JP6988733B2 - Battery pack - Google Patents

Battery pack Download PDF

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JP6988733B2
JP6988733B2 JP2018147686A JP2018147686A JP6988733B2 JP 6988733 B2 JP6988733 B2 JP 6988733B2 JP 2018147686 A JP2018147686 A JP 2018147686A JP 2018147686 A JP2018147686 A JP 2018147686A JP 6988733 B2 JP6988733 B2 JP 6988733B2
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battery
battery module
terminal
connecting member
connection
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JP2020024801A (en
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泰正 小熊
吉宏 岩野
健一郎 中嶋
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Toyota Motor 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

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  • Connection Of Batteries Or Terminals (AREA)

Description

本発明は、電池パックに関する。 The present invention relates to a battery pack.

従来から、複数の平板状電池を電気的に接続してモジュール化して電池モジュールとし、複数の電池モジュールをケース内に収容して電池パックとしたものが公知である（例えば、特許文献１参照）。また、斯かる電池パックにおいて、電池モジュール同士の接続を電池モジュールの外部に設けられたワイヤーハーネスによって行うことが検討されている（例えば、特許文献１参照）。 Conventionally, it has been known that a plurality of flat plates are electrically connected to be modularized into a battery module, and a plurality of battery modules are housed in a case to form a battery pack (see, for example, Patent Document 1). .. Further, in such a battery pack, it has been studied to connect the battery modules to each other by a wire harness provided outside the battery modules (see, for example, Patent Document 1).

特開２０１０−２８７５１６号公報Japanese Unexamined Patent Publication No. 2010-287516

ところで、特許文献１に記載の電池パックでは、隣り合う電池モジュールの端子同士が、電池モジュール上を横切るように延びるワイヤーハーネスによって接続されている。このようなワイヤーハーネスには、例えば、電池パックを自動車のモーター駆動用に用いるような場合には急速充電等に伴って大きな電流が流れることになるため、ワイヤーハーネスを太くすることが必要になる。このため、電池モジュールの外部に太さのあるワイヤーハーネスを設置することが必要になり、よって電池パックの体積エネルギ密度の低下を招く。 By the way, in the battery pack described in Patent Document 1, the terminals of adjacent battery modules are connected to each other by a wire harness extending so as to cross over the battery modules. For example, when a battery pack is used for driving a motor of an automobile, a large current flows through such a wire harness due to quick charging or the like, so that it is necessary to make the wire harness thicker. .. Therefore, it is necessary to install a thick wire harness outside the battery module, which causes a decrease in the volume energy density of the battery pack.

本発明は、上記課題に鑑みてなされたものであり、その目的は、電池モジュールの外部に電池モジュール間の接続部材を設けることに伴う体積エネルギ密度の低下を抑制することにある。 The present invention has been made in view of the above problems, and an object of the present invention is to suppress a decrease in volume energy density due to provision of a connecting member between battery modules outside the battery module.

本発明は、上記課題を解決するためになされたものであり、その要旨とするところは、積層された複数の平板状電池をそれぞれ含む複数の電池モジュールが配置された電池パックであって、前記複数の電池モジュールは、同一平面上において前記複数の平板状電池の積層方向に直交する方向に並んで配列され、前記複数の電池モジュールの各々は、前記平板状電池の積層方向において前記平板状電池と並列に配置された板状の本体を有する第１の接続部材と、前記平板状電池の積層方向において前記平板状電池及び前記第１の接続部材と並列に配置された板状の本体を有する第２の接続部材と、を備え、前記電池モジュールにおける前記第１の接続部材は、当該電池モジュールの前記平板状電池と、隣接する前記電池モジュールの前記平板状電池とに接続され、並んで配列された前記複数の電池モジュールのうち一方の端に配置された電池モジュールの前記第２の接続部材は、当該電池モジュールの前記平板状電池と接続されており、隣り合う前記電池モジュールの前記第２の接続部材同士は、互いに接続されている、電池パックである。 The present invention has been made in order to solve the above problems, and the gist thereof is a battery pack in which a plurality of battery modules including a plurality of stacked flat plates are arranged. The plurality of battery modules are arranged side by side on the same plane in a direction orthogonal to the stacking direction of the plurality of flat batteries, and each of the plurality of battery modules is the flat battery in the stacking direction of the flat batteries. It has a first connecting member having a plate-shaped main body arranged in parallel with the flat plate-shaped battery, and a plate-shaped main body arranged in parallel with the flat plate-shaped battery and the first connecting member in the stacking direction of the flat plate-shaped battery. A second connecting member is provided, and the first connecting member in the battery module is connected to the flat plate battery of the battery module and the flat plate battery of the adjacent battery module, and is arranged side by side. The second connecting member of the battery module arranged at one end of the plurality of battery modules is connected to the flat plate battery of the battery module, and the second connecting member of the adjacent battery modules is connected to the plate-shaped battery. The connecting members of the above are battery packs that are connected to each other.

本発明によれば、電池モジュールの外部に電池モジュール間の接続部材を設けることに伴う体積エネルギ密度の低下を抑制することができる。 According to the present invention, it is possible to suppress a decrease in volume energy density due to the provision of a connecting member between battery modules outside the battery module.

図１は、本発明の第１の実施形態に係る電池パック１を概略的に示す斜視図である。FIG. 1 is a perspective view schematically showing a battery pack 1 according to the first embodiment of the present invention. 図２は、電池パックカバー３を取り外した状態における、本発明の第１の実施形態に係る電池パック１を概略的に示す平面図である。FIG. 2 is a plan view schematically showing the battery pack 1 according to the first embodiment of the present invention in a state where the battery pack cover 3 is removed. 図３は、電池モジュールの一部を概略的に示す分解斜視図である。FIG. 3 is an exploded perspective view schematically showing a part of the battery module. 図４は、各電池素子の概略的な断面図である。FIG. 4 is a schematic cross-sectional view of each battery element. 図５は、接続部材を概略的に示す斜視図である。FIG. 5 is a perspective view schematically showing the connecting member. 図６は、電池パックカバー３を取り外した状態における、本発明の第１の実施形態に係る電池パック１の電流経路を示す平面図である。FIG. 6 is a plan view showing a current path of the battery pack 1 according to the first embodiment of the present invention in a state where the battery pack cover 3 is removed. 図７は、本発明の第２の実施形態に係る電池パック１０１を概略的に示す斜視図である。FIG. 7 is a perspective view schematically showing the battery pack 101 according to the second embodiment of the present invention. 図８は、電池パックカバー１０３を取り外した状態における、本発明の第２の実施形態に係る電池パック１０１を概略的に示す平面図である。FIG. 8 is a plan view schematically showing the battery pack 101 according to the second embodiment of the present invention in a state where the battery pack cover 103 is removed. 図９は、電池パックカバー１０３を取り外した状態における、本発明の第２の実施形態に係る電池パック１０１の電流経路を示す平面図である。FIG. 9 is a plan view showing a current path of the battery pack 101 according to the second embodiment of the present invention in a state where the battery pack cover 103 is removed.

以下、図面を参照して本発明の実施形態について詳細に説明する。なお、以下の説明では、同様な構成要素には同一の参照番号を付す。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, similar components are given the same reference numbers.

＜第１の実施形態＞
≪電池パックの構成要素≫
図１は、本発明の第１の実施形態に係る電池パック１を概略的に示す斜視図である。電池パック１は、例えば、電気自動車（ＥＶ）又はハイブリッド自動車（ＨＶ）における車室のフロアパネルの下側に配置される。電池パック１は、後述する電子機器９及び電池モジュール１０を収容する電池パックケース２と、電池パックケース２の開口部を閉鎖する電池パックカバー３と、を有する。電池パックカバー３には、２つの開口部が形成される。電池パックカバー３の２つの開口部を通って電池パック１内の複数の電池モジュール１０の充放電を行うための第１及び第２の電池端子４及び５が電池パック１の外部に延びる。第１の電池端子４は第２の電池端子５とは極性が異なる。なお、図示した実施形態では、第１及び第２の電池端子４及び５は、電池パックカバー３を通って電池パック１の内部から外部に延びるように形成されているが、電池パックケース２を通って電池パック１の内部から外部に延びるように形成されてもよい。また、第１及び第２の電池端子４及び５は、電池パックケース２や電池パックカバー３に直接取り付けられてもよい。 <First Embodiment>
≪Battery pack components≫
FIG. 1 is a perspective view schematically showing a battery pack 1 according to the first embodiment of the present invention. The battery pack 1 is arranged, for example, under the floor panel of the passenger compartment in an electric vehicle (EV) or a hybrid vehicle (HV). The battery pack 1 has a battery pack case 2 for accommodating an electronic device 9 and a battery module 10 described later, and a battery pack cover 3 for closing the opening of the battery pack case 2. Two openings are formed in the battery pack cover 3. The first and second battery terminals 4 and 5 for charging and discharging the plurality of battery modules 10 in the battery pack 1 extend to the outside of the battery pack 1 through the two openings of the battery pack cover 3. The first battery terminal 4 has a different polarity from the second battery terminal 5. In the illustrated embodiment, the first and second battery terminals 4 and 5 are formed so as to extend from the inside of the battery pack 1 to the outside through the battery pack cover 3, but the battery pack case 2 is used. It may be formed so as to extend from the inside of the battery pack 1 to the outside through the battery pack 1. Further, the first and second battery terminals 4 and 5 may be directly attached to the battery pack case 2 or the battery pack cover 3.

図２は、電池パックカバー３を取り外した状態における、本発明の第１の実施形態に係る電池パック１を概略的に示す平面図である。なお、本明細書では、便宜上、図２において電子機器９が設けられている側を前、前と反対側を後、平板状電池２１に対して後述する第２の接続部材２４が設けられている側を右、右と反対側を左として説明する。しかしながら、これは電池パック１が車両に対して取り付けられる向きを規定するものではなく、電池パック１は車両に対してどのような向きに配置されてもよい。 FIG. 2 is a plan view schematically showing the battery pack 1 according to the first embodiment of the present invention in a state where the battery pack cover 3 is removed. In this specification, for convenience, a second connecting member 24, which will be described later, is provided for the flat-plate battery 21 with the side on which the electronic device 9 is provided in front and the opposite side in the rear. The side that is on the right side is described as the right side, and the side opposite to the right side is described as the left side. However, this does not specify the orientation in which the battery pack 1 is attached to the vehicle, and the battery pack 1 may be arranged in any orientation with respect to the vehicle.

図２に示したように、電池パックケース２内には、電子機器９と、複数の電池モジュール１０と、第１及び第２の電池端子４及び５と、が配置される。図２に示した例では、電子機器９は、電池パックケース２の前側の領域に配置され、複数の電池モジュール１０は、全て電子機器９よりも後側に配置される。なお、電子機器９は、複数の電池モジュール１０の間等、如何なる位置に設けられてもよい。また、図２に示した例では、第１の電池端子４を正極とし、第２の電池端子５を負極としたが、第１の電池端子４を負極とし、第２の電池端子５を正極としてもよい。 As shown in FIG. 2, an electronic device 9, a plurality of battery modules 10, and first and second battery terminals 4 and 5 are arranged in the battery pack case 2. In the example shown in FIG. 2, the electronic device 9 is arranged in the front region of the battery pack case 2, and the plurality of battery modules 10 are all arranged behind the electronic device 9. The electronic device 9 may be provided at any position, such as between a plurality of battery modules 10. Further, in the example shown in FIG. 2, the first battery terminal 4 is a positive electrode and the second battery terminal 5 is a negative electrode, but the first battery terminal 4 is a negative electrode and the second battery terminal 5 is a positive electrode. May be.

電子機器９は、例えば、電池パック１内の電池モジュール１０や電池モジュール１０を構成する平板状電池２１の状態を検出したり、又はこれらを制御したりする機器を含む。したがって、電子機器９は、例えば、ワイヤーハーネスにより各電池モジュール１０に接続されて、各電池モジュール１０の両端子間の電圧等を検出する。 The electronic device 9 includes, for example, a device for detecting or controlling the state of the battery module 10 in the battery pack 1 and the flat plate battery 21 constituting the battery module 10. Therefore, the electronic device 9 is connected to each battery module 10 by, for example, a wire harness, and detects a voltage or the like between both terminals of each battery module 10.

≪電池モジュールの構成≫
図２に示したように、電池モジュール１０は、積層された複数の平板状電池２１と、平板状電池２１の積層方向において複数の平板状電池２１の両側に配置された外側固定部材２２と、平板状電池２１の積層方向において平板状電池２１と並列に配置された板状の第１の接続部材２３と、平板状電池２１の積層方向において平板状電池２１及び第１の接続部材２３と並列に配置された板状の第２の接続部材２４と、を備える。 ≪Battery module configuration≫
As shown in FIG. 2, the battery module 10 includes a plurality of laminated flat battery 21 and outer fixing members 22 arranged on both sides of the plurality of flat batteries 21 in the stacking direction of the flat batteries 21. The plate-shaped first connecting member 23 arranged in parallel with the flat plate-shaped battery 21 in the stacking direction of the flat plate-shaped battery 21 and parallel to the flat plate-shaped battery 21 and the first connecting member 23 in the stacking direction of the flat plate-shaped battery 21. A plate-shaped second connecting member 24, which is arranged in the above, is provided.

図３は、１つの電池モジュール１０の一部を概略的に示す分解斜視図である。図３では、平板状電池２１、外側固定部材２２、第１の接続部材２３及び第２の接続部材２４が互いに離間された状態で示されている。しかし、実際には、平板状電池２１と第１の接続部材２３とは、後述する絶縁性部材３５を介して互いに面接触するように配置され、第１及び第２の接続部材２３及び２４と外側固定部材２２とは、それぞれ絶縁性部材３５を介して互いに面接触するように配置される。 FIG. 3 is an exploded perspective view schematically showing a part of one battery module 10. In FIG. 3, the flat plate battery 21, the outer fixing member 22, the first connecting member 23, and the second connecting member 24 are shown in a state of being separated from each other. However, in reality, the flat battery 21 and the first connecting member 23 are arranged so as to be in surface contact with each other via the insulating member 35 described later, and the first and second connecting members 23 and 24 The outer fixing member 22 is arranged so as to be in surface contact with each other via the insulating member 35.

各平板状電池２１は、正極端子２１ａと負極端子２１ｂとを備える。本実施形態では、各平板状電池２１は、正極端子２１ａ及び負極端子２１ｂを同一側面上に備えるように構成される。特に、本実施形態では、図２に示したように、各平板状電池２１は、正極端子２１ａ及び負極端子２１ｂが共に各平板状電池２１の本体の後側に配置されるように構成される。しかしながら、各平板状電池２１は、正極端子２１ａ及び負極端子２１ｂが同一側面上に配置されれば、電池パックケース２内においていかなる向きに配置されてもよい。 Each flat battery 21 includes a positive electrode terminal 21a and a negative electrode terminal 21b. In the present embodiment, each flat-plate battery 21 is configured to have a positive electrode terminal 21a and a negative electrode terminal 21b on the same side surface. In particular, in the present embodiment, as shown in FIG. 2, each flat plate battery 21 is configured such that both the positive electrode terminal 21a and the negative electrode terminal 21b are arranged on the rear side of the main body of each flat plate battery 21. .. However, each flat battery 21 may be arranged in any direction in the battery pack case 2 as long as the positive electrode terminal 21a and the negative electrode terminal 21b are arranged on the same side surface.

また、正極端子２１ａ及び負極端子２１ｂは、平板状電池２１の本体から鉛直方向ではなく、水平方向に配置されることが好ましい。このように、各平板状電池２１の正極端子２１ａ及び負極端子２１ｂが鉛直方向に延びないように配置することにより、電池パック１内に正極端子２１ａ及び負極端子２１ｂ用のスペースを鉛直方向に設ける必要がなくなり、よって電池パック１の全高を低く抑えることができる。 Further, it is preferable that the positive electrode terminal 21a and the negative electrode terminal 21b are arranged not in the vertical direction but in the horizontal direction from the main body of the flat plate battery 21. By arranging the positive electrode terminal 21a and the negative electrode terminal 21b of each flat battery 21 so as not to extend in the vertical direction in this way, a space for the positive electrode terminal 21a and the negative electrode terminal 21b is provided in the battery pack 1 in the vertical direction. This eliminates the need, and thus the overall height of the battery pack 1 can be kept low.

各平板状電池２１は、１つ又は複数の電池素子５０を備える。図４は、各電池素子５０の概略的な断面図である。図４に示したように、各電池素子５０は、正極集電体層５１、正極活物質層５２、固体電解質層５３、負極活物質層５４及び負極集電体層５５がこの順に積層されて形成される。本実施形態では、正極集電体層５１、正極活物質層５２、固体電解質層５３、負極活物質層５４、及び負極集電体層５５は、それぞれ固体材料で形成される。 Each flat battery 21 includes one or more battery elements 50. FIG. 4 is a schematic cross-sectional view of each battery element 50. As shown in FIG. 4, in each battery element 50, the positive electrode current collector layer 51, the positive electrode active material layer 52, the solid electrolyte layer 53, the negative electrode active material layer 54, and the negative electrode current collector layer 55 are laminated in this order. It is formed. In the present embodiment, the positive electrode current collector layer 51, the positive electrode active material layer 52, the solid electrolyte layer 53, the negative electrode active material layer 54, and the negative electrode current collector layer 55 are each formed of a solid material.

正極集電体層５１は、正極集電体を有し、正極活物質層５２からの集電を行う機能を有する。正極集電体の材料としては、例えば、アルミニウム、ＳＵＳ、ニッケル、鉄、チタン等を用いることができる。正極集電体層５１は、電池素子５０から突出して電池素子５０の正極として機能する正電極５１ａを備える。 The positive electrode current collector layer 51 has a positive electrode current collector and has a function of collecting current from the positive electrode active material layer 52. As the material of the positive electrode current collector, for example, aluminum, SUS, nickel, iron, titanium and the like can be used. The positive electrode current collector layer 51 includes a positive electrode 51a that protrudes from the battery element 50 and functions as a positive electrode of the battery element 50.

正極活物質層５２は、正極活物質を含む。電池素子５０がリチウムイオン電池である場合には、正極活物質としては、例えば、コバルト酸リチウムやマンガン酸リチウム等の公知の正極活物質を適宜用いることができる。また、正極活物質層５２は、正極活物質に加えて、更に固体電解質、導電剤、バインダを含有していても良い。 The positive electrode active material layer 52 contains a positive electrode active material. When the battery element 50 is a lithium ion battery, a known positive electrode active material such as lithium cobalt oxide or lithium manganate can be appropriately used as the positive electrode active material. Further, the positive electrode active material layer 52 may further contain a solid electrolyte, a conductive agent, and a binder in addition to the positive electrode active material.

正極活物質層５２に用いることができる固体電解質としては、後述する固体電解質層５３に用いる材料と同様の材料や、酸化物系非晶質固体電解質、結晶質酸化物等を用いることができる。 As the solid electrolyte that can be used for the positive electrode active material layer 52, the same material as the material used for the solid electrolyte layer 53 described later, an oxide-based amorphous solid electrolyte, a crystalline oxide, or the like can be used.

固体電解質層５３は、イオン導電性を示す固体物質である固体電解質を含む。電池素子５０がリチウムイオン電池である場合には、固体電解質としては、例えばＬｉ2Ｓ−Ｐ2Ｓ5やＬｉ7Ｐ3Ｓ11等の硫化物系固体電解質や、ＬｉＩやＬｉ2Ｏ−Ｂ2Ｏ3−Ｐ2Ｏ5等の酸化物系固体電解質等の公知の固体電解質を適宜用いることができる。 The solid electrolyte layer 53 contains a solid electrolyte which is a solid substance exhibiting ionic conductivity. If the battery element 50 is a lithium ion battery, as the solid electrolyte, and for example, Li 2 S-P 2 S 5 and Li 7 P 3 S 11 sulfide-based solid electrolytes such as, LiI and Li 2 O-B A known solid electrolyte such as an oxide-based solid electrolyte such as 2 O 3 −P 2 O 5 can be appropriately used.

負極活物質層５４は、負極活物質を含む。電池素子５０がリチウムイオン電池である場合には、負極活物質としては、例えばグラファイトなどの公知の負極活物質を適宜用いることができる。負極活物質層５４も、負極活物質に加えて、上述したような固体電解質、導電剤、バインダを含有していても良い。 The negative electrode active material layer 54 contains a negative electrode active material. When the battery element 50 is a lithium ion battery, a known negative electrode active material such as graphite can be appropriately used as the negative electrode active material. The negative electrode active material layer 54 may also contain the solid electrolyte, the conductive agent, and the binder as described above in addition to the negative electrode active material.

負極集電体層５５は、負極集電体を有し、負極活物質層５４からの集電を行う機能を有する。負極集電体の材料としては、正極集電体の材料に加え、銅を用いることができる。負極集電体層５５は、電池素子５０から突出して電池素子５０の負極として機能する負電極５５ａを備える。 The negative electrode current collector layer 55 has a negative electrode current collector and has a function of collecting current from the negative electrode active material layer 54. As the material of the negative electrode current collector, copper can be used in addition to the material of the positive electrode current collector. The negative electrode current collector layer 55 includes a negative electrode 55a that protrudes from the battery element 50 and functions as a negative electrode of the battery element 50.

なお、本実施形態では、電池素子５０は、固体電解質層５３を有するように構成されている。しかしながら、電池素子５０は、正極集電体層、正極活物質層、セパレーター、負極活物質層、及び負極集電体層が電解液に含浸されている液系電池等、全固体電池以外の電池であってもよい。 In this embodiment, the battery element 50 is configured to have the solid electrolyte layer 53. However, the battery element 50 is a battery other than an all-solid-state battery, such as a positive electrode current collector layer, a positive electrode active material layer, a separator, a negative electrode active material layer, and a liquid-based battery in which the negative electrode current collector layer is impregnated with an electrolytic solution. May be.

各平板状電池２１は、１つの電池素子５０であってもよい。この場合、電池素子５０の正電極５１ａは平板状電池２１の正極端子２１ａとして機能し、負電極５５ａは平板状電池２１の負極端子２１ｂとして機能する。 Each flat battery 21 may be one battery element 50. In this case, the positive electrode 51a of the battery element 50 functions as the positive electrode terminal 21a of the flat plate battery 21, and the negative electrode 55a functions as the negative electrode terminal 21b of the flat plate battery 21.

或いは、各平板状電池２１は、外装体と外装体に収容された１つ又は複数の電池素子５０とを備えた電池であってもよい。外装体は、金属層とシーラント材層とを有するラミネート外装体であってもよく、この場合、各平板状電池２１は、ラミネート電池として形成される。或いは、外装体は、箱状に形成された箱状部材であってもよく、この場合、各平板状電池２１は、角形電池として形成される。 Alternatively, each flat battery 21 may be a battery including an exterior body and one or more battery elements 50 housed in the exterior body. The exterior body may be a laminated exterior body having a metal layer and a sealant material layer, and in this case, each flat plate battery 21 is formed as a laminated battery. Alternatively, the exterior body may be a box-shaped member formed in a box shape, and in this case, each flat plate-shaped battery 21 is formed as a square battery.

各平板状電池２１が外装体内に１つの電池素子５０を備える場合には、電池素子５０の正電極５１ａは平板状電池２１の正極端子２１ａに接続され、負電極５５ａは平板状電池２１の負極端子２１ｂに接続される。各平板状電池２１が外装体内に複数の電池素子５０を備える場合には、これら電池素子５０同士は直列又は並列に接続され、これら電池素子５０のうちの少なくとも一部の電池素子５０の正電極５１ａは平板状電池２１の正極端子２１ａに接続され、これら電池素子５０のうちの少なくとも一部の電池素子５０の負電極５５ａは平板状電池２１の負極端子２１ｂに接続される。 When each flat plate battery 21 includes one battery element 50 inside the exterior, the positive electrode 51a of the battery element 50 is connected to the positive electrode terminal 21a of the flat plate battery 21, and the negative electrode 55a is the negative electrode of the flat plate battery 21. It is connected to the terminal 21b. When each flat battery 21 has a plurality of battery elements 50 inside the exterior, the battery elements 50 are connected in series or in parallel, and the positive electrodes of at least some of the battery elements 50 are positive electrodes. 51a is connected to the positive electrode terminal 21a of the flat plate battery 21, and the negative electrode 55a of at least a part of the battery elements 50 is connected to the negative electrode terminal 21b of the flat plate battery 21.

上述したように、各電池モジュール１０は、積層された複数の平板状電池２１を備える。図２からわかるように、複数の平板状電池２１は、平板状電池２１の広い側面同士が向き合うように、水平方向に配置される。また、本実施形態では、各電池モジュール１０は、その電池モジュール１０を構成する全ての平板状電池２１の正極端子２１ａ及び負極端子２１ｂが電池モジュール１０の同一側面上に配置されるように構成される。 As described above, each battery module 10 includes a plurality of stacked flat plate batteries 21. As can be seen from FIG. 2, the plurality of flat plate-shaped batteries 21 are arranged in the horizontal direction so that the wide side surfaces of the flat plate-shaped batteries 21 face each other. Further, in the present embodiment, each battery module 10 is configured such that the positive electrode terminals 21a and the negative electrode terminals 21b of all the flat plate batteries 21 constituting the battery module 10 are arranged on the same side surface of the battery module 10. The module.

各電池モジュール１０を構成する平板状電池２１同士は、直列又は並列に接続される（図示せず）。隣り合う平板状電池２１同士が直列に接続される場合には、隣り合う平板状電池２１の正極端子２１ａ及び負極端子２１ｂが接続されることになる。一方、隣り合う平板状電池２１同士が並列に接続される場合には、隣り合う平板状電池２１の正極端子２１ａ同士又は負極端子２１ｂ同士が接続されることになる。 The flat batteries 21 constituting each battery module 10 are connected in series or in parallel (not shown). When the adjacent flat-plate batteries 21 are connected in series, the positive electrode terminal 21a and the negative electrode terminal 21b of the adjacent flat-plate batteries 21 are connected. On the other hand, when the adjacent flat-plate batteries 21 are connected in parallel, the positive electrode terminals 21a or the negative electrode terminals 21b of the adjacent flat-plate batteries 21 are connected to each other.

外側固定部材２２は、上述したように、平板状電池２１の積層方向において複数の平板状電池２１の両側に配置される。したがって、本実施形態では、各電池モジュール１０を構成する全ての平板状電池２１の右側に１つの外側固定部材２２が配置され、左側に１つの外側固定部材２２が配置される。各電池モジュール１０を構成する２つの外側固定部材２２のうち少なくとも一方は、ボルト等によって電池パックケース２に固定される。 As described above, the outer fixing member 22 is arranged on both sides of the plurality of flat plate batteries 21 in the stacking direction of the flat plate batteries 21. Therefore, in the present embodiment, one outer fixing member 22 is arranged on the right side of all the flat plate batteries 21 constituting each battery module 10, and one outer fixing member 22 is arranged on the left side. At least one of the two outer fixing members 22 constituting each battery module 10 is fixed to the battery pack case 2 by bolts or the like.

また、本実施形態では、各電池モジュール１０を構成する外側固定部材２２同士は、例えば両外側固定部材２２間で延びるシャフト等（図示せず）によって互いに連結される。特に、本実施形態では、外側固定部材２２同士は、これら外側固定部材２２間に配置された平板状電池２１の積層方向において、これら複数の平板状電池２１に大きい荷重を加えるように連結される。これにより、全固定電池である平板状電池２１の各電池素子５０の積層方向に拘束力を加えることができる。 Further, in the present embodiment, the outer fixing members 22 constituting each battery module 10 are connected to each other by, for example, a shaft extending between the two outer fixing members 22 (not shown). In particular, in the present embodiment, the outer fixing members 22 are connected to each other so as to apply a large load to the plurality of flat plate-shaped batteries 21 in the stacking direction of the flat plate-shaped batteries 21 arranged between the outer fixing members 22. .. As a result, a binding force can be applied in the stacking direction of each battery element 50 of the flat battery 21 which is a fully fixed battery.

≪接続部材の構成≫
図５は、第１の接続部材２３を概略的に示す斜視図である。図５に示したように、第１の接続部材２３は、平板状の接続部材本体３１と、接続部材本体３１の相対する側面に設けられた第１及び第２の接続端子３２及び３３と、を備える。本実施形態では、接続部材本体３１、第１及び第２の接続端子３２及び３３は、金属等の導電性の材料で一体的に形成される。ここで、第２の接続部材２４も、第１の接続部材２３と同様の構成を有しており、板状の接続部材本体３１と、接続部材本体３１の相対する側面に設けられた第１及び第２の接続端子３２及び３３と、を備える。 ≪Structure of connecting member≫
FIG. 5 is a perspective view schematically showing the first connecting member 23. As shown in FIG. 5, the first connecting member 23 includes a flat plate-shaped connecting member main body 31 and first and second connecting terminals 32 and 33 provided on opposite side surfaces of the connecting member main body 31. To prepare for. In the present embodiment, the connecting member main body 31, the first and second connecting terminals 32 and 33 are integrally formed of a conductive material such as metal. Here, the second connecting member 24 also has the same configuration as the first connecting member 23, and is provided on the opposite side surface of the plate-shaped connecting member main body 31 and the connecting member main body 31. And second connection terminals 32 and 33.

また、図５に示したように、接続部材本体３１において第１及び第２の接続端子３２及び３３が設けられていない広い側面上には、絶縁性部材３５が設けられる。逆に言うと、接続部材本体３１の絶縁性部材３５が設けられていない２つの相対する側面に第１及び第２の接続端子３２及び３３が設けられる。絶縁性部材３５は、絶縁性を有していれば、例えば樹脂等いかなる材料で形成されてもよく、例えば、接続部材本体３１の側面上に設けられた樹脂ラミネートとして形成される。 Further, as shown in FIG. 5, the insulating member 35 is provided on the wide side surface of the connecting member main body 31 where the first and second connecting terminals 32 and 33 are not provided. To put it the other way around, the first and second connection terminals 32 and 33 are provided on the two opposite side surfaces of the connection member main body 31 where the insulating member 35 is not provided. The insulating member 35 may be made of any material such as resin as long as it has insulating properties, and is formed as a resin laminate provided on the side surface of the connecting member main body 31, for example.

図５に示したように、本実施形態では、絶縁性部材３５は、接続部材本体３１の広い側面の全面に亘って配置される。しかしながら、絶縁性部材３５は、必ずしも接続部材本体３１の広い側面の全面を覆うように配置されていなくてもよく、その一部を覆うように配置されてもよい。ただし、この場合には、絶縁性部材３５は、接続部材本体３１と隣接して配置される平板状電池２１と接続部材本体３１とが直接接触することの無いように、且つ接続部材本体３１と隣接して配置される外側固定部材２２と接続部材本体３１とが直接接触することの無いように、接続部材本体３１の側面上に配置される。 As shown in FIG. 5, in the present embodiment, the insulating member 35 is arranged over the entire wide side surface of the connecting member main body 31. However, the insulating member 35 does not necessarily have to be arranged so as to cover the entire wide side surface of the connecting member main body 31, and may be arranged so as to cover a part thereof. However, in this case, the insulating member 35 is provided so that the flat plate-shaped battery 21 arranged adjacent to the connecting member main body 31 and the connecting member main body 31 do not come into direct contact with each other and the connecting member main body 31. It is arranged on the side surface of the connecting member main body 31 so that the outer fixing member 22 arranged adjacent to the outer fixing member 22 and the connecting member main body 31 do not come into direct contact with each other.

図２に示したように、第１及び第２の接続部材２３及び２４は、平板状電池２１と並列に配置される。したがって、第１及び第２の接続部材２３及び２４の広い側面が平板状電池２１の側面と対向するようにそれぞれ配置される。 As shown in FIG. 2, the first and second connecting members 23 and 24 are arranged in parallel with the flat battery 21. Therefore, the wide side surfaces of the first and second connecting members 23 and 24 are arranged so as to face the side surfaces of the flat plate battery 21, respectively.

各電池モジュール１０における第１の接続部材２３は、平板状電池２１と外側固定部材２２との間に配置される。本実施形態では、第１及び第３の電池モジュール１０ａ及び１０ｃにおける第１の接続部材２３は平板状電池２１と右側の外側固定部材２２との間に配置され、第２及び第４の電池モジュール１０ｂ及び１０ｄにおける第１の接続部材２３は平板状電池２１と左側の外側固定部材２２との間に配置されている。また、各電池モジュール１０における第２の接続部材２４は、２つの外側固定部材２２のうち、一方の外側固定部材２２よりも外側にそれぞれ配置される。本実施形態では、第１乃至第４の電池モジュール１０ａ乃至１０ｄの各々における第２の接続部材２４は、右側の外側固定部材２２よりも右側にそれぞれ配置されている。なお、本実施形態における第１及び第２の接続部材２３及び２４の配置はあくまで例示を目的とするものであり、本発明の原理を逸脱しない範囲で第１及び第２の接続部材２３及び２４を如何なる位置に配置してもよい。 The first connecting member 23 in each battery module 10 is arranged between the flat plate battery 21 and the outer fixing member 22. In the present embodiment, the first connecting member 23 in the first and third battery modules 10a and 10c is arranged between the flat plate battery 21 and the outer fixing member 22 on the right side, and the second and fourth battery modules are arranged. The first connecting member 23 in 10b and 10d is arranged between the flat plate battery 21 and the outer fixing member 22 on the left side. Further, the second connecting member 24 in each battery module 10 is arranged outside the outer fixing member 22 of the two outer fixing members 22 respectively. In the present embodiment, the second connecting member 24 in each of the first to fourth battery modules 10a to 10d is arranged on the right side of the outer fixing member 22 on the right side. The arrangement of the first and second connecting members 23 and 24 in the present embodiment is for the purpose of illustration only, and the first and second connecting members 23 and 24 are not deviated from the principle of the present invention. May be placed in any position.

≪電池パックの構成≫
次に、図２を再び参照して、電池パック１内における電池モジュール１０等の配置や構成について説明する。上述したように、電池パックケース２内には、同一平面上において複数の平板状電池２１の積層方向に直交する前後方向に並んで配列された複数の電池モジュール１０が収容されている。図２に示した例では、電池パックケース２内には、第１の電池モジュール１０ａから第４の電池モジュール１０ｄまでの４つの電池モジュール１０が収容されている。 ≪Battery pack configuration≫
Next, with reference to FIG. 2 again, the arrangement and configuration of the battery module 10 and the like in the battery pack 1 will be described. As described above, the battery pack case 2 houses a plurality of battery modules 10 arranged side by side in the front-rear direction orthogonal to the stacking direction of the plurality of flat plate-shaped batteries 21 on the same plane. In the example shown in FIG. 2, four battery modules 10 from the first battery module 10a to the fourth battery module 10d are housed in the battery pack case 2.

電池パックケース２内に収容された電池モジュール１０は、各電池モジュール１０を構成する平板状電池２１の積層方向が同一の方向となるように配置される。図２に示した例では、電池パックケース２内において、平板状電池２１の積層方向が左右方向となるように各電池モジュール１０が配置される。特に、図示した実施形態では、各電池モジュール１０を構成する平板状電池２１の正極端子２１ａ及び負極端子２１ｂは、各電池モジュール１０の後側に配置される。 The battery modules 10 housed in the battery pack case 2 are arranged so that the stacking directions of the flat battery 21 constituting each battery module 10 are the same. In the example shown in FIG. 2, the battery modules 10 are arranged in the battery pack case 2 so that the stacking direction of the flat battery 21 is the left-right direction. In particular, in the illustrated embodiment, the positive electrode terminal 21a and the negative electrode terminal 21b of the flat plate battery 21 constituting each battery module 10 are arranged on the rear side of each battery module 10.

各電池モジュール１０を構成する第１の接続部材２３は、その第１の接続端子３２が各電池モジュール１０の後側に配置されると共に、第２の接続端子３３が各電池モジュール１０の前側に配置される。この結果、第１の接続端子３２は、電池モジュール１０に対して、平板状電池２１の端子２１ａ、２１ｂが設けられた側面と同じ側に配置される。 The first connection member 23 constituting each battery module 10 has a first connection terminal 32 arranged on the rear side of each battery module 10 and a second connection terminal 33 on the front side of each battery module 10. Be placed. As a result, the first connection terminal 32 is arranged on the same side as the side surface of the flat plate battery 21 where the terminals 21a and 21b are provided with respect to the battery module 10.

第１の接続部材２３の第２の接続端子３３は、電池モジュール１０に対して平板状電池２１の端子２１ａ、２１ｂが設けられた側面とは反対側に配置される。この結果、隣り合う電池モジュール１０のうち一方の電池モジュール１０の第１の接続部材２３の第２の接続端子３３と、他方の電池モジュール１０の平板状電池２１の端子２１ａ、２１ｂとが対向する。 The second connection terminal 33 of the first connection member 23 is arranged on the side opposite to the side surface where the terminals 21a and 21b of the flat battery 21 are provided with respect to the battery module 10. As a result, the second connection terminal 33 of the first connection member 23 of one of the adjacent battery modules 10 and the terminals 21a and 21b of the flat battery 21 of the other battery module 10 face each other. ..

各電池モジュール１０の第１の接続部材２３の第１の接続端子３２は、その電池モジュール１０の平板状電池２１の正極端子２１ａ又は負極端子２１ｂに接続されている。一方、各電池モジュール１０の第１の接続部材２３の第２の接続端子３３は、第１及び第２の電池端子４及び５の最も近い前側の端に配置された最前列の電池モジュール１０を除き、隣接する電池モジュール１０の平板状電池２１の端子２１ａ、２１ｂに導電性の連結部材２６によって接続されている。最前列の電池モジュール１０の第１の接続部材２３の他方の接続端子３３は、第１の電池端子４に接続されている。 The first connection terminal 32 of the first connection member 23 of each battery module 10 is connected to the positive electrode terminal 21a or the negative electrode terminal 21b of the flat plate battery 21 of the battery module 10. On the other hand, the second connection terminal 33 of the first connection member 23 of each battery module 10 is a front row battery module 10 arranged at the nearest front end of the first and second battery terminals 4 and 5. Except, the terminals 21a and 21b of the flat battery 21 of the adjacent battery module 10 are connected to the terminals 21a and 21b by the conductive connecting member 26. The other connection terminal 33 of the first connection member 23 of the battery module 10 in the front row is connected to the first battery terminal 4.

図２に示す例では、第２の電池モジュール１０ｂの第１の接続部材２３の第１の接続端子３２は第２の電池モジュール１０ｂの平板状電池２１の端子２１ａ、２１ｂに接続され、第２の接続端子３３は第１の電池モジュール１０ａの平板状電池２１の端子２１ａ、２１ｂに接続されている。同様に、第３の電池モジュール１０ｃの第１の接続部材２３の第１の接続端子３２は第３の電池モジュール１０ｃの平板状電池２１の端子２１ａ、２１ｂに接続され、第２の接続端子３３は第２の電池モジュール１０ｂの平板状電池２１の端子２１ａ、２１ｂに接続されている。一方で、最前列の第１の電池モジュール１０ａの第１の接続部材２３の第２の接続端子３３は、第１の電池端子４に接続されている。 In the example shown in FIG. 2, the first connection terminal 32 of the first connection member 23 of the second battery module 10b is connected to the terminals 21a and 21b of the flat battery 21 of the second battery module 10b, and is second. Connection terminal 33 is connected to terminals 21a and 21b of the flat battery 21 of the first battery module 10a. Similarly, the first connection terminal 32 of the first connection member 23 of the third battery module 10c is connected to the terminals 21a and 21b of the flat battery 21 of the third battery module 10c, and the second connection terminal 33 Is connected to the terminals 21a and 21b of the flat battery 21 of the second battery module 10b. On the other hand, the second connection terminal 33 of the first connection member 23 of the first battery module 10a in the front row is connected to the first battery terminal 4.

各電池モジュール１０を構成する第２の接続部材２４は、その第１の接続端子３２が各電池モジュール１０の後側に配置されると共に、第２の接続端子３３が各電池モジュール１０の前側に配置される。この結果、第２の接続部材２４の第１の接続端子３２は、電池モジュール１０に対して、平板状電池２１の端子２１ａ、２１ｂが設けられた側面と同じ側に配置される。 The second connection member 24 constituting each battery module 10 has a first connection terminal 32 arranged on the rear side of each battery module 10 and a second connection terminal 33 on the front side of each battery module 10. Be placed. As a result, the first connection terminal 32 of the second connection member 24 is arranged on the same side as the side surface of the flat plate battery 21 where the terminals 21a and 21b are provided with respect to the battery module 10.

第２の接続部材２４の第２の接続端子３３は、電池モジュール１０に対して平板状電池２１の端子２１ａ、２１ｂが設けられた側面とは反対側に配置される。この結果、隣り合う電池モジュール１０のうち、一方の電池モジュール１０の第２の接続部材２４の第１の接続端子３２と、他方の電池モジュール１０の第２の接続部材２４の第２の接続端子３３とが対向する。 The second connection terminal 33 of the second connection member 24 is arranged on the side opposite to the side surface where the terminals 21a and 21b of the flat battery 21 are provided with respect to the battery module 10. As a result, among the adjacent battery modules 10, the first connection terminal 32 of the second connection member 24 of one battery module 10 and the second connection terminal of the second connection member 24 of the other battery module 10 33 faces each other.

前後方向に配列された複数の電池モジュール１０のうち、第１及び第２の電池端子４及び５が配置された位置から最も離れた後側の端に配置された最後列の電池モジュール１０の第２の接続部材２４の第１の接続端子３２は、その電池モジュール１０の平板状電池２１の正極端子２１ａ又は負極端子２１ｂに連結部材２６によって接続されている。また、隣り合う電池モジュール１０の第２の接続部材２４同士は、一方の電池モジュール１０の第２の接続部材２４の第１の接続端子３２と、他方の電池モジュール１０の第２の接続部材２４の第２の接続端子３３とが連結部材２６によって互いに接続されている。さらに、最前列の電池モジュール１０の第２の接続部材２４の第２の接続端子３３は、第２の電池端子５に接続されている。 Of the plurality of battery modules 10 arranged in the front-rear direction, the first row of battery modules 10 arranged at the rearmost end farthest from the positions where the first and second battery terminals 4 and 5 are arranged. The first connection terminal 32 of the connection member 24 of 2 is connected to the positive electrode terminal 21a or the negative electrode terminal 21b of the flat plate battery 21 of the battery module 10 by the connection member 26. Further, the second connecting members 24 of the adjacent battery modules 10 are connected to the first connecting terminal 32 of the second connecting member 24 of one battery module 10 and the second connecting member 24 of the other battery module 10. The second connection terminal 33 of the above is connected to each other by a connecting member 26. Further, the second connection terminal 33 of the second connection member 24 of the battery module 10 in the front row is connected to the second battery terminal 5.

図２に示す例では、最後列の第４の電池モジュール１０ｄの第２の接続部材２４の第１の接続端子３２は、第４の電池モジュール１０ｄの平板状電池２１の正極端子２１ａ又は負極端子２１ｂに連結部材２６によって接続されている。また、第２の電池モジュール１０ｂの第２の接続部材２４の第１の接続端子３２は第３の電池モジュール１０ｃの第２の接続部材２４の第２の接続端子３３に接続され、第３の電池モジュール１０ｃの第２の接続部材２４の第１の接続端子３２は第４の電池モジュール１０ｄの第２の接続部材２４の第２の接続端子３３に接続されている。さらに、最前列の第１の電池モジュール１０ａの第２の接続部材２４の第２の接続端子３３は、第２の電池端子５に接続されている。 In the example shown in FIG. 2, the first connection terminal 32 of the second connection member 24 of the fourth battery module 10d in the last row is the positive electrode terminal 21a or the negative electrode terminal of the flat plate battery 21 of the fourth battery module 10d. It is connected to 21b by a connecting member 26. Further, the first connection terminal 32 of the second connection member 24 of the second battery module 10b is connected to the second connection terminal 33 of the second connection member 24 of the third battery module 10c, and the third connection terminal 33 is connected. The first connection terminal 32 of the second connection member 24 of the battery module 10c is connected to the second connection terminal 33 of the second connection member 24 of the fourth battery module 10d. Further, the second connection terminal 33 of the second connection member 24 of the first battery module 10a in the front row is connected to the second battery terminal 5.

図６は、電池パックカバー３を取り外した状態における、本発明の第１の実施形態に係る電池パック１の電流経路を示す平面図である。図６に示すように、本発明の第１の実施形態に係る電池パック１では、正極である第１の電池端子４は第１の電池モジュール１０ａの第１の接続部材２３の第２の接続端子３３に接続され、第１の電池モジュール１０ａの左端の平板状電池２１は第２の電池モジュール１０ｂの第１の接続部材２３の第２の接続端子３３に接続されている。そのため、第１の電池端子４から第１の電池モジュール１０ａの第１の接続部材２３、第１の電池モジュール１０ａの第１の接続部材２３から第１の電池モジュール１０ａの左端の平板状電池２１、第１の電池モジュール１０ａの左端の平板状電池２１から第２の電池モジュール１０ｂの第１の接続部材２３、の経路で電流が流れる。以降、同様にして、第２の電池モジュール１０ｂから第３の電池モジュール１０ｃ、第３の電池モジュール１０ｃから第４の電池モジュール１０ｄへ電流が流れる。 FIG. 6 is a plan view showing a current path of the battery pack 1 according to the first embodiment of the present invention in a state where the battery pack cover 3 is removed. As shown in FIG. 6, in the battery pack 1 according to the first embodiment of the present invention, the first battery terminal 4 which is a positive electrode is the second connection of the first connection member 23 of the first battery module 10a. The flat battery 21 at the left end of the first battery module 10a is connected to the terminal 33, and is connected to the second connection terminal 33 of the first connection member 23 of the second battery module 10b. Therefore, the flat battery 21 at the left end of the first connection member 23 of the first battery module 10a from the first battery terminal 4 and the first connection member 23 of the first battery module 10a to the first battery module 10a. , A current flows through the path from the flat plate battery 21 at the left end of the first battery module 10a to the first connecting member 23 of the second battery module 10b. Hereinafter, in the same manner, current flows from the second battery module 10b to the third battery module 10c, and from the third battery module 10c to the fourth battery module 10d.

第４の電池モジュール１０ｄでは、第１の接続部材２３から複数の平板状電池２１にわたって電流が流れる。第４の電池モジュール１０ｄでは、右端の平板状電池２１は連結部材２６を介して第２の接続部材２４の第１の接続端子３２に接続されているため、右端の平板状電池２１から連結部材２６を介して第２の接続部材２４へ電流が流れる。 In the fourth battery module 10d, a current flows from the first connecting member 23 through the plurality of flat plate batteries 21. In the fourth battery module 10d, since the flat plate-shaped battery 21 at the right end is connected to the first connection terminal 32 of the second connecting member 24 via the connecting member 26, the flat plate-shaped battery 21 at the right end is connected to the connecting member. A current flows through the 26 to the second connecting member 24.

第４の電池モジュール１０ｄの第２の接続部材２４の第２の接続端子３３は連結部材２６を介して第３の電池モジュール１０ｃの第２の接続部材２４の第１の接続端子３２に接続されているため、第４の電池モジュール１０ｄの第２の接続部材２４から第３の電池モジュール１０ｃの第２の接続部材２４へ電流が流れる。以降、同様にして、第３の電池モジュール１０ｃから第２の電池モジュール１０ｂ、第２の電池モジュール１０ｂから第１の電池モジュール１０ａへ電流が流れる。 The second connection terminal 33 of the second connection member 24 of the fourth battery module 10d is connected to the first connection terminal 32 of the second connection member 24 of the third battery module 10c via the connection member 26. Therefore, a current flows from the second connecting member 24 of the fourth battery module 10d to the second connecting member 24 of the third battery module 10c. Hereinafter, in the same manner, current flows from the third battery module 10c to the second battery module 10b, and from the second battery module 10b to the first battery module 10a.

第１の電池モジュール１０ａの第２の接続部材２４の第２の接続端子３３は、第２の電池端子５に接続されているため、第１の電池モジュール１０ａの第２の接続部材２４から第２の電池端子５へ電流が流れる。 Since the second connection terminal 33 of the second connection member 24 of the first battery module 10a is connected to the second battery terminal 5, the second connection member 24 to the second connection member 24 of the first battery module 10a is connected. Current flows to the battery terminal 5 of 2.

このように、本実施形態によれば、隣り合う電池モジュール１０の端子同士を接続するのに、各電池モジュール１０内に設けられた板状の第１及び第２の接続部材２３及び２４を用いる。このため、電池モジュール１０の外部に電池モジュール１０を横切るように延びるワイヤーハーネス等を設ける必要がない。電池モジュール１０の外部にワイヤーハーネスを設けると、大きな電流の流れるワイヤーハーネスを太くする必要があり、車両の振動等によってワイヤーハーネスに摩耗が発生して短絡等が発生しないようにするためには、電池モジュールの外部にワイヤーハーネスを収容するための十分な空間が必要になる。これに対して、本実施形態によれば、電池モジュール１０の外部に大きな空間を設ける必要がなくなり、よって電池パック１の体積エネルギ密度を高めることができる。 As described above, according to the present embodiment, the plate-shaped first and second connecting members 23 and 24 provided in each battery module 10 are used to connect the terminals of the adjacent battery modules 10 to each other. .. Therefore, it is not necessary to provide a wire harness or the like extending across the battery module 10 outside the battery module 10. If a wire harness is provided outside the battery module 10, it is necessary to make the wire harness through which a large current flows thicker, and in order to prevent the wire harness from being worn and short-circuited due to vehicle vibration or the like. Sufficient space is required to accommodate the wire harness outside the battery module. On the other hand, according to the present embodiment, it is not necessary to provide a large space outside the battery module 10, and therefore the volume energy density of the battery pack 1 can be increased.

また、電池モジュール１０の外部にワイヤーハーネスを設けると、例えば、車両の衝突等によって電池パック１が変形したときにワイヤーハーネスが本来接触すべきでない箇所に接触してしまい、短絡等が発生する可能性がある。これに対して、本実施形態によれば、第１の接続部材２３は電池パックケース２に固定された外側固定部材２２間に配置されるため、電池パック１が変形するような場合でも短絡等が発生しにくい。したがって、電池パック１の安全性を高めることができる。 Further, if the wire harness is provided outside the battery module 10, for example, when the battery pack 1 is deformed due to a collision of a vehicle or the like, the wire harness may come into contact with a place where it should not be in contact, resulting in a short circuit or the like. There is sex. On the other hand, according to the present embodiment, since the first connecting member 23 is arranged between the outer fixing members 22 fixed to the battery pack case 2, even if the battery pack 1 is deformed, a short circuit or the like occurs. Is unlikely to occur. Therefore, the safety of the battery pack 1 can be enhanced.

さらに、本実施形態によれば、第１及び第２の電池端子４及び５が配置された位置から最も離れた位置に配置された電池モジュール１０の第２の接続部材２４はその電池モジュール１０の平板状電池２１に接続され、隣り合う電池モジュール１０の第２の接続部材２４同士は互いに接続されている。そのため、第１の接続部材２３と第２の接続部材２４とで、それらの接続端子３２は極性が互いに逆になり、それらの接続端子３３は極性が互いに逆になる。これにより、図６で示したように、第１の電池端子４から第４の電池モジュール１０ｄへの方向に向かう電流は、第４の電池モジュール１０ｄにおいて連結部材２６及び第２の接続部材２４によってその方向が折り返されて、第４の電池モジュール１０ｄから第２の電池端子５に向かうようになる。したがって、第１の接続部材２３を流れる電流の方向と第２の接続部材２４を流れる電流の方向とが反対方向になるため、電池パック１の総正極端子及び総負極端子である第１及び第２の電池端子４及び５を同じ側に配置させることが可能となる。 Further, according to the present embodiment, the second connecting member 24 of the battery module 10 arranged at the position farthest from the position where the first and second battery terminals 4 and 5 are arranged is the battery module 10. The second connecting members 24 of the adjacent battery modules 10 are connected to each other by being connected to the flat battery 21. Therefore, in the first connecting member 23 and the second connecting member 24, the polarities of the connection terminals 32 are opposite to each other, and the polarities of the connection terminals 33 are opposite to each other. As a result, as shown in FIG. 6, the current directed from the first battery terminal 4 to the fourth battery module 10d is transmitted by the connecting member 26 and the second connecting member 24 in the fourth battery module 10d. The direction is folded back toward the second battery terminal 5 from the fourth battery module 10d. Therefore, since the direction of the current flowing through the first connecting member 23 and the direction of the current flowing through the second connecting member 24 are opposite to each other, the first and first total positive electrode terminals and total negative electrode terminals of the battery pack 1 are used. It is possible to arrange the battery terminals 4 and 5 of 2 on the same side.

ここで、電池パックに接続されるモーターなどの機器は、前輪側や後輪側に配置される。そのため、仮に、電池パックの総正極端子及び総負極端子が互いに電池パックの反対側に配置されると、例えば後側に配置された電池端子を前輪側に配置されたモーターに接続する際に、その接続のための配線を電池パック内で後側から前側に引き回す分だけ電池モジュールの外部に無駄な配線が必要になる。斯かるモーターに接続するような配線は大電流が流れるため比較的太いことから、電池モジュールの外部に当該配線を収容するための十分な空間が必要になる。これに対して、本実施形態によれば、第１及び第２の電池端子４及び５が同じ側に配置されているため、無駄な配線が必要なく、電池モジュール１０の外部に大きな空間を設ける必要がなくなり、よって電池パック１の体積エネルギ密度を高めることができる。 Here, devices such as motors connected to the battery pack are arranged on the front wheel side and the rear wheel side. Therefore, if the total positive electrode terminal and the total negative electrode terminal of the battery pack are arranged on opposite sides of the battery pack, for example, when connecting the battery terminal arranged on the rear side to the motor arranged on the front wheel side, Wasteful wiring is required outside the battery module as much as the wiring for the connection is routed from the rear side to the front side in the battery pack. Since the wiring connected to such a motor is relatively thick because a large current flows, sufficient space is required to accommodate the wiring outside the battery module. On the other hand, according to the present embodiment, since the first and second battery terminals 4 and 5 are arranged on the same side, wasteful wiring is not required and a large space is provided outside the battery module 10. This eliminates the need, and thus the volumetric energy density of the battery pack 1 can be increased.

≪変形例≫
ところで、上述した実施形態では、第１及び第２の接続部材２３及び２４の接続部材本体３１は平板状に形成されている。しかしながら、第１及び第２の接続部材２３及び２４は、板状に形成されていれば、必ずしも平板状に形成されていなくてもよい。したがって、例えば、第１及び第２の接続部材２３及び２４は、波板状に形成されてもよい。例えば、第１の接続部材２３が波板状に形成されている場合、第１の接続部材２３と第１の接続部材２３の隣に配置された平板状電池２１との間には流体の通り道が形成されることになり、平板状電池２１を冷却し易くすることができる。 ≪Variation example≫
By the way, in the above-described embodiment, the connecting member main body 31 of the first and second connecting members 23 and 24 is formed in a flat plate shape. However, the first and second connecting members 23 and 24 do not necessarily have to be formed in a flat plate shape as long as they are formed in a plate shape. Therefore, for example, the first and second connecting members 23 and 24 may be formed in a corrugated shape. For example, when the first connecting member 23 is formed in a corrugated shape, a fluid passage is provided between the first connecting member 23 and the flat plate-shaped battery 21 arranged next to the first connecting member 23. Will be formed, and the flat battery 21 can be easily cooled.

また、上述した実施形態では、第１及び第２の接続部材２３及び２４は金属等の導電性の材料で形成される。しかしながら、第１及び第２の接続部材２３及び２４は、必ずしもその全体が導電性の材料で形成されていなくてもよい。したがって、第１及び第２の接続部材２３及び２４の一部のみが導電性の材料で形成されると共に、この導電性の材料によって両接続端子３２、３３が互いに接続されるように構成されてもよい。或いは、第１及び第２の接続部材２３及び２４は、正極端子と負極端子とが二つの相対する側面に設けられた平板状電池として構成されてもよい。 Further, in the above-described embodiment, the first and second connecting members 23 and 24 are formed of a conductive material such as metal. However, the first and second connecting members 23 and 24 do not necessarily have to be entirely made of a conductive material. Therefore, only a part of the first and second connecting members 23 and 24 is formed of the conductive material, and both connecting terminals 32 and 33 are connected to each other by the conductive material. May be good. Alternatively, the first and second connecting members 23 and 24 may be configured as a flat-plate battery in which the positive electrode terminal and the negative electrode terminal are provided on two opposite side surfaces.

加えて、上記実施形態では、各平板状電池２１は、正極端子２１ａと負極端子２１ｂとを同一側面上に備えるように構成されている。しかしながら、各平板状電池２１は、正極端子２１ａと負極端子２１ｂとを異なる側面上に、例えば互いに反対側の側面上に備えるように構成されてもよい。 In addition, in the above embodiment, each flat-plate battery 21 is configured to have a positive electrode terminal 21a and a negative electrode terminal 21b on the same side surface. However, each flat-plate battery 21 may be configured to have the positive electrode terminal 21a and the negative electrode terminal 21b on different side surfaces, for example, on the side surfaces opposite to each other.

加えて、上記実施形態では、第１及び第２の接続部材２３及び２４の側面上に絶縁性部材３５が設けられる。しかしながら、第１及び第２の接続部材２３及び２４の側面上に絶縁性の部材が設けられれば、必ずしも第１及び第２の接続部材２３及び２４と外側固定部材２２との間や第１の接続部材２３と平板状電池２１との間に絶縁性部材３５を設ける必要はない。具体的な態様としては、例えば、外側固定部材２２を絶縁性の材料で形成することや、外装体を備える平板状電池２１の外装体を絶縁性の材料で形成することが考えられる。 In addition, in the above embodiment, the insulating member 35 is provided on the side surfaces of the first and second connecting members 23 and 24. However, if the insulating member is provided on the side surface of the first and second connecting members 23 and 24, it is not necessarily between the first and second connecting members 23 and 24 and the outer fixing member 22 or the first. It is not necessary to provide the insulating member 35 between the connecting member 23 and the flat battery 21. As a specific embodiment, for example, it is conceivable to form the outer fixing member 22 with an insulating material, or to form the exterior body of the flat plate battery 21 provided with the exterior body with an insulating material.

さらに、上記実施形態では、第２の接続部材２４を２つの外側固定部材２２の外側に配置したが、第２の接続部材２４を２つの外側固定部材２２の間に配置してもよい。 Further, in the above embodiment, the second connecting member 24 is arranged outside the two outer fixing members 22, but the second connecting member 24 may be arranged between the two outer fixing members 22.

＜第２の実施形態＞
次に、本発明の第２の実施形態に係る電池パックについて説明する。第２の実施形態に係る電池パックの構成は基本的に第１の実施形態に係る電池パックの構成と同様であるため、以下では、第１の実施形態に係る電池パックの構成と異なる部分を中心に説明する。 <Second embodiment>
Next, the battery pack according to the second embodiment of the present invention will be described. Since the configuration of the battery pack according to the second embodiment is basically the same as the configuration of the battery pack according to the first embodiment, the parts different from the configuration of the battery pack according to the first embodiment are described below. I will explain mainly.

図７は、本発明の第２の実施形態に係る電池パック１０１を概略的に示す斜視図である。電池パック１０１は、電池パックケース１０２と、電池パックケース２の開口部を閉鎖する電池パックカバー１０３と、を有する。電池パックカバー１０３には、４つの開口部が形成される。電池パックカバー１０３の４つの開口部を通って電池パック１０１内の複数の電池モジュール１０’の充放電を行うための第１乃至第４の電池端子４乃至７が電池パック１０１の外部に延びる。第１の電池端子４は第２の電池端子５とは極性が異なり、第３の電池端子６は第４の電池端子７とは極性が異なる。なお、図示した実施形態では、第１乃至第４の電池端子４乃至７は、電池パックカバー１０３を通って電池パック１０１の内部から外部に延びるように形成されているが、電池パックケース１０２を通って電池パック１０１の内部から外部に延びるように形成されてもよい。また、第１乃至第４の電池端子４乃至７は、電池パックケース１０２や電池パックカバー１０３に直接取り付けられてもよい。 FIG. 7 is a perspective view schematically showing the battery pack 101 according to the second embodiment of the present invention. The battery pack 101 has a battery pack case 102 and a battery pack cover 103 that closes the opening of the battery pack case 2. The battery pack cover 103 is formed with four openings. The first to fourth battery terminals 4 to 7 for charging and discharging the plurality of battery modules 10'in the battery pack 101 extend to the outside of the battery pack 101 through the four openings of the battery pack cover 103. The first battery terminal 4 has a different polarity from the second battery terminal 5, and the third battery terminal 6 has a different polarity from the fourth battery terminal 7. In the illustrated embodiment, the first to fourth battery terminals 4 to 7 are formed so as to extend from the inside of the battery pack 101 to the outside through the battery pack cover 103, but the battery pack case 102 is provided. It may be formed so as to extend from the inside of the battery pack 101 to the outside through the battery pack 101. Further, the first to fourth battery terminals 4 to 7 may be directly attached to the battery pack case 102 or the battery pack cover 103.

図８は、電池パックカバー１０３を取り外した状態における、本発明の第２の実施形態に係る電池パック１０１を概略的に示す平面図である。図８に示したように、電池パックケース１０２内には、電子機器９と、複数の電池モジュール１０’と、第１乃至第４の電池端子４乃至７と、が配置される。また、電池モジュール１０’は、平板状電池２１、外側固定部材２２、第１の接続部材２３及び第２の接続部材２４に加え、平板状電池２１の積層方向において平板状電池２１、外側固定部材２２、第１の接続部材２３及び第２の接続部材２４と並列に配置された板状の第３の接続部材２５をさらに備える。 FIG. 8 is a plan view schematically showing the battery pack 101 according to the second embodiment of the present invention in a state where the battery pack cover 103 is removed. As shown in FIG. 8, the electronic device 9, the plurality of battery modules 10', and the first to fourth battery terminals 4 to 7 are arranged in the battery pack case 102. Further, in the battery module 10', in addition to the flat plate battery 21, the outer fixing member 22, the first connecting member 23 and the second connecting member 24, the flat plate battery 21 and the outer fixing member are provided in the stacking direction of the flat plate battery 21. 22, a plate-shaped third connecting member 25 arranged in parallel with the first connecting member 23 and the second connecting member 24 is further provided.

図８に示す例では、第３及び第４の電池端子６及び７は、第１及び第２の電池端子４及び５が設けられている前側とは反対側である後側に設けられている。また、第３の接続部材２５は、第２の接続部材２４において外側固定部材２２が設けられている側面とは反対側の側面上に設けられている。本実施形態では、第１の電池端子４及び第３の電池端子６を正極とし、第２の電池端子５及び第４の電池端子７を負極とした。 In the example shown in FIG. 8, the third and fourth battery terminals 6 and 7 are provided on the rear side opposite to the front side where the first and second battery terminals 4 and 5 are provided. .. Further, the third connecting member 25 is provided on the side surface of the second connecting member 24 opposite to the side surface on which the outer fixing member 22 is provided. In the present embodiment, the first battery terminal 4 and the third battery terminal 6 are positive electrodes, and the second battery terminal 5 and the fourth battery terminal 7 are negative electrodes.

第３の接続部材２５も、第１及び第２の接続部材２３及び２４と同様の構成を有しており、板状の接続部材本体３１と、接続部材本体３１の相対する側面に設けられた２つの接続端子３２、３３と、を備える。第３の接続部材２５の接続部材本体３１において接続端子３２、３３が設けられていない広い側面上には、絶縁性部材３５が設けられる。 The third connecting member 25 also has the same configuration as the first and second connecting members 23 and 24, and is provided on the side surfaces of the plate-shaped connecting member main body 31 and the connecting member main body 31 facing each other. It includes two connection terminals 32 and 33. The insulating member 35 is provided on the wide side surface of the connecting member main body 31 of the third connecting member 25 where the connecting terminals 32 and 33 are not provided.

各電池モジュール１０’を構成する第３の接続部材２５も、第１及び第２の接続部材２３及び２４と同様に、その第１の接続端子３２が各電池モジュール１０’の後側に配置されると共に、第２の接続端子３３が各電池モジュール１０’の前側に配置される。この結果、隣り合う電池モジュール１０’のうち一方の電池モジュール１０’の第３の接続部材２５の第１の接続端子３２と、他方の電池モジュール１０’の第３の接続部材２５の第２の接続端子３３とが対向する。 Similar to the first and second connection members 23 and 24, the third connection member 25 constituting each battery module 10'is also arranged with its first connection terminal 32 on the rear side of each battery module 10'. At the same time, the second connection terminal 33 is arranged on the front side of each battery module 10'. As a result, the first connection terminal 32 of the third connection member 25 of one of the adjacent battery modules 10'and the second connection member 25 of the third connection member 25 of the other battery module 10' It faces the connection terminal 33.

最後列の電池モジュール１０’の第３の接続部材２５の第１の接続端子３２は正極である第３の電池端子６に接続され、当該電池モジュール１０’の第２の接続部材２４の第１の接続端子３２は、連結部材２６を介して平板状電池２１に接続されるとともに、負極である第４の電池端子７に接続されている。また、最前列の電池モジュール１０’の第３の接続部材２５の第２の接続端子３３は第１の電池端子４を介してその電池モジュール１０’の第１の接続部材２３の第２の接続端子３３に接続されている。斯かる配置及び接続により、第３の接続部材２５と第２の接続部材２４とで、それらの接続端子３２は極性が互いに逆になり、それらの接続端子３３は極性が互いに逆になる。 The first connection terminal 32 of the third connection member 25 of the battery module 10'in the last row is connected to the third battery terminal 6 which is a positive electrode, and the first connection member 24 of the second connection member 24 of the battery module 10'is connected. The connection terminal 32 is connected to the flat plate battery 21 via the connecting member 26, and is also connected to the fourth battery terminal 7, which is a negative electrode. Further, the second connection terminal 33 of the third connection member 25 of the battery module 10'in the front row is the second connection of the first connection member 23 of the battery module 10' via the first battery terminal 4. It is connected to the terminal 33. Due to such arrangement and connection, in the third connecting member 25 and the second connecting member 24, the polarities of the connection terminals 32 are opposite to each other, and the polarities of the connection terminals 33 are opposite to each other.

図８に示す例では、第４の電池モジュール１０’ｄの第３の接続部材２５の接続端子３２は、第３の電池端子６に接続されている。また、第２の電池モジュール１０’ｂの第３の接続部材２５の第１の接続端子３２は第３の電池モジュール１０’ｃの第３の接続部材２５の第２の接続端子３３に接続され、第３の電池モジュール１０’ｃの第３の接続部材２５の第１の接続端子３２は第４の電池モジュール１０’ｄの第３の接続部材２５の第２の接続端子３３に接続されている。さらに、第１の電池モジュール１０ａの第３の接続部材２５の第２の接続端子３３は、第１の電池端子４を介して第１の電池モジュール１０ａの第１の接続部材２３の第２の接続端子３３に接続されている。 In the example shown in FIG. 8, the connection terminal 32 of the third connection member 25 of the fourth battery module 10'd is connected to the third battery terminal 6. Further, the first connection terminal 32 of the third connection member 25 of the second battery module 10'b is connected to the second connection terminal 33 of the third connection member 25 of the third battery module 10'c. , The first connection terminal 32 of the third connection member 25 of the third battery module 10'c is connected to the second connection terminal 33 of the third connection member 25 of the fourth battery module 10'd. There is. Further, the second connection terminal 33 of the third connection member 25 of the first battery module 10a is the second connection member 23 of the first connection member 23 of the first battery module 10a via the first battery terminal 4. It is connected to the connection terminal 33.

図９は、電池パックカバー１０３を取り外した状態における、本発明の第２の実施形態に係る電池パック１０１の電流経路を示す平面図である。本発明の第２の実施形態に係る電池パック１０１では、第１及び第２の電池端子４及び５が外部に接続された場合には図６において示した電流経路で第１の電池端子４から第２の電池端子５に電流が流れることに加え、第３及び第４の電池端子６及び７が外部に接続された場合には図９に示す電流経路で第３の電池端子６から第４の電池端子７に電流が流れる。 FIG. 9 is a plan view showing a current path of the battery pack 101 according to the second embodiment of the present invention in a state where the battery pack cover 103 is removed. In the battery pack 101 according to the second embodiment of the present invention, when the first and second battery terminals 4 and 5 are connected to the outside, the current path shown in FIG. 6 is used from the first battery terminal 4. In addition to the current flowing through the second battery terminal 5, when the third and fourth battery terminals 6 and 7 are connected to the outside, the third battery terminal 6 to the fourth battery terminal 6 to the fourth battery terminal 6 to the fourth in the current path shown in FIG. Current flows through the battery terminal 7 of.

具体的には、図９に示すように、本発明の第２の実施形態に係る電池パック１０１では、正極である第３の電池端子６は第４の電池モジュール１０’ｄの第３の接続部材２５の第１の接続端子３２に接続されている。第４の電池モジュール１０’ｄの第３の接続部材２５の第２の接続端子３３は第３の電池モジュール１０’ｃの第３の接続部材２５の第１の接続端子３２に接続されている。隣り合う電池モジュール１０’のる第３の接続部材２５同氏は、一方の電池モジュール１０’の第１の接続端子３２と他方の電池モジュール１０’における第３の接続部材２５の第２の接続端子３３とが連結部材２６によって接続されている。そのため、第３の電池端子６から、第４の電池モジュール１０’ｄの第３の接続部材２５、第３の電池モジュール１０’ｃの第３の接続部材２５、第２の電池モジュール１０’ｂの第３の接続部材２５、第１の電池モジュール１０’ａの第３の接続部材２５の経路で電流が流れる。 Specifically, as shown in FIG. 9, in the battery pack 101 according to the second embodiment of the present invention, the third battery terminal 6 which is the positive electrode is the third connection of the fourth battery module 10'd. It is connected to the first connection terminal 32 of the member 25. The second connection terminal 33 of the third connection member 25 of the fourth battery module 10'd is connected to the first connection terminal 32 of the third connection member 25 of the third battery module 10'c. .. The third connecting member 25 on which the adjacent battery modules 10'are located, he said, the first connecting terminal 32 of one battery module 10'and the second connecting terminal of the third connecting member 25 of the other battery module 10'. 33 is connected by a connecting member 26. Therefore, from the third battery terminal 6, the third connection member 25 of the fourth battery module 10'd, the third connection member 25 of the third battery module 10'c, and the second battery module 10'b. A current flows through the path of the third connecting member 25 and the third connecting member 25 of the first battery module 10'a.

また、第１の電池モジュール１０’ａの第３の接続部材２５の第２の接続端子３３は、第１の電池端子４を介して第１の電池モジュール１０’ａの第１の接続部材２３の第２の接続端子３３に接続されている。そのため、第１の電池モジュール１０’ａの第３の接続部材２５から第１の電池モジュール１０’ａの第１の接続部材２３へ電流が流れる。 Further, the second connection terminal 33 of the third connection member 25 of the first battery module 10'a is the first connection member 23 of the first battery module 10'a via the first battery terminal 4. It is connected to the second connection terminal 33 of. Therefore, a current flows from the third connecting member 25 of the first battery module 10'a to the first connecting member 23 of the first battery module 10'a.

電池モジュール１０’の右端及び左端の平板状電池２１のうちの一方は隣接する電池モジュール１０’の第１の接続部材２３の第２の接続端子３３と接続されている。そのため、第１の電池モジュール１０’ａの第１の接続部材２３から第１の電池モジュール１０’ａの左端の平板状電池２１、第１の電池モジュール１０’ａの左端の平板状電池２１から第２の電池モジュール１０’ｂの第１の接続部材２３、の経路で電流が流れる。以降、同様にして、第２の電池モジュール１０’ｂから第３の電池モジュール１０’ｃ、第３の電池モジュール１０’ｃから第４の電池モジュール１０’ｄへ電流が流れる。 One of the right-end and left-end flat battery 21 of the battery module 10'is connected to the second connection terminal 33 of the first connection member 23 of the adjacent battery module 10'. Therefore, from the first connection member 23 of the first battery module 10'a to the flat plate battery 21 at the left end of the first battery module 10'a, and from the flat plate battery 21 at the left end of the first battery module 10'a. A current flows through the path of the first connecting member 23 of the second battery module 10'b. Hereinafter, in the same manner, current flows from the second battery module 10'b to the third battery module 10'c, and from the third battery module 10'c to the fourth battery module 10'd.

さらに、第４の電池モジュール１０’ｄの第２の接続部材２４の第１の接続端子３２は第４の電池端子７に接続されている。そのため、第４の電池モジュール１０’ｄの第２の接続部材２４から第４の電池端子７へ電流が流れる。 Further, the first connection terminal 32 of the second connection member 24 of the fourth battery module 10'd is connected to the fourth battery terminal 7. Therefore, a current flows from the second connecting member 24 of the fourth battery module 10'd to the fourth battery terminal 7.

本実施形態によれば、図６で示したような第１の電池端子４から第４の電池モジュール１０ｄへの方向に向かった後に折り返されて第２の電池端子５に向かう電流経路に加え、図９で示したような第３の電池端子６から第１の電池モジュール１０ａへの方向に向かった後に折り返されて第４の電池端子７に向かう電流経路で電流を供給できるようになる。そのため、複数方向の出力が可能となり、前方及び後方にそれぞれ総正極端子及び総負極端子を設けることが可能となる。したがって、例えば前輪駆動用モーター及び後輪駆動用モーターを含む四輪駆動の自動車用に電池パックが用いられる場合など、出力方向が複数存在する場合であっても電池パック１０１内で無駄な配線を引き回す必要がないことから、斯かる用途においても高いエネルギ密度の電池パック１０１を実現することが可能となる。 According to the present embodiment, in addition to the current path toward the second battery terminal 5 after being turned back toward the fourth battery module 10d from the first battery terminal 4 as shown in FIG. As shown in FIG. 9, the current can be supplied through the current path from the third battery terminal 6 toward the first battery module 10a and then folded back toward the fourth battery terminal 7. Therefore, it is possible to output in a plurality of directions, and it is possible to provide a total positive electrode terminal and a total negative electrode terminal at the front and the rear, respectively. Therefore, even if there are multiple output directions, such as when a battery pack is used for a four-wheel drive vehicle including a front-wheel drive motor and a rear-wheel drive motor, useless wiring is provided in the battery pack 101. Since it is not necessary to route the battery pack 101, it is possible to realize a battery pack 101 having a high energy density even in such an application.

１、１０１ 電池パック
２、１０２ 電池パックケース
３、１０３ 電池パックカバー
４、５、６、７ 電池端子
９ 電子機器
１０、１０’ 電池モジュール
２１ 平板状電池
２２ 外側固定部材
２３ 第１の接続部材
２４ 第２の接続部材
２５ 第３の接続部材
２６ 連結部材
３１ 接続部材本体
３２、３３ 接続端子
３５ 絶縁性部材
５０ 電池素子
５１ 正極集電体層
５２ 正極活物質層
５３ 固体電解質層
５４ 負極活物質層
５５ 負極集電体層 1,101 Battery pack 2,102 Battery pack case 3,103 Battery pack cover 4, 5, 6, 7 Battery terminal 9 Electronic device 10, 10'Battery module 21 Flat plate battery 22 Outer fixing member 23 First connection member 24 2nd connection member 25 3rd connection member 26 Connection member 31 Connection member main body 32, 33 Connection terminal 35 Insulation member 50 Battery element 51 Positive current collector layer 52 Positive positive active material layer 53 Solid electrolyte layer 54 Negative negative active material layer 55 Negative electrode current collector layer

Claims (1)

積層された複数の平板状電池をそれぞれ含む複数の電池モジュールが配置された電池パックであって、前記複数の電池モジュールは、同一平面上において前記複数の平板状電池の積層方向に直交する方向に並んで配列され、前記複数の電池モジュールの各々は、
前記平板状電池の積層方向において前記平板状電池と並列に配置された板状の本体を有する第１の接続部材と、
前記平板状電池の積層方向において前記平板状電池及び前記第１の接続部材と並列に配置された板状の本体を有する第２の接続部材と、
を備え、
前記第１の接続部材及び前記第２の接続部材は、それぞれ互いに反対側に配置された第１の接続端子と第２の接続端子とを有し、
前記電池モジュールにおける前記第１の接続部材は、前記第１の接続端子において当該電池モジュールの前記平板状電池に接続され、前記第２の接続端子において隣接する前記電池モジュールの前記平板状電池に接続され、
並んで配列された前記複数の電池モジュールのうち一方の端に配置された電池モジュールの前記第２の接続部材は、前記第１の接続端子において当該電池モジュールの前記平板状電池と接続されており、
隣り合う前記電池モジュールのうちの一方の前記電池モジュールの前記第２の接続部材の前記第２の接続端子は、他方の前記電池モジュールの前記第２接続部材の前記第１の接続端子に接続されている、電池パック。 A battery pack in which a plurality of battery modules including a plurality of stacked flat batteries are arranged, and the plurality of battery modules are arranged on the same plane in a direction orthogonal to the stacking direction of the plurality of flat batteries. Arranged side by side, each of the plurality of battery modules
A first connecting member having a plate-shaped main body arranged in parallel with the flat-plate battery in the stacking direction of the flat-plate battery,
A second connecting member having a plate-shaped main body arranged in parallel with the flat plate-shaped battery and the first connecting member in the stacking direction of the flat-plate battery.
Equipped with
The first connecting member and the second connecting member each have a first connecting terminal and a second connecting terminal arranged on opposite sides of each other.
The first connection member in the battery module is connected at the first connection terminal to the flat battery of the battery module, the flat batteries of the battery module adjacent in the second connecting terminal Connected,
The second connection member of the battery module arranged at one end of the plurality of battery modules arranged side by side is connected to the flat plate battery of the battery module at the first connection terminal. ,
The second connection terminal of the second connection member of the battery module of one of the adjacent battery modules is connected to the first connection terminal of the second connection member of the other battery module. The battery pack.
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