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JP2021120939A - Battery pack and wire connection structure between battery stacks - Google Patents

Battery pack and wire connection structure between battery stacks Download PDF

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JP2021120939A
JP2021120939A JP2020014360A JP2020014360A JP2021120939A JP 2021120939 A JP2021120939 A JP 2021120939A JP 2020014360 A JP2020014360 A JP 2020014360A JP 2020014360 A JP2020014360 A JP 2020014360A JP 2021120939 A JP2021120939 A JP 2021120939A
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Prior art keywords
electric wire
stack
battery
terminal
battery pack
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JP7116105B2 (en
Inventor
淳 水島
Atsushi Mizushima
淳 水島
淳 渡邊
Atsushi Watanabe
淳 渡邊
慎輔 東
Shinsuke Higashi
慎輔 東
重行 井上
Shigeyuki Inoue
重行 井上
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Toyota Motor Corp
Yazaki Corp
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Toyota Motor Corp
Yazaki Corp
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Priority to JP2020014360A priority Critical patent/JP7116105B2/en
Priority to CN202011410286.2A priority patent/CN113206416B/en
Priority to DE102020215644.1A priority patent/DE102020215644A1/en
Publication of JP2021120939A publication Critical patent/JP2021120939A/en
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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
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R31/00—Coupling parts supported only by co-operation with counterpart
    • H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
    • 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
    • H01M50/298—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the wiring of battery packs
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/26—Connectors or connections adapted for particular applications for vehicles
    • 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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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

【課題】搭載スペースを小さくすることが可能な電池パック、及び、電池スタック同士の電線接続構造を提供する。【解決手段】電池パックは、一方の電池スタック２２と、この一方の電池スタック２２に対しスタック積層方向Ｐに配置される他方の電池スタック２３と、これら電池スタック同士を電気的に接続する電気接続部材２４とを備えて構成され、さらに、電気接続部材２４が、電線本体３７及びこの両端の電線端末部３８、３９を有する高電圧用の電線２９と、電線端末部３８、３９に設けられる一方の端子金具３０及び他方の端子金具３１とを備えて構成される。電線２９による電池スタック同士の接続状態においては、端子金具の中間部分である中間連続部４２に電線本体３７の一部が通過する構造になる。【選択図】図１１PROBLEM TO BE SOLVED: To provide a battery pack capable of reducing a mounting space and an electric wire connection structure between battery stacks. A battery pack is an electrical connection that electrically connects one battery stack 22 and the other battery stack 23 arranged in the stack stacking direction P with respect to the one battery stack 22. A member 24 is provided, and the electric connection member 24 is provided on the electric wire main body 37, the electric wire 29 for high voltage having the electric wire terminal portions 38, 39 at both ends thereof, and the electric wire terminal portions 38, 39. The terminal fitting 30 and the other terminal fitting 31 are provided. When the battery stacks are connected to each other by the electric wires 29, a part of the electric wire main body 37 passes through the intermediate continuous portion 42 which is an intermediate portion of the terminal fittings. [Selection diagram] FIG. 11

Description

本発明は、スタック積層方向に配置される一方・他方の電池スタックと、これらを電気的に接続する電気接続部材とを備える電池パックに関する。また、電池スタック同士の電線接続構造に関する。 The present invention relates to a battery pack including one or the other battery stack arranged in the stack stacking direction and an electrical connection member for electrically connecting them. Further, the present invention relates to an electric wire connection structure between battery stacks.

電気自動車やハイブリッド自動車に搭載される電池パックは、複数個の電池セルからなる電池スタックを備えて構成される。電池パックは、電気自動車やハイブリッド自動車の所定位置に搭載され、モーターを駆動するための電力供給源として用いられる。下記特許文献１に開示された電池パックは、二つの電池スタックを水平方向の同一平面上に横並びにして配置され、そして、この二つの電池スタック同士を電気接続部材で電気的に接続することにより形成される。電気接続部材は、複数のバスバーを積層してなる積層バスバーが採用される。積層バスバーは帯状にのびるように形成され、この両端側にはボルト挿通孔が貫通形成される。ボルト挿通孔は、電池スタックに立設するボルト軸部に挿通される。積層バスバーは、ボルト軸部にナットを締め付けることにより二つの電池スタックにそれぞれ固定される。尚、横並びになる二つの電池スタックの間隔のバラツキ吸収のため、積層バスバーの中間には変形許容部が形成される。この変形許容部は、半円弧状で伸縮となる変形が可能な形状に形成される。 A battery pack mounted on an electric vehicle or a hybrid vehicle includes a battery stack composed of a plurality of battery cells. The battery pack is mounted in a predetermined position in an electric vehicle or a hybrid vehicle and is used as a power supply source for driving a motor. In the battery pack disclosed in Patent Document 1 below, two battery stacks are arranged side by side on the same horizontal plane, and the two battery stacks are electrically connected to each other by an electric connecting member. It is formed. As the electrical connection member, a laminated bus bar formed by laminating a plurality of bus bars is adopted. The laminated bus bar is formed so as to extend in a band shape, and bolt insertion holes are formed through the both end sides thereof. The bolt insertion hole is inserted into the bolt shaft portion erected on the battery stack. The laminated bus bar is fixed to each of the two battery stacks by tightening a nut on the bolt shaft. A deformation allowable portion is formed in the middle of the laminated bus bars in order to absorb variations in the distance between the two battery stacks arranged side by side. The deformation allowable portion is formed in a semicircular arc shape so as to be deformable so as to expand and contract.

特開２０１８−１８１７８０号公報Japanese Unexamined Patent Publication No. 2018-181780

上記従来技術にあっては、二つの電池スタックが水平方向の同一平面上に横並びで配置される。この場合、二つの電池スタックの間隔は比較的狭くなることから、電気的な接続は短い積層バスバーで十分に行えるようになる。ところで図１２に示すように、二つの電池スタック１が上下になるような配置、すなわちスタック積層方向Ｐに配置されるような場合に、二つの電池スタック１の各電気的接続部分（ボルト軸部２、終極端子）の位置が比較的大きく離れることから、従来の積層バスバーを用いての接続が困難になってくる。そこで、高電圧用の太物の電線３（ケーブル）を含む電気接続部材４を用いて接続することを本願発明者は検討してみた。 In the above prior art, two battery stacks are arranged side by side on the same plane in the horizontal direction. In this case, the distance between the two battery stacks is relatively small, so that a short laminated bus bar is sufficient for electrical connection. By the way, as shown in FIG. 12, when the two battery stacks 1 are arranged vertically, that is, in the stack stacking direction P, each electrical connection portion (bolt shaft portion) of the two battery stacks 1 is arranged. 2. Since the positions of the final pole terminals) are relatively far apart, it becomes difficult to connect using the conventional laminated bus bar. Therefore, the inventor of the present application has examined the connection using an electric connection member 4 including a thick electric wire 3 (cable) for high voltage.

図１２において、上記電気接続部材４は、高電圧用の太物の電線３の他に、電線３の両端にそれぞれ設けられる端子金具５を備えて構成される。端子金具５は、上記各ボルト軸部２が上記スタック積層方向Ｐに配置されることから、図示のような三次元的な形状に形成される。具体的には、スタック接続部６と、電線接続部７と、これらの中間に位置する中間連続部８とを有し、スタック接続部６に対し中間連続部８が９０度に折れ曲がった形状に、また、中間連続部８及び電線接続部７がＬ字状になる形状に形成される。このような端子金具７においては、電線接続部７が電池スタック１の一側面９に向けてのびる状態に配置される。電線３は、端子金具５の形状及び電線接続部７の配置が図示のようになることから、また、太物でコシがあり屈曲できる半径が大きくなるという特性もあることから、Ｃ字状に曲げた状態に配置（配索）される。 In FIG. 12, the electrical connection member 4 is configured to include terminal fittings 5 provided at both ends of the electric wire 3 in addition to the thick electric wire 3 for high voltage. Since each bolt shaft portion 2 is arranged in the stack stacking direction P, the terminal fitting 5 is formed in a three-dimensional shape as shown in the drawing. Specifically, it has a stack connecting portion 6, an electric wire connecting portion 7, and an intermediate continuous portion 8 located between them, and the intermediate continuous portion 8 is bent at 90 degrees with respect to the stack connecting portion 6. Further, the intermediate continuous portion 8 and the electric wire connecting portion 7 are formed in an L-shape. In such a terminal fitting 7, the electric wire connecting portion 7 is arranged so as to extend toward one side surface 9 of the battery stack 1. The electric wire 3 has a C-shape because the shape of the terminal fitting 5 and the arrangement of the electric wire connection portion 7 are as shown in the figure, and also because the electric wire 3 is thick and has a characteristic that the radius of bending is large. It is placed (arranged) in a bent state.

電線３を含む電気接続部材４を用いた接続の場合、電線３の本体中間１０が電池スタック１の一側面９から外側に出てしまう。これは図１２に示すように、二つの電池スタック１の一方（図中下側のもの）を水平方向Ｑに沿ってずらした場合でも外側に出てしまう。従って、このような接続の場合は、本体中間１０の突出分を考慮したスペース確保をしなければならないという問題点を有する。そして、このことにより、電池パックの搭載スペースも若干大きめに確保しなければならないという問題点を有する。 In the case of connection using the electric connection member 4 including the electric wire 3, the middle 10 of the main body of the electric wire 3 protrudes from one side surface 9 of the battery stack 1 to the outside. As shown in FIG. 12, even if one of the two battery stacks 1 (the one on the lower side in the figure) is shifted along the horizontal direction Q, it will come out. Therefore, in the case of such a connection, there is a problem that a space must be secured in consideration of the protrusion of the middle 10 of the main body. As a result, there is a problem that the mounting space for the battery pack must be secured slightly larger.

本発明は、上記した事情に鑑みてなされたもので、搭載スペースを小さくすることが可能な電池パック、及び、電池スタック同士の電線接続構造を提供することを課題とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a battery pack capable of reducing the mounting space and an electric wire connection structure between battery stacks.

上記課題を解決するためになされた請求項１に記載の本発明の電池パックは、一方の電池スタックと、該一方の電池スタックに対しスタック積層方向に配置される他方の電池スタックと、これら前記一方の電池スタック及び前記他方の電池スタックを電気的に接続する電気接続部材とを備え、該電気接続部材は、電線本体及びこの両端の電線端末部を有する高電圧用の電線と、前記電線端末部に設けられる一方の端子金具及び他方の端子金具とを備え、前記一方の端子金具及び／又は前記他方の端子金具は、スタック接続部と、電線接続部と、これら前記スタック接続部及び前記電線接続部の中間に位置して連続部分になる中間連続部とを有し、該中間連続部は、前記スタック接続部及び前記電線接続部を非直線的に配置する部分に形成されるとともに前記電線本体の一部を通過させる部分にも形成されることを特徴とする。 The battery pack of the present invention according to claim 1, which has been made to solve the above problems, includes one battery stack, the other battery stack arranged in the stack stacking direction with respect to the one battery stack, and the other battery stack. It includes an electric connection member that electrically connects one battery stack and the other battery stack, and the electric connection member includes a high-voltage electric wire having an electric wire main body and electric wire terminal portions at both ends thereof, and the electric wire terminal. One terminal fitting and the other terminal fitting provided on the portion are provided, and the one terminal fitting and / or the other terminal fitting includes a stack connection portion, an electric wire connection portion, and the stack connection portion and the electric wire. It has an intermediate continuous portion that is located in the middle of the connecting portion and becomes a continuous portion, and the intermediate continuous portion is formed in a portion where the stack connecting portion and the electric wire connecting portion are arranged non-linearly, and the electric wire. It is characterized in that it is also formed in a portion through which a part of the main body is passed.

このような請求項１の特徴を有する本発明によれば、実施例の欄で図を参照しながら詳細に説明するが、電線の配置をオフセットすることができる。電線の配置をオフセットすることができれば、電線本体の中間を電池スタックよりも外側に突出させずに配置することもでき、以て電池パックの搭載スペースを小さくすることができる。 According to the present invention having such a feature of claim 1, the arrangement of electric wires can be offset, which will be described in detail in the column of Examples with reference to the drawings. If the arrangement of the electric wires can be offset, the middle of the electric wires can be arranged without protruding outward from the battery stack, and thus the mounting space of the battery pack can be reduced.

請求項２に記載の本発明は、請求項１に記載の電池パックにおいて、前記中間連続部及び前記電線接続部は、平面視Ｌ字状に連続した形状に形成されることを特徴とする。 The present invention according to claim 2 is characterized in that, in the battery pack according to claim 1, the intermediate continuous portion and the electric wire connecting portion are formed in a continuous shape in an L shape in a plan view.

このような請求項２の特徴を有する本発明によれば、電線の配置をオフセットするにあたり、電線をスタック接続部から離すことができる。これによりスタック接続部での接続に係る作業をし易くすることができる。 According to the present invention having such a feature of claim 2, the electric wire can be separated from the stack connection portion when offsetting the arrangement of the electric wire. This makes it possible to facilitate the work related to the connection at the stack connection portion.

請求項３に記載の本発明は、請求項１又は２に記載の電池パックにおいて、前記電線接続部及び前記電線端末部の接続の部分は、圧着、圧接、溶着、及び接着のうち、いずれかの接続にて形成されることを特徴とする。 According to the third aspect of the present invention, in the battery pack according to the first or second aspect, the electric wire connecting portion and the connecting portion of the electric wire terminal portion are made of any one of crimping, pressure welding, welding, and adhesion. It is characterized in that it is formed by the connection of.

このような請求項３の特徴を有する本発明によれば、電線と端子金具との接続に係り、様々な接続形態を適用することができる。 According to the present invention having such a feature of claim 3, various connection forms can be applied in connection with the connection between the electric wire and the terminal fitting.

請求項４に記載の本発明は、請求項３に記載の電池パックにおいて、前記電線接続部は、前記電線端末部の導体部分を接続する導体接続部と、前記電線端末部の絶縁体部分を固定する絶縁体固定部とを有し、該絶縁体固定部が前記導体接続部よりも前記中間連続部側に配置されることを特徴とする。 According to the fourth aspect of the present invention, in the battery pack according to the third aspect, the electric wire connecting portion includes a conductor connecting portion connecting the conductor portion of the electric wire terminal portion and an insulator portion of the electric wire terminal portion. It has an insulator fixing portion to be fixed, and the insulator fixing portion is arranged on the intermediate continuous portion side with respect to the conductor connecting portion.

このような請求項４の特徴を有する本発明によれば、端子金具の中間連続部に電線本体の一部を通過させて電線の配置をオフセットするにあたり、絶縁体固定部にて電線端末部の絶縁体部分を固定し、電線の配置を安定させることができる。 According to the present invention having such a feature of claim 4, when a part of the electric wire body is passed through the intermediate continuous portion of the terminal fitting to offset the arrangement of the electric wire, the insulator fixing portion of the electric wire terminal portion is used. The insulator part can be fixed and the arrangement of electric wires can be stabilized.

請求項５に記載の本発明は、請求項１、２、３又は４に記載の電池パックにおいて、前記一方の電池スタック及び前記他方の電池スタックは、前記スタック積層方向に対し直交する方向にずれて配置されることを特徴とする。 According to the fifth aspect of the present invention, in the battery pack according to the first, second, third or fourth aspect, the one battery stack and the other battery stack are displaced in a direction orthogonal to the stack stacking direction. It is characterized in that it is arranged.

このような請求項５の特徴を有する本発明によれば、電線本体の中間を電池スタックよりも外側に突出させずに配置するにあたり、より良い形態を提供することができる。 According to the present invention having such a feature of claim 5, it is possible to provide a better form in arranging the middle of the electric wire body without protruding outward from the battery stack.

請求項６に記載の本発明は、請求項１、２、３、４又は５に記載の電池パックにおいて、当該電池パックは、少なくとも前記電線接続部及び前記電線端末部の接続の部分を覆うカバー部材を更に備えることを特徴とする。 The present invention according to claim 6 is the battery pack according to claim 1, 2, 3, 4 or 5, wherein the battery pack covers at least the connection portion of the electric wire connection portion and the electric wire terminal portion. It is characterized by further including a member.

このような請求項６の特徴を有する本発明によれば、少なくとも接続の部分をカバー部材続にて保護することができる。尚、カバー部材を樹脂製にすれば絶縁性を確保することもできる。 According to the present invention having such a feature of claim 6, at least the connecting portion can be protected by the cover member continuation. If the cover member is made of resin, the insulating property can be ensured.

また、上記課題を解決するためになされた請求項７に記載の本発明の電池スタック同士の電線接続構造は、一方の電池スタックと、該一方の電池スタックに対しスタック積層方向に配置される他方の電池スタックと、これら前記一方の電池スタック及び前記他方の電池スタックを電気的に接続する電気接続部材とを備え、該電気接続部材は、電線本体及びこの両端の電線端末部を有する高電圧用の電線と、前記電線端末部に設けられる一方の端子金具及び他方の端子金具とを備え、前記一方の端子金具及び／又は前記他方の端子金具は、スタック接続部と、電線接続部と、これら前記スタック接続部及び前記電線接続部の中間に位置して連続部分になる中間連続部とを有し、該中間連続部は、前記スタック接続部及び前記電線接続部を非直線的に配置する部分に形成され、前記電線による前記一方の電池スタック及び前記他方の電池スタックの接続の状態においては、前記中間連続部に前記電線本体の一部が通過することを特徴とする。 Further, the electric wire connection structure between the battery stacks of the present invention according to claim 7, which is made to solve the above problems, has one battery stack and the other arranged in the stack stacking direction with respect to the one battery stack. The battery stack is provided with an electric connection member for electrically connecting the one battery stack and the other battery stack, and the electric connection member is for a high voltage having an electric wire main body and electric wire terminal portions at both ends thereof. The electric wire, one terminal fitting and the other terminal fitting provided on the electric wire terminal portion are provided, and the one terminal fitting and / or the other terminal fitting includes a stack connection portion, an electric wire connection portion, and the like. It has an intermediate continuous portion that is located between the stack connecting portion and the electric wire connecting portion and becomes a continuous portion, and the intermediate continuous portion is a portion in which the stack connecting portion and the electric wire connecting portion are arranged non-linearly. In the state where the one battery stack and the other battery stack are connected by the electric wire, a part of the electric wire main body passes through the intermediate continuous portion.

このような請求項７の特徴を有する本発明によれば、実施例の欄で図を参照しながら詳細に説明するが、電線の配置をオフセットする構造を提供することができる。電線の配置をオフセットする構造により、電線本体の中間を電池スタックよりも外側に突出させずに配置することができ、以て電池パックの搭載スペースを小さくすることができる。 According to the present invention having such a feature of claim 7, a structure for offsetting the arrangement of electric wires can be provided, which will be described in detail in the column of Examples with reference to the drawings. Due to the structure of offsetting the arrangement of the electric wires, the middle of the electric wires can be arranged without protruding outward from the battery stack, and thus the mounting space of the battery pack can be reduced.

本発明の電池パック、及び、電池スタック同士の電線接続構造によれば、搭載スペースを小さくすることができるという効果を奏する。 According to the battery pack of the present invention and the electric wire connection structure between the battery stacks, the mounting space can be reduced.

本発明の電池パック、及び、電池スタック同士の電線接続構造の一実施形態を示す図であり、Ｒ方向から見た図である。It is a figure which shows one Embodiment of the electric wire connection structure of the battery pack of this invention, and the battery stack, and is the figure seen from the R direction. 本発明の電池パック、及び、電池スタック同士の電線接続構造の一実施形態を示す図であり、Ｑ方向から見た図である。It is a figure which shows one Embodiment of the electric wire connection structure of the battery pack of this invention, and the battery stack, and is the figure seen from the Q direction. 一方の電池スタックの接続状態を示す斜視図である。It is a perspective view which shows the connection state of one battery stack. 一方の端子金具及び電線端末部の接続状態を示す図である。It is a figure which shows the connection state of one terminal metal fitting and the electric wire terminal part. 一方の端子金具を導体接続部の側から見た斜視図である。It is a perspective view which saw one terminal metal fitting from the side of a conductor connection part. 一方の端子金具を絶縁体固定部の側から見た斜視図である。It is a perspective view which saw one terminal metal fitting from the side of the insulator fixing part. 他方の電池スタックの接続状態を示す斜視図である。It is a perspective view which shows the connection state of the other battery stack. 他方の端子金具及び電線端末部の接続状態を示す図である。It is a figure which shows the connection state of the other terminal metal fitting and the electric wire terminal part. 他方の端子金具を導体接続部の側から見た斜視図である。It is a perspective view which looked at the other terminal metal fitting from the side of the conductor connection part. 他方の端子金具を絶縁体固定部の側から見た斜視図である。It is a perspective view which looked at the other terminal metal fitting from the side of the insulator fixing part. 電線のオフセット状態を示す図である。It is a figure which shows the offset state of an electric wire. 従来の積層バスバーでなく高電圧用の太物の電線を用いて接続することに関する検討図である。It is a study diagram about connecting using the thick electric wire for high voltage instead of the conventional laminated bus bar.

電池パックは、一方の電池スタックと、この一方の電池スタックに対しスタック積層方向に配置される他方の電池スタックと、これら電池スタック同士を電気的に接続する電気接続部材とを備えて構成され、さらに、電気接続部材が、電線本体及びこの両端の電線端末部を有する高電圧用の電線と、電線端末部に設けられる一方の端子金具及び他方の端子金具とを備えて構成される。電線による電池スタック同士の接続状態においては、端子金具の中間部分である中間連続部に電線本体の一部が通過する構造になる。 The battery pack includes one battery stack, the other battery stack arranged in the stack stacking direction with respect to the one battery stack, and an electric connection member for electrically connecting the battery stacks to each other. Further, the electrical connection member is configured to include a high-voltage electric wire having an electric wire main body and electric wire terminal portions at both ends thereof, and one terminal fitting and the other terminal fitting provided on the electric wire terminal portion. In the state where the battery stacks are connected by electric wires, a part of the electric wire main body passes through the intermediate continuous portion which is the intermediate portion of the terminal fittings.

以下、図面を参照しながら実施例を説明する。図１及び図２は本発明の電池パック、及び、電池スタック同士の電線接続構造の一実施形態を示す図である。また、図３は一方の電池スタックの接続状態を示す斜視図、図４〜図６は一方の端子金具に関する図である。また、図７は他方の電池スタックの接続状態を示す斜視図、図８〜図１０は他方の端子金具に関する図である。また、図１１は電線のオフセット状態を示す図である。尚、図中の矢印Ｐ方向はスタック積層方向（一方・他方の電池スタック同士を積層する方向のことであり、図では上下となる方向に一致）、矢印Ｑ方向は水平方向、矢印Ｒ方向はこれらに直交する方向を示すものとする。 Hereinafter, examples will be described with reference to the drawings. 1 and 2 are diagrams showing an embodiment of a battery pack of the present invention and an electric wire connection structure between battery stacks. Further, FIG. 3 is a perspective view showing a connected state of one battery stack, and FIGS. 4 to 6 are views relating to one terminal fitting. Further, FIG. 7 is a perspective view showing a connected state of the other battery stack, and FIGS. 8 to 10 are views relating to the other terminal fitting. Further, FIG. 11 is a diagram showing an offset state of the electric wire. The arrow P direction in the figure is the stack stacking direction (the direction in which one and the other battery stacks are stacked, which coincides with the vertical direction in the figure), the arrow Q direction is the horizontal direction, and the arrow R direction is. It shall indicate the direction orthogonal to these.

＜電池パック２１について＞
図１及び図２において、電池パック２１は、電気自動車やハイブリッド自動車の所定位置に搭載され、モーターを駆動するための電力供給源として用いられる。電池パック２１と上記モーターとの間には、ジャンクションブロック（電気接続箱）やインバータ等の公知の機器が配置される。電池パック２１は、一方の電池スタック２２と、この一方の電池スタック２２に対し矢印Ｐ方向（スタック積層方向）に配置される他方の電池スタック２３と、これら一方の電池スタック２２及び他方の電池スタック２３を電気的に接続する電気接続部材２４とを備えて構成される。電池パック２１は、このような構成を含んでモジュール化される。尚、本実施例においては電池スタックの数が二つであるが、これ以上の数であってもよいものとする。 <About battery pack 21>
In FIGS. 1 and 2, the battery pack 21 is mounted at a predetermined position in an electric vehicle or a hybrid vehicle and is used as a power supply source for driving a motor. A known device such as a junction block (electrical junction box) or an inverter is arranged between the battery pack 21 and the motor. The battery pack 21 includes one battery stack 22, the other battery stack 23 arranged in the arrow P direction (stack stacking direction) with respect to the one battery stack 22, the one battery stack 22 and the other battery stack. It is configured to include an electrical connection member 24 that electrically connects the 23. The battery pack 21 is modularized including such a configuration. In this embodiment, the number of battery stacks is two, but the number may be larger than this.

＜一方の電池スタック２２及び他方の電池スタック２３について＞
図１及び図２において、一方の電池スタック２２及び他方の電池スタック２３は、複数個の電池セルと、この複数個の電池セルを直列に繋ぐバスバーモジュールと、電気的接続部分（終極端子）になるボルト軸部２５と、このボルト軸部２５に螺合するナット２６と、絶縁性のケースとを備えて構成される。一方の電池スタック２２及び他方の電池スタック２３は、それぞれ複数個の電池セルの集合体になる。電池セルは、電力を蓄電するバッテリーとしての機能を有するものであり、この電池セルが所定方向（本実施例では矢印Ｐ方向に対し直交方向）に沿って並んで配置される。ボルト軸部２５は、上記の如く終極端子であって、複数個の電池セルの上記並びの端末位置に配置される。ボルト軸部２５は、平面形状の端子接続面（図示省略）から突出するように設けられる。 <About one battery stack 22 and the other battery stack 23>
In FIGS. 1 and 2, one battery stack 22 and the other battery stack 23 are connected to a plurality of battery cells, a bus bar module connecting the plurality of battery cells in series, and an electrical connection portion (final terminal). A bolt shaft portion 25, a nut 26 screwed into the bolt shaft portion 25, and an insulating case are provided. One battery stack 22 and the other battery stack 23 are aggregates of a plurality of battery cells, respectively. The battery cells have a function as a battery for storing electric power, and the battery cells are arranged side by side in a predetermined direction (in this embodiment, a direction orthogonal to the arrow P direction). The bolt shaft portion 25 is a terminal terminal as described above, and is arranged at the terminal positions of the plurality of battery cells in the same arrangement. The bolt shaft portion 25 is provided so as to project from a planar terminal connecting surface (not shown).

一方の電池スタック２２及び他方の電池スタック２３は、矢印Ｐ方向（スタック積層方向）に所定の間隔Ｓ１をあけて配置される。また、一方の電池スタック２２及び他方の電池スタック２３は、これらの一側面２７同士を矢印Ｑ方向（水平方向）に間隔Ｓ２でずらすように配置される。さらに、一方の電池スタック２２及び他方の電池スタック２３は、これらの他側面２８同士を矢印Ｒ方向（水平方向）に間隔Ｓ３でずらすように配置される。尚、以上のずらした配置は一例であるものとする。すなわち、間隔Ｓ１をあけただけの配置でもよいものとする。 One battery stack 22 and the other battery stack 23 are arranged at predetermined intervals S1 in the arrow P direction (stack stacking direction). Further, one battery stack 22 and the other battery stack 23 are arranged so that one side surface 27 thereof is displaced from each other in the arrow Q direction (horizontal direction) at an interval S2. Further, the one battery stack 22 and the other battery stack 23 are arranged so that the other side surfaces 28 are displaced from each other in the arrow R direction (horizontal direction) at an interval S3. The above staggered arrangement is an example. That is, the arrangement may be such that only the interval S1 is spaced.

＜電気接続部材２４について＞
図１及び図２において、電気接続部材２４は、高電圧用の太物の電線２９と、一方の端子金具３０及び他方の端子金具３１と、一方のカバー部材３２及び他方のカバー部材３３とを備えて構成される。電気接続部材２４は、電線２９を用いたものが採用される。電気接続部材２４は、一方の電池スタック２２及び他方の電池スタック２３を電気的に接続するために備えられ、従来の積層バスバーよりも長く且つ電線２９の部分では曲げ変形可能に形成される。電気接続部材２４は、電線２９の部分が曲げ変形可能であることから、一方の端子金具３０及び他方の端子金具３１への組み付け作業を従来の積層バスバーと比べてし易くすることができる。電気接続部材２４は、本発明の特徴を有する部材である。以下、電気接続部材２４の上記構成について説明をする。 <About the electrical connection member 24>
In FIGS. 1 and 2, the electrical connection member 24 includes a thick electric wire 29 for high voltage, one terminal fitting 30 and the other terminal fitting 31, and one cover member 32 and the other cover member 33. Be prepared. As the electric connection member 24, one using an electric wire 29 is adopted. The electrical connection member 24 is provided for electrically connecting one battery stack 22 and the other battery stack 23, and is formed to be longer than the conventional laminated bus bar and to be bendable and deformable at the portion of the electric wire 29. Since the portion of the electric wire 29 of the electric connection member 24 can be bent and deformed, the work of assembling to one terminal fitting 30 and the other terminal fitting 31 can be facilitated as compared with the conventional laminated bus bar. The electrical connection member 24 is a member having the characteristics of the present invention. Hereinafter, the above-mentioned configuration of the electrical connection member 24 will be described.

＜電線２９について＞
図１ないし図１０において、電線２９は、上記の如く高電圧用の太物であって、太物であることからコシがあり、屈曲できる半径が大きくなるという特性を有する。電線２９は、一方の電池スタック２２及び他方の電池スタック２３の間において、Ｃ字状に曲げた状態に配置（配索）することができる長さに形成される。別な言い方をすれば、電線２９は配置（配索）のために余長を持たせたものに形成される。電線２９は、図から分かるように一本である。電線２９は、導電性を有する導体３４と、絶縁性を有して導体３４を覆う絶縁体３５と、同じく絶縁性を有して絶縁体３５を覆うシース３６とを備えて構成される。導体３４は、銅や銅合金、アルミニウムやアルミニウム合金からなる金属素線を撚り合わせて断面円形状にしたものに形成される（金属素線は一例であり、例えば曲げ可能な丸棒等であってもよいものとする）。絶縁体３５やシース３６は、熱可塑性樹脂材料を用いて押出成形される。絶縁体３５やシース３６は、断面円形状の被覆として形成される。絶縁体３５やシース３６は、所定の厚みを有する。熱可塑性樹脂としては、公知の様々な種類のものが使用可能であるが、例えばポリ塩化ビニル樹脂やポリエチレン樹脂、ポリプロピレン樹脂などの高分子材料が好適である。尚、シース３６の有無は任意であるものとする。 <About electric wire 29>
In FIGS. 1 to 10, the electric wire 29 is a thick material for high voltage as described above, and since it is a thick material, it has a characteristic that it is elastic and the radius that can be bent becomes large. The electric wire 29 is formed in a length that can be arranged (arranged) in a C-shaped bent state between one battery stack 22 and the other battery stack 23. In other words, the electric wire 29 is formed to have an extra length for arrangement (arrangement). As can be seen from the figure, the electric wire 29 is one. The electric wire 29 includes a conductor 34 having conductivity, an insulator 35 having insulation and covering the conductor 34, and a sheath 36 having the same insulation and covering the insulator 35. The conductor 34 is formed by twisting a metal wire made of copper, a copper alloy, or an aluminum or an aluminum alloy to form a circular cross section (the metal wire is an example, for example, a bendable round bar or the like. May be acceptable). The insulator 35 and the sheath 36 are extruded using a thermoplastic resin material. The insulator 35 and the sheath 36 are formed as a coating having a circular cross section. The insulator 35 and the sheath 36 have a predetermined thickness. As the thermoplastic resin, various known types can be used, and polymer materials such as polyvinyl chloride resin, polyethylene resin, and polypropylene resin are suitable. The presence or absence of the sheath 36 is optional.

以上のような構成の電線２９は、これを全長方向の「部分」で分ければ、電線本体３７と、この電線本体３７の両端の電線端末部３８、３９とを有する。電線本体３７は、電線２９の全長における大半を占める部分になる（本実施例では電線端末部３８、３９の側のシース３６が比較的長く除去された状態に形成される）。電線端末部３８、３９は、皮剥により導体３４及び絶縁体３５を露出させた状態に形成される。露出させた導体３４は、一方の端子金具３０及び他方の端子金具３１に対し電気的に接続される部分に形成される。また、露出させた絶縁体３５は、一方の端子金具３０及び他方の端子金具３１に対し固定される部分に形成される。露出させた絶縁体３５は、一方の端子金具３０及び他方の端子金具３１に対し後述する通過部分に連続するように形成される。 The electric wire 29 having the above configuration has an electric wire main body 37 and electric wire terminal portions 38 and 39 at both ends of the electric wire main body 37 if it is divided by "parts" in the overall length direction. The electric wire main body 37 is a portion that occupies most of the total length of the electric wire 29 (in this embodiment, the sheath 36 on the side of the electric wire terminal portions 38 and 39 is formed in a state where it is removed for a relatively long time). The electric wire terminal portions 38 and 39 are formed in a state where the conductor 34 and the insulator 35 are exposed by peeling. The exposed conductor 34 is formed at a portion that is electrically connected to one terminal fitting 30 and the other terminal fitting 31. Further, the exposed insulator 35 is formed at a portion fixed to one terminal fitting 30 and the other terminal fitting 31. The exposed insulator 35 is formed so as to be continuous with the passing portion described later with respect to one terminal fitting 30 and the other terminal fitting 31.

＜一方の端子金具３０について＞
図３ないし図６において、一方の端子金具３０は、電線２９の電線端末部３８に設けられて一方の電池スタック２２の電気的接続部分（終極端子）に接続される。一方の端子金具３０は、導電性を有する金属板を加工して形成される。一方の端子金具３０は、スタック接続部４０と、電線接続部４１と、中間連続部４２とを有して図示形状に連続形成される。すなわち、スタック接続部４０に対し中間連続部４２が９０度に折れ曲がった形状に形成されるとともに、中間連続部４２及び電線接続部４１が平面視Ｌ字状になる形状に形成される。 <About one terminal fitting 30>
In FIGS. 3 to 6, one terminal fitting 30 is provided at the electric wire terminal portion 38 of the electric wire 29 and is connected to the electrical connection portion (final terminal) of the one battery stack 22. One terminal fitting 30 is formed by processing a conductive metal plate. One terminal fitting 30 has a stack connecting portion 40, an electric wire connecting portion 41, and an intermediate continuous portion 42, and is continuously formed in the illustrated shape. That is, the intermediate continuous portion 42 is formed in a shape bent at 90 degrees with respect to the stack connecting portion 40, and the intermediate continuous portion 42 and the electric wire connecting portion 41 are formed in a shape that is L-shaped in a plan view.

スタック接続部４０は、外形がＵ字状の板部分に形成される。スタック接続部４０は、一方の電池スタック２２の電気的接続部分における平面形状の端子接続面に対し面接触する部分に形成される。スタック接続部４０には、端子接続面から突出するボルト軸部２５に挿通されるボルト挿通孔４３が円形に形成される。スタック接続部４０と中間連続部４２との連続部分は、曲げ部（符号省略）として形成される。 The stack connection portion 40 is formed in a plate portion having a U-shaped outer shape. The stack connection portion 40 is formed at a portion of the electrical connection portion of one battery stack 22 that comes into surface contact with a planar terminal connection surface. In the stack connection portion 40, a bolt insertion hole 43 to be inserted into the bolt shaft portion 25 protruding from the terminal connection surface is formed in a circular shape. The continuous portion between the stack connecting portion 40 and the intermediate continuous portion 42 is formed as a bent portion (reference numeral omitted).

電線接続部４１は、中間連続部４２によってスタック接続部４０に対し非直線的に配置される。電線接続部４１は、中間連続部４２と共にＬ字状の板部分に形成される。電線接続部４１は、一方の電池スタック２２及び他方の電池スタック２３の一側面２７から離れる側に配置される。また、電線接続部４１は、一側面２７から離れる側にのびるように形成される。 The electric wire connecting portion 41 is arranged non-linearly with respect to the stack connecting portion 40 by the intermediate continuous portion 42. The electric wire connecting portion 41 is formed in an L-shaped plate portion together with the intermediate continuous portion 42. The electric wire connecting portion 41 is arranged on a side away from one side surface 27 of one battery stack 22 and the other battery stack 23. Further, the electric wire connecting portion 41 is formed so as to extend to a side away from one side surface 27.

このような電線接続部４１には、導体接続部４４と、絶縁体固定部４５とが形成される。導体接続部４４は、電線端末部３８の導体３４の部分を電気的に接続することができるように形成される。絶縁体固定部４５は、電線端末部３８の絶縁体３５の部分を固定することができるように形成される。導体接続部４４及び絶縁体固定部４５は、公知のバレル形状に形成される。尚、電線接続部４１及び電線端末部３８に係る接続の部分は、上記のような圧着の接続構造に限らないものとする。すなわち、圧接、溶着、接着、半田付けなど様々な接続の構造が採用可能であるものとする。導体接続部４４及び絶縁体固定部４５は、絶縁体固定部４５の方が導体接続部４４よりも中間連続部４２の側に配置される（図１２の電線接続部７と見比べてみると分かるが、配置が異なる点が特徴になる）。 A conductor connecting portion 44 and an insulator fixing portion 45 are formed in such an electric wire connecting portion 41. The conductor connecting portion 44 is formed so that the portion of the conductor 34 of the electric wire terminal portion 38 can be electrically connected. The insulator fixing portion 45 is formed so that the portion of the insulator 35 of the electric wire terminal portion 38 can be fixed. The conductor connecting portion 44 and the insulator fixing portion 45 are formed in a known barrel shape. The connection portion related to the electric wire connection portion 41 and the electric wire terminal portion 38 is not limited to the crimping connection structure as described above. That is, it is assumed that various connection structures such as pressure welding, welding, adhesion, and soldering can be adopted. The conductor connecting portion 44 and the insulator fixing portion 45 are arranged so that the insulator fixing portion 45 is closer to the intermediate continuous portion 42 than the conductor connecting portion 44 (compared with the electric wire connecting portion 7 in FIG. 12). However, the feature is that the arrangement is different).

中間連続部４２は、スタック接続部４０と電線接続部４１との中間に位置してこれらの連続部分になるように形成される。中間連続部４２は、導体接続部４４及び絶縁体固定部４５の配置から、図示の如く電線端末部３８に連続する（電線端末部３８に近い）電線本体３７の一部を通過させるような部分に形成される。すなわち、中間連続部４２は、電線本体３７の一部の被通過部分である電線被通過部４６を有するように形成される。電線被通過部４６は、電線本体３７の一部を載置することができるような部分にも形成される。 The intermediate continuous portion 42 is located between the stack connecting portion 40 and the electric wire connecting portion 41 and is formed so as to form a continuous portion thereof. The intermediate continuous portion 42 is a portion through which a part of the electric wire main body 37 continuous with the electric wire terminal portion 38 (close to the electric wire terminal portion 38) is passed from the arrangement of the conductor connecting portion 44 and the insulator fixing portion 45 as shown in the figure. Is formed in. That is, the intermediate continuous portion 42 is formed so as to have the electric wire passing portion 46 which is a part of the passing portion of the electric wire main body 37. The electric wire passing portion 46 is also formed in a portion on which a part of the electric wire main body 37 can be placed.

＜他方の端子金具３１について＞
図７ないし図１０において、本実施例の他方の端子金具３１は、一方の端子金具３０と同じものが採用される。そのため他方の端子金具３１もスタック接続部４０と、電線接続部４１と、中間連続部４２とを有するとともに、絶縁体固定部４５の方が導体接続部４４よりも中間連続部４２の側に配置され、且つ、電線被通過部４６が中間連続部４２に形成される。尚、電線接続部４１と中間連続部４２はＬ字状に形成されるが、これに限らず例えば若干鋭角の配置になる略Ｖ字状の板部分に形成されてもよいものとする。本発明の適用を一方の端子金具３０のみにすれば、他方の端子金具３１は一般的な構造にて形成されてもよいものとする。 <About the other terminal fitting 31>
In FIGS. 7 to 10, the other terminal fitting 31 of this embodiment is the same as the one terminal fitting 30. Therefore, the other terminal fitting 31 also has a stack connecting portion 40, an electric wire connecting portion 41, and an intermediate continuous portion 42, and the insulator fixing portion 45 is arranged closer to the intermediate continuous portion 42 than the conductor connecting portion 44. And, the electric wire passing portion 46 is formed in the intermediate continuous portion 42. The electric wire connecting portion 41 and the intermediate continuous portion 42 are formed in an L shape, but the present invention is not limited to this, and may be formed in, for example, a substantially V-shaped plate portion having a slightly acute-angled arrangement. If the present invention is applied only to one terminal fitting 30, the other terminal fitting 31 may be formed with a general structure.

＜一方のカバー部材３２について＞
図１ないし図３において、一方のカバー部材３２は、樹脂成形品であって、一方の端子金具３０と電線２９の電線端末部３８との接続の部分、及び、一方の端子金具３０の中間連続部４２を覆うことができるように形成される。一方のカバー部材３２は、外部や作業者に対し絶縁性を確保するために備えられる（必要に応じて備えるものとする）。一方のカバー部材３２は、カバー本体部４７と、カバー蓋体部４８とを有する。一方のカバー部材３２における引用符号４９はロック部を示す。 <About one cover member 32>
In FIGS. 1 to 3, one cover member 32 is a resin molded product, and is an intermediate continuous portion between one terminal fitting 30 and the electric wire terminal portion 38 of the electric wire 29, and one terminal fitting 30. It is formed so as to cover the portion 42. One cover member 32 is provided (provided as necessary) to ensure insulation from the outside and the operator. One cover member 32 has a cover main body portion 47 and a cover lid body portion 48. Reference mark 49 in one cover member 32 indicates a lock portion.

＜他方のカバー部材３３について＞
図１、図２、及び図７において、本実施例の他方のカバー部材３３は、一方のカバー部材３２と同じものが採用される。そのため他方のカバー部材３３もカバー本体部４７と、カバー蓋体部４８と、ロック部４９とを有する。 <About the other cover member 33>
In FIGS. 1, 2, and 7, the other cover member 33 of this embodiment is the same as the one cover member 32. Therefore, the other cover member 33 also has a cover main body portion 47, a cover lid portion 48, and a lock portion 49.

＜電池スタック同士を電気的に接続した状態について＞
図１及び図２において、矢印Ｐ方向（スタック積層方向）に配置される一方の電池スタック２２及び他方の電池スタック２３同士を電気接続部材２４により電気的に接続すると、電気接続部材２４の電線２９（電線本体３７）は他方の電池スタック２３の一側面２７から矢印Ｑ方向に突出することなく配置（配索）される。従って、電気接続部材４（図１２の検討図参照）における電線３の本体中間１０の場合には、図１１に示す如く外側に突出していたが、電気接続部材２４を採用すれば寸法線で示した分（オフセット寸法Ｘの分）だけ電線２９（３）の配置をオフセットすることができ、本体中間１０の突出分を考慮したスペース確保をする必要がない。 <About the state where the battery stacks are electrically connected>
In FIGS. 1 and 2, when one battery stack 22 and the other battery stack 23 arranged in the arrow P direction (stack stacking direction) are electrically connected by the electrical connection member 24, the electric wire 29 of the electrical connection member 24 is connected. (Electric wire body 37) is arranged (arranged) from one side surface 27 of the other battery stack 23 without protruding in the direction of arrow Q. Therefore, in the case of the middle 10 of the main body of the electric wire 3 in the electric connection member 4 (see the examination drawing of FIG. 12), it protruded outward as shown in FIG. 11, but if the electric connection member 24 is adopted, it is shown by a dimension line. The arrangement of the electric wires 29 (3) can be offset by the amount (offset dimension X), and it is not necessary to secure a space in consideration of the protrusion of the middle 10 of the main body.

＜効果について＞
以上、図１ないし図１１を参照しながら説明してきたように、本発明の一実施形態である電池パック２１や、電池スタック同士の電線接続構造によれば、中間連続部４２に電線被通過部４６を有し、且つ、絶縁体固定部４５の方が導体接続部４４よりも中間連続部４２の側に配置されることから、電線２９の配置をオフセットすることができる。従って、電線２９（電線本体３７）は他方の電池スタック２３の一側面２７から外側に突出することがなく、これにより突出分を考慮したスペース確保をする必要がないことから、結果、電池パック２１の搭載スペースを小さくすることができるという効果を奏する。 <About the effect>
As described above with reference to FIGS. 1 to 11, according to the battery pack 21 according to the embodiment of the present invention and the electric wire connection structure between the battery stacks, the electric wire passing portion is connected to the intermediate continuous portion 42. Since the insulator fixing portion 45 is arranged closer to the intermediate continuous portion 42 than the conductor connecting portion 44, the arrangement of the electric wires 29 can be offset. Therefore, the electric wire 29 (electric wire main body 37) does not protrude outward from one side surface 27 of the other battery stack 23, and it is not necessary to secure a space in consideration of the protruding portion. As a result, the battery pack 21 It has the effect of reducing the mounting space of the battery.

この他、一方の端子金具３０及び他方の端子金具３１は、中間連続部及び電線接続部が平面視Ｌ字状に連続した形状に形成されることから、図示の如く電線をスタック接続部から離すことができ、以てスタック接続部での接続に係る作業をし易くすることができるという効果も奏する。 In addition, in the one terminal fitting 30 and the other terminal fitting 31, the intermediate continuous portion and the electric wire connecting portion are formed in a continuous shape in a plan view L shape, so that the electric wires are separated from the stack connecting portion as shown in the drawing. This also has the effect of facilitating the work related to the connection at the stack connection portion.

本発明は本発明の主旨を変えない範囲で種々変更実施可能なことは勿論である。 It goes without saying that the present invention can be modified in various ways without changing the gist of the present invention.

Ｐ…スタック積層方向、 Ｑ…水平方向、 Ｘ…オフセット寸法、 ２１…電池パック、 ２２…一方の電池スタック、 ２３…他方の電池スタック、 ２４…電気接続部材、 ２５…ボルト軸部、 ２６…ナット、 ２７…一側面、 ２８…他側面、 ２９…電線、 ３０…一方の端子金具、 ３１…他方の端子金具、 ３２…一方のカバー部材、 ３３…他方のカバー部材、 ３４…導体、 ３５…絶縁体、 ３６…シース、 ３７…電線本体、 ３８、３９…電線端末部、 ４０…スタック接続部、 ４１…電線接続部、 ４２…中間連続部、 ４３…ボルト挿通孔、 ４４…導体接続部、 ４５…絶縁体固定部、 ４６…電線被通過部、 ４７…カバー本体部、 ４８…カバー蓋体部、 ４９…ロック部
P ... Stack stacking direction, Q ... Horizontal direction, X ... Offset dimensions, 21 ... Battery pack, 22 ... One battery stack, 23 ... Other battery stack, 24 ... Electrical connection member, 25 ... Bolt shaft, 26 ... Nut , 27 ... one side, 28 ... other side, 29 ... electric wire, 30 ... one terminal fitting, 31 ... the other terminal fitting, 32 ... one cover member, 33 ... the other cover member, 34 ... conductor, 35 ... insulation Body, 36 ... Sheath, 37 ... Electric wire body, 38, 39 ... Electric wire terminal, 40 ... Stack connection, 41 ... Electric wire connection, 42 ... Intermediate continuous part, 43 ... Bolt insertion hole, 44 ... Conductor connection, 45 ... Insulator fixing part, 46 ... Electric wire passing part, 47 ... Cover body part, 48 ... Cover lid part, 49 ... Lock part

Claims (7)

一方の電池スタックと、該一方の電池スタックに対しスタック積層方向に配置される他方の電池スタックと、これら前記一方の電池スタック及び前記他方の電池スタックを電気的に接続する電気接続部材とを備え、
該電気接続部材は、電線本体及びこの両端の電線端末部を有する高電圧用の電線と、前記電線端末部に設けられる一方の端子金具及び他方の端子金具とを備え、
前記一方の端子金具及び／又は前記他方の端子金具は、スタック接続部と、電線接続部と、これら前記スタック接続部及び前記電線接続部の中間に位置して連続部分になる中間連続部とを有し、
該中間連続部は、前記スタック接続部及び前記電線接続部を非直線的に配置する部分に形成されるとともに前記電線本体の一部を通過させる部分にも形成される
ことを特徴とする電池パック。 It includes one battery stack, the other battery stack arranged in the stack stacking direction with respect to the one battery stack, and an electrical connection member for electrically connecting the one battery stack and the other battery stack. ,
The electric connection member includes a wire body, a high-voltage electric wire having electric wire terminal portions at both ends thereof, and one terminal fitting and the other terminal fitting provided on the electric wire terminal portion.
The one terminal fitting and / or the other terminal fitting has a stack connection portion, an electric wire connection portion, and an intermediate continuous portion located between the stack connection portion and the electric wire connection portion to be a continuous portion. Have and
The battery pack is characterized in that the intermediate continuous portion is formed in a portion where the stack connection portion and the electric wire connection portion are arranged non-linearly, and is also formed in a portion through which a part of the electric wire main body is passed. .. 請求項１に記載の電池パックにおいて、
前記中間連続部及び前記電線接続部は、平面視Ｌ字状に連続した形状に形成される
ことを特徴とする電池パック。 In the battery pack according to claim 1,
A battery pack characterized in that the intermediate continuous portion and the electric wire connecting portion are formed in a continuous shape in an L shape in a plan view. 請求項１又は２に記載の電池パックにおいて、
前記電線接続部及び前記電線端末部の接続の部分は、圧着、圧接、溶着、及び接着のうち、いずれかの接続にて形成される
ことを特徴とする電池パック。 In the battery pack according to claim 1 or 2.
A battery pack characterized in that the electric wire connecting portion and the connecting portion of the electric wire terminal portion are formed by any one of crimping, pressure welding, welding, and adhesion. 請求項３に記載の電池パックにおいて、
前記電線接続部は、前記電線端末部の導体部分を接続する導体接続部と、前記電線端末部の絶縁体部分を固定する絶縁体固定部とを有し、該絶縁体固定部が前記導体接続部よりも前記中間連続部側に配置される
ことを特徴とする電池パック。 In the battery pack according to claim 3,
The electric wire connecting portion has a conductor connecting portion for connecting the conductor portion of the electric wire terminal portion and an insulator fixing portion for fixing the insulator portion of the electric wire terminal portion, and the insulator fixing portion connects the conductor. A battery pack characterized in that it is arranged on the intermediate continuous portion side of the portion. 請求項１、２、３又は４に記載の電池パックにおいて、
前記一方の電池スタック及び前記他方の電池スタックは、前記スタック積層方向に対し直交する方向にずれて配置される
ことを特徴とする電池パック。 In the battery pack according to claim 1, 2, 3 or 4.
A battery pack characterized in that the one battery stack and the other battery stack are arranged so as to be offset in a direction orthogonal to the stack stacking direction. 請求項１、２、３、４又は５に記載の電池パックにおいて、
当該電池パックは、少なくとも前記電線接続部及び前記電線端末部の接続の部分を覆うカバー部材を更に備える
ことを特徴とする電池パック。 In the battery pack according to claim 1, 2, 3, 4 or 5.
The battery pack is characterized by further including a cover member that covers at least the electric wire connecting portion and the connecting portion of the electric wire terminal portion. 一方の電池スタックと、該一方の電池スタックに対しスタック積層方向に配置される他方の電池スタックと、これら前記一方の電池スタック及び前記他方の電池スタックを電気的に接続する電気接続部材とを備え、
該電気接続部材は、電線本体及びこの両端の電線端末部を有する高電圧用の電線と、前記電線端末部に設けられる一方の端子金具及び他方の端子金具とを備え、
前記一方の端子金具及び／又は前記他方の端子金具は、スタック接続部と、電線接続部と、これら前記スタック接続部及び前記電線接続部の中間に位置して連続部分になる中間連続部とを有し、
該中間連続部は、前記スタック接続部及び前記電線接続部を非直線的に配置する部分に形成され、
前記電線による前記一方の電池スタック及び前記他方の電池スタックの接続の状態においては、前記中間連続部に前記電線本体の一部が通過する
ことを特徴とする電池スタック同士の電線接続構造。
It includes one battery stack, the other battery stack arranged in the stack stacking direction with respect to the one battery stack, and an electrical connection member for electrically connecting the one battery stack and the other battery stack. ,
The electric connection member includes a wire body, a high-voltage electric wire having electric wire terminal portions at both ends thereof, and one terminal fitting and the other terminal fitting provided on the electric wire terminal portion.
The one terminal fitting and / or the other terminal fitting has a stack connection portion, an electric wire connection portion, and an intermediate continuous portion located between the stack connection portion and the electric wire connection portion to be a continuous portion. Have and
The intermediate continuous portion is formed in a portion where the stack connection portion and the electric wire connection portion are arranged in a non-linear manner.
A wire connection structure between battery stacks, characterized in that a part of the wire body passes through the intermediate continuous portion in a state where the one battery stack and the other battery stack are connected by the wire.
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JP2018133341A (en) * 2015-12-15 2018-08-23 株式会社オートネットワーク技術研究所 Bus bar
JP2019008874A (en) * 2017-06-20 2019-01-17 矢崎総業株式会社 Wire connection bus bar and conductive module

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