳述してきたが、具体的な構成はこの実施形態に限定されるものではなく、本開示の要旨を逸脱しない範囲における設計変更等があっても、それらは本開示に含まれるものである。たとえば、補強部の屈曲部の形状は、特に限定されない。図７は、前述の実施形態１および２の電池パックの補強部材２０，２０Ａの変形例を示す概念図である。 Although the embodiment of the battery pack according to the present disclosure has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like are made without departing from the gist of the present disclosure. If any, they are included in this disclosure. For example, the shape of the bent portion of the reinforcing portion is not particularly limited. FIG. 7 is a conceptual diagram showing a modified example of the reinforcing members 20 and 20A of the battery packs of the above-described first and second embodiments.

図７に示すように、補強部２１は、鋭角に屈曲された複数の屈曲部２１ａを有する三角波状の形状を有してもよく、おおむね直角に屈曲された複数の屈曲部２１ａを有する矩形波状の形状を有してもよい。また、補強部２１は、全体として矩形波状の形状を有するとともに、補強部２１に凹凸を形成する複数の屈曲部２１ａを有してもよい。 As shown in FIG. 7, the reinforcing portion 21 may have a triangular wavy shape having a plurality of bent portions 21a bent at an acute angle, and may have a rectangular wavy shape having a plurality of bent portions 21a bent at a substantially right angle. May have the shape of. Further, the reinforcing portion 21 may have a rectangular wavy shape as a whole, and may have a plurality of bending portions 21a forming irregularities on the reinforcing portion 21.

１ 二次電池
１ｖ ガス排出弁
４ プレート
５ プレート
２０ 補強部材
２１ 補強部
２１ａ 屈曲部
２１ｂ 屈曲部
２２ ガス捕捉部
２３ 固定部
２４ 第２ガス捕捉部
３１ 制御部
４０ 筐体
１００ 電池パック1 Secondary battery 1v Gas discharge valve 4 Plate 5 Plate 20 Reinforcing member 21 Reinforcing part 21a Bending part 21b Bending part 22 Gas catching part 23 Fixed part 24 Second gas catching part 31 Control part 40 Housing 100 Battery pack

Claims (5)

積層配置された複数の二次電池と補強部材とを備え、長さ方向の寸法が幅方向の寸法よりも大きく、高さ方向の寸法が前記幅方向の寸法よりも小さい電池パックであって、
前記長さ方向における前記複数の二次電池の一端と他端に配置されたプレートを備え、
前記補強部材は、前記電池パックの一端から他端まで前記長さ方向に延びて前記電池パックを補強する補強部と、前記補強部材の一端から他端まで前記複数の二次電池の積層方向に延びて該複数の二次電池のガス排出弁が設けられた端面に対向するガス捕捉部と、前記長さ方向に延びて前記プレートに固定された平板状の固定部と、を有し、
前記補強部は、前記複数の二次電池に対向する板状に設けられ、前記高さ方向へ屈曲され、前記長さ方向において前記複数の二次電池の一端から他端まで延びている複数の屈曲部を有し、前記ガス捕捉部の両側に前記固定部を介して連結されていることを特徴とする電池パック。 A battery pack comprising a plurality of stacked secondary batteries and reinforcing members, having a length direction larger than a width direction dimension and a height direction dimension smaller than the width direction dimension .
A plate arranged at one end and the other end of the plurality of secondary batteries in the length direction is provided.
The reinforcing member extends from one end to the other end of the battery pack in the length direction to reinforce the battery pack, and the reinforcing member extends from one end to the other end of the reinforcing member in the stacking direction of the plurality of secondary batteries. It has a gas trapping portion that extends and faces an end surface provided with gas discharge valves of the plurality of secondary batteries, and a flat plate-shaped fixing portion that extends in the length direction and is fixed to the plate .
The reinforcing portion is provided in a plate shape facing the plurality of secondary batteries, is bent in the height direction, and extends from one end to the other end of the plurality of secondary batteries in the length direction. A battery pack having a bent portion and being connected to both sides of the gas trapping portion via the fixing portion . 積層配置された複数の二次電池と補強部材とを備え、長さ方向の寸法が幅方向の寸法よりも大きく、高さ方向の寸法が前記幅方向の寸法よりも小さい電池パックであって、
前記長さ方向における前記複数の二次電池の一端と他端に配置されたプレートを備え、
前記補強部材は、前記電池パックの一端から他端まで前記長さ方向に延びて前記電池パックを補強する補強部と、前記補強部材の一端から他端まで前記複数の二次電池の積層方向に延びて該複数の二次電池のガス排出弁が設けられた端面に対向するガス捕捉部と、前記長さ方向に延びて前記プレートに固定された平板状の固定部と、を有し、
前記補強部は、前記複数の二次電池に対向する板状に設けられ、前記高さ方向へ屈曲され、前記長さ方向において前記複数の二次電池の一端から他端まで延びている複数の屈曲部を有し、前記固定部に連結され、
前記ガス捕捉部は、前記複数の二次電池と前記補強部との間に設けられ、前記幅方向に延びていることを特徴とする電池パック。 A battery pack comprising a plurality of stacked secondary batteries and reinforcing members, having a length direction larger than a width direction dimension and a height direction dimension smaller than the width direction dimension.
A plate arranged at one end and the other end of the plurality of secondary batteries in the length direction is provided.
The reinforcing member extends from one end to the other end of the battery pack in the length direction to reinforce the battery pack, and the reinforcing member extends from one end to the other end of the reinforcing member in the stacking direction of the plurality of secondary batteries. It has a gas trapping portion that extends and faces an end surface provided with gas discharge valves of the plurality of secondary batteries, and a flat plate-shaped fixing portion that extends in the length direction and is fixed to the plate.
The reinforcing portion is provided in a plate shape facing the plurality of secondary batteries, is bent in the height direction, and extends from one end to the other end of the plurality of secondary batteries in the length direction. It has a bent portion and is connected to the fixed portion.
A battery pack characterized in that the gas trapping portion is provided between the plurality of secondary batteries and the reinforcing portion and extends in the width direction. 前記複数の二次電池、前記補強部材、および前記プレートを収容する筐体を備え、
前記複数の二次電池は、前記筐体の片側に偏って配置され、
前記補強部材は、前記筐体の側壁に沿って延びる第２ガス捕捉部を有することを特徴とする請求項１に記載の電池パック。 A housing for accommodating the plurality of secondary batteries, the reinforcing member, and the plate is provided.
The plurality of secondary batteries are arranged unevenly on one side of the housing.
The battery pack according to claim 1 , wherein the reinforcing member has a second gas trapping portion extending along a side wall of the housing. 前記複数の二次電池に隣接して配置された制御部を備え、
前記制御部は、前記幅方向において前記補強部材に隣接して配置されていることを特徴とする請求項１または請求項２に記載の電池パック。 A control unit arranged adjacent to the plurality of secondary batteries is provided.
The battery pack according to claim 1 or 2 , wherein the control unit is arranged adjacent to the reinforcing member in the width direction. 前記筐体の少なくとも一部は、樹脂材料によって構成されていることを特徴とする請求項３に記載の電池パック。 The battery pack according to claim 3 , wherein at least a part of the housing is made of a resin material.
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